UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                -----------------

                                   FORM 10-Q/A
                                 Amendment No. 1

|X|   QUARTERLY REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

      For the quarterly period ended September 30, 2006

                                       OR

|_|   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
      EXCHANGE ACT OF 1934

      For the transition period from ______________ to ______________

                           Commission File No. 2-80070

                                ----------------

                         CASS INFORMATION SYSTEMS, INC.
             (Exact name of registrant as specified in its charter)

             Missouri                                  43-1265338
  (State or other jurisdiction              (I.R.S. Employer Identification No.)
of incorporation or organization)

         13001 Hollenberg Drive
           Bridgeton, Missouri                           63044
(Address of principal executive offices)               (Zip Code)

                                 (314) 506-5500
              (Registrant's telephone number, including area code)

                                -----------------

      Indicate by check mark whether the registrant: (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.       Yes |X|         No |_|

      Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, or a non-accelerated filer. See definition of
"accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange
Act.  (Check one)
   Large Accelerated Filer |_| Accelerated Filer |X| Non-Accelerated Filer |_|

      Indicate by check mark whether the registrant is a shell company (as
defined in Rule 12b-2 of the Exchange Act).     Yes |_|         No |X|

      The number of shares outstanding of registrant's only class of stock as of
November 6, 2006: Common stock, par value $.50 per share - 8,328,476 shares
outstanding.

Form 10-Q/A Amendment No. 1 EXPLANATORY NOTE This amendment on Form 10-Q/A is being filed to correct typographical errors in the Company's quarterly report on Form 10-Q for the quarter ended September 30, 2006 that was filed on November 8, 2006 (the "Report") regarding the amount of interest and fees on loans for the three months ended September 30, 2005, and for the nine months ended September 30, 2006 and 2005, as reflected in the Consolidated Statements of Income. The amounts of interest and fees on loans were not included in the correct columns due to a printer error during the EDGARization process. This amendment to the Report does not alter any part of the content of the Report, except for the changes and additional information provided herein. This amendment continues to speak as of the date of the Report. We have not updated the disclosures contained in this amendment to reflect any events that occurred at a date subsequent to the filing of the Report. The filing of this amendment is not a representation that any statements contained in the Report or this amendment are true or complete as of any date subsequent to the date of the Report. TABLE OF CONTENTS PART I - Financial Information Item 1. FINANCIAL STATEMENTS Consolidated Balance Sheets September 30, 2006 (unaudited) and December 31, 2005 .......... 3 Consolidated Statements of Income Three and nine months ended September 30, 2006 and 2005 (unaudited) .......................................... 4 Consolidated Statements of Cash Flows Nine months ended September 30, 2006 and 2005 (unaudited) ..... 5 Notes to Consolidated Financial Statements (unaudited) .......... 6 Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS ..................................... 13 Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK ...... 25 Item 4. CONTROLS AND PROCEDURES ......................................... 25 PART II - Other Information - Items 1. - 6. ................................ 26 SIGNATURES ............................................................... 27 Forward-looking Statements - Factors That May Affect Future Results This report may contain or incorporate by reference forward-looking statements made pursuant to the safe harbor provisions of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements are not guarantees of future performance and involve risks, uncertainties, and other factors which may cause future performance to vary from expected performance summarized in the forward-looking statements, including those set forth in this paragraph and in the "Risk Factors" section of the Company's Annual Report on Form 10-K, filed with the Securities and Exchange Commission. Important factors that could cause our actual results, performance, or achievements to be materially different from any future results, performance, or achievements expressed or implied by those statements include, but are not limited to: the failure to successfully execute our corporate plan, the loss of key personnel or inability to attract additional qualified personnel, the loss of key customers, increased competition, the inability to remain current with rapid technological change, risks related to acquisitions, risks associated with business cycles and fluctuations in interest rates, utility and system interruptions or processing errors, rules and regulations governing financial institutions and changes in such rules and regulations, credit risk related to borrowers' ability to repay loans, concentration of loans to certain segments such as commercial enterprises, churches and borrowers in the St. Louis area which creates risks associated with adverse factors that may affect these groups and volatility of the price of our common stock. We undertake no obligation to publicly update or revise any forward-looking statements to reflect changed assumptions, the occurrence of anticipated or unanticipated events, or changes to future results over time. -2-

PART I. FINANCIAL INFORMATION ITEM 1. FINANCIAL STATEMENTS CASS INFORMATION SYSTEMS, INC. AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (Unaudited) (Dollars in Thousands except Share and Per Share Data) September 30 December 31 2006 2005 ---------------------------- Assets Cash and due from banks $ 31,533 $ 29,561 Federal funds sold and other short-term investments 188,307 120,131 ----------- ----------- Cash and cash equivalents 219,840 149,692 ----------- ----------- Securities available-for-sale, at fair value 87,871 94,859 Loans 520,748 529,306 Less: Allowance for loan losses 5,929 6,284 ----------- ----------- Loans, net 514,819 523,022 ----------- ----------- Premises and equipment, net 13,024 11,987 Investment in bank owned life insurance 11,898 11,545 Payments in excess of funding 13,410 7,665 Goodwill 7,171 4,398 Assets related to discontinued operations 225 400 Other intangible assets, net 1,529 935 Other assets 16,627 14,195 ----------- ----------- Total assets $ 886,414 $ 818,698 =========== =========== Liabilities and Shareholders' Equity Liabilities: Deposits: Noninterest-bearing $ 100,135 $ 116,396 Interest-bearing 175,053 170,602 ----------- ----------- Total deposits 275,188 286,998 Accounts and drafts payable 514,193 445,811 Short-term borrowings 150 188 Subordinated convertible debentures 3,700 3,700 Liabilities related to discontinued operations 388 1,848 Other liabilities 8,822 4,872 ----------- ----------- Total liabilities 802,441 743,417 ----------- ----------- Shareholders' Equity: Preferred stock, par value $.50 per share; 2,000,000 shares authorized and no shares issued -- -- Common stock, par value $.50 per share; 20,000,000 shares authorized; 9,112,484 and 6,336,593 shares issued at September 30, 2006 and December 31, 2005, respectively 4,556 3,168 Additional paid-in capital 17,756 18,326 Retained earnings 78,820 71,506 Common shares in treasury, at cost (784,217 shares at September 30, 2006 and 836,457 shares at December 31, 2005) (17,060) (17,313) Accumulated other comprehensive loss (99) (406) ----------- ----------- Total shareholders' equity 83,973 75,281 ----------- ----------- Total liabilities and shareholders' equity $ 886,414 $ 818,698 =========== =========== See accompanying notes to unaudited consolidated financial statements. -3-

CASS INFORMATION SYSTEMS, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Dollars in Thousands except Share and Per Share Data) Three Months Ended Nine Months Ended September 30 September 30 --------------------- --------------------- 2006 2005 2006 2005 - -------------------------------------------------------------------------------------------------------- Fee Revenue and Other Income: Information services payment and processing revenue $ 10,359 $ 9,157 $ 29,853 $ 26,486 Bank service fees 341 414 1,266 1,159 Gains on sales of investment securities -- -- -- 547 Other 228 149 629 492 -------- -------- -------- -------- Total fee revenue and other income 10,928 9,720 31,748 28,684 -------- -------- -------- -------- Interest Income: Interest and fees on loans 9,331 8,236 27,169 23,598 Interest and dividends on debt and equity securities: Taxable 262 218 800 593 Exempt from federal income taxes 636 347 1,910 1,069 Interest on federal funds sold and other short-term investments 2,022 1,012 4,702 2,260 -------- -------- -------- -------- Total interest income 12,251 9,813 34,581 27,520 -------- -------- -------- -------- Interest Expense: Interest on deposits 1,729 1,178 4,457 3,286 Interest on short-term borrowings 2 1 5 3 Interest on subordinated convertible debentures 50 50 148 148 -------- -------- -------- -------- Total interest expense 1,781 1,229 4,610 3,437 -------- -------- -------- -------- Net interest income 10,470 8,584 29,971 24,083 Provision for loan losses 200 225 500 625 -------- -------- -------- -------- Net interest income after provision for loan losses 10,270 8,359 29,471 23,458 -------- -------- -------- -------- Operating Expense: Salaries and employee benefits 11,136 9,600 31,673 28,280 Occupancy 522 499 1,462 1,443 Equipment 732 716 2,128 2,146 Amortization of intangible assets 70 42 156 128 Other operating expense 2,561 2,287 7,755 6,773 -------- -------- -------- -------- Total operating expense 15,021 13,144 43,174 38,770 -------- -------- -------- -------- Income before taxes and discontinued operations 6,177 4,935 18,045 13,372 Income tax expense 2,205 1,670 6,397 4,546 -------- -------- -------- -------- Net income from continuing operations 3,972 3,265 11,648 8,826 -------- -------- -------- -------- Loss from discontinued operations before income tax expense (150) (259) (475) (573) Income tax benefit 62 87 198 191 -------- -------- -------- -------- Net loss from discontinued operations (88) (172) (277) (382) Net Income $ 3,884 $ 3,093 $ 11,371 $ 8,444 ======== ======== ======== ======== Basic Earnings Per Share: From continuing operations $ .48 $ .39 $ 1.40 $ 1.07 From discontinued operations (.01) (.02) (.03) (.05) Basic earnings per share .47 .37 1.37 1.02 Diluted Earnings Per Share: From continuing operations $ .47 $ .38 $ 1.37 $ 1.04 From discontinued operations (.01) (.01) (.03) (.04) Diluted earnings per share .46 .37 1.34 1.00 See accompanying notes to unaudited consolidated financial statements. -4-

CASS INFORMATION SYSTEMS, INC. AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (Dollars in Thousands) Nine Months Ended September 30 ----------------------- 2006 2005 - ----------------------------------------------------------------------------------------- Cash Flows From Operating Activities: Net income from continuing operations $ 11,648 $ 8,826 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization 1,484 1,572 Gains on sales of investment securities -- (547) Provision for loan losses 500 625 Amortization of stock bonus awards 159 99 Tax benefit from exercise of stock options and bonuses -- 55 Deferred income tax benefit (1,031) (688) Increase in income tax liability 354 265 Increase in pension liability 1,566 1,086 Other operating activities, net (248) (1,400) Operating activities of discontinued operations (1,562) (131) --------- --------- Net cash provided by operating activities 12,870 9,762 --------- --------- Cash Flows From Investing Activities: Proceeds from sales of securities available-for-sale -- 12,952 Proceeds from maturities of securities available-for-sale 65,510 57,000 Purchase of securities available-for-sale (57,860) (68,854) Net decrease (increase) in loans 7,703 (18,769) Increase in payments in excess of funding (5,745) (2,989) Purchases of premises and equipment, net (2,547) (1,315) Purchase of NTransit, Inc. (3,172) -- Investing activities of discontinued operations -- (17) --------- --------- Net cash provided by (used in) investing activities 3,889 (21,992) --------- --------- Cash Flows From Financing Activities: Net (decrease) increase in noninterest-bearing demand deposits (16,261) 4,419 Net decrease in interest-bearing demand and savings deposits (15,829) (6,430) Net increase in time deposits 20,280 418 Net increase in accounts and drafts payable 68,382 74,229 Net (decrease) increase in short-term borrowings (38) 39 Cash proceeds from exercise of stock options 330 175 Tax benefit from exercise of stock options and bonuses 64 -- Cash dividends paid (2,669) (2,322) Purchase of common shares for treasury (870) (586) --------- --------- Net cash provided by financing activities 53,389 69,942 --------- --------- Net increase in cash and cash equivalents 70,148 57,712 Cash and cash equivalents at beginning of period 149,692 87,543 --------- --------- Cash and cash equivalents at end of period $ 219,840 $ 145,255 ========= ========= Supplemental information: Cash paid for interest $ 4,287 $ 3,418 Cash paid for income taxes 6,103 4,754 See accompanying notes to unaudited consolidated financial statements. -5-

CASS INFORMATION SYSTEMS, INC. AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Unaudited) Note 1 - Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management all adjustments, consisting of normal recurring accruals, considered necessary for a fair presentation have been included. Certain amounts in the 2005 consolidated financial statements have been reclassified to conform to the 2006 presentation. Such reclassifications have no effect on previously reported net income or shareholders' equity. The Company's bank subsidiary sold the assets of Government e-Management Solutions, Inc. ("GEMS"), its wholly owned subsidiary, on December 30, 2005. The assets, liabilities and results of operations of GEMS have been presented in the accompanying consolidated financial statements as discontinued operations. The Company issued 50% stock dividends on September 15, 2006 and September 15, 2005 and the share and per share information have been restated for all periods presented in the accompanying consolidated financial statements. For further information, refer to the audited consolidated financial statements and related footnotes included in Cass Information System, Inc.'s ("the Company" or "Cass") Annual Report on Form 10-K for the year ended December 31, 2005. Note 2 - Intangible Assets The Company accounts for intangible assets in accordance with Statement of Financial Accounting Standards ("SFAS") 142, "Goodwill and Other Intangible Assets," which requires that intangibles with indefinite useful lives be tested annually for impairment and those with finite useful lives be amortized over their useful lives. Intangible assets for the periods ended September 30, 2006 and December 31, 2005 are as follows: September 30, 2006 December 31, 2005 ================================================================================================================ Gross Carrying Accumulated Gross Carrying Accumulated (In Thousands) Amount Amortization Amount Amortization ================================================================================================================ Assets eligible for amortization: Software $ 862 $ (359) $ 862 $ (230) Customer List 750 (27) -- -- - ---------------------------------------------------------------------------------------------------------------- Total 1,612 (386) 862 (230) Assets not eligible for amortization: Goodwill 7,398 (227)* 4,625 (227)* Minimum pension liability 303 -- 303 -- - ---------------------------------------------------------------------------------------------------------------- Total 7,701 (227) 4,928 (227) - ---------------------------------------------------------------------------------------------------------------- Total intangible assets $ 9,313 $ (613) $ 5,790 $ (457) - ---------------------------------------------------------------------------------------------------------------- *Amortization through December 31, 2001 prior to adoption of SFAS 142. Software is amortized over 4-5 years and the customer list that was acquired in the NTransit purchase is amortized over seven years. Goodwill includes $2,773,000 acquired in the NTransit purchase. The minimum pension liability was recorded in accordance with SFAS 87, "Employers' Accounting for Pensions", which requires the Company to record an additional minimum pension liability by the amount of which the accumulated benefit obligation exceeds the sum of the fair value of plan assets and accrued amount previously recorded and offset this liability by an intangible asset to the extent of previously unrecognized prior service costs. The liability and corresponding intangible asset are adjusted annually. Amortization of intangible assets amounted to $156,000 and $128,000 for the nine-month periods ended September 30, 2006 and 2005, respectively. Estimated amortization of intangibles over the next five years is as follows: $226,000 in 2006, $280,000 in 2007 and 2008, $222,000 in 2009 and $107,000 in 2010. Note 3 - Equity Investments in Non-Marketable Securities Non-marketable equity investments in low-income housing projects are included in other assets on the Company's consolidated balance sheets. The total balance of these investments at September 30, 2006 was $357,000. Note 4 - Earnings Per Share Basic earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding. Diluted earnings per share is computed by dividing net income, adjusted for the net income effect of the interest expense on the outstanding convertible debentures, by the sum of the -6-

weighted-average number of common shares outstanding and the weighted-average number of potential common shares outstanding. The calculations of basic and diluted earnings per share for the periods ended September 30, 2006 and 2005 are as follows: Three Months Ended Nine Months Ended September 30 September 30 --------------------------- --------------------------- (Dollars in Thousands except Per Share data) 2006 2005 2006 2005 - ---------------------------------------------------------------------------------------------------------------- Basic Net income from continuing operations $ 3,972 $ 3,265 $ 11,648 $ 8,826 Net loss from discontinued operations (88) (172) (277) (382) - ---------------------------------------------------------------------------------------------------------------- Net income $ 3,884 $ 3,093 $ 11,371 $ 8,444 - ---------------------------------------------------------------------------------------------------------------- Weighted-average common shares outstanding 8,304,441 8,267,733 8,311,861 8,265,195 - ---------------------------------------------------------------------------------------------------------------- Basic earnings per share from continuing operations $ .48 $ .39 $ 1.40 $ 1.07 Basic earnings per share from discontinued operations (.01) (.02) (.03) (.05) - ---------------------------------------------------------------------------------------------------------------- Basic earnings per share $ .47 $ .37 $ 1.37 $ 1.02 - ---------------------------------------------------------------------------------------------------------------- Diluted Net income from continuing operations $ 3,972 $ 3,265 $ 11,648 $ 8,826 Net income effect of 5.33% convertible 1 debentures 28 27 82 8 - ---------------------------------------------------------------------------------------------------------------- Net income from continuing operations 4,000 3,292 11,730 8,907 Net loss from discontinued operations (88) (172) (277) (382) - ---------------------------------------------------------------------------------------------------------------- Net income $ 3,912 $ 3,120 $ 11,453 $ 8,525 - ---------------------------------------------------------------------------------------------------------------- Weighted-average common shares outstanding 8,304,441 8,267,733 8,311,861 8,265,195 Effect of dilutive stock options and awards 72,504 102,877 65,923 115,456 71,899 Effect of 5.33% convertible debentures 172,717 172,717 172,717 172,717 - ---------------------------------------------------------------------------------------------------------------- Weighted-average common shares outstanding assuming dilution 8,549,662 8,543,327 8,550,501 8,553,368 - ---------------------------------------------------------------------------------------------------------------- Diluted earnings per share from continuing operations $ .47 $ .38 $ 1.37 $ 1.04 Diluted earnings per share from discontinued operations (.01) (.01) (.03) (.04) - ---------------------------------------------------------------------------------------------------------------- Diluted earnings per share $ .46 $ .37 $ 1.34 $ 1.00 - ---------------------------------------------------------------------------------------------------------------- Share and per share data in the schedule above have been restated for the 50% stock dividends issued on September 15, 2006 and September 15, 2005. Note 5 - Stock Repurchases The Company maintains a treasury stock buyback program pursuant to which the Board of Directors has authorized the repurchase of up to 150,000 shares of the Company's Common Stock. The Company repurchased 30,000 and 22,500 shares during the nine months ended September 30, 2006 and 2005, respectively. As of September 30, 2006, 120,000 shares remained available for repurchase under the program. Repurchases are made in the open market or through negotiated transactions from time to time depending on market conditions. Note 6 - Comprehensive Income For the nine-month periods ended September 30, 2006 and 2005, unrealized gains and losses on debt and equity securities available-for-sale were the Company's only other comprehensive income component. Comprehensive income for the three and nine month-periods ended September 30, 2006 and 2005 is summarized as follows: -7-

Three Months Ended Nine Months Ended September 30 September 30 ------------------ ------------------ (In Thousands) 2006 2005 2006 2005 - ----------------------------------------------------------------------------------------------------- Net income from continuing operations $ 3,972 $ 3,265 $11,648 $ 8,826 Other comprehensive income: Net unrealized gain (loss) on securities available-for-sale, net of tax 793 (34) 307 7 Less: reclassification adjustment for realized gains on sales of securities, available-for-sale, included in net income, net of tax -- -- -- (361) - ----------------------------------------------------------------------------------------------------- Total other comprehensive income (loss) 793 (34) 307 (354) - ----------------------------------------------------------------------------------------------------- Total comprehensive income from continuing operations $ 4,765 $ 3,231 $11,955 $ 8,472 - ----------------------------------------------------------------------------------------------------- Note 7 - Industry Segment Information The services provided by the Company are classified into two reportable segments: Information Services and Banking Services. Each of these segments provides distinct services that are marketed through different channels. They are managed separately due to their unique service, processing and capital requirements. The Information Services segment provides freight, utility and telecommunication invoice processing and payment services to large corporations. The Banking Services segment provides banking services primarily to privately-held businesses and churches. The Company's accounting policies for segments are the same as those described in the summary of significant accounting policies in the Company's Annual Report on Form 10-K for the year ended December 31, 2005. Management evaluates segment performance based on net income after allocations for corporate expenses and income taxes. Transactions between segments are accounted for at what management believes to be market value. Information for prior periods has been restated to reflect changes in the composition of the Company's segments. All revenue originates from and all long-lived assets are located within the United States and no revenue from any customer of any segment exceeds 10% of the Company's consolidated revenue. Summarized information about the Company's operations in each industry segment for the three and nine month periods ended September 30, 2006 and 2005, is as follows: Corporate, Information Banking Eliminations (In Thousands) Services Services and Other Total - --------------------------------------------------------------------------------------------------------------------- Three Months Ended September 30, 2006: Total Revenues: Revenue from customers $ 17,593 $ 3,605 $ -- $ 21,198 Intersegment revenue (109) 921 (812) -- Net income from continuing operations 2,837 1,135 -- 3,972 Total assets 569,760 318,136 (1,482) 886,414 Goodwill 7,035 136 -- 7,171 Other intangible assets, net 1,529 -- -- 1,529 Assets related to discontinued operations -- -- 225 225 Three Months Ended September 30, 2005: Total Revenues: Revenue from customers $ 14,277 $ 3,802 $ -- $ 18,079 Intersegment revenue 481 358 (839) -- Net income from continuing operations 2,250 1,015 -- 3,265 Total assets 478,215 322,065 (5,044) 795,236 Goodwill 4,262 153 -- 4,415 Other intangible assets, net 675 -- 353 1,028 Assets related to discontinued operations -- -- 4,453 4,453 - --------------------------------------------------------------------------------------------------------------------- Nine Months Ended September 30, 2006: Total Revenues: Revenue from customers $ 49,469 $ 11,750 $ -- $ 61,219 Intersegment revenue 778 1,633 (2,411) -- Net income from continuing operations 8,267 3,381 -- 11,648 Nine Months Ended September 30, 2005: Total Revenues: Revenue from customers $ 41,251 $ 10,891 $ -- $ 52,142 Intersegment revenue 80 1,103 (1,183) -- Net income from continuing operations 5,772 3,054 -- 8,826 -8-

Note 8 - Loans by Type (In Thousands) September 30, 2006 December 31, 2005 ================================================================================ Commercial and industrial $ 136,575 $ 146,892 Real estate: Mortgage 139,218 164,590 Mortgage - Churches & related 203,713 183,964 Construction 16,661 13,052 Construction - Churches & related 16,134 15,118 Industrial revenue bonds 5,549 4,514 Installment -- 107 Other 2,898 1,069 - -------------------------------------------------------------------------------- Total loans $ 520,748 $ 529,306 ================================================================================ Note 9 - Commitments and Contingencies In the normal course of business, the Company is party to activities that contain credit, market and operational risks that are not reflected in whole or in part in the Company's consolidated financial statements. Such activities include traditional off-balance sheet credit-related financial instruments and commitments under operating and capital leases. These financial instruments include commitments to extend credit, commercial letters of credit and standby letters of credit. The Company's maximum potential exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit, commercial letters of credit and standby letters of credit is represented by the contractual amounts of those instruments. At September 30, 2006, no amounts have been accrued for any estimated losses for these instruments. Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commercial and standby letters of credit are conditional commitments issued by the Company or its subsidiaries to guarantee the performance of a customer to a third party. These off-balance sheet financial instruments generally have fixed expiration dates or other termination clauses and may require payment of a fee. At September 30, 2006, the balances of unused loan commitments, standby and commercial letters of credit were $18,353,000, $5,447,000 and $2,539,000, respectively. Since these financial instruments may expire without being drawn upon, the total amounts do not necessarily represent future cash requirements. Commitments to extend credit and letters of credit are subject to the same underwriting standards as those financial instruments included on the consolidated balance sheets. The Company evaluates each customer's credit worthiness on a case-by-case basis. The amount of collateral obtained, if deemed necessary upon extension of the credit, is based on management's credit evaluation of the borrower. Collateral held varies, but is generally accounts receivable, inventory, residential or income-producing commercial property or equipment. In the event of nonperformance, the Company or its subsidiaries may obtain and liquidate the collateral to recover amounts paid under its guarantees on these financial instruments. The following table summarizes contractual cash obligations of the Company related to operating and capital lease commitments, time deposits and convertible subordinated debentures at September 30, 2006: Amount of Commitment Expiration per Period --------------------------------------------------- Less than 1-3 3-5 Over 5 (Dollars in Thousands) Total 1 Year Years Years Years =========================================================================================== Operating lease commitments $ 4,316 $ 645 $ 1,186 $ 823 $ 1,662 Time deposits* 87,333 80,012 4,857 2,464 -- Convertible subordinated debentures* 3,700 -- -- -- 3,700 - ------------------------------------------------------------------------------------------- Total $95,349 $80,657 $ 6,043 $ 3,287 $ 5,362 =========================================================================================== * Includes principal payments only. -9-

The Company and its subsidiaries are involved in various pending legal actions and proceedings in which claims for damages are asserted. Management, after discussion with legal counsel, believes the ultimate resolution of these legal actions and proceedings will not have a material effect upon the Company's consolidated financial position or results of operations. Note 10 - Stock-Based Compensation The Company maintains stock-based incentive plans, which permit the awards of shares of restricted common stock and the granting of options to purchase up to 1,039,000 shares of common stock. Restricted shares are amortized to expense over the three-year vesting period. Options currently vest and expire over a period not to exceed seven years. The plans authorize the grant of awards in the form of options intended to qualify as incentive stock options under Section 422 of the Internal Revenue Code, options that do not qualify (non-statutory stock options) and grants of restricted shares of common stock. The Company issues shares out of treasury stock for restricted shares and option exercises. Prior to fiscal 2006, the Company applied the intrinsic value-based method, as outlined in Accounting Principles Board Opinion ("APB") No. 25, "Accounting for Stock Issued to Employees," and related interpretations, in accounting for stock options granted under these programs. Under the intrinsic value-based method, no compensation expense was recognized if the exercise price of the Company's employee stock options equaled the market price of the underlying stock on the date of the grant. Accordingly, prior to fiscal year 2006, no compensation cost was recognized in the accompanying consolidated statements of income on stock options granted to employees, since all options granted under the Company's share incentive programs had an exercise price equal to the market value of the underlying common stock on the date of the grant. Effective January 1, 2006, the Company adopted Statement of Financial Accounting Standards No. 123R ("SFAS No. 123R") "Share-based Payment." This statement supersedes APB No. 25. SFAS No. 123R requires that all stock-based compensation be recognized as an expense in the financial statements and that such cost be measured at the fair value of the award. This statement was adopted using the modified prospective method of application, which requires the Company to recognize compensation expense on a prospective basis. Therefore, prior period financial statements have not been restated. Under this method, in addition to reflecting compensation expense for new share-based awards, expense is also recognized to reflect the remaining service period of awards that had been included in pro forma disclosures in prior periods. SFAS No. 123R also requires that excess tax benefits related to stock option exercises be reflected as financing cash inflows instead of operating cash inflows. For the nine months ended September 30, 2006, the only options exercised were incentive stock options that did not generate any excess tax benefits for the Company. As of September 30, 2006, the total unrecognized compensation expense related to non-vested stock options was $140,000 and the related weighted-average period over which it is expected to be recognized is approximately 5.0 years. As of September 30, 2006, the total unrecognized compensation expense related to non-vested stock awards was $413,000 and the related weighted-average period over which it is expected to be recognized is approximately 1.5 years. The disclosures required by SFAS No. 123R are provided in the table below. The Company uses the Black-Scholes option-pricing model to determine the fair value of the stock options at the date of grant. There were 25,227 and 13,242 options granted in the first nine months of 2006 and 2005, respectively. The following table represents the effect on basic and diluted earnings per share for the periods ended September 30, 2005 assuming SFAS 123R had been adopted: -10-

Three Months Ended Nine Months Ended September 30 September 30 (In Thousands except Per Share Data (1)) 2005 2005 - ------------------------------------------------------------------------------------------------------ Net income from continuing operations As reported $ 3,265 $ 8,826 Add: Stock-based compensation expense included in reported net income, net of tax 22 63 Less: Stock-based compensation expense determined under the fair-value-based method for all awards, net of tax (27) (80) - ------------------------------------------------------------------------------------------------------ Pro forma net income from continuing operations $ 3,260 $ 8,809 Net income effect of subordinated convertible debentures 27 81 - ------------------------------------------------------------------------------------------------------ Pro forma net income from continuing operations assuming dilution $ 3,287 $ 8,890 - ------------------------------------------------------------------------------------------------------ Net income from continuing operations per common share: Basic, as reported $ .39 $ 1.07 Basic, pro forma .40 1.07 Diluted , as reported .38 1.04 Diluted, pro forma .38 1.04 - ------------------------------------------------------------------------------------------------------ (1) Per share data has been restated for the 50% stock dividends issued on September 15, 2006 and September 15, 2005. Following are the assumptions used to estimate the fair value of option grants during the three and nine-month periods ended September 30, 2006 and 2005: Three Months E nded Nine Months Ended September 30 September 30 - ---------------------------------------------------------------------------------------------------------------------- 2006 2005 2006 2005 Risk-free interest rate -- -- 4.37% 3.97% Expected life -- -- 7 yrs. 7 yrs. Expected volatility -- -- 5.00% 15.00% Expected dividend yield -- -- 1.88% 2.32% - ---------------------------------------------------------------------------------------------------------------------- The risk-free interest rate is based on the zero-coupon U.S. Treasury yield for the period equal to the expected life of the options at the time of the grant. The expected life was derived using the historical exercise activity. The Company uses historical volatility for a period equal to the expected life of the options using average monthly closing market prices of the Company's stock. The expected dividend yield is determined based on the Company's current rate of annual dividends. Under the treasury stock method, outstanding stock options are dilutive when the average market price of the Company's common stock, when combined with the effect of any unamortized compensation expense, exceeds the option price during a period. In addition, proceeds from the assumed exercise of dilutive options along with the related tax benefit are assumed to be used to repurchase common shares at the average market price of such stock during the period. Anti-dilutive shares are those option shares with exercise prices in excess of the current market value. A summary of the Company's stock option activity for the three and nine-month periods ended September 30, 2006 is shown below. Weighted- Average Aggregate Average Remaining Intrinsic Exercise Contractual Value Shares Price Term Years ($000) ============================================================= Outstanding at December 31, 2005 209,851 $ 10.67 Granted 25,227 22.73 Exercised (134,724) 9.72 Forfeited or expired -- -- Outstanding at June 30, 2006 100,354 15.03 Granted -- -- Exercised (5,505) 9.56 Forfeited or expired -- -- --------- -------- Outstanding at September 30, 2006 94,849 15.34 4.56 $ 1,685 ============================================================= Exercisable at September 30, 2006 2,399 $ 9.95 3.09 $ 56 ============================================================= -11-

The total intrinsic value of options exercised during the three and nine-month periods ended September 30, 2006 was $105,000 and $1,728,000, respectively. The total intrinsic value of options exercised during the three and nine-month periods ended September 30, 2005 was $103,000 and $216,000, respectively. The Company does not anticipate any additional options will be exercised during 2006. A summary of the activity of the non-vested shares during the nine-month period ended September 30, 2006 is shown below. There was no activity for the three-month period ended September 30, 2006. Weighted- Average Grant Date Shares Fair Value - -------------------------------------------------------------------------------- Non-vested at December 31, 2005 168,047 $ 1.82 Granted 25,229 3.25 Vested (100,826) 1.68 Forfeited -- -- - -------------------------------------------------------------------------------- Non-vested at September 30, 2006 92,450 $ 2.37 ================================================================================ The weighted-average grant date fair value of options granted during the nine-month period ended September 30, 2006 was $3.25. Note 11 - Defined Pension Plans The Company has a noncontributory defined benefit pension plan, which covers most of its employees. The Company accrues and makes contributions designed to fund normal service costs on a current basis using the projected unit credit with service proration method to amortize prior service costs arising from improvements in pension benefits and qualifying service prior to the establishment of the plan over a period of approximately 30 years. Disclosure information is based on a measurement date of December 31 of the corresponding year. The following table represents the components of the net periodic pension costs for 2005 and an estimate for 2006: Estimated Actual (In Thousands) 2006 2005 =============================================================================== Service cost - benefits earned during the year $ 1,554 $ 1,292 Interest cost on projected benefit obligation 1,565 1,384 Expected return on plan assets (1,603) (1,312) Net amortization 270 109 - ------------------------------------------------------------------------------- Net periodic pension cost $ 1,786 $ 1,473 - ------------------------------------------------------------------------------- Pension costs recorded to expense were $586,000 and $346,000 for the three-month periods ended September 30, 2006 and 2005 ("Third Quarter of 2006 and 2005", respectively). Pension costs recorded to expense were $1,339,000 and $1,039,000 for the first nine-month periods ending September 30, 2006 and 2005 ("First Nine Months of 2006 and 2005", respectively). The Company has not made any contribution to the plan during the nine-month period ended September 30, 2006, but is expecting to contribute approximately $3,200,000 in 2006. In addition to the above funded benefit plan, the Company has an unfunded supplemental executive retirement plan which covers key executives of the Company. This is a noncontributory plan in which the Company and its subsidiaries make accruals designed to fund normal service costs on a current basis using the same method and criteria as its defined benefit plan. The following table represents the components of the net periodic pension costs for 2005 and an estimate for 2006: Estimated Actual (In Thousands) 2006 2005 =============================================================================== Service cost - benefits earned during the year $ 43 $ (34) Interest cost on projected benefit obligation 149 161 Net amortization 112 64 - ------------------------------------------------------------------------------- Net periodic pension cost $ 304 $ 191 - ------------------------------------------------------------------------------- Pension costs recorded to expense were $163,000 and $49,000 for the Third Quarter of 2006 and 2005, respectively, and were $258,000 and $143,000 for the First Nine Months of 2006 and 2005, respectively. -12-

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS Overview Cass Information Systems, Inc. provides payment and information processing services to large manufacturing, distribution and retail enterprises from its processing centers in St. Louis, Missouri, Columbus, Ohio, Boston, Massachusetts, Greenville, South Carolina and Wellington, Kansas. The Company's services include freight invoice rating, payment processing, auditing, and the generation of accounting and transportation information. Cass also processes and pays utility invoices, which includes electricity, gas and telecommunications expenses and is a provider of telecom expense management solutions. Cass extracts, stores and presents information from freight, utility and telecommunication invoices, assisting its customers' transportation, energy and information technology managers in making decisions that will enable them to improve operating performance. The Company receives data from multiple sources, electronic and otherwise, and processes the data to accomplish the specific operating requirements of its customers. It then stores the data in a central repository for access and archiving. The data is finally transformed into information through the Company's databases that allow client interaction as required and provide Internet-based tools for analytical processing. The Company also, through Cass Commercial Bank ("the Bank"), its St. Louis, Missouri-based bank subsidiary, provides banking services in the St. Louis metropolitan area, Orange County, California and other selected cities in the United States. In addition to supporting the Company's payment operations, the Bank provides banking services to its target markets, which include privately-owned businesses and churches and church-related ministries. The specific payment and information processing services provided to each customer are developed individually to meet each customer's requirements that can vary greatly. In addition, the degree of automation such as electronic data interchange ("EDI"), imaging, and web-based solutions varies greatly among customers and industries. These factors combine so that pricing varies greatly among the customer base. In general, however, Cass is compensated for its processing services through service fees and account balances that are generated during the payment process. The amount, type and calculation of service fees vary greatly by service offering, but generally follow the volume of transactions processed. Interest income from the balances generated during the payment processing cycle is affected by the amount of time Cass holds the funds prior to payment and the dollar volume processed. Both the number of transactions processed and the dollar volume processed are therefore key metrics followed by management. Other factors will also influence revenue and profitability, such as changes in the general level of interest rates which have a significant effect on net interest income. The funds generated by these processing activities are invested in overnight investments, investment grade securities and loans generated by the Bank. The Bank earns most of its revenue from net interest income, or the difference between the interest earned on its loans and investments and the interest expense on its deposits. The Bank also assesses fees on other services such as cash management services. Industry-wide factors that impact the Company include the acceptance by large corporations of the outsourcing of key business functions such as freight, utility and telecommunication payment and audit. The benefits that can be achieved by outsourcing transaction processing and the management information generated by Cass' systems can be influenced by factors such as the competitive pressures within industries to improve profitability, the general level of transportation costs, deregulation of energy costs and consolidation of telecommunication providers. Economic factors that impact the Company include the general level of economic activity that can affect the volume and size of invoices processed, the ability to hire and retain qualified staff and the growth and quality of the loan portfolio. The general level of interest rates also has a significant effect on the revenue of the Company. On December 30, 2005, the Company's bank subsidiary sold the operating assets of its wholly-owned subsidiary, GEMS, to N. Harris Computer Corporation. The assets, liabilities and operating results of GEMS have been reclassified as discontinued operations for all periods. GEMS developed and sold proprietary financial, human resource and revenue management software to government entities. GEMS was acquired on January 2, 2001 when the Company's bank subsidiary foreclosed on the operating assets of a software company in order to protect its financial interests. On July 7, 2006, the Company acquired 100% of the stock of NTransit, Inc., a company whose service provides auditing and expense management of parcel shipments. While this acquisition does not meet the Regulation S-X criteria of a significant business combination, it positions the Company to expand its offerings in the specialized service and expertise in parcel shipping, which is a unique segment of the transportation industry that has experienced tremendous growth in recent years. -13-

Currently, management views Cass' major opportunity and challenge as the continued expansion of its payment and information processing service offerings and customer base. Management intends to accomplish this by maintaining the Company's lead in applied technology, which, when combined with the security and processing controls of the Bank, makes Cass unique in the industry. This trend has been positive over the past years and management anticipates that this should continue in 2006. The general level of interest rates, particularly short-term interest rates, began to increase in 2004 and continued through the first nine months of 2006. If rates continue to rise, the positive impact on net interest income and net earnings will continue. Conversely, if rates decline there will be a negative impact. Management intends to continue to refine its risk management practices, monitor and manage the quality of the loan portfolio and maintain a strong financial and liquidity position. Critical Accounting Policies The Company has prepared the consolidated financial information in this report in accordance with U.S. GAAP. In preparing the consolidated financial statements in accordance with U.S. GAAP, management makes estimates and assumptions that affect the reported amount of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. These estimates have been generally accurate in the past, have been consistent and have not required any material changes. There can be no assurances that actual results will not differ from those estimates. Certain accounting policies that require significant management estimates and are deemed critical to our results of operations or financial position have been discussed with the Audit Committee of the Board of Directors and are described below. Allowance for Loan Losses. The Company performs periodic and systematic detailed reviews of its loan portfolio to assess overall collectability. The level of the allowance for loan losses reflects management's estimate of the collectability of the loan portfolio. Although these estimates are based on established methodologies for determining allowance requirements, actual results can differ significantly from estimated results. These policies affect both segments of the Company. The impact and associated risks related to these policies on our business operations are discussed in the "Provision and Allowance for Loan Losses" section of this report. Impairment of Assets. The Company periodically evaluates certain long-term assets such as intangible assets including goodwill, foreclosed assets, internally developed software and investments in private equity securities for impairment. Generally, these assets are initially recorded at cost, and recognition of impairment is required when events and circumstances indicate that the carrying amounts of these assets will not be recoverable in the future. If impairment occurs, various methods of measuring impairment may be called for depending on the circumstances and type of asset, including quoted market prices, estimates based on similar assets, and estimates based on valuation techniques such as discounted projected cash flows. Assets held for sale are carried at the lower of cost or fair value less costs to sell. These policies affect both segments of the Company and require significant management assumptions and estimates that could result in materially different results if conditions or underlying circumstances change. Income Taxes. The Company accounts for income taxes in accordance with SFAS No. 109, "Accounting for Income Taxes," which establishes financial accounting and reporting standards for the effect of income taxes. The objectives of accounting for income taxes are to recognize the amount of taxes payable or refundable for the current year and deferred tax liabilities and assets for the future tax consequences of events that have been recognized in an entity's financial statements or tax returns. Judgment is required in addressing the future tax consequences of events that have been recognized in the Company's financial statements or tax returns such as the realization of deferred tax assets, changes in tax laws or interpretations thereof. In addition, the Company is subject to the continuous examination of its income tax returns by the Internal Revenue Service and other taxing authorities. A change in the assessment of the outcomes of such matters could materially impact its consolidated financial statements. Results of Operations The following paragraphs more fully discuss the results of operations and changes in financial condition for the Third Quarter of 2006 compared to the Third Quarter of 2005 and the First Nine Months of 2006 compared to the First Nine Months of 2005. The following discussion and analysis should be read in conjunction with the consolidated financial statements and related notes and with the statistical information and financial data appearing in this report as well as the Company's 2005 Annual Report on Form 10-K. Results of operations for the Third Quarter of 2006 are not necessarily indicative of the results to be attained for any other period. -14-

Net Income The following table summarizes the Company's operating results: Three Months Ended Nine Months Ended September 30 September 30 ----------------------------------- --------------------------------- (Dollars in Thousands except Per Share Data) % % 2006 2005 Change 2006 2005 Change - -------------------------------------------------------------------------------- --------------------------------- Net income $ 3,884 $ 3,093 25.6% $ 11,371 $ 8,444 34.7% Net income from continuing operations $ 3,972 $ 3,265 21.7% $ 11,648 $ 8,826 32.0% Diluted earnings per share $ .46 $ .37 24.3% $ 1.34 $ 1.00 34.0% Diluted earnings per share from continuing operations $ .47 $ .38 23.7% $ 1.37 $ 1.04 31.7% Return on average assets 1.80% 1.57% -- 1.84% 1.49% -- Return on average equity 19.12% 16.88% -- 19.45% 15.91% -- - --------------------------------------------------------------------------------------------------------------------- Fee Revenue and Other Income from Continuing Operations The Company's fee revenue is derived mainly from freight and utility processing and payment fees. As the Company provides its processing and payment services, it is compensated by service fees which are typically calculated on a per-item basis and by the accounts and drafts payable balances generated in the payment process which can be used to generate interest income. Processing volumes related to fees and accounts and drafts payable for the three and nine-month periods ended September 30, 2006 and 2005 were as follows: Three Months Ended Nine Months Ended September 30 September 30 --------------------------------- ----------------------------------- (In Thousands) % % 2006 2005 Change 2006 2005 Change - --------------------------------------------------------------------------------- ----------------------------------- Freight Core Invoice Transaction Volume* 6,154 5,815 5.8% 18,311 16,488 11.1% Freight Invoice Dollar Volume $3,648,694 $3,111,175 17.3% $10,722,994 $8,548,554 25.4% Utility Transaction Volume 1,701 1,421 19.7% 4,797 4,225 13.5% Utility Transaction Dollar Volume $1,538,628 $1,148,438 34.0% $ 4,188,578 $3,166,853 32.3% Payment and Processing Fees $ 10,359 $ 9,157 13.1% $ 29,853 $ 26,486 12.7% - ------------------------------------------------------------------------------------------------------------------------ *Core invoices exclude parcel shipments. Third Quarter of 2006 compared to Third Quarter of 2005: Freight transaction volume for the Third Quarter of 2006 increased mainly due to increased activity with existing accounts and a growing customer base. Total dollar volume processed by this division also increased during this period due to the increased activity and larger average freight charges. The increase in transaction and dollar volume from utility transactions increased primarily due to new customers as the growth of this division continues. These increases in transaction volume, combined with the expansion of the customer base in the telecom division, drove the 13% increase in processing fees. Bank service fees decreased $73,000 or 18%. This decrease was due primarily to the fact that service fees decrease as the credit allowance for non-interest bearing deposits increases with the general level of interest rates. There were no gains from the sale of securities in the Third Quarter of 2006 and the Third Quarter of 2005. Other income increased $79,000 in the Third Quarter of 2006. First Nine Months of 2006 compared to First Nine Months of 2005: Freight and Utility transaction volume and dollar volume increased for the First Nine Months of 2006 compared to 2005 due to the same factors discussed above for the Third Quarter. Bank service fees increased $107,000 or 9%. This increase was due primarily to a penalty charged for the early withdrawal of a certificate of deposit by one large bank customer during the First Quarter of 2006. There were no gains from the sale of securities in the First Nine Months of 2006 compared to a net gain of $547,000 during the First Nine Months of 2005. Other income increased $137,000 in the First Nine Months of 2006. -15-

Net Interest Income Net interest income is the difference between interest earned on loans, investments, and other earning assets and interest expense on deposits and other interest-bearing liabilities. Net interest income is a significant source of the Company's revenues. The following table summarizes the changes in net interest income and related factors for the three and nine-month periods ended September 30, 2006 and 2005: Three Months Ended Nine Months Ended September 30 September 30 ------------------------------------- ------------------------------------ % % (Dollars in Thousands) 2006 2005 Change 2006 2005 Change - --------------------------------------------------------------------------------- ------------------------------------ Average earnings assets $ 774,293 $ 700,442 10.5% $ 751,769 $ 682,092 10.2% Net interest income* 10,842 8,798 23.2% 31,093 24,738 25.7% Net interest margin* 5.56% 4.98% -- 5.53% 4.85% -- Yield on earning assets* 6.47% 5.68% -- 6.35% 5.52% -- Rate on interest bearing liabilities 3.83% 2.61% -- 3.44% 2.37% -- *Presented on a tax-equivalent basis assuming a tax rate of 35% . Third Quarter of 2006 compared to Third Quarter of 2005: The increase in net interest income was primarily due to a significant increase in earning assets and an increase in yields on earning assets that exceeded the counteracting effect of increases in rates paid on deposit accounts. The increase in earning assets was funded by an increase in accounts and drafts payable due to the increase in dollar volume processed that exceeded a decrease in bank deposits. This decrease was caused mainly by management's decision to reduce the balances of higher-cost funding. Yields on earning assets and rates paid on deposit accounts both increased as the general level of interest rates increased. However, as the balances of earning assets greatly exceed the balances of interest-bearing deposits, the net effect on net interest margin was positive. Total average loans increased $14,688,000 or 3% to $527,784,000. This increase was attributable to new business relationships and was funded by the increase in accounts and drafts payable. Total average investment in debt and equity securities increased $23,012,000 or 35% to $88,734,000 as the Company invested a portion of the increase in payables. Total average federal funds sold and other short-term investments increased $36,151,000 or 30% to $157,775,000. This increase provides additional liquidity to the Company. For more information on the changes in net interest income please refer to the tables that follow. First Nine Months of 2006 compared to First Nine Months of 2005: The increase in net interest income was primarily due to a significant increase in earning assets and an increase in yields on earning assets that exceeded the counteracting effect of increases in rates paid on deposit accounts. The increase in earning assets was funded by an increase in accounts and drafts payable due to the increase in dollar volume processed that exceeded a decrease in bank deposits. This decrease was caused mainly by management's decision to reduce the balances of higher-cost funding. Yields on earning assets and rates paid on deposit accounts both increased as the general level of interest rates increased. However, as the balances of earning assets greatly exceed the balances of interest-bearing deposits, the net effect on net interest margin was positive. Total average loans increased $18,297,000 or 4% to $528,250,000. This increase was attributable to new business relationships and was funded by the increase in accounts and drafts payable. Total average investment in debt and equity securities increased $25,256,000 or 38% to $91,672,000 as the Company invested a portion of the increase in payables. Total average federal funds sold and other short-term investments increased $26,124,000 or 25% to $131,847,000. This increase provides additional liquidity to the Company. For more information on the changes in net interest income please refer to the tables that follow. The Company is positively affected by increases in the level of interest rates due to the fact that its rate-sensitive assets significantly exceed its rate-sensitive liabilities. This is primarily due to the noninterest-bearing liabilities generated by the Company in the form of accounts and drafts payable. Changes in interest rates will affect some earning assets such as federal funds sold and floating rate loans immediately and some earning assets, such as fixed rate loans and municipal bonds, over time. -16-

Distribution of Assets, Liabilities and Stockholders' Equity; Interest Rate and Interest Differential The following table shows the condensed average balance sheets for each of the periods reported, the tax-equivalent interest income and expense on each category of interest-earning assets and interest-bearing liabilities, and the average yield on such categories of interest-earning assets and the average rates paid on such categories of interest-bearing liabilities for each of the periods reported. Third Quarter 2006 Third Quarter 2005 ====================================== ================================== Interest Interest Average Income/ Yield/ Average Income/ Yield/ (Dollars in Thousands) Balance Expense Rate Balance Expense Rate ======================================================================================================================= Assets (1) Earning assets: Loans (2,3): Taxable $ 522,439 $ 9,273 7.04% $ 508,263 $ 8,185 6.39% Tax-exempt (4) 5,345 88 6.53 4,833 78 6.40 Debt and equity securities (5): Taxable 22,600 263 4.62 28,724 218 3.00 Tax-exempt (4) 66,134 978 5.87 36,998 534 5.74 Federal funds sold and other short-term investments 157,775 2,022 5.08 121,624 1,012 3.30 Total earning assets 774,293 12,624 6.47 700,442 10,027 5.68 Nonearning assets: Cash and due from banks 29,914 30,398 Premises and equipment, net 12,886 11,242 Bank owned life insurance 11,818 11,351 Goodwill and other intangibles 5,269 5,479 Other assets 26,355 22,630 Assets related to discontinued operations 396 6,128 Allowance for loan losses (6,313) (6,063) - ----------------------------------------------------------------------------------------------------------------------- Total assets $ 854,618 $ 781,607 - ----------------------------------------------------------------------------------------------------------------------- Liabilities And Shareholders' Equity (1) Interest-bearing liabilities: Interest-bearing demand deposits $ 63,845 $ 429 2.67% $ 74,360 $ 355 1.89% Savings deposits 26,338 201 3.03 29,602 135 1.81 Time deposits of $100 or more 61,631 762 4.91 42,697 369 3.43 Other time deposits 28,845 338 4.65 36,497 319 3.47 - ----------------------------------------------------------------------------------------------------------------------- Total interest-bearing deposits 180,659 1,730 3.80 183,156 1,178 2.55 Short-term borrowings 197 2 4.03 134 1 2.96 Subordinated debentures 3,700 50 5.36 3,700 50 5.36 - ----------------------------------------------------------------------------------------------------------------------- Total interest-bearing liabilities 184,556 1,782 3.83 186,990 1,229 2.61 Noninterest-bearing liabilities: Demand deposits 98,542 103,996 Accounts and drafts payable 481,988 409,026 Other liabilities 8,664 7,149 Liabilities related to discontinued operations 242 1,779 - ----------------------------------------------------------------------------------------------------------------------- Total liabilities 773,992 708,940 Shareholders' equity 80,626 72,667 Total liabilities and shareholders' equity $ 854,618 $ 781,607 - ----------------------------------------------------------------------------------------------------------------------- Net interest income $ 10,842 $ 8,798 Interest spread 2.64% 3.07% Net interest margin 5.56 4.98 ======================================================================================================================= 1. Balances shown are daily averages. 2. For purposes of these computations, nonaccrual loans are included in the average loan amounts outstanding. Interest on nonaccrual loans is recorded when received as discussed further in Note 1 to the Company's 2005 Consolidated Financial Statements, filed with the Company's 2005 Annual Report on Form 10-K. 3. Interest income on loans includes net loan fees of $55,000 and $45,000 for the Third Quarter of 2006 and 2005, respectively. 4. Interest income is presented on a tax-equivalent basis assuming a tax rate of 35%. The tax-equivalent adjustment was approximately $373,000 and $214,000 for the Third Quarter of 2006 and 2005, respectively. 5. For purposes of these computations, yields on investment securities are computed as interest income divided by the average amortized cost of the investments. -17-

First Nine Months of 2006 First Nine Months of 2005 ===================================== ================================== Interest Interest Average Income/ Yield/ Average Income/ Yield/ (Dollars in Thousands) Balance Expense Rate Balance Expense Rate ======================================================================================================================= Assets (1) Earning assets: Loans (2,3): Taxable $ 522,940 $ 26,994 6.90% $ 505,072 $ 23,445 6.21% Tax-exempt (4) 5,310 268 6.75 4,881 235 6.44 Debt and equity securities (5): Taxable 25,506 800 4.19 28,681 593 2.76 Tax-exempt (4) 66,166 2,939 5.94 37,735 1,642 5.82 Federal funds sold and other short-term investments 131,847 4,702 4.77 105,723 2,260 2.86 - ----------------------------------------------------------------------------------------------------------------------- Total earning assets 751,769 35,703 6.35 682,092 28,175 5.52 Nonearning assets: Cash and due from banks 28,921 27,144 Premises and equipment, net 12,506 11,252 Bank owned life insurance 11,702 11,240 Goodwill and other intangibles 5,287 5,525 Other assets 23,067 22,231 Assets related to discontinued 6,164 operations 233 Allowance for loan losses (6,265) (5,996) - ----------------------------------------------------------------------------------------------------------------------- Total assets $ 827,220 $ 759,652 - ----------------------------------------------------------------------------------------------------------------------- Liabilities And Shareholders' Equity (1) Interest-bearing liabilities: Interest-bearing demand deposits $ 71,612 $ 1,282 2.39% $ 81,150 $ 1,071 1.76% Savings deposits 22,444 420 2.50 25,948 320 1.65 Time deposits of $100 or more 50,909 1,778 4.67 45,825 1,053 3.07 Other time deposits 30,551 977 4.28 36,717 842 3.07 - ----------------------------------------------------------------------------------------------------------------------- Total interest-bearing deposits 175,516 4,457 3.40 189,640 3,286 2.32 Short-term borrowings 166 5 4.03 166 3 2.42 Subordinated debentures 3,700 148 5.35 3,700 148 5.35 - ----------------------------------------------------------------------------------------------------------------------- Total interest-bearing liabilities 179,382 4,610 3.44 193,506 3,437 2.37 Noninterest-bearing liabilities: Demand deposits 99,104 100,049 Accounts and drafts payable 462,314 386,097 Other liabilities 7,575 7,156 Liabilities related to discontinued operations 662 1,872 - ----------------------------------------------------------------------------------------------------------------------- Total liabilities 749,037 688,680 Shareholders' equity 78,183 70,972 Total liabilities and shareholders' equity $ 827,220 $ 759,652 - ----------------------------------------------------------------------------------------------------------------------- Net interest income $ 31,093 $ 24,738 Interest spread 2.91% 3.15% Net interest margin 5.53 4.85 ======================================================================================================================= 1. Balances shown are daily averages. 2. For purposes of these computations, nonaccrual loans are included in the average loan amounts outstanding. Interest on nonaccrual loans is recorded when received as discussed further in Note 1 to the Company's 2005 Consolidated Financial Statements, filed with the Company's 2005 Annual Report on Form 10-K. 3. Interest income on loans includes net loan fees of $164,000 and $113,000 for the First Nine Months of 2006 and 2005, respectively. 4. Interest income is presented on a tax-equivalent basis assuming a tax rate of 35%. The tax-equivalent adjustment was approximately $1,122,000 and $655,000 for the First Nine Months of 2006 and 2005, respectively. 5. For purposes of these computations, yields on investment securities are computed as interest income divided by the average amortized cost of the investments. -18-

Analysis of Net Interest Income Changes The following table presents the changes in interest income and expense between periods due to changes in volume and interest rates. That portion of the change in interest attributable to the combined rate/volume variance has been allocated to rate and volume changes in proportion to the absolute dollar amounts of the change in each. Third Quarter 2006 Over 2005 ============================= (In Thousands) Volume Rate Total ================================================================================ Increase (decrease) in interest income: Loans (1,2): Taxable $ 233 $ 855 $ 1,088 Tax-exempt (3) 8 2 10 Debt and equity securities: Taxable (54) 99 45 Tax-exempt (3) 431 13 444 Federal funds sold and other short-term investments 359 651 1,010 - -------------------------------------------------------------------------------- Total interest income 977 1,620 2,597 - -------------------------------------------------------------------------------- Interest expense on: Interest-bearing demand deposits (55) 129 74 Savings deposits (16) 82 66 Time deposits of $100 or more 199 194 393 Other time deposits (76) 95 19 Short-term borrowings 1 -- 1 Subordinated debentures -- -- -- Total interest expense 53 500 553 - -------------------------------------------------------------------------------- Net interest income $ 924 $ 1,120 $ 2,044 ================================================================================ 1. Average balances include nonaccrual loans. 2. Interest income includes net loan fees. 3. Interest income is presented on a tax-equivalent basis assuming a tax rate of 35%. First Nine Months 2006 Over 2005 =============================== (In Thousands) Volume Rate Total ================================================================================ Increase (decrease) in interest income: Loans (1,2): Taxable $ 852 $ 2,697 $ 3,549 Tax-exempt (3) 21 12 33 Debt and equity securities: Taxable (72) 279 207 Tax-exempt (3) 1,262 35 1,297 Federal funds sold and other short-term investments 660 1,782 2,442 - -------------------------------------------------------------------------------- Total interest income 2,723 4,805 7,528 - -------------------------------------------------------------------------------- Interest expense on: Interest-bearing demand deposits (137) 348 211 Savings deposits (48) 148 100 Time deposits of $100 or more 128 597 725 Other time deposits (158) 293 135 Short-term borrowings -- 2 2 Subordinated debentures -- -- -- Total interest expense (215) 1,388 1,173 - -------------------------------------------------------------------------------- Net interest income $ 2,938 $ 3,417 $ 6,355 ================================================================================ 4. Average balances include nonaccrual loans. 5. Interest income includes net loan fees. 6. Interest income is presented on a tax-equivalent basis assuming a tax rate of 35%. -19-

Provision and Allowance for Loan Losses An important determinant of the Company's operating results is the provision for loan losses and the level of loans charged off. There was a $200,000 and $225,000 provision made for loan losses during the Third Quarter of 2006 and the Third Quarter of 2005, respectively. There was a $500,000 and $625,000 provision made for loan losses during the First Nine Months of 2006 and the First Nine Months of 2005, respectively. As discussed below, the Company continually analyzes the outstanding loan portfolio based on the performance, financial condition and collateralization of the credits. There was $583,000 of net loan charge-offs in the Third Quarter of 2006 and $3,000 of recoveries in the Third Quarter 2005. There was $855,000 of net loan charge-offs in the First Nine Months of 2006 and $425,000 in the First Nine Months 2005. The allowance for loan losses at September 30, 2006 was $5,929,000 and at December 31, 2005 was $6,284,000. The ratio of allowance for loan losses to total loans outstanding at September 30, 2006 was 1.14%, compared to 1.19% at December 31, 2005. Nonperforming loans were $954,000 or .18% of total loans at September 30, 2006 compared to $1,464,000 or .28% of total loans at December 31, 2005. At September 30, 2006, nonperforming loans, which are also considered impaired, consisted of $954,000 in non-accrual loans as shown in the following table. This total consists of three loans that relate to businesses that are for sale or are in process of liquidation. Nonperforming loans at December 31, 2005 consisted of $983,000 in non-accrual loans and $481,000 in loans that were still accruing interest although past due for over 90 days. Total nonperforming loans decreased $180,000 from September 30, 2005 to September 30, 2006. In addition to the nonperforming loans discussed above, at September 30, 2006, approximately $5,868,000 of loans not included in the table below were identified by management as having potential credit problems. They may also be classified for regulatory purposes. These loans are excluded from the table due to the fact they are current under the original terms of the loans; however, circumstances have raised doubts as to the ability of the borrowers to comply with the current loan repayment terms. Included in this balance is $3,795,000 related to one borrower that was renegotiated several years ago and although current under the new terms of the contract, management believes, due to the financial condition of the borrower, there still remains risk as to the collectability of all amounts under the loan agreement. The remaining loans are closely monitored by management and have specific reserves established for the estimated loss exposure. The allowance for loan losses has been established and is maintained to absorb probable losses in the loan portfolio. An ongoing assessment of risk of loss is performed to determine if the current balance of the allowance is adequate to cover probable losses in the portfolio. A charge or credit is made to expense to cover any deficiency or reduce any excess. The current methodology employed to determine the appropriate allowance consists of two components, specific and general. The Company develops specific valuation allowances on commercial, real estate, and construction loans based on individual review of these loans and an estimate of the borrower's ability to repay the loan given the availability of collateral, other sources of cash flow and collection options available. The general component relates to all other loans, which are evaluated based on loan grade. The loan grade assigned to each loan is typically evaluated on an annual basis, unless circumstances require interim evaluation. The Company assigns a reserve amount consistent with each loan's rating category. The reserve amount is based on derived loss experience over prescribed periods. In addition to the amounts derived from the loan grades, a portion is added to the general reserve to take into account other factors including national and local economic conditions, downturns in specific industries including loss in collateral value, trends in credit quality at the Company and the banking industry, and trends in risk rating changes. As part of their examination process, federal and state agencies review the Company's methodology for maintaining the allowance for loan losses and the balance in the account. These agencies may require the Company to increase the allowance for loan losses based on their judgments and interpretations about information available to them at the time of their examination. -20-

Summary of Asset Quality Three Months Ended Nine Months Ended September 30 September 30 ======================= ======================= (Dollars in Thousands) 2006 2005 2006 2005 ================================================================================================================ Allowance at beginning of period $ 6,312 $ 6,009 $ 6,284 $ 6,037 Provision charged to expense 200 225 500 625 Loans charged off 586 -- 864 448 Recoveries on loans previously charged off 3 3 9 23 - ---------------------------------------------------------------------------------------------------------------- Net loans charged-off (recovered) 583 (3) 855 425 Allowance at end of period $ 5,929 $ 6,237 $ 5,929 $ 6,237 - ---------------------------------------------------------------------------------------------------------------- Loans outstanding: Average $ 527,784 $ 513,096 $ 528,250 $ 509,953 September 30 520,748 518,792 520,748 518,792 Ratio of allowance for loan losses to loans outstanding: Average 1.12% 1.22% 1.12% 1.22% September 30 1.14 1.20 1.14% 1.20 Nonperforming loans: Nonaccrual loans $ 954 $ 1,111 $ 954 $ 1,111 Loans past due 90 days or more -- 23 -- 23 Renegotiated loans -- -- -- -- - ---------------------------------------------------------------------------------------------------------------- Total non performing loans $ 954 $ 1,134 $ 954 $ 1,134 Foreclosed assets -- -- -- -- - ---------------------------------------------------------------------------------------------------------------- Nonperforming loans as percentage of average loans .18% .22% .18% .22% - ---------------------------------------------------------------------------------------------------------------- The Bank had no properties carried as other real estate owned as of September 30, 2006 and 2005 and December 31, 2005. Operating Expense from Continuing Operations Total operating expense for the Third Quarter of 2006 increased $1,877,000 or 14% to $15,021,000 compared to the Third Quarter of 2005 due primarily to expenses related to the 13% growth in processing activity. Total operating expense for the First Nine Months of 2006 increased $4,404,000 or 11% to $43,174,000 compared to the First Nine Months of 2005 due primarily to expenses related to the 13% growth in processing activity. Salaries and benefits expense for the Third Quarter of 2006 increased $1,536,000 or 16% to $11,136,000 compared to the Third Quarter of 2005 and increased $3,393,000 or 12% to $31,673,000 for the First Nine Months of 2006 compared to the First Nine Months of 2005 primarily due to additional headcount to service new transaction business, an increase in pension expense for both of the Company's plans and an increase in bonuses related to the earnings increase over the comparable period last year. Occupancy expense for the Third Quarter of 2006 increased $23,000 or 5% to $522,000 from the Third Quarter of 2005 and increased $19,000 or 1% from the First Nine Months of 2005 compared to the First Nine Months of 2006. Equipment expense for the Third Quarter of 2006 increased $16,000 or 2% compared to the Third Quarter of 2005 due to additional depreciation on asset purchases and decreased $18,000 from the First Nine Months of 2005 compared to the First Nine Months of 2006 mainly due to the amortization of internally developed software that was fully amortized in the Fourth Quarter of 2005. Amortization of intangible assets for the Third Quarter and the First Nine Months of 2006 increased $28,000 or 67% compared to the Third Quarter of 2005 and 22% compared to the First Nine Months of 2005 due to the amortization of the customer list acquired with the NTransit purchase in July, 2006. Other operating expense for the Third Quarter of 2006 increased $274,000, or 12% compared to the Third Quarter of 2005 and increased $982,000 or 15% from the First Nine Months of 2005 compared to the First Nine Months of 2006. The increases were due to increases in outside services expense and expenses related to the Bank's 100th year anniversary celebrations. Income tax expense for the Third Quarter of 2006 increased $535,000 or 32% compared to the Third Quarter of 2005 and increased $1,851,000 or 41% for the First Nine Months of 2006 compared to the First Nine Months of 2005. The effective tax rate was 35.7% and 33.8% for the Third Quarter of 2006 and for the Third Quarter of 2005, respectively, and was 35.4% and 34.0% for the First Nine Months of 2006 and 2005, respectively. The increase in the effective tax rate was due to an increase in the Company's federal statutory tax rate in 2006 to 35% versus 34% in 2005. -21-

Financial Condition Total assets at September 30, 2006 were $886,414,000, an increase of $67,716,000, or 8% from December 31, 2005. The most significant changes in asset balances during this period was an increase of $68,176,000 or 57% in federal funds sold and other short-term investments. Changes in federal funds sold and other short-term investments reflect the Company's daily liquidity position and are affected by the changes in the other asset balances, deposits and accounts and draft payable balances. Total liabilities were $802,441,000, an increase of $59,024,000, or 8% from December 31, 2005. Total deposits at September 30, 2006 were $275,188,000, a decrease of $11,810,000 or 4%. Accounts and drafts payable were $514,193,000, an increase of $68,382,000 or 15%. Total shareholders' equity at September 30, 2006 was $83,973,000, an increase of $8,692,000 or 12% increase from December 31, 2005. Deposits in the First Nine Months of 2006 decreased as customers moved funds into other higher-yielding investments. Accounts and drafts payable will fluctuate from period-end to period-end due to the payment processing cycle, which results in lower balances on days when checks clear and higher balances on days when checks are issued. For this reason, average balances are a more meaningful measure of accounts and drafts payable (for average balances refer to the tables under the "Distribution of Assets, Liabilities and Stockholders' Equity; Interest Rate and Interest Differential" section of this report). The increase in total shareholders' equity for the First Nine Months of 2006 resulted from net income of $11,371,000, cash received on the exercise of stock options of $330,000, $64,000 tax benefit on stock and option awards, $159,000 from the amortization of stock bonus awards, an increase in other comprehensive income of $307,000, offset by dividends paid of $2,669,000 ($.16 per share) and the purchase of common shares for treasury of $870,000. Liquidity and Capital Resources The balance of liquid assets consists of cash and cash equivalents, which include cash and due from banks, federal funds sold and money market funds, and was $219,840,000 at September 30, 2006, an increase of $70,148,000 or 47% from December 31, 2005. At September 30, 2006, these assets represented 25% of total assets. These funds are the Company's and its subsidiaries' primary source of liquidity to meet future expected and unexpected loan demand, depositor withdrawals or reductions in accounts and drafts payable. Secondary sources of liquidity include the investment portfolio and borrowing lines. Total investment in securities was $87,871,000 at September 30, 2006, a decrease of $6,988,000 from December 31, 2005. These assets represented 10% of total assets at September 30, 2006. Of this total, 75% were state and political subdivision securities, 19% were U.S. Treasury securities, 5% were U.S. government agencies and 1% was other securities. Of the total portfolio, 20% mature in one year, 22% mature in one to five years, and 58% mature in five or more years. During the Third Quarter of 2006 the Company did not sell any securities. The Bank has unsecured lines of credit at correspondent banks to purchase federal funds up to a maximum of $29,000,000. Additionally, the Bank maintains a line of credit at unaffiliated financial institutions in the maximum amount of $57,962,000 collateralized by U.S. Treasury and agency securities and commercial and residential mortgage loans. The deposits of the Company's banking subsidiary have historically been stable, consisting of a sizable volume of core deposits related to customers that utilize other commercial products of the Bank. The accounts and drafts payable generated by the Company has also historically been a stable source of funds. Net cash flows provided by operating activities were $12,870,000 for the First Nine Months of 2006 compared with $9,762,000 for the First Nine Months of 2005. This increase is attributable to the increase in net income from continuing operations of $2,822,000, the absence of a gain on sales of investment securities in 2006 compared to $547,000 in 2005, offset by a decrease of $1,431,000 in operating activities related to discontinued operations plus the other normal fluctuations in asset and liability accounts. Net cash flows from investing and financing activities fluctuate greatly as the Company actively manages its investment and loan portfolios. Customer activity influences changes in deposits and accounts and drafts payable balances. Other causes for the changes in these account balances are discussed earlier in this report. Due to the daily fluctuations in these account balances, the analysis of changes in average balances, also discussed earlier in this report, can be more indicative of underlying activity than the period-end balances used in the statements of cash flows. Management anticipates that cash and cash equivalents, maturing investments and cash from operations will continue to be sufficient to fund the Company's operations and capital expenditures in 2006. -22-

The Company faces market risk to the extent that its net interest income and fair market value of equity are affected by changes in market interest rates. For information regarding the market risk of the Company's financial instruments, see Item 3. "QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK". Risk-based capital guidelines require the Company to meet a minimum total capital ratio of 8.0% of which at least 4.0% must consist of Tier 1 capital. Tier 1 capital generally consists of (a) common shareholders' equity (excluding the unrealized market value adjustments on the available-for-sale securities), (b) qualifying perpetual preferred stock and related surplus subject to certain limitations specified by the FDIC, (c) minority interests in the equity accounts of consolidated subsidiaries less (d) goodwill, (e) mortgage servicing rights within certain limits and (f) any other intangible assets and investments in subsidiaries that the FDIC determines should be deducted from Tier 1 capital. The FDIC also requires a minimum leverage ratio of 3.0%, defined as the ratio of Tier 1 capital less purchased mortgage servicing rights to total assets, for banking organizations deemed the strongest and most highly rated by banking regulators. A higher minimum leverage ratio is required of less highly-rated banking organizations. Total capital, a measure of capital adequacy, includes Tier 1 capital, allowance for loan losses, and debt considered equity for regulatory capital purposes. The Company and the Bank continue to exceed all regulatory capital requirements, as evidenced by the following capital amounts and ratios at September 30, 2006 and December 31, 2005: September 30, 2006 (Dollars In Thousands) Amount Ratio ================================================================================ Total capital (to risk-weighted assets) Cass Information Systems, Inc. $ 85,067 13.32% Cass Commercial Bank 42,933 14.92 Tier I capital (to risk-weighted assets) Cass Information Systems, Inc. $ 75,438 11.81% Cass Commercial Bank 38,699 13.45 Tier I capital (to average assets) Cass Information Systems, Inc. $ 75,438 8.91% Cass Commercial Bank 38,699 11.58 ================================================================================ December 31, 2005 (Dollars In Thousands) Amount Ratio ================================================================================ Total capital (to risk-weighted assets) Cass Information Systems, Inc. $ 80,066 12.80% Cass Commercial Bank 42,597 14.64 Tier I capital (to risk-weighted assets) Cass Information Systems, Inc. $ 70,082 11.21% Cass Commercial Bank 38,251 13.15 Tier I capital (to average assets) Cass Information Systems, Inc. $ 70,082 8.52% Cass Commercial Bank 38,251 11.16 ================================================================================ Stock Dividend The Company paid a 50% stock dividend on September 15, 2006, to shareholders of record at the close of trading September 1, 2006. Shareholders received one additional share of the Company's stock for each two shares owned. Inflation The Company's assets and liabilities are primarily monetary, consisting of cash, cash equivalents, securities, loans, payables and deposits. Monetary assets and liabilities are those that can be converted into a fixed number of dollars. The Company's consolidated balance sheet reflects a net positive monetary position (monetary assets exceed monetary liabilities). During periods of inflation, the holding of a net positive monetary position will result in an overall decline in the purchasing power of a company. Management believes that replacement costs of equipment, furniture, and leasehold improvements will not materially affect operations. The rate of inflation does affect certain expenses, such as those for employee compensation, which may not be readily recoverable in the price of the Company's services. -23-

Impact of New Accounting Pronouncements In November 2005, the Financial Accounting Standards Board ("FASB") issued FASB Staff Position ("FSP") FAS 115-1 and 124-1, "The Meaning of Other-Than-Temporary Impairment and Its Application to Certain Investments." The guidance addresses the determination of when an investment is considered impaired, whether that impairment is other than temporary, and the measurement of an impairment loss. The FSP also includes accounting considerations subsequent to the recognition of an other-than-temporary impairment and requires certain disclosures about unrealized losses that have not been recognized as other-than-temporary impairments. The guidance in this FSP amends FASB Statement No. 115, "Accounting for Certain Investments in Debt and Equity Securities," and adds a footnote to APB Opinion No. 18, "The Equity Method of Accounting for Investments in Common Stock." The guidance in this FSP nullifies certain requirements of the Emerging Issues Task Force ("EITF"), Issue No. 03-1, "The Meaning of Other-Than-Temporary Impairment and Its Application to Certain Investments," and supersedes EITF Abstracts, Topic D-44, "Recognition of Other-Than-Temporary Impairment upon the Planned Sale of a Security Whose Cost Exceeds Fair Value." The Company applied this guidance effective January 1, 2006 and there was no material impact on its consolidated financial statements. In December 2004, the FASB issued SFAS No. 123 (Revised 2004), "Share-Based Payment". This Statement addresses the accounting for transactions in which an entity exchanges its equity instruments for goods or services. The Statement eliminates the ability to account for share-based compensation transactions using APB Opinion No. 25, "Accounting for Stock Issued to Employees", and generally requires instead that such transactions be accounted for using a fair-value based method. For public entities, the cost of employee services received in exchange for an award of equity instruments, such as stock options, will be measured based on the grant-date fair value of those instruments, and that cost will be recognized over the period during which an employee is required to provide service in exchange for the award (usually the vesting period). This Statement was adopted by the Company on January 1, 2006. The implementation of SFAS No. 123R did not have a material effect on the Company's financial condition or results of operations. See Note 10 to the financial statements. In May 2005, the FASB issued SFAS No. 154 "Accounting Changes and Error Corrections" as a replacement of APB Opinion No. 20 and FASB Statement No. 3. This Statement applies to all voluntary changes in accounting principles and changes required by an accounting pronouncement in the unusual instance that the pronouncement does not include specific transition provisions. This Statement carries forward without change the guidance contained in APB Opinion No. 20 for reporting the correction of an error in previously issued financial statements and a change in accounting estimate. This Statement also carries forward the guidance in APB Opinion No. 20 requiring justification of a change in accounting principle on the basis of preferability. This Statement was adopted by the Company on January 1, 2006 and there was no material impact on its consolidated financial statements. In June 2006, the FASB issued FASB Interpretation No. 48 "Accounting for Uncertainty in Income Taxes", an Interpretation of SFAS No. 109 "Accounting for Income Taxes". FASB Interpretation No. 48 clarifies the accounting for uncertainty in income taxes in financial statements and prescribes a recognition threshold and measurement attribute for financial statement recognition and measurement of a tax position taken or expected to be taken. The Interpretation also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. The FASB Interpretation is effective for fiscal years beginning after December 15, 2006. The Company is currently evaluating the requirements of FASB Interpretation No. 48 to determine the impact on its financial condition and results of operations. In September 2006, the FASB issued Statement No. 157, "Fair Value Measurements" ("SFAS No. 157"). SFAS No. 157 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles and expands disclosures about fair value measurements. It applies under other accounting pronouncements that require or permit fair value measurements; therefore, it does not require any new fair value measurements. This statement is effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. The company is currently assessing the impact of SFAS No. 157 on its financial statements. In September 2006, the FASB issued Statement No. 158, "Employers' Accounting for Defined Benefit Pension and Other Postretirement Plans - an amendment of FASB Statements No. 87, 88, 106, and 132(R)" ("SFAS No. 158"). SFAS No. 158 requires companies to recognize the overfunded or underfunded status of a defined benefit postretirement plan as an asset or liability in its statement of financial position and to recognize changes in that funded status in the year in which the changes occur through comprehensive income. The funded status is measured as the difference between the fair value of the plan assets and the benefit obligation as of the date of its fiscal year-end. Additional footnote disclosures will also be required. This statement is effective for fiscal years ending after December 15, 2006. The Company is currently assessing the impact of SFAS No. 158 on its financial statements. In September 2006, the SEC issued Staff Accounting Bulletin No. 108, "Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements"("SAB No. 108"). SAB No. 108 provides interpretive guidance on the consideration of the effects of prior year misstatements in quantifying current year misstatements for the purpose of a materiality assessment. This statement is effective for fiscal years ending after November 15, 2006. The company is currently assessing the impact of SAB No. 108 on its financial statements. -24-

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK As described in the Company's Annual Report on Form 10-K for the year ended December 31, 2005, the Company manages its interest rate risk through measurement techniques that include gap analysis and a simulation model. As part of the risk management process, asset/liability management policies are established and monitored by management. The policy objective is to limit the change in annualized net interest income to 15% from an immediate and sustained parallel change in interest rates of 200 basis points. Based on the Company's most recent evaluation, management does not believe the Company's risk position at September 30, 2006 has changed materially from that at December 31, 2005. ITEM 4. CONTROLS AND PROCEDURES The Company maintains disclosure controls and procedures designed to ensure that the information it is required to disclose in the reports it files with the Securities and Exchange Commission ("SEC") is recorded, processed, summarized and reported to management, including the Chief Executive Officer and Principal Financial Officer, within the time periods specified in the rules of the SEC. The Company's Chief Executive Officer and Principal Financial Officer have evaluated the Company's disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of September 30, 2006 and based on their evaluation, believe that, as of September 30, 2006, these controls and procedures were effective at the reasonable assurance level to ensure that the Company is able to collect, process and disclose the information it is required to disclose in the reports it files with the SEC within the required time periods. There were no changes in the Third Quarter of 2006 in the Company's internal control over financial reporting identified by the Chief Executive Officer and Principal Financial Officer in connection with their evaluation that materially affected or are reasonably likely to materially affect the Company's internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended). -25-

PART II. OTHER INFORMATION ITEM 1. LEGAL PROCEEDINGS The Company and its subsidiaries are not involved in any pending proceedings other than ordinary routine litigation incidental to its businesses. Management believes none of these proceedings, if determined adversely, would have a material effect on the business or financial conditions of the Company or its subsidiaries. ITEM 1A. RISK FACTORS There have been no material changes from the risk factors as previously disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2005. ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS The Company maintains a treasury stock buyback program pursuant to which the Board of Directors authorized the repurchase of up to 150,000 shares of the Company's common stock effective as of April 18, 2006. The Company did not repurchase any shares during the three months ended September 30, 2006. Repurchases are made in the open market or through negotiated transactions from time to time depending on market conditions. The information contained in Note 5 to the financial statements filed with this report is incorporated herein by reference. ITEM 3. DEFAULTS UPON SENIOR SECURITIES None ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS None ITEM 5. OTHER INFORMATION None ITEM 6. EXHIBITS Exhibit 3.1 Articles of Merger of Cass Commercial Corporation. Exhibit 31.1 Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Exhibit 31.2 Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Exhibit 32.1 Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. Exhibit 32.2 Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. -26-

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. CASS INFORMATION SYSTEMS, INC. DATE: November 20, 2006 By /s/ Lawrence A. Collett ------------------------------------- Lawrence A. Collett Chairman and Chief Executive Officer (Principal Executive Officer) DATE: November 20, 2006 By /s/ P. Stephen Appelbaum ------------------------------------- P. Stephen Appelbaum Chief Financial Officer (Principal Financial and Accounting Officer) -27-

                                                                     Exhibit 3.1

                               ARTICLES OF MERGER
                         (Pursuant to ss. 351.447 RSMo.)

                         Cass Information Systems, Inc.       FILED
                                   merged into                JAN 9 2001
                           Cass Commercial Corporation        Matt Blunt
                                                              SECRETARY OF STATE
HONORABLE REBECCA MCDOWELL COOK
SECRETARY OF STATE
STATE OF MISSOURI
CORPORATIONS DIVISION
P.O. BOX 778
JEFFERSON CITY, MISSOURI 65102

      Pursuant to the provisions of the General and Business Corporation Law of
Missouri, the undersigned corporations certify the following:

      1. Cass Commercial Corporation, a Missouri corporation ("Parent"), and
Cass Information Systems, Inc., a Missouri corporation ("Subsidiary") which is a
wholly-owned subsidiary of Parent, are hereby merged (the "Merger"), and Cass
Commercial Corporation, the Parent, is the surviving corporation.

      2. The Board of Directors of Parent, Cass Commercial Corporation, met on
December 19, 2000 and by resolutions adopted by a majority vote of the members
of such board approved the following Plan of Merger (the "Plan of Merger"):

                                 PLAN OF MERGER

      That Cass Commercial Corporation, a Missouri corporation, and its
      wholly-owned subsidiary, Cass Information Systems, Inc., a Missouri
      corporation, shall merge pursuant to Section 351.447 of the Revised
      Statues of Missouri whereby Cass Information Systems, Inc. shall merge
      into Cass Commercial Corporation which will be the surviving corporation
      and which will assume all the obligations of Cass Information Systems,
      Inc. All of the property rights, privileges, leases and patents of Cass
      Information Systems, Inc. are to be transferred to and become the property
      of Cass Commercial Corporation, the survivor. The officers and board of
      directors of the above named corporations are authorized to execute all
      deeds, assignments and documents of every nature which may be needed to
      effectuate a full and complete transfer of ownership. The officers and
      board of directors of Cass Commercial Corporation shall continue in office
      until their successors are duly elected and qualified under the provisions
      of the bylaws of Cass Commercial Corporation, the surviving corporation.

      In accordance with Section 351.447 of the Revised Statutes of Missouri, in
      connection with and contemporaneous to the above-described merger, Cass
      Commercial Corporation, the surviving corporation, shall change its
      corporate name to Cass Information Systems, Inc., such change of name
      constituting an amendment to the Articles of Incorporation of Cass
      Commercial Corporation, the survivor, as follows:

Article One of the Articles of Incorporation of Cass Commercial Corporation is amended in its entirety to read as follows: The name of the corporation shall be Cass Information Systems, Inc. 3. The resolutions of the Board of Directors of Parent approving the Plan of Merger are as follows: RESOLVED, that the Plan of Merger attached hereto and incorporated herein is hereby approved and adopted in accordance with and pursuant to Section 351.447 RSMo. FURTHER RESOLVED, that the officers of the Corporation are hereby authorized and directed to execute all documents, make all filings, provide all notices, obtain all consents and approvals and otherwise do all things necessary or required to effect the transactions contemplated hereby, including, without limitation, executing and filing Articles of Merger with the Missouri Secretary of State; and FURTHER RESOLVED, that all acts done by the directors and officers of the Corporation in furtherance of the merger approved and the resolutions adopted hereby, including, without limitation, the execution and filing with the Missouri Secretary of State by the officers of the Corporation of all required documents, including, without limitation, Articles of Merger, are hereby approved, confirmed and ratified. 4. The Articles of Incorporation of Parent, the survivor, are amended as follows (the "Name Change"): "Article One of the Articles of Incorporation of Cass Commercial Corporation is amended in its entirety to read as follows: The name of the corporation shall be Cass Information Systems, Inc." 5. The Plan of Merger has been adopted pursuant to Section 351.447 RSMo. 6. At the time of the adoption of the resolutions above referred to, and at the present time, one hundred percent (100%), of the outstanding shares of Subsidiary were and are wholly owned by Parent. The parent corporation, Parent, is in compliance with the ninety percent (90%) ownership requirement of Section 351.447, RSMo., and will maintain at least ninety percent (90%) ownership of Subsidiary until the issuance of the Certificate of Merger by the Secretary of State of Missouri. 7. The effective date of the Merger and the Name Change shall be the time when a Certificate of Merger has been executed and issued by the Secretary of State of Missouri. -2-

IN WITNESS WHEREOF, these Articles of Merger have been executed in duplicate by the aforementioned corporation as of the day and year hereafter acknowledged. CORPORATE SEAL Cass Commercial Corporation By: /s/ Lawrence A. Collett --------------------------------------- Name: Lawrence A. Collett Title: Chairman and Chief Executive Officer Date: December 31, 2000 Attest: /s/ Eric H. Brunngraber ---------------------------- Name: Eric H. Brunngraber Title: Secretary STATE OF MISSOURI ) ) SS: COUNTY OF ST. LOUIS ) I, Joyce Blake, a notary public, do hereby certify that on this 21st day of December, 2000, personally appeared before me Lawrence A. Collett, who, being by me first duly swarn, declared that he is the Chairman and Chief Executive Officer of Cass Commercial Corporation, that he signed the foregoing document as Chairman and Chief Executive Officer of the Corporation, and that the statements therein contained are true. /s/ Joyce Blake ------------------------------- Notary Public (NOTARIAL SEAL) My Commission Expires: 12-6-02 - ----------------------------------- JOYCE BLAKE Notary Public-Notary Seal STATE OF MISSOURI St. Louis County My Commission Expires: Dec. 6, 2002 - ----------------------------------- -3-

                                                                    Exhibit 31.1

                                 CERTIFICATIONS

I, Lawrence A. Collett, Chairman and Chief Executive Officer of Cass Information
Systems, Inc., certify that:

1.    I have reviewed this quarterly report on Form 10-Q/A of Cass Information
      Systems, Inc.;

2.    Based on my knowledge, this report does not contain any untrue statement
      of a material fact or omit to state a material fact necessary to make the
      statements made, in light of the circumstances under which such statements
      were made, not misleading with respect to the period covered by this
      report;

3.    Based on my knowledge, the financial statements, and other financial
      information included in this report, fairly present in all material
      respects the financial condition, results of operations and cash flows of
      the registrant as of, and for, the periods presented in this report;

4.    The registrant's other certifying officer and I are responsible for
      establishing and maintaining disclosure controls and procedures (as
      defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
      control over financial reporting (as defined in Exchange Act Rules
      13a-15(f) and 15d-15(f)) for the registrant and have:

      (a)   Designed such disclosure controls and procedures, or caused such
            disclosure controls and procedures to be designed under our
            supervision, to ensure that material information relating to the
            registrant, including its consolidated subsidiaries, is made known
            to us by others within those entities, particularly during the
            period in which this report is being prepared;

      (b)   Designed such internal control over financial reporting, or caused
            such internal control over financial reporting to be designed under
            our supervision, to provide reasonable assurance regarding the
            reliability of financial reporting and the preparation of financial
            statements for external purposes in accordance with generally
            accepted accounting principles;

      (c)   Evaluated the effectiveness of the registrant's disclosure controls
            and procedures and presented in this report our conclusions about
            the effectiveness of the disclosure controls and procedures, as of
            the end of the period covered by this report based on such
            evaluation; and

      (d)   Disclosed in this report any change in the registrant's internal
            control over financial reporting that occurred during the
            registrant's most recent fiscal quarter (the registrant's fourth
            fiscal quarter in the case of an annual report) that has materially
            affected, or is reasonably likely to materially affect, the
            registrant's internal control over financial reporting; and

5.    The registrant's other certifying officer and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting,
      to the registrant's auditors and the audit committee of the registrant's
      board of directors (or persons performing the equivalent functions):

      (a)   All significant deficiencies and material weaknesses in the design
            or operation of internal control over financial reporting which are
            reasonably likely to adversely affect the registrant's ability to
            record, process, summarize and report financial information; and

      (b)   Any fraud, whether or not material, that involves management or
            other employees who have a significant role in the registrant's
            internal control over financial reporting.

Date: November 20, 2006

                                                   /s/ Lawrence A. Collett
                                                   -----------------------------
                                                   Lawrence A. Collett
                                                   Chairman and Chief Executive
                                                   Officer
                                                   (Principal Executive Officer)


                                      -31-
                                                                    Exhibit 31.2

                                 CERTIFICATIONS

I P. Stephen Appelbaum, Chief Financial Officer of Cass Information Systems,
Inc., certify that:

1.    I have reviewed this quarterly report on Form 10-Q/A of Cass Information
      Systems, Inc.;

2.    Based on my knowledge, this report does not contain any untrue statement
      of a material fact or omit to state a material fact necessary to make the
      statements made, in light of the circumstances under which such statements
      were made, not misleading with respect to the period covered by this
      report;

3.    Based on my knowledge, the financial statements, and other financial
      information included in this report, fairly present in all material
      respects the financial condition, results of operations and cash flows of
      the registrant as of, and for, the periods presented in this report;

4.    The registrant's other certifying officer and I are responsible for
      establishing and maintaining disclosure controls and procedures (as
      defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal
      control over financial reporting (as defined in Exchange Act Rules
      13a-15(f) and 15d-15(f)) for the registrant and have:

      (a)   Designed such disclosure controls and procedures, or caused such
            disclosure controls and procedures to be designed under our
            supervision, to ensure that material information relating to the
            registrant, including its consolidated subsidiaries, is made known
            to us by others within those entities, particularly during the
            period in which this report is being prepared;

      (b)   Designed such internal control over financial reporting, or caused
            such internal control over financial reporting to be designed under
            our supervision, to provide reasonable assurance regarding the
            reliability of financial reporting and the preparation of financial
            statements for external purposes in accordance with generally
            accepted accounting principles;

      (c)   Evaluated the effectiveness of the registrant's disclosure controls
            and procedures and presented in this report our conclusions about
            the effectiveness of the disclosure controls and procedures, as of
            the end of the period covered by this report based on such
            evaluation; and

      (d)   Disclosed in this report any change in the registrant's internal
            control over financial reporting that occurred during the
            registrant's most recent fiscal quarter (the registrant's fourth
            fiscal quarter in the case of an annual report) that has materially
            affected, or is reasonably likely to materially affect, the
            registrant's internal control over financial reporting; and

5.    The registrant's other certifying officer and I have disclosed, based on
      our most recent evaluation of internal control over financial reporting,
      to the registrant's auditors and the audit committee of the registrant's
      board of directors (or persons performing the equivalent functions):

      (a)   All significant deficiencies and material weaknesses in the design
            or operation of internal control over financial reporting which are
            reasonably likely to adversely affect the registrant's ability to
            record, process, summarize and report financial information; and

      (b)   Any fraud, whether or not material, that involves management or
            other employees who have a significant role in the registrant's
            internal control over financial reporting.

Date: November 20, 2006

                                                       /s/ P. Stephen Appelbaum
                                                       -------------------------
                                                       P. Stephen Appelbaum
                                                       Chief Financial Officer
                                                       (Principal Financial and
                                                       Accounting Officer)


                                      -32-
                                                                    Exhibit 32.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Cass Information Systems, Inc. ("the
Company") on Form 10-Q/A for the period ended September 30, 2006, as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Lawrence A. Collett, Chairman and Chief Executive Officer of the Company,
certify, pursuant to 18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the
Sarbanes-Oxley Act of 2002, that:

      (1)   The Report fully complies with the requirements of section 13(a) or
            15(d) of the Securities Exchange Act of 1934; and

      (2)   The information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Company.


                                            /s/ Lawrence A. Collett
                                            ------------------------------------
                                            Lawrence A. Collett
                                            Chairman and Chief Executive Officer
                                            (Principal Executive Officer)
                                            November 20, 2006

A signed original of this written statement required by Section 906 has been
provided to Cass Information Systems, Inc. and will be retained by Cass
Information Systems, Inc. and furnished to the Securities and Exchange
Commission or its staff upon request.


                                      -33-
                                                                    Exhibit 32.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Cass Information Systems, Inc. ("the
Company") on Form 10-Q/A for the period ended September 30, 2006, as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I, P.
Stephen Appelbaum, Chief Financial Officer of the Company, certify, pursuant to
18 U.S.C. ss. 1350, as adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of
2002, that:

      (1)   The Report fully complies with the requirements of section 13(a) or
            15(d) of the Securities Exchange Act of 1934; and

      (2)   The information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Company.


                                                     /s/ P. Stephen Appelbaum
                                                     ---------------------------
                                                     P. Stephen Appelbaum
                                                     Chief Financial Officer
                                                     (Principal Financial and
                                                     Accounting Officer)
                                                     November 20, 2006

A signed original of this written statement required by Section 906 has been
provided to Cass Information Systems, Inc. and will be retained by Cass
Information Systems, Inc. and furnished to the Securities and Exchange
Commission or its staff upon request.


                                      -34-