Internet-Based System Helps Users Control Transportation Expenses

ST. LOUIS – Cass Information Systems, Inc. (NASDAQ: CASS), the nation's leading provider of freight and utility invoice payment, rating, auditing and information services, has launched CassPort™, an Internet technology application that allows users to more easily control transportation expenses.

CassPort™ is a Web-based portal into Cass Transportation Information Systems' Internet Reporting Services. It collects and organizes customer data and makes it accessible 24/7 via the Internet. By condensing data into one convenient display, CassPort™ eliminates the need to search through volumes of data. It can display key information at the summary level for a day, week, month or year, reducing the time required to access critical transportation and accounting information. The system's easy to use interface allows users to drill down into more detailed information as needed. CassPort™ is a standard feature provided to all Cass customers.

“Cass recognizes the importance of the Internet in today's business environment and is leading the marketplace in designing innovative and easy to use information delivery systems for customers,” said Jeff Thurston, vice president, financial technology. “While many companies allow customers to view and manipulate data over the Internet, we know of no competitor that provides the level of customization and metrics display available through CassPort™.”

Cass Introduces CassPort™

CassPort™ represents a significant upgrade to Cass' Internet Reporting Services. The company plans to continue to enhance and expand Internet-based services in the months ahead. To learn more about Cass, key http://www.cassinfo.com.

About Cass Information Systems

Cass has been a leading provider of payables services and information support systems to companies throughout North America since 1956. The company pays over $12 billion annually in freight and utility invoices on behalf of its customers from processing centers in St. Louis, Missouri, Columbus, Ohio and Boston, Massachusetts. The support of its bank subsidiary, Cass Commercial Bank, founded in 1906, makes the company unique in the industry.

Note to Investors

Certain matters set forth in this news release may contain forward-looking statements that are provided to assist in the understanding of anticipated future financial performance. However, such performance involves risks and uncertainties that my cause actual result to differ materially form those in such statements. For a discussion of certain factors that may cause such forward-looking statements to differ materially form the company's actual results, see the company's annual report on Form 10-K for the year ended December 31, 2003.

Contact: Eric H. Brunngraber, chief financial officer, Cass Information Systems, Inc., (314) 506-5502, ericbrunngraber@cassinfo.com, or Kenn Entringer at Casey Communications, Inc., (314) 962-0944.