Cass Information Systems, Inc. Declares 50% Stock Dividend in Addition to Regular Dividend.

ST. LOUIS -- The board of directors of Cass Information Systems, Inc. (NASDAQ:CASS), the nation's leading provider of freight, utility and telecom invoice payment, rating, auditing and information services, announced a 50% stock dividend payable to shareholders of record at the close of trading September 2, 2005.

Shareholders will receive one additional share of CASS stock for each two shares owned. No fractional shares will be issued. Shareholders will receive cash for any fractional shares owned based on the August 16, 2005 closing sale price of $47 per share, as reported by NASDAQ.

The stock dividend is the third declared by CASS within the past three years. The company previously declared a 10% stock dividend in February 2004 and a 5% stock dividend in December 2002.

In addition, CASS also declared a regular quarterly dividend of $0.21 per share payable September 15, 2005 to shareholders of record September 2, 2005. The September cash dividend will be paid on shares outstanding prior to the 50% stock dividend.

Thereafter, the company anticipates paying a $.16 per share dividend on the expanded number of shares, effectively increasing its dividend payout 14%. CASS has continuously paid regularly scheduled cash dividends since 1934.

"The stock dividend and increased dividend cash payout that will ultimately result reflect our optimism about the company," said Lawrence A. Collett, Cass chief executive officer and chairman. "We continue to be encouraged by our revenue growth, especially in our information processing businesses."

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 more than $14 billion annually in freight and utility invoices on behalf of its customers from processing centers in St. Louis, Mo., Columbus, Ohio, Boston, Mass. and Greenville, S.C. The support of its bank subsidiary, Cass Commercial Bank, founded in 1906, makes Cass Information Systems 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 may cause actual results to differ materially from those in such statements. For a discussion of certain factors that may cause such forward-looking statements to differ materially from the company's actual results, see the company's reports filed from time to time with the Securities and Exchange Commission including the company's annual report on Form 10-K for the year ended December 31, 2004.