UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                            SCHEDULE 14A INFORMATION

          Proxy Statement Pursuant to Section 14(a) of the Securities
                      Exchange Act of 1934 (Amendment No. )

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                         CASS INFORMATION SYSTEMS, INC.
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                (Name of Registrant as Specified In Its Charter)


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CASS INFORMATION SYSTEMS, INC. NOTICE OF ANNUAL MEETING OF SHAREHOLDERS To be held on April 19, 2004 TO THE SHAREHOLDERS: The Annual Meeting of Shareholders of Cass Information Systems, Inc. will be held at the offices of Cass Information Systems, Inc. located at 13001 Hollenberg Drive, Bridgeton, Missouri on Monday, April 19, 2004, at 11:00 a.m., for the following purposes: 1. To elect four Directors, each to serve for a three year term; 2. To act upon such other matters as may properly come before the meeting. The close of business on March 5, 2004 has been fixed as the record date for determining shareholders entitled to notice of and to vote at the Meeting. By Order of the Board of Directors, Eric H. Brunngraber Secretary March 17, 2004 Bridgeton, Missouri ALL SHAREHOLDERS ARE CORDIALLY INVITED TO ATTEND THE ANNUAL MEETING. WHETHER OR NOT YOU INTEND TO BE PRESENT, IT IS IMPORTANT THAT YOUR SHARES BE REPRESENTED AND VOTED AT THE ANNUAL MEETING. YOU CAN VOTE YOUR SHARES BY ONE OF THE FOLLOWING METHODS: VOTE OVER THE INTERNET OR BY TELEPHONE USING THE INSTRUCTIONS ON THE ENCLOSED PROXY CARD, OR MARK, SIGN, DATE AND PROMPTLY RETURN THE ENCLOSED PROXY CARD. THE PRESENCE, IN PERSON OR BY PROPERLY EXECUTED PROXY, OF A MAJORITY OF THE COMMON STOCK OUTSTANDING ON THE RECORD DATE IS NECESSARY TO CONSTITUTE A QUORUM AT THE ANNUAL MEETING.

CASS INFORMATION SYSTEMS, INC. 13001 Hollenberg Drive Bridgeton, Missouri 63044 PROXY STATEMENT Annual Meeting of Shareholders to be held April 19, 2004 This Proxy Statement is being furnished to the common shareholders of Cass Information Systems, Inc. (the "Company") on or about March 17, 2004 in connection with the solicitation of proxies on behalf of the Board of Directors of the Company for use at the annual meeting of shareholders (the "Annual Meeting") to be held on April 19, 2004 at the time and place and for the purposes set forth in the accompanying Notice of Annual Meeting, and at any adjournment or postponement of that meeting. Holders of shares of common stock, par value $.50 per share ("Shares" or the "Common Stock"), of the Company at its close of business on March 5, 2004 (the "Record Date") are entitled to receive notice of and vote at the Annual Meeting. On the Record Date, 3,679,452 shares of Common Stock were outstanding. Holders of record of Common Stock (the "Shareholders") are entitled to one vote per share of Common Stock they held of record on the Record Date on each matter that may properly come before the Annual Meeting. Company management ("Management"), and members of the Board of Directors (the "Board"), in the aggregate, directly or indirectly controlled approximately 25.90% of the Common Stock outstanding on the Record Date. Shareholders of record on the Record Date are entitled to cast their votes in person or by properly executed proxy at the Annual Meeting. The presence, in person or by properly executed proxy, of a majority of the Common Stock outstanding on the Record Date is necessary to constitute a quorum at the Annual Meeting. If a quorum is not present at the time the Annual Meeting is convened, the Company may adjourn or postpone the Annual Meeting. A plurality of the votes of Shareholders cast at the Annual Meeting is required for the election of each director. Abstentions are counted in the number of shares present for purposes of determining whether a quorum is present, and are counted as having voted on each matter presented for vote. As a result, an abstention has the same effect as a vote against a proposal, but will have no effect on the vote to elect directors. Broker non-votes are counted in the number of shares present for purposes of determining whether a quorum is present, but as not being present as to matters for which voting instructions are not given. As a result, broker non-votes will not effect voting on any matter voted on at the meeting. Any proxy given pursuant to this solicitation may be revoked by the person giving it at any time before it is voted. Proxies may be revoked by (i) filing with the Secretary of the Company, at or before the Annual Meeting, a written notice of revocation bearing a date later than the date of the proxy, (ii) duly executing and dating a subsequent proxy relating to the Common Stock and delivering it to the Secretary of the Company at or before the vote is taken at the Annual Meeting, or (iii) attending the Annual Meeting and voting in person (although attendance at the Annual Meeting will not in and of itself constitute a revocation of a proxy). Any written notice revoking a proxy should be sent to Eric H. Brunngraber, Secretary, Cass Information Systems, Inc., 13001 Hollenberg Drive, Bridgeton, Missouri 63044 (telephone number (314) 506-5500). All Common Stock represented at the Annual Meeting by properly executed proxies received prior to or at the Annual Meeting and not properly revoked will be voted at the Annual Meeting in accordance with the instructions indicated in such proxies. If no instructions are indicated, such proxies will be voted FOR the election of the Board's director nominees. The Board of Directors of the Company does not know of any matters, other than the matters described in the Notice of Annual Meeting attached to the Proxy Statement that will come before the Annual Meeting. The proxies are solicited by the Board of Directors of the Company. In addition to the use of the mails, proxies may be solicited personally or by telephone or facsimile transmission, by directors, officers or regular employees of the Company or persons employed by the Company for the purpose of soliciting proxies. It is contemplated that brokerage houses, custodians, nominees and fiduciaries will be requested to forward the soliciting material to the beneficial owners of Common Stock held of record by such persons, and will be reimbursed by the Company for expenses incurred therewith. The cost of solicitation of proxies will be borne by the Company. 1

ELECTION OF DIRECTORS Pursuant to the by-laws of the Company, the Company's Board of Directors is divided into three classes of approximately equal numbers of directors. Each of the twelve directors is elected for a three-year term, and the term of each class of directors expires in a different year. During 2003, directors who were not officers of the Company received a $300 monthly retainer fee, a $600 fee for attendance at each meeting of the Board and a $400 fee for attendance at each meeting of a Committee of the Board. Upon re-election to the Board, each director who was not an officer of the Company received 300 shares of restricted stock, which the director is entitled to vote and upon which they are entitled to receive dividends. Shares are subject to a three-year vesting schedule, with 1/3 of the shares vesting each year on the anniversary date of the awards. The nominees for election to the Board of Directors are Mr. Collett, Mr. Grace, Mr. Shepard, and Mr. Signorelli, each of whom is a current director of the Company. The Board of Directors of the Company recommends a vote FOR the nominees for election to the Board of Directors. The members of the Company's Board of Directors whose terms will continue after the meeting, including the nominees for re-election to the Board, with certain information about each of them, including their principal occupations for the past five years, are listed below: Principal Occupation Director During Past 5 Years -------- ------------------- Robert J. Bodine Chairman Emeritus, Bodine Age: 79 Aluminum, Inc. since 1990. Director since 1966 Current term expires 2006 Eric H. Brunngraber Chief Financial Officer and Age: 47 Vice President-Secretary of the Director since 2003 Company & subsidiaries since 1997. Current term expires 2005 Bryan S. Chapell President, Covenant Age: 49 Theological Seminary since 1994. Director since 1998 Current term expires 2005 Lawrence A. Collett Chairman of the Board of the Company Age: 61 & subsidiaries since 1992; Director since 1983 Chief Executive Officer of the Current term expires 2004 Company & subsidiaries since 1990. Mr. Collett is a nominee for re-election to the Board of Directors. Thomas J. Fucoloro Retired President, CEO Age: 78 Todd Uniform Director since 1986 Current term expires 2006 Wayne J. Grace Managing Director, Age: 63 Grace Advisors, Inc. since 1983. Director since 2003 Mr. Grace is a nominee for Current term expires 2004 re-election to the Board of Directors. 2

Principal Occupation Director During Past 5 Years -------- ------------------- Harry J. Krieg Chairman Emeritus of the Company & Age: 79 subsidiaries since 1992. Director since 1962 Current term expires 2006 Howard A. Kuehner Investor Age: 88 Retired Insurance Agent Director since 1966 Current term expires 2006 Jake Nania Investor Age: 79 Retired President, Bridal Originals Director since 1967 Current term expires 2005 Irving A. Shepard President, Venture Age: 86 Consultants, Inc. since 1985. Director since 1970 Mr. Shepard is a nominee for Current term expires 2004 re-election to the Board of Directors. Andrew J. Signorelli Vice President, Andrews Educational Age: 64 & Research Center since 1983; Director since 1986 Founder, Hope Educational & Research Current term expires 2004 Center. Mr. Signorelli is a nominee for re-election to the Board of Directors. Bruce E. Woodruff Attorney, of counsel to Armstrong Age: 73 TeasdaleLLP since 1996. Prior thereto Director since 1995 Mr. Woodruff served as Associate and Current term expires 2005 Partner with Armstrong Teasdale LLP from 1959 to 1995. Board and Committee Membership The Company's Board of Directors oversees and guides the Company's management and its business. Committees support the role of the Board on issues that benefit from consideration by a smaller, more focused subset of directors. Based on the independence standards defined by the rules of Nasdaq, the Board has determined in its business judgment that each of the 10 non-management directors on the Board of 12 members is independent. Mr. Collett and Mr. Brunngraber are members of management and as a result are not considered independent directors. During 2003, there were 12 meetings of the Board of Directors. Each director attended at least 75% of the aggregate number of meetings of the Board and committees on which he served. The Company's directors are encouraged, but not required, to attend the Company's annual meeting of shareholders. Six directors attended the 2003 Annual Meeting. 3

The following table presents, as of March 5, 2004, the key Committees of the Board, the membership of such Committees and the number of times each such Committee met in 2003. --------------------------------------------- Committee --------------------------------------------- Nominating and Corporate Nominee/Director Audit Compensation Governance** ------------------------------------------------------------------------ Robert J. Bodine X Eric H. Brunngraber Bryan S. Chapell X Lawrence A. Collett Thomas J. Fucoloro Wayne J. Grace X X Harry J. Krieg X X* Howard A. Kuehner Jake Nania Irving A. Shepard X X Andrew J. Signorelli X* Bruce E. Woodruff X* ------------------------------------------------------------------------ Number of Meetings in 2003: 5 6 -- ------------------------------------------------------------------------ * Committee Chairman ** The committee was formed in November 2003 and held its first meeting in January 2004. The Audit Committee is composed entirely of independent directors and operates pursuant to a written charter, included as Exhibit I and available at www.cassinfo.com. The Committee is responsible for appointing the independent auditors for the Company, and meeting with the independent auditors and other corporate officers to review matters relating to corporate financial reporting and accounting procedures and policies. Among other responsibilities, the Audit Committee also reviews financial information provided to shareholders and others, assesses the adequacy of financial, accounting, operating and disclosure controls, evaluates the scope of the audits of the independent auditors and reports on the results of such reviews to the Board of Directors. In addition, the Committee assists the Board in its oversight of the performance of the Company's internal auditors. The Committee meets with the internal auditors on a quarterly basis to review the scope and results of such services. The Board of Directors has determined that Mr. Grace and Mr. Krieg serve as "audit committee financial experts", as defined by the Securities and Exchange Commission (SEC) and Nasdaq listing rules. The Compensation Committee is composed entirely of independent directors and operates pursuant to a written charter, which is available at www.cassinfo.com. The Committee reviews and recommends to the Board the salaries and all other forms of compensation of the officers of the Company and its subsidiaries. The Nominating and Corporate Governance Committee is composed entirely of independent directors and operates pursuant to a written charter, which is available at www.cassinfo.com. The Nominating and Corporate Governance Committee is responsible for identifying individuals qualified to become members of the Board, recommending director nominees, and developing and addressing corporate governance principles and issues applicable to the Company and its subsidiaries. In recommending director nominees to the Board, the Committee solicits candidate recommendations from its own members, other directors and management. Although the Nominating and Corporate Governance Committee does not specifically solicit suggestions for possible candidates from shareholders, the Committee will consider candidates meeting the criteria set by the Committee with the concurrence of the full Board and re-evaluated periodically, including those set out in the Committee's charter. Suggestions, together with a description of the proposed nominee's qualifications, other relevant biographical information and an indication of the willingness of the proposed nominee to serve, should be sent to the Nominating and Corporate Governance Committee, c/o Eric H. Brunngraber, Secretary, Cass Information Systems, Inc., 13001 Hollenberg Drive, Bridgeton, Missouri 63044. 4

Report of the Audit Committee The Audit Committee, composed entirely of independent directors, assists the Board in its oversight of (1) the integrity of the financial statements of the Company, (2) the independent auditor's qualifications and independence (3) the performance of the independent auditors and the Company's internal audit function, and (4) the compliance by the Company with legal and regulatory requirements. The Audit Committee operates pursuant to a written charter that was last revised and adopted January 2004, and is included as Exhibit I. In the performance of its oversight function and in connection with the December 31, 2003 consolidated financial statements, the Audit Committee reviewed and discussed the audited consolidated financial statements with management. The Committee also discussed with the independent auditors the matters required by Statement on Auditing Standards No. 61, Communications with Audit Committees, as currently in effect. The Committee has also received and discussed with the independent auditors the matters required by Independence Standards Board Statement No. 1, Independence Discussions with Audit Committees, as currently in effect. The Committee has considered whether the provision of all non-audit services by the independent auditors to the Company is compatible with maintaining the independent auditors' independence and has discussed with them their independence. Based upon these reviews and discussions, and the roles and responsibilities of the Committee outlined in its charter, the Audit Committee recommended to the Board of Directors that the audited consolidated financial statements be included in the Annual Report on Form 10-K filed with the SEC. Bruce E. Woodruff, Chairman Wayne J. Grace Harry J. Krieg Irving A. Shepard Report of the Compensation Committee The Compensation Committee is appointed by the Board of Directors and is composed of three independent directors, one of whom serves as chairman of the Committee. The Committee operates under a written charter approved by the Board of Directors. The Committee establishes and administers the Company's executive compensation programs and benefits. During the year, the Committee analyzed, reviewed and approved each of these programs. While the Committee may seek input occasionally from the Chief Executive Officer, the Chief Financial Officer or the Director of Human Resources, all matters are independently resolved and decided without the presence or voting of any officer of the Company or its subsidiaries. The Compensation Committee of the Board is also responsible for recommending salary levels for executive officers to the Board of Directors of the Company and recommending the overall levels of salary compensation for the entire corporation. The Committee's goal with regard to executive compensation has been to develop and provide a combination of programs, which enables the Company to attract and retain competent executive officers and other management personnel with the capabilities and experience necessary to continue leading the Company in meeting its objectives and in furthering its growth and profitability. It is further the goal of the Committee to reward executives and managers in accordance with the results that are accomplished. The Committee believes that total compensation should be related to profits and to the performance of the Company. For this reason, overall compensation is tied to incentive bonus plans that are directly related to the Company's earnings. In order to determine the levels of peer compensation within its industry, the Committee utilizes the services of Peter R. Johnson & Company of West Chester, Pennsylvania. Additionally, when evaluating the cash compensation and stock incentives for senior executive management, the Committee utilizes the services of Towers Perrin and other compensation sources for comparison to companies performing in industries similar to those of the Company. The Committee considers stock options and grants to be a significant motivational tool for rewarding its executive officers and senior management. Stock options and grants provided under the Company's stock incentive programs are awarded primarily on the basis of performance of the Company, performance of the individual operating subsidiaries, relationship of the Company's performance to other companies in its peer group, and the recommendation of the CEO regarding the individual's performance. The Committee seeks to maintain salaries at levels competitive with peer groups. Bonuses are available to all personnel in the Company based upon the level of profits before taxes achieved by the Company. These bonuses are distributed on the basis of merit. Performance is measured on the basis of several factors deemed relevant and bonuses are calculated on the basis of these evaluations. The determination of bonuses for the Company's executive officers is a subjective process, which utilizes individual performance, growth in the 5

Company's profits, resources, and the quality of the Company's operations, as well as adherence to regulatory requirements. The amount of bonus available for executive officers is a percentage of the profit sharing allocation for all staff members and is based on the growth in net earnings of the Company. As a result, the amount available for executive officers in 2003 was increased from 2002 levels and most of the executives received bonuses in 2003 comparable or slightly higher than those received in 2002 due to the level of profits achieved in 2003. Salaries of the CEO, CFO and other executive officers are reviewed by the Committee annually in December for the following fiscal year. Bonuses are calculated in July and January, and relate directly to the profit performance for the year. The CEO's bonus is a percentage of total profit sharing allocations and fluctuates with the Company's return on equity. The CEO's salary was increased in 2003 due to improved profitability in 2002. The CEO's bonus for 2003 was directly related to profit performance in 2003 and was slightly higher than that received in 2002. The CEO also received long-term incentive awards for 2003 in the form of Incentive Stock Options and Restricted Stock Grants. Andrew J. Signorelli, Chairman Robert J. Bodine Irving A. Shepard Compensation Committee Interlocks and Insider Participation No member of the Compensation Committee is or was during the year ended December 31, 2003 an officer, former officer or employee of the Company or any of its subsidiaries or a person having a relationship requiring disclosure by the Company pursuant to item 404 of SEC Regulation S-K. No executive officer of the Company served as a member of (i) the compensation committee of another entity in which one of the executive officers of such entity served on the Company's Compensation Committee or (ii) the Board of Directors of another entity in which one of the executive officers of such entity served on the Company's Board of Directors, during the year ended December 31, 2003. Certain Relationships and Related Party Transactions Some of the directors and executive officers of the Company, and members of their immediate families and firms and corporations with which they are associated, have had transactions with the Company's subsidiary bank, including borrowing and investments in depository accounts. All such loans and investments have been made in the ordinary course of business, have been made on substantially the same terms, including interest rates charged or paid and collateral required, as those prevailing at the same time for comparable transactions with unaffiliated persons, and did not involve more than the normal risk of collectibility or present other unfavorable features. As of December 31, 2003, the aggregate amount of all loans and available credit to officers and directors of the Company and to firms and corporations in which they have at least a 10% beneficial interest was approximately $3,285,081, which represented approximately 5% of the Company's consolidated shareholders' equity at that date. Communications with the Board of Directors Shareholders may communicate with any and all members of the Board of Directors by transmitting correspondence to the following address or fax number: Name of Director(s) c/o Eric H. Brunngraber, Secretary Cass Information Systems, Inc. 13001 Hollenberg Drive Bridgeton, Missouri 63044 (314) 506-5560 (fax) The Secretary will forward all correspondence to the Chairman of the Board or the identified director as soon as practicable. Communications that are abusive, in bad taste or that present a safety or security concern may be handled differently. Correspondence addressed to the full Board will be forwarded to the Chairman of the Board. As deemed necessary, the Chairman will present the correspondence to the full Board or a committee thereof. If a response to the communication is warranted, the content and method of the response may be coordinated with the Company's legal counsel. 6

Executive Officers The executive officers of the Company, their ages and their positions with the Company and subsidiaries are set forth below. All officers serve at the pleasure of the Company's Board of Directors. Name Age Positions ---- --- --------- Lawrence A. Collett 61 Chairman and Chief Executive Officer of the Company and subsidiaries; Director of the Company and subsidiaries Eric H. Brunngraber 47 Chief Financial Officer and Vice President-Secretary of the Company and subsidiaries; Director of the Company and subsidiaries Harry M. Murray 50 Executive Vice President John F. Pickering 53 Chief Operating Officer - Transportation Information Services Executive Compensation The following table summarizes compensation to the Company's Chief Executive Officer and all other executive officers of the Company for each of the last three fiscal years. Long Term Compensation ------------------------ Annual Compensation Restricted Securities Name and ------------------- Stock, ($) Underlying All Other Principal Position Year Salary Bonus Awards Options (#)* Compensation (1) - ------------------ ---- ------ ----- ------ ------------ ---------------- Lawrence A. Collett 2003 $365,000 $ 60,900 $ 67,716(2) 9,029 $ 4,980 Chairman and 2002 341,000 58,000 -- -- 4,290 Chief Executive Officer 2001 316,000 56,700 -- -- 3,840 of the Company and subsidiaries Eric H. Brunngraber 2003 $181,600 $ 33,000 $ 22,275(3) 2,970 $ 3,450 Chief Financial Officer and 2002 156,600 29,000 -- -- 3,056 Vice President - Secretary 2001 126,600 25,500 -- -- 2,586 of the Company and subsidiaries Harry M. Murray 2003 $170,000 $ 30,500 $ 15,042(4) 1,818 $ 3,690 Executive Vice President 2002 150,000 21,000 -- -- 2,914 2001 140,000 14,700 -- -- 2,755 John F. Pickering 2003 $150,000 $ 24,000 -- -- $ 3,378 Chief Operating Officer - 2002 150,000 19,080 -- -- 3,168 Transportation Information 2001 166,500 14,500 -- -- 3,240 Services * All share information has been restated to reflect the 10% stock dividend declared by the Company in February 2004. (1) These amounts represent Company matching contributions paid on behalf of the executive under the Company's 401(k) Plan (in 2003 contributions were $3,000 for Mr. Collett, $3,000 for Mr. Brunngraber, $3,000 for Mr. Murray, and $2,688 for Mr. Pickering) and the imputed value of group term life premiums paid on their behalves (in 2003 premiums were $1,980 for Mr. Collett, $450 for Mr. Brunngraber, $690 for Mr. Murray, and $690 for Mr. Pickering). (2) Represents the value of restricted stock awarded to Mr. Collett on January 21, 2003 for performance of the Company in 2002, pursuant to the terms of the Company's 1995 Restricted Stock Bonus Plan. The value of restricted stock was calculated by multiplying the number of shares awarded by the average of the high and low market price of the Company's stock on the day prior to the date of the award. Shares are subject to a three-year vesting schedule, with 1/3 of the shares vesting each year on the anniversary date of the awards, beginning January 21, 2004. Mr. Collett is entitled to vote and entitled to receive dividends on these restricted shares. At December 31, 2003 the unvested restricted stock holding of Mr. Collett consisted of 3,009 shares, with a value of $90,589 based on the market value of the Company's shares at December 31, 2003. 7

(3) Represents the value of restricted stock awarded to Mr. Brunngraber on January 21, 2003 for performance of the Company in 2002, pursuant to the terms of the Company's 1995 Restricted Stock Bonus Plan. The value of restricted stock was calculated by multiplying the number of shares awarded by the average of the high and low market price of the Company's stock on the day prior to the date of the award. Shares are subject to a three-year vesting schedule, with 1/3 of the shares vesting each year on the anniversary date of the awards, beginning January 21, 2004. Mr. Brunngraber is entitled to vote and entitled to receive dividends on these restricted shares. At December 31, 2003 the unvested restricted stock holding of Mr. Brunngraber consisted of 990 shares, with a value of $29,799 based on the market value of the Company's shares at December 31, 2003. (4) Represents the value of restricted stock awarded to Mr. Murray on April 15, 2003, pursuant to the terms of the Company's 1995 Restricted Stock Bonus Plan. The value of restricted stock was calculated by multiplying the number of shares awarded by the average of the high and low market price of the Company's stock on the day prior to the date of the award. Shares are subject to a three-year vesting schedule, with 1/3 of the shares vesting each year on the anniversary date of the awards, beginning April 15, 2004. Mr. Murray is entitled to vote and entitled to receive dividends on these restricted shares. At December 31, 2003 the unvested restricted stock holding of Mr. Murray consisted of 606 shares, with a value of $18,244 based on the market value of the Company's shares at December 31, 2003. Option/SAR Grants in 2003 The following table summarizes options granted during 2003 to the executive officers named above, together with estimates of the value of such options at the end of their seven-year terms assuming the market value of the Common Stock appreciates at an annual rate of 5% or 10%. Percent of Potential Realizable Number of Total Value at Assumed Annual Securities Options Rates of Stock Price Underlying Granted to Appreciation For Options Employees Exercise Options Term Granted in Fiscal Base Price Expiration ---------------------- (#)(*) Year ($/SH)(*) Date 5% ($) 10% ($) ---------- ---------- ---------- ---------- -------- -------- Mr. Collett 9,029 58% $22.500 2010 $179,277 $326,489 Mr. Brunngraber 2,970 19 22.500 2010 58,966 107,384 Mr. Murray 1,818 12 24.745 2010 32,018 61,661 * All share information has been restated to reflect the 10% stock dividend declared by the Company in February 2004. Options Exercised in 2003 and Year-end Option Values The following table summarizes options exercised during 2003 and the values of options outstanding on December 31, 2003, for the executive officers named above. Number of Securities Value of Underlying Unexercised Unexercised In-the-Money Options at Options at Shares Fiscal Year-End Fiscal Year-End Acquired on Value Exercisable/ Exercisable/ Exercise (#)* Realized ($) Unexercisable (#)* Unexercisable ($)(1) ------------- ------------ ------------------ -------------------- Mr. Collett 26,421 $507,923 664 / 37,240 $5,471 / $300,982 Mr. Brunngraber -- -- 1,173 / 11,036 9,441 / 86,639 Mr. Murray -- -- 66 / 7,526 552 / 56,760 Mr. Pickering -- -- 66 / 5,708 552 / 47,024 * All share information has been restated to reflect the 10% stock dividend declared by the Company in February 2004. (1) Based on the market value of the Company's common stock on the Nasdaq Stock Market on December 31, 2003. 8

Defined Contribution Savings Plan All full-time employees of the Company and subsidiaries are eligible to participate in the Cass Information Systems, Inc. 401(k) Plan. Employees may voluntarily defer up to 15% of pre-tax earnings subject to the IRS maximum limitation, which was $12,000 for 2003. Voluntary deferrals contributed to the 401(k) Plan by the Executive officers are included in Annual Salary Compensation in the Summary Compensation Table. The Company matches 50% of the first 3% of employee contributions, subject to IRS limitations. Amounts contributed to the Plan in 2003 for the benefit of the executive officers are included in Other Compensation in the Summary Compensation Table. Each executive officer is fully vested in Company contributions. Defined Benefit Retirement Plans Retirement Plan for Employees of Cass Information Systems, Inc. All executive officers of the Company and subsidiaries are participants in the Retirement Plan for Employees of Cass Information Systems, Inc., which covers all full-time employees. Upon retirement, participants in the plan will begin to receive monthly payments equal to one-twelfth of the sum of: (a) .9% of Final Average Earnings multiplied by the number of years of participation, plus (b) .5% of Final Average Earnings in excess of Covered Compensation multiplied by years of participation. Final Average Earnings is defined as the average annual total compensation for the five consecutive years of highest earnings during the last ten years of employment. Covered Compensation is the average of the maximum social security taxable wage bases in effect for each calendar year during the 35-year period ending with the year in which retirement age is attained under the Social Security Act. Earnings covered by the Plan equal total compensation as reported in the Summary Compensation Table including any amounts deferred under the Cass Information Systems, Inc. 401(k) Plan. Normal retirement under the Plan commences at age 65. At normal retirement the years of participation under the Plan for the executive officers listed in the Compensation Table would be as follows: Mr. Collett-41; Mr. Brunngraber-41; Mr. Murray-34; and Mr. Pickering-37. The following table shows the estimated annual benefits payable at retirement, assuming a straight-life annuity with 120 months guaranteed. Estimated Annual Retirement Benefit (1)(2) Final Years of Service Credited at Retirement Average --------------------------------------- Earnings 10 15 20 25 30 35 40 - -------------------------------------------------------------------------------------------------------- $ 125,000 $ 15,100 $ 22,600 $ 30,100 $ 37,700 $ 45,200 $ 52,800 $ 60,300 150,000 18,600 27,900 37,100 46,400 55,700 65,000 74,500 175,000 22,100 33,100 44,100 55,200 66,200 77,300 88,300 200,000 25,600 38,400 51,100 63,900 76,700 89,500 102,300 (1) Estimated benefit calculation assumes retirement at age 65 in the year 2005 with no increase in the maximum social security taxable wage base after 2003. (2) Estimated benefits would be subject to Internal Revenue Service maximum retirement limitations in effect at the retirement date. The maximum annual compensation that may be recognized for determining benefits in 2003 was $200,000. 9

Supplemental Executive Retirement Plan In addition to the above defined benefit plan, in 1998 the Company established the Cass Information Systems, Inc. Supplemental Retirement Plan, which covers key executive officers of the Company. This supplemental plan was designed to provide additional retirement benefits to key executives whose benefits are limited by the Internal Revenue Service under the Company's qualified plan. Upon retirement, participants in the plan will receive monthly payments equal to one twelfth of 70% of Final Average Earnings and reduced proportionately for length of service less than 25 years and reduced by the participant's: (a) Qualified retirement plan benefit, (b) Primary social security benefit, and (c) 401(k) hypothetical annuity. Final Average Earnings, normal retirement age and years of participation at normal retirement are the same as under the Retirement Plan for Employees of Cass Information Systems, Inc. The following table shows the estimated annual benefits payable at retirement, assuming a straight-life annuity with 120 months guaranteed. Estimated Annual Retirement Benefit (1) Final Years of Service Credited at Retirement Average --------------------------------------- Earnings 10 15 20 25 30 35 40 - -------------------------------------------------------------------------------------------------------- $ 125,000 $ -- $ -- $ 4,100 $ 14,000 $ 6,500 $ -- $ -- 150,000 -- -- 8,200 19,900 10,600 1,300 -- 175,000 -- -- 12,300 25,700 14,700 3,600 -- 200,000 -- 3,400 18,700 33,900 21,100 8,300 -- 300,000 26,500 45,400 74,700 103,900 91,100 78,300 65,500 400,000 54,500 87,400 130,700 173,900 161,100 148,300 135,500 (1) Estimated benefit calculation assumes retirement at age 65 in the year 2004. 10

Performance Quoted on The Nasdaq Stock Market for the last Five Fiscal Years The following graph compares the cumulative total returns of the Company, the Nasdaq Stock Market, and the Nasdaq Computer and Data Processing Stocks over the last five fiscal years. The graph assumes that $100 was invested on December 31, 1998, with dividends reinvested. Returns are based on end of period prices. Comparison of Cumulative Total Returns Performance Quoted on The Nasdaq Stock Market for the last Five Fiscal Years Cass Information Systems, Inc. [PERFORMANCE CHART] Nasdaq Cass Nasdaq Computer and Information Stock Data Processing Systems, Inc. Market (US) Stocks - ------------------------------------------------------------------------------------------ 12/31/1998 12/31/1998 100.000 100.000 100.000 1/29/1999 100.000 114.503 120.902 2/26/1999 100.503 104.250 107.240 3/31/1999 100.772 112.122 120.611 4/30/1999 100.265 115.683 114.460 5/28/1999 99.759 112.432 111.699 6/30/1999 100.020 122.529 125.444 7/30/1999 100.020 120.317 117.975 8/31/1999 99.255 125.386 124.253 9/30/1999 104.927 125.529 130.631 10/29/1999 96.697 135.582 140.423 11/30/1999 89.496 152.015 163.310 12/31/1999 12/31/1999 84.040 185.428 219.990 1/31/2000 83.521 178.613 194.264 2/29/2000 85.077 212.670 230.223 3/31/2000 82.774 208.330 217.293 4/28/2000 88.013 175.216 166.506 5/31/2000 88.537 154.081 146.191 6/30/2000 87.799 181.135 177.313 7/31/2000 86.212 171.671 159.226 8/31/2000 82.298 191.960 179.439 9/29/2000 74.816 167.017 164.011 10/31/2000 73.747 153.291 150.101 11/30/2000 78.691 118.103 108.876 12/29/2000 12/29/2000 75.642 111.832 101.251 1/31/2001 96.714 125.375 117.071 2/28/2001 88.609 97.055 89.540 3/30/2001 80.192 83.408 73.862 4/30/2001 85.342 95.847 90.749 5/31/2001 86.847 95.742 90.899 6/29/2001 87.252 98.357 96.178 7/31/2001 88.177 92.108 84.396 8/31/2001 87.913 82.080 69.644 9/28/2001 93.566 68.247 58.826 10/31/2001 93.477 77.007 68.386 11/30/2001 105.050 87.970 77.581 12/31/2001 12/31/2001 109.980 88.710 81.535 1/31/2002 109.980 88.037 81.107 2/28/2002 112.562 78.882 73.087 3/30/2002 113.558 84.055 75.234 4/30/2002 112.224 77.073 63.694 5/31/2002 113.445 73.673 59.624 6/29/2002 113.577 67.001 59.794 7/31/2002 111.279 60.883 52.514 8/31/2002 104.911 60.238 52.777 9/28/2002 106.514 53.760 46.254 10/31/2002 107.342 61.104 55.913 11/30/2002 112.173 67.916 63.272 12/31/2002 12/31/2002 119.815 61.331 56.226 1/31/2003 123.712 60.668 54.972 2/28/2003 129.167 61.521 54.648 3/30/2003 128.846 61.698 54.780 4/30/2003 158.886 67.306 59.030 5/31/2003 129.582 73.216 62.138 6/29/2003 147.762 74.391 63.554 7/31/2003 144.275 79.518 65.766 8/31/2003 154.563 82.983 68.764 9/28/2003 164.108 81.904 69.375 10/31/2003 154.100 88.496 71.602 11/30/2003 149.196 89.809 71.162 12/31/2003 12/31/2003 165.982 91.702 74.078 11

Principal Shareholders The following table contains information with respect to beneficial ownership of the Company's outstanding common stock, as of March 5, 2004, by: (1) each person known to the Company to be the beneficial owner of more than 5% of common stock, (2) each director of the Company and (3) each executive officer of the Company. All share information has been restated to reflect the 10% stock dividend declared by the Company in February 2004. The address of each director and executive officer is c/o Cass Information Systems, Inc., 13001 Hollenberg Drive, Bridgeton, Missouri 63044. Unless otherwise indicated, the named person has sole voting and investment rights with respect to such shares. Name of Number of Shares Percent Beneficial Owner Beneficially Owned of Class - ---------------- ------------------ -------- Rutabaga Capital Management 228,953 (1) 6.22% 64 Broad Street, 3rd Floor Boston, MA 02109 Directors and Executive Officers: Robert J. Bodine 98,741 (2) 2.68% Eric H. Brunngraber 7,417 (3) * Bryan S. Chapell 1,042 (4) * Lawrence A. Collett 70,369 (5) 1.91 Thomas J. Fucoloro 676 (6) * Wayne J. Grace 110 (7) * Harry J. Krieg 59,105 (8) 1.61 Howard A. Kuehner 137,289 (9) 3.73 Harry M. Murray 11,339 (10) * Jake Nania 397,742 (11) 10.81 John F. Pickering 10,851 (12) * Irving A. Shepard 20,450 (13) * Andrew J. Signorelli 129,663 (14) 3.52 Bruce E. Woodruff 8,200 (15) * All directors and executive officers -------- as a group 952,994 25.90% - ---------- * Less than 1% of class. (1) Information with respect to the outstanding shares beneficially held by Rutabaga Capital Management is based on Schedule 13G/A filed with the SEC on February 4, 2004 by such firm. (2) Includes 330 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Bodine has voting but no investment rights. Excludes 11,245 shares held in a trust as to which Mr. Bodine's wife has sole voting and investment rights. (3) Includes 3,192 shares owned jointly with his wife. Includes 1,526 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Brunngraber has voting but no investment rights. Includes 2,698 shares Mr. Brunngraber has the right to acquire under the 1995 Performance-Based Stock Option Plan. (4) These shares are owned jointly with his wife. Includes 231 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Chapell has voting but no investment rights. (5) Includes 33,721 shares owned jointly with his wife. Includes 4,429 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Collett has voting but no investment rights. Includes 5,428 shares Mr. Collett has the right to acquire under the 1995 Performance-Based Stock Option Plan. 12

(6) Includes 330 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Fucoloro has voting but no investment rights. Excludes 231 shares held in a trust as to which Mr. Fucoloro's wife has sole voting and investment rights. (7) Represents shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Grace has voting but no investment rights. Excludes 550 shares owned by his wife. (8) Includes 58,775 shares held in a trust with Mr. Krieg having shared voting and investment rights. Includes 330 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Krieg has voting but no investment rights. Excludes 59,148 shares owned by his wife. (9) Includes 65,437 shares held in a trust with Mr. Kuehner having shared voting and investment rights. Includes 330 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Kuehner has voting but no investment rights. Excludes 123,569 shares owned by his wife. (10) Includes 9,858 shares owned jointly with his wife. Includes 606 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Murray has voting but no investment rights. Includes 875 shares Mr. Murray has the right to acquire under the 1995 Performance-Based Stock Option Plan. (11) Includes 397,511 shares held in a trust with Mr. Nania having sole voting and investment rights. Includes 231 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Nania has voting but no investment rights. (12) Includes 9,975 shares owned jointly with his wife. Includes 875 shares Mr. Pickering has the right to acquire under the 1995 Performance-Based Stock Option Plan. (13) Includes 20,334 shares held in a family partnership in which Mr. Shepard has shared voting and investment rights. Includes 115 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Shepard has voting but no investment rights. (14) Includes 129,548 shares held in various trusts with Mr. Signorelli having shared voting and investment rights. Includes 115 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Signorelli has voting but no investment rights. (15) Includes 7,969 shares held in a trust with Mr. Woodruff having sole voting and investment rights. Includes 231 shares granted under the Company's 1995 Restricted Stock Bonus Plan, which are subject to forfeiture; however, Mr. Woodruff has voting but no investment rights. Section 16(a) Beneficial Ownership Compliance Section 16(a) of the Securities Exchange Act of 1934 requires the Company's directors and executive officers, and persons who own more than ten percent of the registered class of the Company's equity securities, to file reports of ownership and changes in ownership with the Securities and Exchange Commission (SEC) and The Nasdaq Stock Market. Directors and executive officers and greater than ten-percent shareholders are required by SEC regulations to furnish the Company with copies of all Section 16(a) forms they file. Based on its review of the copies of such forms received by it and written representation from certain reporting persons that no Forms 5 were required for those persons, the Company believes that during 2003 all filing requirements applicable to its directors, executive officers, and greater than ten-percent beneficial owners were complied with in a timely manner. 13

INDEPENDENT AUDITORS KPMG LLP were the auditors of the Company during the year ended December 31, 2003 and also have been selected by the Audit Committee of the Board of Directors to serve as auditors for the present year. KPMG LLP has served as the Company's independent auditors since 1983. A representative of KPMG LLP is expected to be present at the Meeting, will have an opportunity to make a statement if he or she desires to do so, and is expected to be available to respond to appropriate questions of Shareholders. Fees Incurred For 2003 Services Performed by the Independent Auditors For the years ended December 31, 2003 and 2002, the Company incurred the following fees for services performed by KPMG LLP: 2003 2002 ---- ---- Audit Fees (1)(3) $101,300 $101,850 Audit-related Fees - - Taxes (2)(3) 69,745 74,200 All Other Fees (3) - 28,489 (4) (1) The Audit Committee has considered whether the provision of these services is compatible with maintaining the principal auditor's independence. (2) Represents tax compliance and preparation services. (3) 100% of these services were pre-approved by the Audit Committee. (4) Represents services performed during an Information Technology Security review. It is the policy of the Audit Committee to pre-approve all non-audit services provided by our independent auditors. OTHER MATTERS Management does not intend to present to the Annual Meeting any business other than the items stated in the "Notice of Meeting of Shareholders" and does not know of any matters to be brought before the Meeting other than those referred to above. If, however, any other matters properly come before the Meeting, the persons designated as proxies will vote on each such matter in accordance with their best judgment. SHAREHOLDER PROPOSALS Any proposal to be presented at next year's Annual Meeting must be received at the principal executive offices of the Company not later than November 17, 2004. Any such proposals should be directed to the attention of the Secretary for consideration for inclusion in the Company's Proxy Statement and Form of Proxy relating to the next Annual Meeting. Any such proposals must comply in all respects with the rules and regulations of the Securities and Exchange Commission. The Company's Form of Proxy for next year's Annual Meeting may permit the representatives named in the proxy to vote in their discretion on any other shareholder proposal of which notice has not been given to the Company by January 31, 2005. It is suggested that proponents of any proposals submit such proposals to the Company sufficiently in advance of the deadline by Certified Mail-Return Receipt Requested. By Order of the Board of Directors Eric H. Brunngraber Secretary 14

Cass Information Systems, Inc. Exhibit I Audit Committee Charter The purpose of this charter is to set forth the objectives, composition, and responsibilities of the Audit Committee of the Board of Directors (the Committee) of Cass Information Systems, Inc. (the Company). I. PURPOSE The Audit Committee is appointed by the Board of Directors to assist in fulfilling its oversight responsibilities of regulatory compliance, corporate accounting and financial reporting practices of the Company and each of its subsidiaries. In addition, the Committee will: o Oversee and appraise the quality of the internal and external audit processes; o Maintain free and open means of communication between the Board of Directors, the independent auditors, the internal auditors, and management of the Company; o Serve as an independent and objective party to monitor the integrity of the financial information presented by management to shareholders, regulators, and the general public; o Review the adequacy of the Company's administrative, operating and internal accounting controls, and the Company's compliance with the letter and spirit of applicable Federal and state laws and regulations. II. COMPOSITION AND MEETINGS The Committee will be comprised of at least three directors who are (1) independent of the management of the Company, (2) receive no consulting, advisory or other compensatory fees from the Company, other than directors' fees, and (3) are free from any relationship that, in the opinion of the Board of Directors, would interfere with their exercise of independent judgement as a committee member. All members of the Committee shall have a basic understanding of finance and accounting and be able to read and understand fundamental financial statements, and at least one member of the Committee shall have accounting or related financial management expertise. The Committee will hold at least four meetings per year and such additional meetings as the Committee shall require in order to perform its designated duties. III. RESPONSIBILITIES AND DUTIES Financial Reporting and Review 1. Review and assess the adequacy of this charter at least annually. Submit the charter to the Board of Directors for approval and have the document published at least every three years in accordance with Securities and Exchange Commission regulations. 2. Review the annual audited financial statements with management and the independent auditors prior to the Company filing its annual report on Form 10-K, including any significant issues regarding accounting principles, practices and judgements. 3. Review with management and the independent auditors the Company's quarterly financial results prior to the Company filing its report on Form 10-Q, or where practicable, prior to the first public release of quarterly earnings. 1 of 3

Cass Information Systems, Inc. Exhibit I Audit Committee Charter 4. Discuss any significant changes to the Company's accounting principles and any items required to be communicated by the independent auditors in accordance with Statement on Auditing Standards No. 61 (SAS 61), Communication With Audit Committees. 5. Review with the independent auditors and management the Company's "critical accounting policies," as defined by the SEC, including an assessment regarding the adequacy of the Company's disclosures. 6. Discuss earnings releases, as well as financial information and earnings guidance provided by the Company to analysts and ratings agencies. 7. Receive and review reports from the internal auditors and the independent auditors that assess the adequacy and effectiveness of the Company's internal accounting control system; accounting policies and procedures; and, financial and accounting management. 8. Review any disclosures provided by the CEO and the CFO to the Committee regarding significant deficiencies in the design or operation of internal controls which could adversely affect the Company's ability to record, process, summarize, and report financial data. 9. Review legal and regulatory matters that may have a material impact on the financial statements, related Company compliance policies, and programs and reports received from regulators. 10. Monitor management's response and actions taken to correct any deficiencies noted by internal auditors, independent auditors or regulatory agencies. Independent and Internal Audit Oversight 11. Exercise sole authority in the selection and appointment of the independent auditors that is ultimately accountable to the Committee and the Board of Directors. 12. Exercise sole authority to approve the compensation of the independent auditors. 13. Evaluate with the Board the performance and independence of the independent auditors and, if so determined in the Committee's sole authority, replace the independent auditors. 14. Ensure the rotation of the lead audit partner having responsibility for the audit and the concurring review partner responsible for reviewing the audit in accordance with applicable Nasdaq rules and regulations and applicable laws, rules and regulations. 15. Review and concur in the appointment, replacement, or dismissal of the internal auditors. 16. Assist in oversight of the internal auditors' responsibilities, performance, and the adequacy of its resources to carry out its responsibilities. 17. Consider the audit scopes and plans of the internal auditors and independent auditors. Exercise sole authority to approve the terms of all audit engagements of the independent auditors. 18. Review with the internal auditors and the independent auditors the coordination of audit effort to assure completeness of coverage, reduction of redundant efforts, and the effective use of audit resources. 2 of 3

Cass Information Systems, Inc. Exhibit I Audit Committee Charter 19. Annually, receive a formal, written statement from the independent auditors consistent with standards set by Independence Standards Board Standard No. 1, Independence Discussions with Audit Committees. The Committee shall discuss with the independent auditors and approve in advance any relationships or services that may affect their objectivity or independence. 20. Annually prepare a report to shareholders as required by the Securities and Exchange Commission. The report will be included in the Company's annual proxy statement. 21. Maintain minutes of meetings and periodically report to the Board of Directors on significant results of the foregoing activities. 22. Meet with the internal auditors, independent auditors and management in private sessions to discuss any matters that the Committee or these groups believe should be discussed privately with the Committee. 23. Determine that there are no management restrictions placed on the internal auditors or the independent auditors. 24. Conduct or authorize investigations into any matters within the committee's scope of responsibilities, and perform such other functions as assigned by law, the Company's by-laws, or the Board of Directors. 25. Obtain advice, as deemed by the Committee to be necessary and appropriate, from outside legal, accounting and other advisors. 26. Review the results of monitoring compliance with the Company's code of business ethics and conduct. 27. Establish procedures for: (a) the receipt, retention and treatment of complaints received by the Company regarding accounting, internal accounting controls and auditing matters; and (b) the confidential, anonymous submission by employees of the Company of concerns regarding questionable accounting or auditing matters. 28. Review and approve all related-party transactions, as defined by the SEC, with the exclusion of any and all transactions subject to Regulation O issued by the Federal Reserve System. The foregoing shall be the common activities of the Committee. These functions are set forth as a guide with the understanding that the Committee may diverge from this guide as deemed appropriate. While the Committee has the responsibility and powers set forth in this Charter, it is not the duty of the Committee to plan or conduct audits or to determine that the Company's financial statements are complete and accurate and in accordance with generally accepted accounting principles. This is the responsibility of management and the independent auditors. 3 of 3

THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR THE Mark Here FOLLOWING PROPOSAL: for Address |_| Change or Comments 1. Election of four directors to serve until the annual meeting in 2007, or until their successors are elected and qualified. FOR all nominees WITHHOLD listed at right AUTHORITY (except as marked to vote for all nominees to the contrary) listed at right |_| |_| Nominees: 01 Lawrence A. Collett, 02 Wayne J. Grace, 03 Irving A. Shepard and 04 Andrew J. Signorelli (INSTRUCTIONS: To withhold authority to vote for an individual nominee write that nominee's name on the line below.) ________________________________________________________________________________ When properly executed and returned, this proxy will be voted in the manner specified thereon, and in the best judgement of the Proxies on any other business which properly comes before the meeting. If no manner is specified, this proxy will be voted FOR the proposal. Signature __________________ Date ______ Signature _________________ Date ______ Note: Please sign as your name appears hereon. If shares are held by joint tenants, both should sign. When signing as attorney, executor, administrator, trustee or guardian, please give your full name as such. If a corporation, please sign in full corporate name by an authorized officer. If a partnership, please sign in full partnership name by authorized person. - -------------------------------------------------------------------------------- ^ FOLD AND DETACH HERE ^ Vote by Internet or Telephone or Mail 24 Hours a Day, 7 Days a Week Internet and telephone voting is available through 11:59 PM Eastern Time the day prior to annual meeting day. Your Internet or telephone vote authorizes the named proxies to vote your shares in the same manner as if you marked, signed and returned your proxy card. - ------------------------------------ -------------------------------- ---------------------- Internet Telephone Mail http://www.eproxy.com/cass 1-800-435-6710 Mark, sign and date Use the Internet to vote your proxy. Use any touch-tone telephone to your proxy card Have your proxy card in hand when OR vote your proxy. Have your proxy OR and you access the web site. card in hand when you call. return it in the enclosed postage-paid envelope. - ------------------------------------ -------------------------------- ---------------------- If you vote your proxy by Internet or by telephone, you do NOT need to mail back your proxy card.

CASS INFORMATION SYSTEMS, INC. Solicited by the Board of Directors The undersigned hereby constitutes and appoints Lawrence A. Collett and Eric H. Brunngraber, and either of them, attorneys with full power of substitution, with the powers the undersigned would possess if personally present, to vote all shares of Common Stock of the undersigned in CASS INFORMATION SYSTEMS, INC. at the Annual Meeting of Shareholders to be held at 11:00 a.m., April 19, 2004 and at any adjournments thereof on all matters properly before the meeting. (Continued and To Be Signed On Other Side.) ________________________________________________________________________________ Address Change/Comments (Mark the corresponding box on the reverse side) ________________________________________________________________________________ ________________________________________________________________________________ - -------------------------------------------------------------------------------- ^ FOLD AND DETACH HERE ^