Exhibit 23.1 Consent of Deloitte & Touche LLP INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Jack Henry & Associates, Inc. on Form S-8 of our report dated August 16, 2002, appearing in the Annual Report on Form 10-K of Jack Henry & Associates, Inc. for the year ended June 30, 2002. /s/ Deloitte & Touche LLP St. Louis, MO December 5, 2002