EXHIBIT 99.1

                            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 IBT Bancorp, Inc. (the
"Corporation") on Form 10-Q for the period ending March 31, 2003 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I
Dennis P. Angner, Chief Executive Officer and Principal Financial Officer of the
Corporation, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 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 Corporation.


/s/ Dennis P. Angner
- --------------------
Chief Executive Officer and Principal Financial Officer
April 30, 2003

This certification accompanies each Report pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the
Sarbanes-Oxley Act of 2002, be deemed filed by the Corporation for purposes of
Section 18 of the Securities Exchange Act of 1934, as amended.

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




















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