Exhibit 99.2 Written Statement of the Chief Financial Officer Pursuant to Section 906 of the ---------- Sarbanes-Oxley Act of 2002 - ----------------------------- The undersigned, the Chief Financial Officer of NBT Bancorp Inc. (the "Company"), hereby certifies that to his knowledge on the date hereof: (a) the Form 10-Q of the Company for the Quarterly Period Ended September 30, 2002, filed on the date hereof with the Securities and Exchange Commission (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and (b) information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. /s/ Michael J. Chewens ------------------------- Michael J. Chewens Senior Executive Vice President Chief Financial Officer and Corporate Secretary November 13, 2002 46