SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                    FILED PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                         DATE OF REPORT: August 1, 2000



                         COMMISSION FILE NUMBER 0-14703


                                NBT BANCORP INC.
             (Exact Name of Registrant as Specified in its Charter)

             DELAWARE                                16-1268674
     (State of Incorporation)           (I.R.S. Employer Identification No.)

                  52 SOUTH BROAD STREET NORWICH, NEW YORK 13815
               (Address of Principal Executive Offices)(Zip Code)

       Registrant's Telephone Number, Including Area Code: (607)-337-2265

                                       N/A
          (Former Name or Former Address, If changed since last Report)


<PAGE>



Item 5.  Other Events

Filed as Exhibit  99.1 are  Management's  Discussion  and  Analysis of Financial
Condition and Results of Operations,  and  Supplemental  Consolidated  Financial
Statements of NBT Bancorp Inc.  restated to reflect the acquisition by merger of
Pioneer American Holding Company Corp. The merger was a pooling of interests for
accounting  and  financial  reporting  purposes.   The  consolidated   financial
statements of NBT Bancorp Inc. are restated for periods prior to the date of the
acquisition.

Item 7.  Financial Statements and Exhibits

(a)      Not applicable.

(b)      Not applicable

(c)      The following exhibits are included in this report:

         23.1    Consent of KPMG LLP

         27.1    Restated Financial Data Schedule at December 31, 1999

         27.2    Restated Financial Data Schedule at December 31, 1998

         27.3    Restated Financial Data Schedule at December 31, 1997

         99.1    NBT  Bancorp  Inc.  Management's  Discussion  and  Analysis  of
                 Financial Condition and Results of Operations, and Supplemental
                 Consolidated  Financial  Statements  and  other  Annual  Report
                 data.



<PAGE>



                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                           NBT BANCORP, INC.

Date: July 31, 2000
                                           /s/ Michael J. Chewens
                                           ----------------------
                                           Michael J. Chewens, CPA
                                           Executive Vice President
                                           Chief Financial Officer and Treasurer



                                  EXHIBIT INDEX

   23.1      Consent of KPMG LLP

   27.1      Restated Financial Data Schedule at December 31, 1999

   27.2      Restated Financial Data Schedule at December 31, 1998

   27.3      Restated Financial Data Schedule at December 31, 1997

   99.1      NBT Bancorp Inc. Management's  Discussion and Analysis of Financial
             Condition  and  Results  of  Operations,   Consolidated   Financial
             Statements and other Annual Report data.
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{"company-data": {"conformed-name": "NBT BANCORP INC", "cik": "0000790359", "assigned-sic": "6021", "irs-number": "161268674", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-14703", "film-number": "683046"}, "business-address": {"street1": "52 S BROAD ST", "city": "NORWICH", "state": "NY", "zip": "13815", "phone": "6073372265"}, "mail-address": {"street1": "52 S. BROAD STREET", "city": "NORWICH", "state": "NY", "zip": "13815"}}
SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                    FILED PURSUANT TO SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                         DATE OF REPORT: August 1, 2000

                         COMMISSION FILE NUMBER 0-14703

                                NBT BANCORP INC.
             (Exact Name of Registrant as Specified in its Charter)

             DELAWARE                                16-1268674
     (State of Incorporation)           (I.R.S. Employer Identification No.)

                  52 SOUTH BROAD STREET NORWICH, NEW YORK 13815
               (Address of Principal Executive Offices)(Zip Code)

       Registrant's Telephone Number, Including Area Code: (607)-337-2265

                                       N/A
          (Former Name or Former Address, If changed since last Report)
Item 5.  Other Events

Filed as Exhibit  99.1 are  Management's  Discussion  and  Analysis of Financial
Condition and Results of Operations,  and  Supplemental  Consolidated  Financial
Statements of NBT Bancorp Inc.  restated to reflect the acquisition by merger of
Pioneer American Holding Company Corp. The merger was a pooling of interests for
accounting  and  financial  reporting  purposes.   The  consolidated   financial
statements of NBT Bancorp Inc. are restated for periods prior to the date of the
acquisition.

Item 7.  Financial Statements and Exhibits

(a)      Not applicable.

(b)      Not applicable

(c)      The following exhibits are included in this report:

         23.1    Consent of KPMG LLP

         27.1    Restated Financial Data Schedule at December 31, 1999

         27.2    Restated Financial Data Schedule at December 31, 1998

         27.3    Restated Financial Data Schedule at December 31, 1997

         99.1    NBT  Bancorp  Inc.  Management's  Discussion  and  Analysis  of
                 Financial Condition and Results of Operations, and Supplemental
                 Consolidated  Financial  Statements  and  other  Annual  Report
                 data.
SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.

                                           NBT BANCORP, INC.

Date: July 31, 2000
                                           /s/ Michael J. Chewens
                                           ----------------------
                                           Michael J. Chewens, CPA
                                           Executive Vice President
                                           Chief Financial Officer and Treasurer

                                  EXHIBIT INDEX

   23.1      Consent of KPMG LLP

   27.1      Restated Financial Data Schedule at December 31, 1999

   27.2      Restated Financial Data Schedule at December 31, 1998

   27.3      Restated Financial Data Schedule at December 31, 1997

   99.1      NBT Bancorp Inc. Management's  Discussion and Analysis of Financial
             Condition  and  Results  of  Operations,   Consolidated   Financial
             Statements and other Annual Report data.