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: March 31, 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
Lake Ariel  Bancorp,  Inc. 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.  restated,  Management's  Discussion  and Analysis of
          Financial  Condition  and  Results  of  Operations,  and  Supplemental
          Consolidated Financial Statements.

<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: March 31, 2000
                                          /s/ Michael J. Chewens
                                          --------------------------------------
                                          Michael J. Chewens
                                          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.  restated  Selected  Financial  Data,  Management's
          Discussion  and  Analysis  of  Financial   Condition  and  Results  of
          Operations,  Consolidated Financial Statements and other Annual Report
          data.

<PAGE>

                                  EXHIBIT 23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


The Board of Directors
NBT Bancorp Inc.:


We consent to incorporation by reference in the registration  statements on Form
S-3 (File No. 33-12247), Form S-8 (File Nos. 33-77410, 333-67615, and 333-32842)
and Form S-4 related to the  registration  of shares for the merger  between NBT
Bancorp Inc. and Pioneer  American  Holding Company Corp.,  filed by NBT Bancorp
under the  Securities  Act of 1933 of our audit  report  dated  March 10,  2000,
relating to the supplemental consolidated balance sheets of NBT Bancorp Inc. and
subsidiaries  as of  December  31, 1999 and 1998,  and the related  supplemental
consolidated  statements  of  income,   stockholders'  equity,  cash  flows  and
comprehensive  income  for each of the  years  in the  three-year  period  ended
December 31, 1999, which report appears in the Current Report on Form 8-K of NBT
Bancorp Inc. dated March 31,, 2000.


/s/ KPMG LLP


Syracuse, New York
March 31, 2000
[{"type": "8-K", "sequence": "1", "description": "FORM 8-K", "secsgml_size_bytes": 4389}]
{"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": "591014"}, "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: March 31, 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
Lake Ariel  Bancorp,  Inc. 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.  restated,  Management's  Discussion  and Analysis of
          Financial  Condition  and  Results  of  Operations,  and  Supplemental
          Consolidated Financial Statements.
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: March 31, 2000
                                          /s/ Michael J. Chewens
                                          --------------------------------------
                                          Michael J. Chewens
                                          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.  restated  Selected  Financial  Data,  Management's
          Discussion  and  Analysis  of  Financial   Condition  and  Results  of
          Operations,  Consolidated Financial Statements and other Annual Report
          data.
EXHIBIT 23.1

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

The Board of Directors
NBT Bancorp Inc.:

We consent to incorporation by reference in the registration  statements on Form
S-3 (File No. 33-12247), Form S-8 (File Nos. 33-77410, 333-67615, and 333-32842)
and Form S-4 related to the  registration  of shares for the merger  between NBT
Bancorp Inc. and Pioneer  American  Holding Company Corp.,  filed by NBT Bancorp
under the  Securities  Act of 1933 of our audit  report  dated  March 10,  2000,
relating to the supplemental consolidated balance sheets of NBT Bancorp Inc. and
subsidiaries  as of  December  31, 1999 and 1998,  and the related  supplemental
consolidated  statements  of  income,   stockholders'  equity,  cash  flows  and
comprehensive  income  for each of the  years  in the  three-year  period  ended
December 31, 1999, which report appears in the Current Report on Form 8-K of NBT
Bancorp Inc. dated March 31,, 2000.

/s/ KPMG LLP

Syracuse, New York
March 31, 2000