NBT Bancorp Inc. & BSB Bancorp, Inc. Merger of Equals April 20, 2000[BSB LOGO OMMITTED] [NBT LOGO OMITTED] Forward Looking Statement - ------------------------- This presentation contains statements regarding NBT Bancorp Inc. and BSB Bancorp, Inc. following the completion of the merger of equals discussed herein, including strategies, plans and objectives, as well as estimates and statements based on underlying estimates of future financial condition, performance and operating efficiencies on a pro forma basis and cost savings and revenue enhancements and accretion to reported earnings that will be realized from the merger. These statements and estimates constitute forward-looking statements (within the meaning of the Private Securities Litigation Reform Act of 1995), which involve significant risks and uncertainties. A variety of factors could cause actual results and experience to differ materially from forward-looking statements. Factors that might cause such a difference include, but are not limited to, risks and uncertainties related to the consummation of the merger, including the realization of the level of revenues following the merger; integration costs or difficulties; competition from both financial and non-financial institutions; changes in interest rates, deposit flows, loan demand and accounting principles, policies or guidelines; the timing and occurrence (or non-occurrence) of transactions and events that may be subject to circumstances beyond the control of NBT or BSB; and other economic, competitive, governmental, regulatory and technological factors affecting NBT or BSB or the combined institution specifically or the banking industry or economy generally. Neither NBT or BSB assumes any obligation to update these forward-looking statements or to update the reasons why actual results could differ from those projected in the forward-looking statement. This document does not constitute an offer of any securities for sale. Before making any decision with respect to the proposed merger, NBT and BSB stockholders will be provided with a joint proxy statement/prospectus which will be included in the registration statement to be filed with the Securities and Exchange Commission by NBT. All such stockholders should read that registration statement, including the proxy statement, before making any investment decision. 2 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] PRESENTERS - ---------- Daryl R. Forsythe - Chairman President and CEO of NBT Bancorp Inc. Thomas L. Thorn - Acting President and CEO of BSB Bancorp, Inc. Michael J. Chewens - CFO of NBT Bancorp Inc. Rexford C. Decker - CFO of BSB Bancorp, Inc. 3 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Transaction Summary Fixed Exchange Ratio: 2.00 NBTB shares for each share of BSBN Exchange Rationale: Ownership for Earnings Basis Transaction Value at Announcement: (1) $251 million Accounting: Pooling / Tax Free Exchange Due Diligence: Completed Anticipated Expense Reduction: $7.4 million annually Expected Closing: Fourth Quarter of 2000 (1) Based on NBT's April 19, 2000 closing price of $12.00 4 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Transaction Summary (continued) Holding Company Name: To Be Determined Bank Name: To Be Determined Principal Office: Binghamton, NY Board of Directors: (1) 7 from BSB and 8 from NBT including 2 from the company's Pennsylvania subsidiary Chairman & CEO: Daryl R. Forsythe Estimated Merger Charge: $15 to 18 million pre-tax Cross-Options: 19.9% priced at market Price Protection: None (1) Provided NBT's pending transaction with Pioneer American closes. 5 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Transaction Rationale o Exchange ratio was based upon estimated contributions to earnings in future periods by the two participants. (excluding non-recurring charges) o Expected to be accretive to earnings per share for all participants during 2001 0 Improves shareholder liquidity with projected total shares outstanding of 44.9 million o Creates a more visible entity with proforma assets of $4.6 billion which should attract increased analyst coverage and increased interest of institutional investors o Leverages strong competitive positions in adjacent markets 6 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Cost Saving Analysis Non Interest Expense (In Millions) - -------------------- ------------- Salary & Benefits $2.9 Occupancy Expense 0.3 Professional Fees / Outside Svcs. 2.8 IS and Communications 0.2 Other Operating Expenses 1.2 --- Total $7.4 Note: Full phase in expected in 2001. 7 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] EPS Analysis of Cost Saves Estimated cost saves of $7.4 million will generate approximately $0.10 per share(1) accretion once the cost saves have been fully implemented in 2001. (1) Utilizes 44.9 million shares and an effective tax rate of 38%. 8 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Pro Forma Balance Sheet (in thousands) - -------------------------------------- Data as of December 31, 1999 Pro forma NBT (1) BSB Combined ------- --- -------- Total Assets 2,378,408 2,240,948 4,619,356 Securities 747,399 401,723 1,149,122 Loans 1,463,217 1,722,252 3,185,469 Total Deposits 1,777,091 1,901,204 3,678,295 Total Equity 189,763 154,493 344,166 Shares Outstanding 44.9 million (1) Includes pending acquisition of Pioneer American Holding Company. 9 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Financial Ratios - ---------------- Based on annualized 4th qtr 1999 results Proforma NBT BSB Combined --- --- -------- ROAA 1.17 1.10 1.13 ROAE 12.56 15.26 14.08 NIM 4.82 4.23 4.46 Efficiency Ratio 56.83 41.38 47.66 Leverage Ratio 9.50 7.85 8.47 10 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Overview of Combined Market Area - -------------------------------- o 102 total branches serving 19 counties in 2 states o Commanding market presence in eight counties as measured by a deposit share rank of 1, 2, or 3 o Leading deposit share in Binghamton and Norwich. o Growing presence in the Syracuse and Scranton markets 11 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] [MAP OF MARKET AREA] 12 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Deposit Share and Rank by County - -------------------------------- County, State Deposit Rank ================================================================================ Broome, NY 56.5% 1 - -------------------------------------------------------------------------------- Chemung, NY 5.1% 6 - -------------------------------------------------------------------------------- Chenango, NY 84.4% 1 - -------------------------------------------------------------------------------- Clinton, NY 9.8% 4 - -------------------------------------------------------------------------------- Delaware, NY 33.9% 1 - -------------------------------------------------------------------------------- Essex, NY 25.0% 2 - -------------------------------------------------------------------------------- Fulton, NY 11.1% 4 - -------------------------------------------------------------------------------- Montgomery, NY 2.0% 6 - -------------------------------------------------------------------------------- Oneida, NY 5.3% 6 - -------------------------------------------------------------------------------- Onondaga, NY 4.7% 7 - -------------------------------------------------------------------------------- Otsego, NY 1.6% 7 - -------------------------------------------------------------------------------- Oswego, NY 0.4% 11 - -------------------------------------------------------------------------------- Tioga, NY 21.2% 2 - -------------------------------------------------------------------------------- Lackawanna, PA 11.5% 3 - -------------------------------------------------------------------------------- Luzerne, PA 0.9% 16 - -------------------------------------------------------------------------------- Monroe, PA 3.2% 6 - -------------------------------------------------------------------------------- Pike, PA 18.6% 3 - -------------------------------------------------------------------------------- Wayne, PA 17.9% 3 - -------------------------------------------------------------------------------- Wyoming,PA 0.6% 6 ================================================================================ 13 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Summary of One Time Expenses Charges (In Millions) - --------- ------------- Professional Fees $7 to 8 Severance 3 Data Processing 3 to 5 Other 2 ------- Total $15 to $18 14 [BSB LOGO OMMITTED] [NBT LOGO OMITTED] Reasons to Invest in the New Company o Expected to be accretive to EPS in first full year o Similar corporate cultures that will be easily integrated o Increased operating efficiencies o Building on each other's strength through cross selling opportunities 15