Exhibit 10.27 AMENDMENT #1 COMMUNITY BANK SYSTEM, INC. PENSION PLAN This sets forth Amendment #1 to the Community Bank System, Inc. Pension Plan, as amended and restated as of January 1, 2004 ("Plan"). Effective as of December 21, 2005, the Plan is amended as follows: 1. Section 5.2(a)(9) of the Plan is amended and restated to provide in its entirety as follows: (9) For Plan Years that begin on or after January 1, 2005, a Participant's annual Normal Retirement Benefit under the Traditional Formula shall equal the greater of the Normal Retirement Benefit determined under subparagraph 5.2(a) or the following amount: Participant (by Employee ID No.) Amount -------------------- ------ 98744 $ 40,897 68051 $168,725 93083 $178,508 Any Active Participant $ 0 described in subparagraphs 3.9(k), (l), (m), (n), or (o) All other Active Participants $ 660 Notwithstanding the dollar amounts set forth above, no Normal Retirement Benefit shall exceed the limits set forth in Paragraph 8.1. 2. Section 5.3(d) of the Plan is amended and restated to provide in its entirety as follows: (d) (1) Notwithstanding the other provisions of this Paragraph 5.3, for Plan Years beginning on or after January 1, 2005, the annual Normal Retirement Benefit payable to the following Participants shall not be less than the following amounts, except as may be limited under Article VIII: 1 Participant (by Employee ID No.) Minimum Benefit 98840 $283,041 3952 $100,000 3426 $65,162 (2) Notwithstanding the other provisions of this Paragraph 5.3, the opening Account balance on January 1, 2004 for the Plan Participant with Employee ID No. 1026 shall be $153,548. (3) Notwithstanding the other provisions of this Paragraph 5.3, the Account balance on December 31, 2005 for the Plan Participant with Employee ID No. 3398 shall be $72,528. (4) Notwithstanding the other provisions of this Paragraph 5.3, the Account balance on December 31, 2005 for the Plan Participant with Employee ID No. 4225 shall be $28,397. 5) Notwithstanding the other provisions of this Paragraph 5.3, the Account balance on December 31, 2005 for the Plan Participant with Employee ID No. 1438 shall be $155,137. 3. Section 5.3(e) of the Plan is amended and restated to provide in its entirety as follows: (e) In addition to the Accrued Benefit determined pursuant to Paragraph 5.2 or the other provisions of Paragraph 5.3, each Participant identified below shall have a supplemental Account balance, as of December 31, 2005, determined as follows: Supplemental Account Participant Balance (by Employee ID No.) As of December 31, 2005 -------------------- ----------------------- 4577 $36,479 98890 $38,412 98744 $42,147 1438 $50,009 2 4225 $19,896 908 $28,664 45999 $78,696 49575 $23,106 57770 $ 5,450 68051 $348,138 3427 $ 9,645 2996 $26,058 3398 $58,512 93083 $275,731 The supplemental Account balance provisions in this subparagraph (e) shall apply to each listed Participant regardless of the election (or deemed election) made by the Participant pursuant to Paragraph 5.1. The supplemental Account balance described in this subparagraph (e) shall not be increased by any Service Credits described in subparagraphs 5.3(b) or (c) or by the Interest Credit described in subparagraph 5.3(f). Pursuant to resolutions adopted by the Board of Directors of Community Bank System, Inc. on December 21, 2005, this Amendment #1 has been executed by a duly authorized officer of Community Bank System, Inc. on this 29th day of December, 2005. COMMUNITY BANK SYSTEM, INC. By: /s/ Mark E. Tryniski ----------------------------- 3