Community Bank System, Inc. Statement re Earnings Per Share Computation Exhibit 11 Three Months Ended Year Ended December 31, December 31, 1996 1995 1996 1995 --------- --------- --------- ------ Primary Earnings Per Share Net Income 3,677,991 3,116,887 14,133,044 11,469,905 Dividends on preferred shares (101,250) (151,875) (405,000) (354,375) --------- --------- --------- --------- Income applicable to common stock 3,576,741 2,965,012 13,728,044 11,115,530 ========= ========= ========== ========== Weighted average number of common shares 3,728,789 3,675,921 3,741,259 3,261,205 Add: Shares issuable from assumed exercise of incentive stock options 49,577 36,848 37,653 32,561 ------ ------ ------ ------ Weighted average number of common shares - adjusted 3,778,366 3,712,769 3,741,259 3,261,205 ========= ========= ========= ========= Primary earnings per share $0.95 $0.80 $3.67 $3.41 ===== ===== ===== ===== Fully Diluted Earnings Per Share Income applicable to common stock 3,576,741 2,965,012 13,278,044 11,115,530 ========= ========= ========== ========== Weighted average number of common shares - adjusted 3,782,869 3,712,769 3,759,051 3,271,305 Add: Equivalent number of common shares assuming conversion of preferred Weighted average number of common shares - adjusted 3,782,869 3,712,769 3,759,051 3,271,305 ========= ========= ========= ========= Fully diluted earnings per share $0.95 $0.80 $3.65 $3.40 ===== ===== ===== =====