1 Exhibit 11.1 MASSBANK CORP. Earnings Per Share The following is a calculation of earnings per share for the years ended December 31, 1996, 1995 and 1994. Years Ended December 31, - -------------------------------------------------------------------------------- Calculation of Primary Earnings per Share (1) 1996 1995 1994 - -------------------------------------------------------------------------------- Average common shares outstanding 2,712,577 2,755,789 2,862,981 Shares assumed to be repurchased under treasury stock method for stock options 76,385 79,823 80,746 Less: Unallocated Employee Stock Ownership Plan ("ESOP") shares not committed to be released (2) (45,082) (51,679) ( 60,413) ---------- ---------- ---------- Total Shares 2,743,880 2,783,933 2,883,314 Net Income $9,427,000 $8,759,000 $8,185,000 ---------- ---------- ---------- Per Share Amount $3.44 $3.15 $2.84 Years Ended December 31, - -------------------------------------------------------------------------------- 1996 1995 1994 - -------------------------------------------------------------------------------- Calculation of Fully Diluted Earnings per Share (1) - -------------------------------------------------------------------------------- Average common shares outstanding 2,712,577 2,755,789 2,862,981 Shares assumed to be repurchased under treasury stock method for stock options 78,521 101,985 82,790 Less: Unallocated Employee Stock Ownership Plan ("ESOP") shares not committed to be released (2) (45,082) (51,679) (60,413) ________ ________ _______ Total Shares 2,746,016 2,806,095 2,885,358 Net Income $9,427,000 $8,759,000 $8,185,000 ---------- ---------- ---------- Per Share Amount $3.43 $3.12 $2.84 <FN> (1) The prior years' shares outstanding and earnings per share amounts have been restated to reflect the three-for-two stock split of September 9, 1994. (2) The Company adopted the American Institute of Certified Public Accountants ("AICPA") Statement of Position ("SOP") 93-6 effective January 1, 1994.