1 Exhibit 11.1 MASSBANK CORP. Earnings Per Share The following is a calculation of earnings per share for the years ended December 31, 1995, 1994 and 1993. Years Ended December 31, - ------------------------------------------------------------------------------- Calculation of Primary Earnings per Share (1) 1995 1994 1993 - ------------------------------------------------------------------------------- Average common shares outstanding 2,755,789 2,862,981 2,934,849 Shares assumed to be repurchased under treasury stock method for stock options 79,823 80,746 72,963 Less: Unallocated Employee Stock Ownership Plan ("ESOP") shares not committed to be released (2) (51,679) ( 60,413) --- ---------- ---------- ---------- Total Shares 2,783,933 2,883,314 3,007,812 Net Income $8,759,000 $8,185,000 $6,695,000 ---------- ---------- ---------- Per Share Amount $3.15 $2.84 $2.23 Years Ended December 31, - ------------------------------------------------------------------------------- 1995 1994 1993 - ------------------------------------------------------------------------------- Calculation of Fully Diluted Earnings per Share (1) - ------------------------------------------------------------------------------- Average common shares outstanding 2,755,789 2,862,981 2,934,849 Shares assumed to be repurchased under treasury stock method for stock options 101,985 82,790 76,538 Less: Unallocated Employee Stock Ownership Plan ("ESOP") shares not committed to be released (2) (51,679) (60,413) --- ----------- ----------- ---------- Total Shares 2,806,095 2,885,358 3,011,387 ---------- --------- ---------- Net Income $8,759,000 $8,185,000 $6,695,000 ---------- ---------- ---------- Per Share Amount $3.12 $2.84 $2.22 2 (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.