Washington Bancorp Computation of Earnings per Common Share Exhibit 11 For three months ended December 31, For six months ended December 31, ----------------------------------------- -------------------------------------------- 1997 1996 1997 1996 1997 1996 1997 1996 Basic Basic Diluted Diluted Basic Basic Diluted Diluted EPS EPS EPS EPS EPS EPS EPS EPS ---------------------------------------------------------------------------------------- Computation of weighted average number of common shares outstanding: Common shares outstanding at the beginning of the period ............ 651,133 657,519 651,133 657,519 651,133 657,519 651,133 657,519 Unreleased common shares held by the Employee Stock Ownership Plan (the "ESOP') at the beginning of the period ...................... (45,367) (49,349) (45,367) (49,349) (46,333) (50,433) (46,333) (50,433) Weighted average common shares released by the ESOP during the period ......................... 483 542 483 542 966 1,084 966 1,084 Weighted average common shares equivalent of dilutive effect of stock options ...................... -- -- 17,779 2,244 -- -- 16,838 890 ----------------------------------------------------------------------------------------- Weighted average number of common shares ............................. 606,249 608,712 624,028 610,956 605,766 608,170 622,604 609,060 ========================================================================================= Net income ........................... $ 199,230 $ 194,749 $ 199,230 $ 194,749 $ 356,450 $ 165,387 $ 356,450 $ 165,387 ========================================================================================= Net income per common share .......... $ 0.33 $ 0.32 $ 0.32 $ 0.32 $ 0.59 $ 0.27 $ 0.57 $ 0.27 =========================================================================================