Exhibit 11.1 FAIR, ISAAC AND COMPANY, INCORPORATED COMPUTATION OF EARNINGS PER SHARE (IN THOUSANDS EXCEPT PER SHARE DATA) Three months ended December 31, ------------------------------- (unaudited) 1996 1995 --------- --------- Primary Earnings Per Share: Weighted Average Common Shares Outstanding 12,592 12,282 Dilutive effect of outstanding options (as determined by the treasury stock method) 379 479 --------- --------- Weighted Average Common Shares, as Adjusted 12,971 12,761 --------- --------- Net Income $ 4,484 $ 3,524 --------- --------- Primary Earnings per Share $ 0.35 $ 0.28 --------- --------- Fully Diluted Earnings Per Share: Weighted Average Common Shares Outstanding 12,592 12,282 Dilutive effect of outstanding options (as determined by the treasury stock method) 401 479 --------- --------- Weighted Average Common Shares, as Adjusted 12,993 12,761 --------- --------- Net Income $ 4,484 $ 3,524 ========= ========= Fully Diluted Earnings Per Share $ 0.35 $ 0.28 ========= ========= 14