Exhibit 11.1 FAIR, ISAAC AND COMPANY, INCORPORATED COMPUTATION OF EARNINGS PER SHARE (IN THOUSANDS EXCEPT PER SHARE DATA) Six-Months Ended Three-Months Ended March 31 March 31 ---------------------- ---------------------- 1997 1996 1997 1996 ---- ---- ---- ---- Primary Earnings Per Share: Weighted Average Common Shares Outstanding 12,637 12,343 12,672 12,357 Dilutive effect of outstanding options (as determined by the treasury stock method) 376 447 372 446 ---------- ---------- ---------- -------- Weighted Average Common Shares, as Adjusted 13,013 12,790 13,044 12,803 ========== ========== ========== ========== Net Income $ 9,577 $ 7,897 $ 5,093 $ 4,373 ========== ========== ========== ========== Primary Earnings per Share $ 0.74 $ 0.62 $ 0.39 $ 0.34 ========== ========== ========== ========== Fully Diluted Earnings Per Share: Weighted Average Common Shares Outstanding 12,637 12,343 12,672 12,357 Dilutive effect of outstanding options (as determined by the treasury stock method) 376 507 372 491 ---------- ---------- ---------- ---------- Weighted Average Common Shares, as Adjusted 13,013 12,850 13,044 12,848 ========== ========== ========== ========== Net Income $ 9,577 $ 7,897 $ 5,093 $ 4,373 ========== ========== ========== ========== Fully Diluted Earnings Per Share $ 0.74 $ 0.61 $ 0.39 $ 0.34 ========== ========== ========== ========== 14