Exhibit 11 - Computation of Earnings Per Common Share TCF FINANCIAL CORPORATION AND SUBSIDIARIES Computation of Earnings Per Common Share (Dollars in thousands, except per-share data) (Unaudited) Computation of Basic Earnings Per Common Three Months Ended Nine Months Ended Share for Statements of Operations: September 30, September 30, - ---------------------------------------- ---------------------------- ------------------------- 1998 1997 1998 1997 ---- ---- ---- ---- Income applicable to common shareholders $ 36,581 $ 37,210 $ 116,675 $ 105,172 ------------ ----------- ----------- ----------- ------------ ----------- ----------- ----------- Weighted average common shares outstanding 87,133,594 85,124,188 89,157,432 82,398,577 ------------ ----------- ----------- ----------- ------------ ----------- ----------- ----------- Basic earnings per common share $ .42 $ .44 $ 1.31 $ 1.28 ------------ ----------- ----------- ----------- ------------ ----------- ----------- ----------- Computation of Diluted Earnings Per Common Share for Statements of Operations: - ------------------------------------------ Net income $ 36,581 $ 37,210 $ 116,675 $ 105,172 Add: Interest expense on 7 1/4% convertible subordinated debentures, net of tax - - - 132 ------------ ----------- ----------- ----------- Income applicable to common shareholders including effect of dilutive securities $ 36,581 $ 37,210 $ 116,675 $ 105,304 ------------ ----------- ----------- ----------- ------------ ----------- ----------- ----------- Weighted average number of common shares outstanding adjusted for effect of dilutive securities: Weighted average common shares outstanding used in basic earnings per common share calculation 87,133,594 85,124,188 89,157,432 82,398,577 Net dilutive effect of: Stock option plans 329,634 461,848 359,546 469,607 Restricted stock plans 510,015 852,244 503,458 838,903 Assumed conversion of 7 1/4% convertible subordinated debentures - - - 466,581 ----------- ----------- ----------- ----------- 87,973,243 86,438,280 90,020,436 84,173,668 ------------ ----------- ----------- ----------- ------------ ----------- ----------- ----------- Diluted earnings per common share $ .42 $ .43 $ 1.30 $ 1.25 ------------ ----------- ----------- ----------- ------------ ----------- ----------- -----------