EXHIBIT 11 Page 1 of 2 THE INTERPUBLIC GROUP OF COMPANIES, INC. AND ITS SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (Amounts in Thousands Except Per Share Data) Three Months Ended September 30 ------------------------------- Basic 2000 1999 ------------ ------------ Net income $ 61,860 $ 67,775 Weighted average number of common shares outstanding 300,004 292,762 ============ ============ Earnings per common share $ .21 $ .23 ============ ============ Three Months Ended September 30 ------------------------------- Diluted 2000 1999 ------------ ------------ Net income $ 61,860 $ 67,775 Add: After tax savings on assumed conversion of subordinated debentures and notes -- -- Dividends paid net of related income tax applicable to restricted stock 184 163 ------------ ------------ Net income, as adjusted $ 62,044 $ 67,938 ============ ============ Weighted average number of common shares outstanding 300,004 292,762 Weighted average number of incremental shares in connection with restricted stock and assumed exercise of stock options 9,029 10,611 Assumed conversion of subordinated debentures and notes -- -- ------------ ------------ Weighted average common and common equivalent share 309,033 303,373 ============ ============ Earnings per common and common equivalent share $ .20 $ .22 ============ ============ Note: The computation of diluted EPS for 2000 and 1999 excludes the assumed conversion of the 1.87% and 1.8% Convertible Subordinated Notes because they were anti-dilutive. EXHIBIT 11 Page 2 of 2 THE INTERPUBLIC GROUP OF COMPANIES, INC. AND ITS SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (Amounts in Thousands Except Per Share Data) Nine Months Ended September 30 ------------------------------ Basic 2000 1999 ----------- ----------- Net income $ 235,994 $ 266,494 Weighted average number of common shares outstanding 296,113 291,832 =========== =========== Earnings per common share $ .80 $ .91 =========== =========== Nine Months Ended September 30 ------------------------------ Diluted 2000 1999 ----------- ----------- Net income $ 235,994 $ 266,494 Add: After tax interest savings on assumed conversion of subordinated debentures and notes -- 5,862 Dividends paid net of related income tax applicable to restricted stock 518 466 ----------- ----------- Net income, as adjusted $ 236,512 $ 272,822 =========== =========== Weighted average number of common shares outstanding 296,113 291,832 Weighted average number of incremental shares in connection with restricted stock and assumed exercise of stock options 9,825 10,765 Assumed conversion of subordinated debentures and notes -- 6,693 ----------- ----------- Weighted average common and common equivalent share 305,938 309,290 =========== =========== Earnings per common and common equivalent share $ .77 $ .88 =========== =========== Note: The computation of diluted EPS for 2000 excludes the assumed conversion of the 1.87% and 1.8% Convertible Subordinated Notes and for 1999 excludes the assumed conversion of the 1.87% Convertible Subordinated Notes, respectively, because they were anti-dilutive.