Exhibit 12 CENTRAL ILLINOIS PUBLIC SERVICE COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES PLUS PREFERRED STOCK DIVIDEND REQUIREMENTS BEFORE INCOME TAXES (in thousands) 12 Months Ended _______________________________________________________________ December 31, September 30, ________________________________________________ 1994 1993 1992 1991 1990 1989 _____________ ________ ________ ________ ________ ________ Net income. . . . . . . . . . . . . . . . . . . $ 82,101 $ 84,011 $ 72,601 $ 75,683 $ 71,562 $ 71,222 Add--Federal and state income taxes: Current . . . . . . . . . . . . . . . . . . . 54,321 50,441 6,110 36,316 39,380 45,464 Deferred (net). . . . . . . . . . . . . . . . (3,169) 1,674 33,998 7,573 (2,964) (2,774) Investment tax credit amortization. . . . . . (3,367) (3,366) (3,336) (3,464) (3,306) (3,288) Income tax applicable to nonoperating activities. . . . . . . . . . . . . . . . . 883 631 2,989 2,413 2,986 3,246 Income tax applicable to provision for prior period revenue refunds. . . . . . - - - - - (7,465) _______ _______ _______ _______ _______ _______ 48,668 49,380 39,761 42,838 36,096 35,183 _______ _______ _______ _______ _______ _______ Net income before income taxes. . . . . . . . . 130,769 133,391 112,362 118,521 107,658 106,405 _______ _______ _______ _______ _______ _______ Add--Fixed charges Interest on long-term debt. . . . . . . . . . 31,388 32,823 35,534 36,652 36,589 36,604 Interest on provision for revenue refunds . . - - (803) 4,261 3,396 3,432 Other interest. . . . . . . . . . . . . . . . 131 479 392 1,231 1,070 1,052 Amortization of net debt premium and discount. . . . . . . . . . . . . . . . . . 1,685 1,598 863 338 326 290 _______ _______ _______ _______ _______ _______ 33,204 34,900 35,986 42,482 41,381 41,378 _______ _______ _______ _______ _______ _______ Earnings as defined . . . . . . . . . . . . . . $163,973 $168,291 $148,348 $161,003 $149,039 $147,783 ======= ======= ======= ======= ======= ======= Ratio of earnings to fixed charges. . . . . . . 4.94 4.82 4.12 3.79 3.60 3.57 Earnings required for preferred dividends: Preferred stock dividends . . . . . . . . . . $ 3,498 $ 3,718 $ 4,549 $ 5,396 $ 5,617 $ 5,856 Adjustment to pre-tax basis*. . . . . . . . . 2,074 2,185 2,491 3,054 2,833 2,893 _______ _______ _______ ________ ______ _______ $ 5,572 $ 5,903 $ 7,040 $ 8,450 $ 8,450 $ 8,749 _______ _______ _______ ________ _______ _______ Fixed charges plus preferred stock dividend requirements . . . . . . . . . . . . $ 38,776 $ 40,803 $ 43,026 $ 50,932 $ 49,831 $ 50,127 ======= ======= ======= ======= ======= ======= Ratio of earnings to fixed charges plus preferred stock dividend requirements . . . . 4.23 4.12 3.45 3.16 2.99 2.95 * An additional charge equivalent to earnings required to adjust dividends on preferred stock to a pre-tax basis (See below.) { Net income before income taxes } { ______________________________ -100% } X preferred dividends = earnings required for preferred dividends { Net income } -31-