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, March 31, ________________________________________________ 1995 1994 1993 1992 1991 1990 _____________ ________ ________ ________ ________ ________ Net income. . . . . . . . . . . . . . . . . . . $ 81,312 $ 81,913 $ 84,011 $ 72,601 $ 75,683 $ 71,562 Add--Federal and state income taxes: Current . . . . . . . . . . . . . . . . . . . 39,194 38,097 50,441 6,110 36,316 39,380 Deferred (net). . . . . . . . . . . . . . . . 10,473 13,190 1,674 33,998 7,573 (2,964) Investment tax credit amortization. . . . . . (3,365) (3,367) (3,366) (3,336) (3,464) (3,306) Income tax applicable to nonoperating activities. . . . . . . . . . . . . . . . . 556 603 631 2,989 2,413 2,986 _______ _______ _______ _______ _______ _______ 46,858 48,523 49,380 39,761 42,838 36,096 _______ _______ _______ _______ _______ _______ Net income before income taxes. . . . . . . . . 128,170 130,436 133,391 112,362 118,521 107,658 _______ _______ _______ _______ _______ _______ Add--Fixed charges Interest on long-term debt. . . . . . . . . . 30,947 31,164 32,823 35,534 36,652 36,589 Interest on provision for revenue refunds . . - - - (803) 4,261 3,396 Other interest. . . . . . . . . . . . . . . . 769 358 479 392 1,231 1,070 Amortization of net debt premium and discount. . . . . . . . . . . . . . . . . . 1,681 1,678 1,598 863 338 326 _______ _______ _______ _______ _______ ________ 33,397 33,200 34,900 35,986 42,482 41,381 _______ _______ _______ _______ _______ ________ Earnings as defined . . . . . . . . . . . . . . $161,567 $163,636 $168,291 $148,348 $161,003 $149,039 ======= ======= ======= ======= ======= ======= Ratio of earnings to fixed charges. . . . . . . 4.84 4.93 4.82 4.12 3.79 3.60 Earnings required for preferred dividends: Preferred stock dividends . . . . . . . . . . $ 3,650 $ 3,510 $ 3,718 $ 4,549 $ 5,396 $ 5,617 Adjustment to pre-tax basis*. . . . . . . . . 2,103 2,079 2,185 2,491 3,054 2,833 _______ _______ _______ ______ _______ _______ $ 5,753 $ 5,589 $ 5,903 $ 7,040 $ 8,450 $ 8,450 _______ _______ _______ ______ _______ _______ Fixed charges plus preferred stock dividend requirements . . . . . . . . . . . . $ 39,150 $ 38,789 $ 40,803 $ 43,026 $ 50,932 $ 49,831 ======= ======= ======= ======= ======= ======= Ratio of earnings to fixed charges plus preferred stock dividend requirements . . . . 4.13 4.22 4.12 3.45 3.16 2.99 * 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-