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, June 30, _____________________________________________________________ 1996 1995 1994 1993 1992 1991 _____________ ________ ________ ________ ________ ________ Net income.................................... $ 77,024 $ 70,631 $ 81,913 $ 84,011 $ 72,601 $ 75,683 Add--Federal and state income taxes: Current.................................... 50,158 41,276 38,097 50,441 6,110 36,316 Deferred (net)............................ 2,590 5,627 13,190 1,674 33,998 7,573 Investment tax credit amortization....... (3,355) (3,361) (3,367) (3,366) (3,336) (3,464) Income tax applicable to nonoperating activities............................... 459 941 603 631 2,989 2,413 _______ _______ _______ _______ _______ _______ 49,852 44,483 48,523 49,380 39,761 42,838 _______ _______ _______ _______ _______ _______ Net income before income taxes............. 126,876 115,114 130,436 133,391 112,362 118,521 _______ _______ _______ _______ _______ _______ Add--Fixed charges Interest on long-term debt............... 31,415 31,168 31,164 32,823 35,534 36,652 Interest on provision for revenue refunds - - - - (803) 4,261 Other interest............................ 1,442 853 358 479 392 1,231 Amortization of net debt premium and discount................................. 1,718 1,703 1,678 1,598 863 338 _______ _______ _______ _______ _______ ________ 34,575 33,724 33,200 34,900 35,986 42,482 _______ _______ _______ _______ _______ ________ Earnings as defined......................... $161,451 $148,838 $163,636 $168,291 $148,348 $161,003 ======= ======= ======= ======= ======= ======== Ratio of earnings to fixed charges......... 4.67 4.41 4.93 4.82 4.12 3.79 Earnings required for preferred dividends: Preferred stock dividends................... $ 3,775 $ 3,850 $ 3,510 $ 3,718 $ 4,549 $ 5,396 Adjustment to pre-tax basis.............. 2,443 2,425 2,079 2,185 2,491 3,054 _______ _______ _______ _______ _______ _______ $ 6,218 $ 6,275 $ 5,589 $ 5,903 $ 7,040 $ 8,450 _______ _______ _______ _______ _______ _______ Fixed charges plus preferred stock dividend requirements...................... $ 40,793 $ 39,999 $ 38,789 $ 40,803 $ 43,026 $ 50,932 ======= ======= ======= ======= ======= ======= Ratio of earnings to fixed charges plus preferred stock dividend requirements.... 3.96 3.72 4.22 4.12 3.45 3.16 * 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 } -33-