EXHIBIT 12 INDIANAPOLIS POWER & LIGHT COMPANY COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS Years Ended December 31, (in thousands, except ratios) ========================================================================= 1989 1990 1991 1992 1993 Fixed charges and preferred stock dividends, as defined: Interest on long-term debt $52,731 $47,877 $46,464 $42,663 $41,399 Other interest 602 1,755 2,596 1,251 2,305 Amortization of debt premium and expense -- net (737) 809 666 620 787 Estimated interest factor attributable to rents 552 509 420 301 164 ------------------------------------------------------------------------- Total fixed charges 53,148 50,950 50,146 44,835 44,655 Preferred stock dividends * 8,195 7,729 4,971 5,043 5,018 ------------------------------------------------------------------------- Total fixed charges and preferred stock dividends, as defined $61,343 $58,679 $55,117 $49,878 $49,673 ========================================================================= Earnings, as defined: Net income $94,471 $97,085 $103,866 $93,058 $102,766 Add: Federal and state income tax provisions 52,647 55,572 58,527 54,476 59,273 Fixed charges, as above 53,148 50,950 50,146 44,835 44,655 ------------------------------------------------------------------------- Total earnings, as defined $200,266 $203,607 $212,538 $192,369 $206,694 ========================================================================= Ratio of earnings to combined fixed charges and preferred stock dividends 3.26 3.47 3.86 3.86 4.16 ========================================================================= <FN> * Preferred stock dividends were increased to an amount representing the pre-tax earnings which would be required to cover such dividend requirements.