INDIANAPOLIS POWER & LIGHT COMPANY EXHIBIT 12.1 Ratio of Earnings to Fixed Charges YEARS ENDED DECEMBER 31, --------------------------------------------- 1997 1996 1995 --------- --------- --------- (Thousands of Dollars) Earnings, as defined: Net income (1) $133,402 $122,588 $106,273 Income taxes 74,440 67,266 53,568 Fixed charges, as below 41,893 48,570 51,778 --------- --------- --------- Total earnings, as defined $249,735 $238,424 $211,619 ========= ========= ========= Fixed charges, as defined: Interest charges $ 41,721 $ 48,406 $ 51,596 Rental interest factor 172 164 182 --------- --------- --------- Total fixed charges, as defined $ 41,893 $ 48,570 $ 51,778 ========= ========= ========= Ratio of earnings to fixed charges 5.96 4.91 4.09 ========= ========= ========= (1) 1997 Net income excludes after-tax effect of cumulative effect of accounting change