ILLINOVA CORPORATION STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Twelve Three Months Ended Months Ended As Restated March March (Thousands of Dollars) 1999 1999 ** 1999 -------------------------- ------------- Earnings Available for Fixed Charges: Net Income (Loss) ($1,565,825) ($1,565,825) $21,870 Add: Income Taxes: Current (2,533) (2,533) - Deferred - Net (18,393) (18,393) 14,100 Allocated income taxes (7,393) (7,393) (2,410) Investment tax credit - deferred (6,897) (6,897) (365) Income tax effect of CPS impairment (1,143,252) (1,143,252) - Interest on long-term debt 118,972 118,972 31,085 Amortization of debt expense and premium-net, and other interest charges 33,528 33,528 12,041 One-third of all rentals (Estimated to be representative of the interest component) 4,002 4,002 946 Interest on in-core fuel 3,872 3,872 966 FAS 71 Regulatory Write-Offs - - - CPS Impairment - 2,666,909 - ------------ ----------- ------------- Earnings (loss) available for fixed charges ($2,583,919) $82,990 $78,233 ============ =========== ============= Fixed charges: Interest on long-term debt $118,972 $118,972 $31,085 Amortization of debt expense and premium-net, and other interest charges 41,410 41,410 13,860 One-third of all rentals (Estimated to be representative of the interest component) 4,002 4,002 946 ------------ ----------- ------------- Total Fixed Charges $164,384 $164,384 $45,891 ============ =========== ============= Ratio of earnings to fixed charges N/A * N/A 1.70 ============ =========== ============= * Earnings are inadequate to cover fixed charges. Additional earnings (thousands) of $2,748,303 are required to attain a one-to-one ratio of Earnings to Fixed Charges. ** Supplemental ratio of earnings to fixed charges presented to exclude write-off related to Clinton Impairment. Additional earnings (thousands) of $81,394 are required to attain a one-to-one ratio of Earnings to Fixed Charges. 8 ILLINOIS POWER COMPANY STATEMENT OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Twelve Three Months Ended Months Ended As Restated March March (Thousands of Dollars) 1999 1999 ** 1999 -------------------------- -------------- Earnings Available for Fixed Charges: Net Income (Loss) ($1,559,941) ($1,559,941) $22,911 Add: Income Taxes: Current (2,533) (2,533) - Deferred - Net (18,393) (18,393) 14,100 Allocated income taxes (2,249) (2,249) (2,121) Investment tax credit - deferred (6,897) (6,897) (365) Income tax effect of CPS impairment (1,143,252) (1,143,252) - Interest on long-term debt 108,562 108,562 28,523 Amortization of debt expense and premium-net, and other interest charges 32,179 32,179 11,384 One-third of all rentals (Estimated to be representative of the interest component) 4,002 4,002 946 Interest on in-core fuel 3,872 3,872 966 FAS 71 Regulatory Write-Offs - - - CPS Impairment - 2,666,909 - ------------- ------------ -------------- Earnings (loss) available for fixed charges ($2,584,650) $82,259 $76,344 ============= ============ ============== Fixed charges: Interest on long-term debt $108,562 $108,562 $28,523 Amortization of debt expense and premium-net, and other interest charges 40,061 40,061 13,203 One-third of all rentals (Estimated to be representative of the interest component) 4,002 4,002 946 ------------- ------------ -------------- Total Fixed Charges $152,625 $152,625 $42,672 ============= ============ ============== Ratio of earnings to fixed charges N/A * 0.54 1.79 ============= ============ ============== * Earnings are inadequate to cover fixed charges. Additional earnings (thousands) $2,737,275 are required to attain a one-to-one ratio of Earnings to Fixed Charges. ** Supplemental ratio of earnings to fixed charges presented to exclude write-off related to Clinton Impairment. Additional earnings (thousands) of $70,366 are required to attain a one-to-one ratio of Earnings to Fixed Charges. 9