EXHIBIT 12.1 Central Power and Light Company Ratio of Earnings to Fixed Charges For Years Ended December 31, 1997 1996 1995 1994 1993 -------- -------- -------- -------- -------- (thousands, except ratios) Operating income $251,367 $285,647 $282,184 $256,251 $190,079 Adjustments: Income taxes 39,329 47,227 51,755 51,329 (18,954) Provision for deferred income taxes 34,484 51,476 (30,025) 26,659 90,520 Deferred investment tax credits (4,819) (5,553) (5,789) (5,789) (5,806) Charges for investments and plant development costs, net of tax (1,281) (15,569) -- -- -- Other income and deductions 7,834 3,997 14,880 1,272 1,663 Allowance for borrowed and equity funds used during construction 3,778 1,845 4,514 3,689 2,618 Mirror CWIP amortization -- -- 41,000 68,000 75,702 -------- -------- -------- -------- -------- Earnings $330,692 $369,070 $358,519 $401,411 $335,822 ======== ======== ======== ======== ======== Fixed charges: Interest on long-term debt $105,081 $110,375 $116,205 $111,408 $112,939 Interest on short-term debt and other 20,613 18,494 19,926 12,365 11,993 Distributions on Trust Preferred Securities 7,533 -- -- -- -- -------- -------- -------- -------- -------- Fixed charges $133,227 $128,869 $136,131 $123,773 $124,932 ======== ======== ======== ======== ======== Ratio of earnings to fixed charges 2.48 2.86 2.63 3.24 2.69(1) (1) The ratio of earnings to fixed charges for 1993 was calculated before cumulative effect of change in accounting principles.