EXHIBIT 12.1 CENTRAL POWER AND LIGHT COMPANY (CONSOLIDATED) RATIO OF EARNINGS TO FIXED CHARGES FOR THE TWELVE MONTHS ENDED MARCH 31,1999 (Thousands Except Ratio) (Unaudited) Operating Income $283,166 Adjustments Income taxes 127,956 Provision for deferred income taxes (11,480) Deferred investment tax credits (3,858) Other income and deductions (1,041) Allowance for borrowed and equity funds Used during construction 3,007 --------- Earnings $397,750 ========= Fixed Charges: Interest on long-term debt $ 92,630 Interest on short-term debt and other 14,963 Distributions on Trust Preferred Securities 12,000 --------- Fixed Charges $119,593 ========= Ratio of Earnings to Fixed Charges 3.33 =========