EXHIBIT 12 CENTRAL POWER AND LIGHT COMPANY Computation of Consolidated Ratios of Earnings to Fixed Charges (in thousands except ratio data) Twelve Months Year Ended December 31, Ended 1997 1998 1999 2000 2001 6/30/02 Earnings: Income Before Extraordinary Item $128,423 $161,511 $187,718 $189,567 $184,787 $155,218 Plus Federal Income Taxes 39,329 126,738 83,508 80,797 174,073 152,769 Plus State Income Taxes - - - 3,532 14,849 10,495 Plus Provision for Deferred Income Taxes 34,458 (8,328) 19,938 16,263 (72,568) (72,972) Plus Deferred Investment Tax Credits (4,819) (3,858) (5,207) (5,207) (5,207) (5,207) Plus Fixed Charges 133,227 124,807 118,911 130,982 123,211 125,650 Total Earnings $330,618 $400,870 $404,868 $415,934 $419,145 $365,953 Fixed Charges: Interest on Long-term Debt $105,081 $ 93,301 $ 87,413 $ 96,212 $ 86,980 $ 95,342 Interest on Short-term Debt 20,613 19,506 19,498 22,830 25,023 19,549 Distributions on Trust Preferred Securities 7,533 12,000 12,000 11,940 11,208 10,759 Fixed Charges $133,227 $124,807 $118,911 $130,982 $123,211 $125,650 Ratio of Earnings to Fixed Charges 2.48 3.21 3.40 3.17 3.40 2.91