Exhibit 12.3 Southwestern Electric Power Company Consolidated Ratio of Earnings to Fixed Charges For Years Ended December 31, 1999 1998 1997 1996 1995 --------------------------------------------------- (thousands, except ratios) Operating income $147,524 $150,787 $139,409 $138,083 $162,776 Adjustments Income taxes 55,343 62,595 44,396 32,931 41,131 Provision for deferred income taxes (17,098) (11,850) (2,244) 2,849 6,287 Deferred investment tax credits (4,565) (4,631) (4,662) (4,730) (4,786) Charges for investments and plant development costs, net of tax -- -- (483) (21,815) -- Other income and deductions (2,000) 1,115 3,578 312 178 Allowance for borrowed and equity funds used during construction 1,984 2,687 2,156 2,423 9,334 Interest portion of financing leases 335 598 1,194 1,514 1,896 --------------------------------------------------- Earnings $181,523 $201,301 $183,344 $151,567 $216,816 =================================================== Fixed charges: Interest on long-term debt $38,380 $39,233 $40,440 $44,066 $44,468 Distributions on Trust Preferred Securities 8,662 8,662 5,582 -- -- Interest on short-term debt & other 13,800 8,591 5,736 8,381 10,706 Interest portion of financing leases 335 598 1,194 1,514 1,896 --------------------------------------------------- Fixed Charges $61,177 $57,084 $52,952 $53,961 $57,070 =================================================== Ratio of earnings to fixed charges 2.97 3.53 3.46 2.81 3.80 4-18