EXHIBIT 12.3 Southwestern Electric Power Company Ratio of Earnings to Fixed Charges For Years Ended December 31, 1997 1996 1995 1994 1993 -------- -------- -------- -------- -------- (thousands, except ratios) Operating income $139,409 $138,083 $162,776 $145,922 $118,057 Adjustments: Income taxes 44,396 32,931 41,131 20,623 37,108 Provision for deferred income taxes (2,244) 2,849 6,287 22,248 (648) Deferred investment tax credits (4,662) (4,730) (4,786) (4,278) (5,193) Charges for investments and plant development costs, net of tax (483) (21,815) -- -- -- Other income and deductions 3,578 312 178 4,656 3,658 Allowance for borrowed and equity funds used during construction 2,156 2,423 9,334 6,097 2,580 Interest portion of financing leases 1,194 1,514 1,896 2,562 2,534 -------- -------- -------- -------- -------- Earnings $183,344 $151,567 $216,816 $197,830 $158,096 ======== ======== ======== ======== ======== Fixed charges: Interest on long-term debt $40,440 $44,066 $44,468 $43,395 $ 40,958 Distributions on Trust Preferred Securities 5,582 -- -- -- -- Interest on short-term debt and other 5,736 8,381 10,706 7,568 4,866 Interest portion of financing leases 1,194 1,514 1,896 2,562 2,534 -------- -------- -------- -------- -------- Fixed charges $52,952 $53,961 $57,070 $53,525 $ 48,358 ======== ======== ======== ======== ======== Ratio of earnings to fixed charges 3.46 2.81 3.80 3.70 3.27(1) (1) The ratio of earnings to fixed charges for 1993 was calculated before cumulative effect of change in accounting principles.