EXHIBIT 12 COLUMBUS SOUTHERN POWER COMPANY Computation of Consolidated Ratios of Earnings to Fixed Charges (in thousands except ratio data) Year Ended December 31, ----------------------------------------------- 1995 1996 1997 1998 1999 Fixed Charges: Interest on First Mortgage Bonds. . . . . . . . $66,811 $59,711 $55,156 $47,323 $43,207 Interest on Other Long-term Debt. . . . . . . . 8,829 12,125 15,525 23,594 25,878 Interest on Short-term Debt . . . . . . . . . . 1,328 2,400 5,104 3,493 2,460 Miscellaneous Interest Charges. . . . . . . . . 4,657 4,374 4,729 4,459 4,659 Estimated Interest Element in Lease Rentals . . 4,100 __4,600 __4,100 5,300 4,600 ------- ----- ----- ------- ------- Total Fixed Charges. . . . . . . . . . . . $85,725 $83,210 $84,614 $84,169 $80,804 ======= ------- ======= ======= ======= Earnings: Net Income. . . . . . . . . . . . . . . . . . . $110,616 $107,108 $119,379 $133,044 $150,270 Plus Federal Income Taxes . . . . . . . . . . . 58,648 60,302 69,760 71,202 82,686 Plus State Income Taxes . . . . . . . . . . . . 7 11 6 3 89 Plus Fixed Charges (as above) . . . . . . . . . 85,725 _ 83,210 _ 84,614 84,169 80,804 -------- ------- ------- -------- -------- Total Earnings . . . . . . . . . . . . . . $254,996 $250,631 $273,759 $288,418 $313,849 ======== -------- ======== ======== ======== Ratio of Earnings to Fixed Charges. . . . . . . . 2.97 3,01 3.23 3.42 3.88 ==== ==== ==== ==== ====