1 EXHIBIT 12-13 THE DETROIT EDISON COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Nine Months Year Ended December 31 Ended ---------------------- 9/30/98 1997 1996 1995 ------- ---- ---- ---- (Millions, except for ratio) Net income $ 318 $ 417 $ 328 $ 434 -------- ------- ----- ----- Taxes based on income: Current income taxes 216 308 224 221 Deferred taxes - net 24 (6) 16 79 Investment tax credit adjustments - net (11) (14) (15) (17) Municipal and state 3 4 3 3 -------- ------- ----- ----- Total taxes based on income 232 292 228 286 -------- ------- ----- ----- Fixed charges: Interest on long-term debt 192 262 275 275 Amortization of debt discount, premium and expense 8 11 12 11 Other interest 8 9 4 10 Interest factor of rents 26 34 34 29 -------- ------- ----- ------- Total fixed charges 234 316 325 325 -------- ------- ----- ------- Earnings before taxes based on income and fixed charges $ 784 $ 1,025 $ 881 $ 1,045 ======== ======= ===== ======= Ratio of earnings to fixed charges 3.35 3.24 2.71 3.21