1 EXHIBIT 12(a) UNION ELECTRIC COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES 12 Months Year Ended December 31, Ended ------------------------------------------------------------- September 30, 1990 1991 1992 1993 1994 1995 ---- ---- ---- ---- ---- ---- (Thousands of Dollars Except Ratios) Net income for the Period $294,219 $321,512 $302,748 $297,160 $320,757 $305,530 -------- -------- -------- -------- -------- -------- Add: Taxes Based on income 191,532 218,954 197,009 182,716 203,827 196,875 -------- -------- -------- -------- -------- -------- Fixed Charges: Interest on Debt 183,215 163,061 125,798 124,430 135,608 129,605(*) Amortization of Premium and Discount, Less Expense on Debt; and Bond Defeasance Cost 4,369 4,148 9,521 5,170 5,504 5,503 Rentals (See note) 1,114 1,171 908 1,314 1,299 2,846 -------- -------- -------- -------- -------- -------- Total Fixed Charges 188,698 168,380 136,227 130,914 142,411 137,954 -------- -------- -------- -------- -------- -------- Earnings Available for Fixed Charges $674,449 $708,846 $635,984 $610,790 $666,995 $640,359 ======== ======== ======== ======== ======== ======== Ratio of Earnings to Fixed Charges 3.57 4.21 4.66 4.66 4.68 4.64 ==== ==== ==== ==== ==== ==== (*) Total annual interest charges on all bonds for the twelve months ended September 30, 1995 was $115,334,000. Note: Represents the interest factor applicable to rentals.