EXHIBIT 12.1 SAN DIEGO GAS & ELECTRIC COMPANY COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Dollars in millions) 1995 1996 1997 1998 1999 -------- -------- -------- --------- --------- Fixed Charges and Preferred Stock Dividends: Interest: Long-Term Debt $ 82 $ 76 $ 69 $ 55 $ 49 Rate Reduction Bonds -- -- -- 41 35 Short-Term Debt & Other 18 13 14 14 40 Amortization of Debt Discount and Expense, Less Premium 5 5 5 8 7 Interest Portion of Annual Rentals 10 8 10 7 5 -------- -------- ------- --------- ---------- Total Fixed Charges 115 102 98 125 136 -------- -------- -------- --------- ---------- Preferred Dividend Requirements 8 6 6 6 6 Ratio of Income Before Tax to Net Income 1.78991 1.88864 1.91993 1.73993 1.63317 -------- -------- -------- --------- ---------- Preferred Dividends for Purpose of Ratio 14 13 13 11 10 -------- -------- -------- --------- ---------- Total Fixed Charges and Preferred Stock Dividends For Purpose of Ratio $129 $115 $111 $136 $146 ======== ======== ======== ========= ========= Earnings: Net Income (before preferred dividend requirements) $219 $222 $238 $191 $199 Add: Fixed charges (from above) 115 102 98 125 136 Less: Fixed charges capitalized 2 1 2 1 1 Taxes on Income 173 198 219 141 126 -------- -------- -------- --------- ---------- Total Earnings for Purpose of Ratio $505 $521 $553 $456 $460 ======== ======== ======== ========= ========== Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends 3.92 4.54 5.00 3.36 3.15 ======== ======== ======== ========= ==========