EXHIBIT 12.1 SAN DIEGO GAS & ELECTRIC COMPANY COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Dollars in millions) For the six Months Ended 1994 1995 1996 1997 1998 6/30/99 -------- -------- -------- -------- --------- --------- Fixed Charges and Preferred Stock Dividends: Interest: Long-Term Debt $ 82 $ 82 $ 76 $ 70 $ 55 $25 Short-Term Debt 9 18 13 14 13 7 Rate Reduction Bonds -- -- -- -- 41 18 Amortization of Debt Discount and Expense, Less Premium 5 5 5 5 8 4 Interest Portion of Annual Rentals 9 10 8 9 8 3 -------- -------- -------- ------- --------- ---------- Total Fixed Charges 105 115 102 98 125 57 -------- -------- -------- -------- --------- ---------- Preferred Dividend Requirements 8 8 7 7 7 3 Ratio of Income Before Tax to Net Income 1.83501 1.78991 1.88864 1.91993 1.73993 1.47447 -------- -------- -------- -------- --------- ---------- Preferred Dividends for Purpose of Ratio 14 14 13 13 11 5 -------- -------- -------- -------- --------- ---------- Total Fixed Charges and Preferred Stock Dividends For Purpose of Ratio $119 $129 $115 $111 $136 $ 62 ======== ======== ======== ======== ========= ========= Earnings: Net Income (before preferred dividend requirements) $206 $219 $223 $238 $191 $102 Add: Fixed charges (from above) 105 115 102 98 125 57 Less: Fixed charges capitalized 1 2 1 2 1 1 Taxes on Income 172 173 198 219 141 49 -------- -------- -------- -------- --------- ---------- Total Earnings for Purpose of Ratio $482 $505 $522 $553 $456 $207 ======== ======== ======== ======== ========= ========== Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends 4.06 3.92 4.54 5.00 3.36 3.34 ======== ======== ======== ======== ========= ==========