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 June 30, 1995 1996 1997 1998 1999 2000 --------- -------- -------- --------- --------- --------- Fixed Charges and Preferred Stock Dividends: Interest: Long-Term Debt $ 82 $ 76 $ 69 $ 55 $ 49 $25 Rate Reduction Bonds -- -- -- 41 35 16 Short-Term Debt & Other 18 13 14 14 40 32 Amortization of Debt Discount and Expense, Less Premium 5 5 5 8 7 2 Interest Portion of Annual Rentals 10 8 10 7 5 2 --------- -------- -------- ------- --------- ---------- Total Fixed Charges 115 102 98 125 136 77 --------- -------- -------- -------- --------- ---------- Preferred Dividends for Purpose of Ratio (1) 14 13 13 11 10 6 --------- -------- -------- -------- --------- ---------- Total Fixed Charges and Preferred Stock Dividends For Purpose of Ratio $129 $115 $111 $136 $146 $83 ========== ======== ======== ======== ========= ========== Earnings: Net Income (before preferred dividend requirements) $219 $222 $238 $191 $199 $95 Add: Fixed charges (from above) 115 102 98 125 136 77 Less: Fixed charges capitalized 2 1 2 1 1 - Taxes on Income 173 198 219 141 126 90 --------- - ------- -------- --------- --------- ---------- Total Earnings for Purpose of Ratio $505 $521 $553 $456 $460 $262 ========= ======== ======== ======== ========= ========== Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends 3.92 4.54 5.00 3.36 3.15 3.16 ========= ======== ======== ======== ========= ========== (1) In computing this ratio, "Preferred dividends" represents the before-tax earnings necessary to pay such dividends, computed at the effective tax rates for the applicable periods.