EXHIBIT 12.1 SAN DIEGO GAS & ELECTRIC COMPANY COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS (Dollars in millions) 1996 1997 1998 1999 2000 -------- -------- --------- --------- --------- Fixed Charges and Preferred Stock Dividends: Interest: Long-Term Debt $ 76 $ 69 $ 55 $ 49 $50 Rate Reduction Bonds -- -- 41 35 33 Short-Term Debt & Other 13 14 14 40 31 Amortization of Debt Discount and Expense, Less Premium 5 5 8 7 5 Interest Portion of Annual Rentals 8 10 7 5 3 -------- -------- ------- --------- ---------- Total Fixed Charges 102 98 125 136 122 -------- -------- -------- --------- ---------- Preferred Dividends for Purpose of Ratio (1) 13 13 11 10 13 -------- -------- -------- --------- --------- Total Fixed Charges and Preferred Stock Dividends For Purpose of Ratio $115 $111 $136 $146 $135 ======== ======== ======== ========= ========= Earnings: Pretax income from continuing operations $420 $457 $332 $325 $295 Add: Fixed charges (from above) 102 98 125 136 122 Less: Fixed charges capitalized 1 2 1 1 3 ------- -------- --------- --------- -------- Total Earnings for Purpose of Ratio $521 $553 $456 $460 $414 ======== ======== ======== ========= ======== Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends 4.54 5.00 3.36 3.15 3.07 ======== ======== ======== ========= ======== (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.