EXHIBIT 12 HOUSTON INDUSTRIES INCORPORATED AND SUBSIDIARIES COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES (THOUSANDS OF DOLLARS) Nine Twelve Months Ended Months Ended September 30, 1994 September 30, 1994 ------------------ ------------------ Fixed Charges as Defined: (1) Interest on Long-Term Debt .... $ 236,313 $ 325,954 (2) Other Interest ................ 40,607 43,806 (3) Preferred Dividends Factor of Subsidiary (line 12) .... 39,220 51,920 (4) Interest Component of Rentals Charged to Operating Expense 2,947 4,021 --------- ----------- (5) Total Fixed Charges ........... $ 319,087 $ 425,701 ========= =========== Earnings as Defined: (6) Income Before Cumulative Effect of Change in Accounting for Postemployment Benefits .... $ 396,791 $ 425,208 (7) Income Taxes .................. 226,486 236,805 (8) Fixed Charges (line 5) ........ 319,087 425,701 --------- ----------- (9) Earnings Before Income Taxes and Fixed Charges .......... $ 942,364 $ 1,087,714 ========= =========== Preferred Dividends Factor of Subsidiary: (10) Preferred Stock Dividends of Subsidiary ................. $ 24,981 $ 33,282 (11) Ratio of Pre-Tax Income to Net Income (line 6 plus line 7 divided by line 6) .. 1.57 1.56 --------- ----------- (12) Preferred Dividends Factor of Subsidiary (line 10 times line 11) ................... $ 39,220 $ 51,920 ========= =========== Ratio of Earnings to Fixed Charges (line 9 divided by line 5) ......... 2.95 2.56