EXHIBIT 12(a) HAWAIIAN ELECTRIC COMPANY, INC. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES NINE MONTHS ENDED SEPTEMBER 30, YEARS ENDED DECEMBER 31, -------------------- -------------------------------------------------------- 1998 1997 1997 1996 1995 1994 1993 ---- ---- ---- ---- ---- ---- ---- (DOLLARS IN THOUSANDS) FIXED CHARGES Total interest charges ............. $ 36,784 $ 36,551 $ 48,778 $ 47,451 $ 44,377 $ 37,340 $ 35,287 Interest component of rentals ...... 552 577 757 690 672 808 970 Pretax preferred stock dividend requirements of subsidiary ........ 3,062 3,125 4,150 4,358 4,494 4,651 3,425 Preferred securities distributions of trust subsidiary................ 3,019 2,046 3,052 0 0 0 0 -------- -------- -------- -------- -------- -------- -------- TOTAL FIXED CHARGES ................ $ 43,417 $ 42,299 $ 56,737 $ 52,499 $ 49,543 $ 42,799 $ 39,682 ======== ======== ======== ======== ======== ======== ======== EARNINGS Income before preferred stock dividends of HECO ................. $ 65,519 $ 60,500 $ 81,849 $ 85,213 $ 77,023 $ 65,961 $ 56,126 Fixed charges, as shown ............ 43,417 42,299 56,737 52,499 49,543 42,799 39,682 Income taxes (see note below) ...... 42,213 38,824 52,535 55,888 50,198 43,588 36,897 Allowance for borrowed funds used during construction ............... (5,145) (4,658) (6,190) (5,862) (5,112) (4,043) (3,869) -------- -------- -------- -------- -------- -------- -------- EARNINGS AVAILABLE FOR FIXED CHARGES $146,004 $136,965 $184,931 $187,738 $171,652 $148,305 $128,836 ======== ======== ======== ======== ======== ======== ======== RATIO OF EARNINGS TO FIXED CHARGES 3.36 3.24 3.26 3.58 3.46 3.47 3.25 ======== ======== ======== ======== ======== ======== ======== NOTE: Income taxes is comprised of the following Income tax expense relating to operating income for regulatory purposes ........................ $ 42,253 $ 38,848 $ 52,795 $ 56,170 $ 50,719 $ 43,820 $ 37,007 Income tax benefit relating to nonoperating loss ............... (40) (24) (260) (282) (521) (232) (110) -------- -------- -------- -------- -------- -------- -------- $ 42,213 $ 38,824 $ 52,535 $ 55,888 $ 50,198 $ 43,588 $ 36,897 ======== ======== ======== ======== ======== ======== ========