EXHIBIT 12(C) BANK OF BOSTON CORPORATION COMPUTATION OF CONSOLIDATED RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDEND REQUIREMENTS (Excluding Interest on Deposits) The Corporation's ratios of earnings to combined fixed charges and preferred stock dividend requirements (excluding interest on deposits) for the five years ended December 31, 1996 were as follows: Years Ended December 31, ----------------------------------------------- (Dollars in millions) 1996 1995 1994 1993 1992 ----- ------ ----- ------ ---- Net income $ 650 $ 678 $ 542 $ 367 $ 338 Extraordinary items, net of tax 7 (73) Cumulative effect of changes in accounting principles, net of tax (24) Income tax expense 483 529 422 262 190 ----- ----- ----- ----- ---- Pretax earnings $ 1,133 $ 1,207 $ 971 $ 605 $ 455 ===== ===== ===== ===== ==== Fixed charges: Portion of rental expense (net of sublease rental income) which approximates the interest factor $ 40 $ 38 $ 35 $ 36 $ 37 Interest on borrowed funds 873 1,079 1,038 384 352 ----- ----- ----- ----- ---- Total fixed charges 913 1,117 1,073 420 389 Preferred stock dividend requirements 65 68 67 61 33 ----- ----- ----- ----- ---- Total combined fixed charges and preferred stock dividend requirements $ 978 $ 1,185 $ 1,140 $ 481 $ 422 ===== ===== ===== ===== ==== Earnings (for ratio calculation) (Pretax earnings plus total fixed charges) $ 2,046 $ 2,324 $ 2,044 $ 1,025 $ 844 ===== ===== ===== ===== ==== Ratio of earnings to combined fixed charges and preferred stock dividend requirements 2.09 1.96 1.79 2.13 2.00 ===== ===== ===== ===== ==== For purposes of computing the consolidated ratio of earnings to combined fixed charges and preferred stock dividend requirements "earnings" represent income before extraordinary items and cumulative effect of changes in accounting principles plus applicable income taxes and fixed charges. "Fixed charges" include gross interest expense (excluding interest on deposits) and the proportion deemed representative of the interest factor of rent expense, net of income from subleases. Pretax earnings required for preferred stock dividends were computed using tax rates for the applicable year.