EXHIBIT 12(d) BANKBOSTON CORPORATION COMPUTATION OF CONSOLIDATED RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDEND REQUIREMENTS (Including Interest on Deposits) The Corporation's ratios of earnings to combined fixed charges and preferred stock dividend requirements (including interest on deposits) for the five years ended December 31, 1997 were as follows: Years Ended December 31, --------------------------------------------------------------------- (Dollars in millions) 1997 1996 1995 1994 1993 ---- ---- ---- ---- ---- Net income $ 879 $ 650 $ 678 $ 542 $ 367 Extraordinary items, net of tax 7 Cumulative effect of changes in accounting principles, net of tax (24) Income tax expense 589 483 529 422 262 ----- ----- ----- ----- ----- Pretax earnings 1,468 1,133 1,207 971 605 ===== ===== ===== ===== ===== Fixed charges: Portion of rental expense (net of sublease rental income) which approximates the interest factor 39 40 38 35 36 Interest on borrowed funds 1050 873 1,079 1,038 384 Interest on deposits 1,685 1,680 1,791 1,301 1,177 ----- ----- ----- ----- ----- Total fixed charges 2,774 2,593 2,908 2,374 1,597 Preferred stock dividend requirements 53 65 68 67 61 ----- ----- ----- ----- ----- Total combined fixed charges and preferred stock dividend requirements $ 2,827 $ 2,658 $ 2,976 $ 2,441 $ 1,658 ===== ===== ===== ===== ===== Earnings (for ratio calculation) (Pretax earnings plus total fixed charges) $ 4,242 $ 3,726 $ 4,115 $ 3,345 $ 2,202 ===== ===== ===== ===== ===== Ratio of earnings to combined fixed charges and preferred stock dividend requirements 1.50 1.40 1.38 1.37 1.33 ===== ===== ===== ===== ===== 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 (including 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.