EXHIBIT 12(B) BANK OF BOSTON CORPORATION COMPUTATION OF CONSOLIDATED RATIO OF EARNINGS TO FIXED CHARGES (INCLUDING INTEREST ON DEPOSITS) The Corporation's ratios of earnings to fixed charges (including interest on deposits) for the nine months ended September 30, 1995 and 1994 and for the five years ended December 31, 1994 were as follows: NINE MONTHS ENDED SEPTEMBER 30, YEARS ENDED DECEMBER 31, ------------- ------------------------------------- 1995 1994 1994 1993 1992 1991 1990 ------ ------ ------ ------ ------ ------ ------ (DOLLARS IN MILLIONS) Net income (loss)........ $ 399 $ 315 $ 435 $ 299 $ 279 $ (113) $ (468) Extraordinary items, net of tax.................. 7 7 (73) (8) (44) Cumulative effect of changes in accounting principles, net of tax.. (24) Income tax expense (benefit)............... 335 254 349 215 153 (58) 3 ------ ------ ------ ------ ------ ------ ------ Pretax earnings (loss).. $ 734 $ 576 $ 791 $ 490 $ 359 $ (179) $ (509) ------ ------ ------ ------ ------ ------ ------ Fixed charges: Portion of rental expense (net of sublease rental income) which approximates the interest factor........ 21 20 27 27 28 30 39 Interest on borrowed funds................... 772 693 998 378 345 362 592 Interest on deposits..... 1,179 815 1,148 1,016 1,407 1,808 2,420 ------ ------ ------ ------ ------ ------ ------ Total fixed charges..... 1,972 1,528 2,173 1,421 1,780 2,200 3,051 ====== ====== ====== ====== ====== ====== ====== Earnings (for ratio calculation)............ $2,706 $2,104 $2,964 $1,911 $2,139 $2,021 $2,542 ====== ====== ====== ====== ====== ====== ====== Total fixed charges...... $1,972 $1,528 $2,173 $1,421 $1,780 $2,200 $3,051 ====== ====== ====== ====== ====== ====== ====== Ratio of earnings to fixed charges........... 1.37 1.38 1.36 1.34 1.20 .92 .83 ====== ====== ====== ====== ====== ====== ====== For purposes of computing the consolidated ratio of earnings to fixed charges "earnings" represent income (loss) 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. For the years ended December 31, 1991 and 1990, earnings were insufficient to cover fixed charges. Additional earnings necessary for the years ended December 31, 1991 and 1990 to bring the ratios of earnings to fixed charges to one-to-one basis are $179 million and $509 million, respectively.