1 \ EXHIBIT 12.0 TRENWICK GROUP INC. COMPUTATION OF CONSOLIDATED RATIO OF EARNINGS TO FIXED CHARGES Year Ended December 31, --------------------------------------------------------------- 1998 1997 1996 1995 1994 ------- ------- ------- ------- ------- (dollars in thousands) Earnings: Net income $34,792 $35,252 $33,848 $29,841 $20,282 Extraordinary loss on debt redemption, net of $558 income tax benefit -- 1,037 -- -- -- Income taxes 8,245 11,241 9,980 8,572 2,753 ------- ------- ------- ------- ------- Income before income taxes and extraordinary item 43,037 47,530 43,828 38,413 23,035 Fixed charges (as below) 14,492 10,140 6,826 6,805 6,785 ------- ------- ------- ------- ------- Earnings (for ratio calculation) $57,529 $57,670 $50,654 $45,218 $29,820 ======= ======= ======= ======= ======= Fixed charges: Interest expense $ 3,954 $ 894 $ 6,503 $ 6,496 $ 6,469 Minority interest 9,702 8,920 -- -- -- Portion of rental expense which approximates the interest factor 836 326 323 309 316 ------- ------- ------- ------- ------- Total fixed charges $14,492 $10,140 $ 6,826 $ 6,805 $ 6,785 ======= ======= ======= ======= ======= Ratio of earnings to fixed charges 4.0 5.7 7.4 6.6 4.4 ======= ======= ======= ======= ======= For purposes of computing the consolidated ratio of earnings to fixed charges, "earnings" represent income before income taxes and extraordinary item and fixed charges. "Fixed charges" include gross interest expense (other than on deposits), minority interest and the proportion deemed representative of the interest factor of rent expense.