UNUM Corporation and Subsidiaries Form 10-Q June 30, 1998 EXHIBIT 12 COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Three Months Ended Six Months Ended June 30, June 30, ------------------ ---------------- (Unaudited - Dollars in millions) 1998 1997 1998 1997 - -------------------------------------------------------------------------------- Earnings: Income before income taxes $141.4 $126.4 $275.8 $298.1 Add: Fixed charges 14.7 13.3 29.0 26.0 - -------------------------------------------------------------------------------- Earnings as adjusted $156.1 $139.7 $304.8 $324.1 ================================================================================ Fixed charges: Interest expense $ 12.3 $ 10.6 $ 24.0 $ 20.8 Interest portion of rent expense 2.4 2.7 5.0 5.2 - -------------------------------------------------------------------------------- Total fixed charges $ 14.7 $ 13.3 $ 29.0 $ 26.0 ================================================================================ Ratio of earnings to fixed charges 10.6 10.5 10.5 12.5 ================================================================================ For purposes of computing the ratio of earnings to fixed charges, earnings as adjusted consist of income before income taxes and fixed charges. Fixed charges consist of interest expense and the estimated interest portion of rent expense.