EXHIBIT 12 CATERPILLAR FINANCIAL SERVICES CORPORATION COMPUTATION OF RATIO OF PROFIT TO FIXED CHARGES (Unaudited) (Millions of Dollars) Three Months Ended March 31, March 31, 1999 1998 Profit $ 35 $ 24 Add: Provision for income taxes 20 13 Deduct: Equity in profit of - (1) partnerships Profit before taxes $ 55 $ 36 Fixed charges: Interest on borrowed funds $132 $106 Rentals at computed interest* 1 1 Total fixed charges $133 $107 Profit before taxes plus fixed Charges $188 $143 Ratio of profit before taxes plus fixed charges to fixed 1.41 1.34 charges *Those portions of rent expense that are representative of interest cost.