EXHIBIT 12 Caterpillar Financial Services Corporation Computation Of Ratio Of Profit To Fixed Charges (Unaudited) (Millions of Dollars) Three Months Nine months Ended Ended September September September September 30, 1999 30, 1999 30, 1998 30, 1998 Net Income $ 37 $ 35 $ 104 $ 84 Add: Provision for income taxes 21 22 58 50 Deduct: Equity in profit of partnerships (1) (1) (1) (2) Profit before taxes $ 57 $ 56 $161 $ 132 Fixed charges: Interest on borrowed funds $144 $136 $416 $366 Rentals at computed 1 1 3 3 interest* Total fixed charges $145 $137 $419 $369 Profit before taxes plus fixed charges $202 $193 $580 $501 Ratio of profit before taxes plus fixed charges to fixed charges 1.39 1.41 1.38 1.36 *Those portions of rent expense that are representative of interest cost.