EXHIBIT 12.1 PACCAR Financial Corp. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES PURSUANT TO SEC REPORTING REQUIREMENTS (Thousands of Dollars) Six Months Ended June 30 1996 1995 - -------------------------------------------------------------------------------- FIXED CHARGES Interest expense $49,234 $42,064 Portion of rentals deemed interest 122 120 - -------------------------------------------------------------------------------- TOTAL FIXED CHARGES $49,356 $42,184 - -------------------------------------------------------------------------------- EARNINGS Income before taxes $26,123 $21,775 Fixed charges 49,356 42,184 - -------------------------------------------------------------------------------- EARNINGS AS DEFINED $75,479 $63,959 - -------------------------------------------------------------------------------- RATIO OF EARNINGS TO FIXED CHARGES 1.53X 1.52X - -------------------------------------------------------------------------------- The method of computing the ratio of earnings to fixed charges shown above complies with SEC reporting requirements but differs from the method called for in the Support Agreement between the Company and PACCAR Inc. See Exhibit 12.2. -11-