Exhibit 12(b)

PACCAR Financial Corp.

COMPUTATION OF RATIO OF EARNINGS TO FIXED
CHARGES

PURSUANT TO THE SUPPORT AGREEMENT

BETWEEN THE COMPANY AND PACCAR

(Millions of Dollars)



|                                   |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|---------------------------------- |  | ---------------------- | ----- |  | ---- | - | ----- | ---- |  | - | ----- |  |  | ---- | ----- |  |  | - | ----- | 
|                                   |  | Year ended December 31 |      
|                                   |  | 2010                   |       |  | 2009 |   |       | 2008 |  |   | 2007  |  |  | 2006 |      
|FIXED CHARGES                      |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|Interest expense                   |  | $                      | 90.5  |  |      | $ | 126.2 |      |  | $ | 160.1 |  |  | $    | 199.0 |  |  | $ | 163.9 | 
|Facility and equipment rental      |  |                        | 2.1   |  |      |   | 2.1   |      |  |   | 2.3   |  |  |      | 2.1   |  |  |   | 2.0   | 
|                                   |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|                                   |  |                        |       |  |     
|TOTAL FIXED CHARGES                |  | $                      | 92.6  |  |      | $ | 128.3 |      |  | $ | 162.4 |  |  | $    | 201.1 |  |  | $ | 165.9 | 
|                                   |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|                                   |  |                        |       |  |     
|EARNINGS                           |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|Income before taxes                |  | $                      | 63.2  |  |      | $ | 44.8  |      |  | $ | 71.6  |  |  | $    | 133.4 |  |  | $ | 136.3 | 
|Depreciation                       |  |                        | 132.4 |  |      |   | 122.3 |      |  |   | 107.8 |  |  |      | 90.3  |  |  |   | 79.2  | 
|                                   |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|                                   |  |                        | 195.6 |  |      |   | 167.1 |      |  |   | 179.4 |  |  |      | 223.7 |  |  |   | 215.5 | 
|                                   |  |                        |       |  |     
|FIXED CHARGES                      |  |                        | 92.6  |  |      |   | 128.3 |      |  |   | 162.4 |  |  |      | 201.1 |  |  |   | 165.9 | 
|                                   |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|                                   |  |                        |       |  |     
|EARNINGS AS DEFINED                |  | $                      | 288.2 |  |      | $ | 295.4 |      |  | $ | 341.8 |  |  | $    | 424.8 |  |  | $ | 381.4 | 
|                                   |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       | 
|                                   |  |                        |       |  |     
|RATIO OF EARNINGS TO FIXED CHARGES |  |                        | 3.11x |  |      |   | 2.30x |      |  |   | 2.10x |  |  |      | 2.11x |  |  |   | 2.30x | 
|                                   |  |                        |       |  |      |   |       |      |  |   |       |  |  |      |       |  |  |   |       |