Exhibit 12(a)

PACCAR Inc

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

PURSUANT TO SEC REPORTING REQUIREMENTS

(Millions of Dollars)

	Year Ended December 31,
	2015		2014		2013		2012		2011
FIXED CHARGES
Interest expense	$	108.0	$	128.2	$	159.5	$	163.6	$	184.3
Portion of rentals deemed interest		5.4		5.3		6.6		3.7		4.7
TOTAL FIXED CHARGES	$	113.4	$	133.5	$	166.1	$	167.3	$	189.0
EARNINGS
Income before taxes	$	2,337.1	$	2,017.6	$	1,695.0	$	1,628.9	$	1,506.9
Fixed charges		118.4		137.2		160.1		160.2		180.7
EARNINGS AS DEFINED	$	2,455.5	$	2,154.8	$	1,855.1	$	1,789.1	$	1,687.6
RATIO OF EARNINGS TO FIXED CHARGES		21.65x		16.14x		11.17x		10.69x		8.93x