CDW (CDW) 8-K CDW Corporation Announces Partial Redemption of

EXHIBIT 12.1

CDW CORPORATION

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(unaudited)

	Year ended December 31,												Nine months ended September 30,
(dollars in millions)	2009			2010			2011		2012		2013		2013		2014
Computation of earnings:
Income (loss) before income taxes and adjustment for (income) loss from equity investees	$	(461.2	)	$	(37.1	)	$	28.3	$	185.8	$	194.9	$	112.6	$	306.6
Distributed income from equity investees		—			0.2			0.5		1.2		1.0		0.9		1.1
Fixed charges		413.1			420.7			324.9		312.4		254.3		202.0		151.7
Total earnings	$	(48.1	)	$	383.8		$	353.7	$	499.4	$	450.2	$	315.5	$	459.4
Computation of fixed charges:
Interest expense	$	389.3		$	394.7		$	302.0	$	294.4	$	241.8	$	191.9	$	144.2
Amortization of deferred financing costs and debt premium		16.2			18.0			15.7		13.6		8.8		7.1		4.8
Portion of rent expense representative of interest(1)		7.6			8.0			7.2		4.4		3.7		3.0		2.7
Total fixed charges	$	413.1		$	420.7		$	324.9	$	312.4	$	254.3	$	202.0	$	151.7
Ratio of earnings to fixed charges		(2	)		(2	)		1.1		1.6		1.8		1.6		3.0

(1) Fixed charges include a reasonable estimation of the interest factor included in rental expense.

(2) For the years ended December 31, 2009 and 2010, earnings available for fixed charges were inadequate to cover fixed charges by $461.2 million and $37.0 million, respectively.