EXHIBIT 12.1
CDW CORPORATION
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(unaudited)

| Years ended December 31,
(dollars in millions) | 2010 |  | 2011 |  | 2012 |  | 2013 |  | 2014
Computation of earnings: |  |  |  |  |  |  |  |  |
Income (loss) before income taxes and adjustment for (income) loss from equity investees | $ | (37.1 | ) |  | $ | 28.3 |  |  | $ | 185.8 |  |  | $ | 194.9 |  |  | $ | 385.5 |
Distributed income from equity investees | 0.2 |  |  | 0.5 |  |  | 1.2 |  |  | 1.0 |  |  | 1.1 |
Fixed charges | 420.7 |  |  | 324.9 |  |  | 312.4 |  |  | 254.3 |  |  | 202.8 |
Total earnings | $ | 383.8 |  |  | $ | 353.7 |  |  | $ | 499.4 |  |  | $ | 450.2 |  |  | $ | 589.4 |
Computation of fixed charges: |  |  |  |  |  |  |  |  |
Interest expense | $ | 394.7 |  |  | $ | 302.0 |  |  | $ | 294.4 |  |  | $ | 241.8 |  |  | $ | 191.3 |
Amortization of deferred financing costs and debt premium | 18.0 |  |  | 15.7 |  |  | 13.6 |  |  | 8.8 |  |  | 6.4 |
Portion of rent expense representative of interest (1) | 8.0 |  |  | 7.2 |  |  | 4.4 |  |  | 3.7 |  |  | 5.1 |
Total fixed charges | $ | 420.7 |  |  | $ | 324.9 |  |  | $ | 312.4 |  |  | $ | 254.3 |  |  | $ | 202.8 |
Ratio of earnings to fixed charges | (2 | ) |  | 1.1 |  |  | 1.6 |  |  | 1.8 |  |  | 2.9 |

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

(2) | For the year ended December 31, 2010, earnings available for fixed charges were inadequate to cover fixed charges by $37.0 million.