CSG Systems International (CSGS) 10-Q 2009 Q2 Quarterly report

Exhibit 12.10

CSG Systems International, Inc.

Ratio of Earnings to Fixed Charges

(in thousands, except ratio)

	Six Months Ended June 30, 2009 (unaudited)
Income from continuing operations before income taxes	$	36,197
Interest on long-term and short-term debt, including amortization of original issue discount and deferred financing costs		7,275
Interest element of rentals		2,006
Total fixed charges		9,281
Earnings before income taxes and fixed charges	$	45,478
Ratio of earnings to fixed charges		4.90