Exhibit 11.01 CSG SYSTEMS INTERNATIONAL, INC. STATEMENT OF NET INCOME (LOSS) PER COMMON AND EQUIVALENT SHARE For the three months ended March 31, 1997: Weighted average common shares outstanding......... 25,489,258 ----------- Shares used in computation......................... 25,489,258 =========== Net income......................................... $ 1,164,000 =========== Net income per common and equivalent share......... $ .05 =========== For the three months ended March 31, 1996: Weighted average common shares outstanding......... 10,987,296 Common equivalent shares attributable to: Redeemable convertible Series A Preferred Stock.. 12,461,537 ----------- Shares used in computation......................... 23,448,833 =========== Loss before extraordinary item..................... $(6,503,000) Extraordinary loss from early extinguishment of debt............................................. (1,260,000) ----------- Net loss........................................... $(7,763,000) =========== Net loss per common and equivalent share: Before extraordinary item........................ $ (.28) Extraordinary loss from early extinguishment of debt........................................... (.05) ----------- Net loss......................................... $ (.33) ===========