EXHIBIT 11.01 CSG SYSTEMS INTERNATIONAL, INC. STATEMENT OF NET INCOME PER COMMON AND EQUIVALENT SHARE Primary Fully Diluted ----------- ------------- For the three months ended September 30, 1997: Weighted average common shares outstanding.............. 25,509,522 25,509,522 Common equivalent shares attributable to outstanding stock options......................................... 776,059 1,035,320 ----------- ----------- Shares used in computation.............................. 26,285,581 26,544,842 =========== =========== Income before extraordinary item and discontinued operations............................................ $ 3,113,000 $ 3,113,000 Extraordinary loss from early extinguishment of debt.... (577,000) (577,000) Gain from disposition of discontinued operations........ 7,922,000 7,922,000 ----------- ----------- Net income.............................................. $10,458,000 $10,458,000 =========== =========== Net income per common and equivalent share: Before extraordinary item and discontinued operations......................................... $ .12 $ .11 Extraordinary loss from early extinguishment of debt.. (.02) (.02) Gain from disposition of discontinued operations...... .30 .30 ----------- ----------- Net income............................................ $ .40 $ .39 =========== =========== For the three months ended September 30, 1996: Weighted average common shares outstanding.............. 25,486,383 25,486,383 ----------- ----------- Shares used in computation.............................. 25,486,383 25,486,383 =========== =========== Net income.............................................. $ 948,000 $ 948,000 =========== =========== Net income per common and equivalent share: Net income............................................ $ .04 $ .04 =========== ===========