Cumulative Grade Point Average (CGPA) of undergraduate students is very much important for their future career. So, it is essential to identify the determinants of CGPA of private university students in Bangladesh for building up their better career as well as greater interest of the country. In this study, data were collected from different private universities in Bangladesh. Multiple Classification Analysis (MCA) was used to find out the effect of determinants of CGPA of the students. It was found that the grand mean of the respondents’ CGPA was 3.2196. It was also found that respondents’ results of SSC, faculty, results of HSC, monthly expenditure, place of birth, semester dropped, family type, gender, fathers’ education and mothers’ education were first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth influencing factors on CGPA of the students of private universities respectively. These factors were not influencing alone but with joint impact of other variables on CGPA. The results revealed that the students with GPA 3.5+ in SSC had greater mean value (3.2559) than who had GPA <3.5 in SSC (2.8896).The results also showed that the respondents with GPA 3.5+ in HSC had greater mean value (3.2507) than who had GPA <3.5 in HSC (3.0261). Furthermore, the female respondents had higher mean value (3.2926) than the male respondents (3.1794). Based on the above results, it is suggested to the guardians and teachers of SSC and HSC level to take more attention about their children and students respectively to develop their future academic career. Authority of universities as well as guardians of the students should take special care to the academic performance of male students.