There is scarce or almost non-existing research on changes that take place in business schools in the Commonwealth of Independent States (CIS). Changes in CIS business schools (B-schools) are influenced by different external factors (e.g. socioeconomic system, market forces, financial crisis, demographic problems, changes in policies of higher education; influence of the Bologna process). On the other hand, B-schools in the CIS need to make internal changes to gain the external accreditation. We look into the nature of change processes taking place in CIS B-schools, observing them through the prism of ongoing external accreditation processes. The purpose of the study is to examine the effect of the accreditation process on CIS B-school changes. We used a comparative analysis based on the study of 22 Bschools from four countries (Russia, Belarus, Kazakhstan, and Kyrgyzstan). We discovered that these changes refer to introducing more strict entrance requirements, strengthening financial resources, and improving efforts to reach the accreditation standards. Moreover, schools have to review their mission, decrease their student-to-faculty ratio, introduce measurement metrics for learning goals, and internationalise their programs. The advanced B-schools in Russia and Kazakhstan usually start with an international programme accreditation, and then move to an institutional one. The trend has begun spreading to schools from non-Bologna countries like Belarus, but it is still a long-time agenda item for Kyrgyzstan.