Background: This study focused on assessing the contribution of Business Development services on the financial performance of dairy cooperatives using a case study of selected dairy Cooperatives from Musanze district. The research questions focused on identification of the level of business development support services in selected dairy cooperatives, on assessing the level of financial performance of selected dairy cooperatives and to establish the relationship between Business Development Services and financial performance of selected dairy cooperatives. Materials and Methods: The targeted population was 339 members and employees of selected Dairy Cooperatives where a sample of 77 respondents was selected using simple random probability sampling techniques. The study employed a descriptive research design using a case study area and both quantitative and qualitative research methods were used. Sources of data included both primary data which was gathered using self-administered questionnaire and secondary data which were gathered from different text books, journals and existing documents on BDS. The data collected was analyzed using SPSS and statistical tools like numbers, frequencies and tables. Results: The model that was developed was found to be significant at 0.05. The results showed that there exist positive and significant correlations between the study variables. The R2 0.763 obtained showed that financial performance of the selected dairy cooperative is influenced by input services, training and technical assistance, infrastructure support and market access services provided by BDS at 76.3%. The researcher recommends that there is need to improve milk supply chain from the farmers to the final market to enhance performance.