This study examines the relationship between monitoring and evaluation (M&E), project implementation management system (PIMS) for financial monitoring, and project performance within the framework of the resource-based view (RBV), dynamic capabilities, and knowledge management theory. It focuses on non- profit projects in a developing context, particularly in countries such as Bosnia and Herzegovina (BiH). Developmental assistance and non-profit projects have an important role to play in the economic performance of developing countries. The research highlights the significance of understanding factors influencing project performance in non-profit projects in developing countries such as BiH. The findings indicate that both M&E and PIMS for financial monitoring significantly influence three key knowledge management processes - knowledge internalization, knowledge accumulation, and knowledge transfer and integration, which in turn positively influence project performance. The study underscores the importance of synergy between M&E, PIMS, and knowledge management for enhancing project performance, offering valuable insights for policymakers, donors, the international community, and academia.