Abstract: The purpose of this study is to determine the influence of monitoring and evaluation Systems on the performance of projects in non-governmental organizations: a case of development projects in Gitega, Burundi. It is built around the following objectives: (1) to assess how organizational structures for monitoring and evaluation influence on performance of non-governmental organizations; (2) to determine how human capacity for monitoring and evaluation influence performance of non-governmental organizations; (3) to examine the influence that project monitoring and evaluation plan has on performance of projects in non-governmental organizations; (4) to establish how a costed work plan for monitoring and evaluation influences performance of projects in non-governmental organizations.