This study examines the challenges of Integrated Financial Management Information System (IFMIS) on fiscal management of public funds in ministry departments in Malawi. The research objectives were to identify challenges faced by IFMIS users, analyse optimal resource allocation, and determine the overall impact of IFMIS on public financial management. Data was collected using questionnaires from 50 respondents across various departments. The results showed that lack of training, coordination, and delays in civil servant salaries were the primary challenges. Recommendations include intensive training for personnel and improvements in network infrastructure to optimize the system's effectiveness.