This study examined the importance of school management in ensuring sustainable financial resource management in six selected secondary schools of Kasama District in Northern Province of Zambia. Effective financial management is critical for the smooth operation of schools and the provision of quality education. The study employed a descriptive research design using both qualitative and quantitative approaches. Data were collected from 36 respondents, including head teachers, bursars, teachers, and school board members, through questionnaires and interviews. Findings revealed that school management plays a crucial role in financial sustainability through budgeting, monitoring, accountability, and efficient allocation of resources. However, several challenges such as inadequate funding, lack of financial management skills, weak accountability systems, and poor planning were identified. The study recommends capacity building, improved financial policies, and the introduction of income-generating activities to enhance financial sustainability in schools.