Purpose: This paper examined the adoption and effective of results-based management in the Non-profit organisation in Zambia. The adoption of RBM in the non-profit sector globally has been the subject of increasing attention in the literature. Limited research has been conducted on the adoption and effectiveness of Results-Based Management (RBM) in the non-profit sector within the Zambian context. Methodology: The study adopted a phenomenological qualitative research design. The study was done in Lusaka and involved two Non-Governmental Organisations (NGO): World Vision and Care International Zambia. The study had a sample size of 20 sampled using purposive sampling technique. The study adopted thematic approach to data analysis. Findings: The findings revealed a positive impact on resource utilisation and efficiency within two NGOs; World Vision and Care International Zambia. Both Organisations report improved efficiency in resource allocation, emphasizing strategic planning and focused activities contributing to program outcomes. While acknowledging overall gains, challenges in optimizing specific resources such as technology and training were recognized. Continuous training and capacity-building emerged as crucial, emphasizing the human resource aspect of RBM success. Integration of financial data with programmatic outcomes and the need for a more comprehensive evaluation of long-term program sustainability were identified. Transparent resource utilization, equitable distribution, and effective communication with stakeholders were deemed essential for achieving consistent results. The study highlights RBM's complex impact on resource management, guiding Organisations toward more purposeful allocation and fostering a culture of continuous improvement.