This study assessed the competency of Barangay Treasurers and its relationship to their efficiency in financial transactions and compliance with Commission on Audit (COA) reportorial requirements in the Municipal Government of Los Baños, Laguna. A descriptive-correlational research design was employed, involving 100 respondents composed of barangay treasurers, elected officials, and personnel. Findings revealed that most respondents were young, predominantly female, and had 1–3 years of service. Barangay Treasurers demonstrated high competency in managing financial transactions and internal control systems, while computer and financial literacy were rated moderately high. In terms of efficiency, results showed a high level across timeliness, completeness, and accuracy of financial reports. Correlation analysis indicated a significant positive relationship between competency and efficiency, with internal control systems showing the strongest influence on reporting performance. The null hypothesis was therefore rejected. The study concludes that competency significantly affects efficiency in barangay financial management. It recommends continuous training, particularly in digital and financial literacy, along with strengthened internal control practices and the adoption of standardized systems to further improve reporting accuracy, accountability, and compliance.