This study aims to analyze and verify the influence of leadership style, retention, and work–life balance on the organizational performance of KONI Kota Kupang, both partially and simultaneously. The research employed a quantitative method using a survey, confirmatory, and verificative approaches. This study is classified as an associative study that examines relationships among variables. The population consisted of 93 organizational administrators, all of whom were included as research samples using a saturated sampling technique. The data comprised primary and secondary data collected through observation, questionnaire-based interviews, and documentation. Data were analysed using SPSS version 30 with multiple linear regression. The findings indicate that leadership style, retention, and work–life balance have a positive and significant effect on organizational performance, both partially and simultaneously. Together, the three variables contribute strongly (72.8%) to organizational performance. The implications of these findings include organizational leadership reform, strengthening of the organizational retention system, integration of work–life balance programs into management practices, organizational professionalization through evidence-based management, enhancement of organizational competitive advantages, and improvement of organizational culture.