T This research aims to analyze the determinants of performance among employees in Islamic banking in Indonesia, with work motivation as a mediating variable. The data were collected from 397 respondents using simple random sampling technique.The research method employed Structural Equation Modeling, with leadership style, organizational culture, and work environment as independent variables, and employee performance as the dependent variable, while work motivation served as the mediating variable.The results showed that leadership style directly influenced employee performance, while organizational culture and work environment did not have a direct impact on employee performance. Leadership style indirectly influenced employee performance through work motivation, whereas organizational culture and work environment, when mediated by work motivation, did not affect employee performance. The study found that effective leadership style is necessary to enhance employee performance. This suggests that in Islamic banking, leadership development is crucial to motivate and assist employees in achieving organizational goals.The novelty of this research lies in the Prophetic Leadership style, which is based on the leadership style of Prophet Muhammad (peace be upon him). Therefore, this study incorporates the dimensions of as-Shidiq (truthful), Amanah (trustworthy), Tabligh (communicative), and Fathanah (intelligent