This study aims to analyze how the values of Islamic Work Ethics are implemented in employees’ work activities and how they contribute to improving employee performance. This study employs a qualitative approach using a case study design. Data collection was conducted through semi-structured interviews with five informants selected to represent each division, as well as through documentation including the company profile, various scientific articles, and videos relevant to the research topic. The results indicate that the implementation of Islamic Work Ethics at KB Bank Syariah Sidoarjo Branch began with the establishment of an Islamic work culture that serves as the foundation for various employee activities and actions. This study shows that the implementation of Islamic Work Ethics is perceived to make a positive contribution to supporting work performance and employee productivity. This contribution is evident in employees’ increased confidence in their work, a better understanding of products and procedures, and their ability to provide better service to customers. This study contributes to the development of human resource management by demonstrating that an Islamic work culture is the primary foundation for the formation of Islamic Work Ethics, while the implementation of Islamic Work Ethics is perceived as the primary mechanism that supports the quality of work performance.
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