This study aims to examine the effect of Work Life Balance on employee job satisfaction at PT Kaltim Diamond Coal. The research is based on the importance of achieving a balance between work and personal life to foster optimal job satisfaction. A quantitative approach with a simple linear regression method was employed. The sample consisted of 40 employees selected using a non-probability saturated sampling technique. Data were collected through questionnaires that had passed validity and reliability tests and analyzed using SPSS version 25. The results showed that Work Life Balance has a positive and significant effect on job satisfaction, indicated by a significance value of 0.025 (< 0.05) and a regression coefficient of 0.968. The coefficient of determination (R²) was 0.187, suggesting that 18.7% of the variation in job satisfaction is explained by Work Life Balance, while the remaining 81.3% is influenced by other factors not examined in this study. These findings highlight that improving Work Life Balance practices can serve as a strategic measure to enhance employee job satisfaction within the organization.
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