The phenomenon of commuter workers in the Jabodetabek area, particularly users of the KRL Commuter Line, is often characterized by challenges stemming from long and exhausting daily travel. This study aims to examine the relationship between work–life balance and subjective well-being among commuter workers using the Jabodetabek KRL Commuter Line. The study population consisted of formal-sector commuter workers who regularly use the KRL Commuter Line, with a total of 104 participants selected through convenience sampling. The instruments used were the Work–Life Balance Scale (16 items; α = 0.872), the Satisfaction with Life Scale (5 items; α = 0.891), and the Positive and Negative Affect Schedule (19 items; α = 0.906). The results of simple regression analysis showed that work–life balance significantly predicted subjective well-being among commuter workers (β = 0.418, p = .001). Work–life balance explained 10.1% of the variability in subjective well-being (R² = 0.101; F(1, 102) = 11.46; p < .001). These findings indicate that the higher the level of work–life balance perceived by commuter workers, the higher their level of subjective well-being. Overall, this study underscores the importance of effectively managing the balance between work and personal life to help Jabodetabek KRL commuter workers maintain optimal subjective well-being.
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