Help or hindrance? Day-level relationships between flextime use, work–nonwork boundaries, and affective well-being.

Flexible working time arrangements are becoming increasingly popular around the globe, but do they actually benefit employees?To address this question, we take a differentiated look at employees' day-specific use of flextime and its effect on the intersection of work and nonwork life.Specifically, we examined whether links between day-specific flextime use and affective well-being at work and at home can be explained by level of goal completion and the subjective boundaries around one's work and private life domains (i.e., the strength of work-nonwork boundaries).During 2 consecutive workweeks, 150 bank employees from various functions (Study 1) and a heterogeneous sample of 608 employees (Study 2) reported their day-specific use of flextime, boundary strength at work and home, and affective well-being in the evening and the next day.Multilevel structural equation modeling of 2,223 (Study 1) and 3,164 (Study 2) observations revealed that flextime use was associated with stronger boundaries at home in both studies and stronger boundaries at work in Study 2. Stronger boundaries were, in turn, positively associated with affective well-being, both in the same evening and the next day.Study 2 further revealed that day-specific nonwork goal completion mediated the positive association between daily flextime use and boundary strength at work.However, whereas occasional flextime use had unequivocal positive consequences, chronic flextime use undermined the completion of work goals.Overall, findings suggest that flextime use benefits employees when used in moderation.