Flexible work practices (FWPs) give employees some control over when and where they work. Using boundary theory and role balance theory, this study proposes and tests a mediation model focusing on how the relationships between FWPs usage and employee outcomes (i.e., wellbeing and turnover intention) are mediated by work−life balance (WLB). It also tests the moderating role of employee age on the relationship between WLB and employee outcomes using socioemotional selectivity theory. The model was tested using survey data from 293 employees of an Australian for-profit organization. The findings indicate that FWPs usage is positively associated with WLB, WLB is positively associated with wellbeing and negatively with turnover intentions, and WLB partially mediates the relationships between FWPs usage and employee outcomes. The results provide partial support that employee age moderates the relationship between WLB and turnover intentions. Theoretical, research and practical contributions are discussed.