Leaving the parental home is a key transition milestone, often coinciding with the adoption of major adult roles. Reaching it off-time may diminish young adults’ well-being due to non-compliance with the normative ages defining the ‘right’ time to leave. Indeed, the concept of ‘failure to launch’ in the literature underscores the crucial role of home-leaving timing on well-being, yet empirical investigation into the causal link between transitioning off-time and subjective well-being remains limited. This study, therefore, investigates how off-time home leaving and returning home relate to life satisfaction. Using rich prospective panel data spanning over thirty years from the British Household Panel Survey (BHPS) and Understanding Society (UKHLS), we employed fixed-effects regression models to esti-mate within-individual changes in life satisfaction associated with these residential moves. We also conducted an additional, exploratory analysis focusing on young adults who had not yet left home, examining changes in life satisfaction around objective and subjective social age thresholds. The main analyses yielded non-significant findings for both off-time home leaving and returning home. Crucial-ly, the exploratory analysis revealed a notable —yet modest— pattern for non-leavers: life satisfaction experiences a significant decline (0.17 points) in the years approaching and following the objective age threshold. These findings suggest the psychological cost of delayed independence is not driven by the residential move itself, but by the failure to meet internalised social timetables. We conclude that the pressure of age-graded norms is a more critical driver of young adult well-being than the event-timing of the transition.