Using propensity score matching, this study examines the effects of migration on various indicators of household wellbeing in Cambodia. The results indicate that migration would reduce poverty headcount rate by 3–7 percentage points and decrease the depth of poverty. Migration is also found to reduce by 5–10 percent the hours worked by members left-behind. The impact of migration on labour participation may be, however, vulnerable to unobservable factors. Nevertheless, the study suggests that important heterogeneous effects which differ from the average impact exist. The analysis is conducted separately by internal and international migration.