This paper studies how expected career and non-career returns shape migration decisions among highly educated young adults from lagging regions in advanced economies. I collect data on subjective expectations under three counterfactuals: no migration, return migration, and long-term migration. First, I show that individuals anticipate significant trade-offs between effects on career and non-career outcomes. Second, I separate preferences from beliefs by incorporating these ex-ante returns into a life-cycle utility model. Results reveal that personal life factors play a larger role than career considerations in choices and welfare. Third, I perform counterfactual exercises to study the reasons for planning to return, and estimate the cost of promoting this choice among those initially preferring the other options, focusing on differences by ability. My findings help inform the design of policies incentivizing return migration in lagging regions, a way to encourage early-career skill acquisition while retaining talent. A follow-up survey conducted four years later validates the methodology, confirming a strong link between expectations and realizations.Presented at: SAEe (Valencia, December 2022), SOLE (Philadelphia, May 2023), BSE Summer Forum (Barcelona, June 2023), Workshop on Subjective Expectations (Bocconi-Milan, June 2023), Workshop on Migration and Family Economics (IESEG-Paris, June 2023), EEA-ESEM (Barcelona, August 2023), EALE (Prague, September 2023), WB-IDB HUMANS Seminar (Washington, March 2024), CUNEF Universidad (Madrid, April 2024)