Applying latent class analysis to a unique data source of 3,500 Polish migrants in Western Europe, we develop a new typology of Polish migrants under “free movement” following the 2004 expansion of the European Union. We characterize these diverse migrant types in terms of their premigration characteristics and link them to varied early social and economic integration outcomes. We show that alongside traditional circular and temporary labor migration, European Union expansion has given rise to new migrant types who are driven by experiential concerns, resulting in a more complex relationship between their economic and social integration in destination countries.