Based on 44 qualitative interviews with transnationally mobile people engaged in 28 different associations in Switzerland, this article tries to understand the motives behind the choice to volunteer, i.e. to actively and regularly engage in associations. These interviews reveal the great importance of associations in fostering inclusion in both the new living place and the place of origin. They further reveal that mobile people, no matter where they come from or why they are on the move, turn to associations for similar motives. In order of importance, they turn to associations to secure material advantages, to find ways of defining their identity in a manner that is both coherent and compatible with the host society and to socialize with people who are thought of as trustworthy.