This paper explores experience of 'guilt' as a motivating emotion in the migrant process. Data are drawn from two major research projects with a focus on Italian transnational families comprising adult migrant children living in Australia and their ageing parents in Italy. Findings confirm Baumeister et al.'s (1994) three broad functions of guilt as relationship-enhancing; a tool for exerting influence over others; and a mechanism for alleviating inequities in relationships. The analysis extends this social relational understanding of guilt by locating it within the broader context of cultural processes to argue that a moral obligation to return is implicit in the migration process.