The aim of this article is to theorize interactions between migrant transnationalism and integration using a multiscalar approach. For migrant transnationalism scholars, attention to simultaneity in transnational social fields is given. However, much migration research in Europe continues to suffer from an ‘integration bias’, which under-appreciates the salience of simultaneity within transnational social fields in many migrants’ lives, and implicitly assumes a zero-sum approach to societal membership. Drawing on interviews with migrants in Oslo (Norway) a multiscalar analytical approach is adopted. The salience of where things happen and how they are understood, depending on the perspective of involved actors, across time, space and position, emerges when using this multiscalar approach. Identifying the roles of nested, taxonomical, but also emergent and perspective scales allows a fresh theoretical engagement with interactions between migrant transnationalism and integration, showing how simultaneity and (productive) friction result from additive, synergistic and even apparently antagonistic interactions.