The non-institutionalised, flexible nature of living-apart-together (LAT) raises questions about partner commitment in the context of the debate about the individualisation of society. We explored how partner commitment in LAT relationships in the Netherlands is shaped by individuals’ satisfaction with, alternatives to, investments in and social support for their relationship. The underlying theoretical framework is an extended version of the Investment Model of Commitment. We conducted 22 semi-structured, in-depth interviews with men and women. The major themes that were addressed in the analysis were commitment, satisfaction, alternatives, investments, social support, relationship history and future plans. Participants were emotionally hi...