Several European countries face a shortage of general practitioners (GPs), in part due to GP attrition. Most studies of GP attrition have focussed on why GPs decide to leave. Yet understanding why GPs decide to remain may also elicit potential interventions to reduce attrition. This study examined GP graduates’ career trajectories and underlying decisions to elucidate the factors influencing GP attrition. We conducted semi-structured interviews of early to mid-career general practice graduates having completed training in Belgian French-speaking universities between 1999 and 2013. We sampled participants from three categories: full-time GPs, part-time GPs, no longer working as GPs. We analysed each participant’s career trajectory and broke it down into major phases. We performed thematic analysis of the factors influencing participants’ trajectories. We compared and contrasted trajectories to develop a typology of career trajectories. We identified six types of career trajectories: ‘stable’ (never considered ...