The purpose of this study, performed in a Swedish municipality, was to obtain a view of early retirement pensioners, focusing on immigration and socio-economy as predictors of early retirement pensions. A questionnaire was sent to 453 early retirement pensioners with disorders of the musculoskeletal system. A corresponding questionnaire was sent to a randomly selected, age- and sex-matched control group of the same size. The response rate was 83%. The study concludes that immigration and low socio-economy are predictors of early retirement pension (ERP). The rate of immigrants was 19% among the ERPs compared to 5% among the controls. The early retired immigrants were comparatively young, and some of them were overqualified for their previous jobs. Of the ERPs 74% were blue-collar workers compared to 39% of the controls. Neither work satisfaction nor unemployment was found to predict ERP.