In this paper we evaluate the effects of comprehensive adult education on wage earnings of long-term unemployed, an essentially unexplored issue. We use register data pertaining to a large sample of long-term unemployed in Sweden who enrolled in upper secondary comprehensive adult education. Estimates with propensity score matching indicate that more than one semester of study results in substantial increases in post program annual earnings for both males and females. According to our rough calculations, the social benefits of offering these individuals comprehensive education surpass the costs within five to seven years.