Although duration of untreated psychosis (DUP) predicts treatment outcome as assessed by symptoms in first-episode psychosis, there is much less evidence concerning its relation to social functioning. We present the results of a prospective study of 163 first-episode psychosis patients examining occupational activity at three years, after initiation of treatment. Both shorter DUP and higher social support were significantly associated with more full time occupational activity at follow-up. The findings suggest the importance of reducing treatment delay and increasing social support in order to improve occupational outcomes for those with first-episode psychosis.