This paper examines whether participation in social activities is associated with higher levels of wellbeing among post-retirement age people in England, and, if so, whether these relationships are explained by the reciprocal nature of these activities. Cross-sectional analysis of relationships between social activities (including paid work, caring and volunteering) and wellbeing (quality of life, life satisfaction and depression) was conducted among participants of one wave of the English Longitudinal Study of Ageing (ELSA) who were of state pension age or older.