The present study examined the relationship between the subjective well-being and prosocial behaviour of businessmen and professionals. The study also attempted to understand their income level in relation to their subjective well-being. 302 businessmen and professionals from different districts of Bihar, India, were selected using a purposive-cum-incidental sampling method. The participants' subjective well-being was measured using the Satisfaction with Life Scale (SWLS) developed by Diener et al. (1985) and Ed Diener et al.'s (2009) Scale of Positive and Negative Experience (SPANE). Caprara et al. (2012) developed the Prosocial scale, which contains 16 items, was used to measure their prosocial behaviour. The study found a partial relationship between subjective well-being and prosocial behaviour. However, a strong effect of income level on subjective well-being was also observed.