India is the first country to introduce mandatory CSR spending for eligible firms, based on the revision of the Companies Act in 2013. In this paper, I explore the effects of the revision of the Companies Act in India on the like-lihood of a firm’s CSR participation and its profit. It is the first work to in-vestigate the effects of the provision of mandatory CSR. The results show that the revision increased the eligible firms’ CSR incurrence by 2.3 percent-age points, compared to ineligible firms. The findings also indicate that the revision is effective to increase the eligible firms’ profits by 3.5 percent, com-pared to the ineligible firms. Therefore, I suggest that profit-maximizing CSR and private provision of public goods through mandatory CSR are valid in India.