The study explores the nexus of board capital and sustainability reporting. Panel data regression was employed on a sample of 80 Indian companies from FY 2016-17 to FY 2021-22. The results revealed that board education, experience, expertise and social connections positively impact sustainability reporting quality. This study expands the literature on the measurement of board attributes in terms of board capital to identify the director’s characteristics relevant to enhancing sustainability reporting quality in Indian companies. This would provide implications for practitioners and future researchers, especially in the context of emerging economies like India where institutional and regulatory environments are transitioning to inculcate sustainability in companies.