The study examines the impact of firm governance mechanisms on integrated reporting considering the moderating role of earnings management of listed companies in sub-Saharan Africa (SSA) countries. Drawing insight from the agency, stakeholders, and legitimacy theories, we construct models that link the relationship. To test the hypotheses, we employed 334 listed companies in SSA countries from the years 2010 to 2022. Moreover, the study employed the generalized least square (GLS) estimator along with a battery of robustness and heterogeneity tests employing alternative estimators. The findings reveal that independent directors, gender diversity, age diversity, audit committee, and CSR committee recorded a positive link with integrated reporting. However, the CEO duality and ethics committee recorded a negative link with integrated reporting. In addition, the firm governance mechanism effectively promotes integrated reporting when earnings management exists in the firms. Finally, the findings indicate a significant heterogeneous impact on how international corporations and local firms practice corporate governance principles to impact IR. The study’s findings offer valuable insights for policymakers, regulators, and corporate managers, contributing to the broader understanding of corporate governance and integrated reporting in emerging markets.