Purpose Motivated by the enactment of non-financial reporting regulations by the European Parliament, this paper aims to investigate the impact of European Union (EU) directive 2014/95/EU on the quantity of environmental, social and governance (ESG) disclosures by the S&P Europe 350 index firms. This study also investigates whether the implementation of the non-financial information (NFI) reporting regulations influences the association between ESG disclosures and firms’ earnings risk. Design/methodology/approach To measure the impact of mandatory regulations on the quantity of ESG disclosures, this study estimates the average treatment effects using a propensity weighted sample. Then this study uses the difference-in-differences method to estimate the differences in the association between ESG disclosures and earning risk before and after implementation of the EU directive. Findings The results show a significant positive impact of the EU directive on the quantity of ESG disclosures for the sample European public-interest entities, which indicates that the mandatory NFI reporting requirements could boost the availability of increasingly demanded ESG related information. The enhanced association between the ESG disclosures and firms’ earnings risk during the post-directive period reveals that mandating NFI reporting also increases the quality of ESG disclosures. Originality/value Using the legitimacy and decision-usefulness theories, this study provides novel evidence concerning the impact of the EU directive on the quantity and quality of ESG disclosures.