By analysing 796 companies' data from 21 European countries, this research uncovered the nexus between institutional quality (IQ) and corporate sustainable performance (CSP). The relationship was theoretically examined with the lens of institutional theory and then empirically tested. The findings show that IQ has a positive and significant impact in safeguarding CSP, and firms’ characteristics play an essential preamble in this regard. We additionally found the heterogeneous impact of IQ on CSP. To come to a conclusion, we have applied random effect, two-step system GMM and quantile regression models. Our findings are consistent and empirically robust; therefore, the study disseminates key messages to policymakers and practitioners about the role of IQ in safeguarding CSP.