PurposeThe purpose of this study is to examine the relationship between corporate social responsibility (CSR) and the default risk level of firms operating in the Eurozone and how CSR can provide insurance-like protection during financial/economic downturns.Design/methodology/approachBased on prior empirical studies and by integrating the insights of different theories, this study proposes a framework linking CSR, firm default risk and corporate financial performance to explain firms' social behavior that can trigger default risk determinants (e.g. cost of capital, leverage, sales level) directly or indirectly. The authors use a panel regression approach.FindingsThe results support the mitigating effect of CSR on firm default risk. This effect is higher during a financial crisis, suggesting that CSR could provide insurance-like protection during economic downturns. These results hold even after using an alternative risk measure. Granger causality test results strongly suggest that reverse causality is not a concern. An instrumental variable approach is proposed to deal with potential endogeneity issues.Originality/valueWhile other studies examine the CSR–firm default risk relationship in US samples, this study focuses on the Eurozone. The novelty of this work is based on its sample and how financial crises are addressed within this relationship. Insurance-like protection concerns both negative announcements and periods (e.g. financial crises, recessions). The study's results are useful for investors and risk managers who intend to manage default risk in their portfolios or firms.