Corporate social responsibility (CSR) plays a growing role in fostering transparency, stakeholder trust, and long-term firm sustainability, particularly in emerging markets. Firms that actively engage in CSR are more likely to disclose credible financial information, which can reduce the incentive to withhold adverse news and thereby limit stock price crash risk (SPCR). This study investigates the impact of CSR on SPCR, while also examining whether this relationship varies across different stages of the firm life cycle (FLC). The analysis is based on an unbalanced panel of listed non-financial firms from the Pakistan Stock Exchange (PSX), covering the period from 2009 to 2023. Financial data were obtained from the State Bank of Pakistan (SBP) and Securities and Exchange Commission of Pakistan (SECP), while market data were collected from the PSX. Employing fixed-effects robust regression models and two crash risk proxies, negative conditional skewness (NCSKEW) and down-to-up volatility (DUVOL), the results reveal a consistent and significant negative association between CSR and SPCR. This suggests that firms with stronger CSR engagement are less prone to extreme negative stock returns. However, the moderating effect of FLC is only evident at the introduction and decline stages, indicating that the effectiveness of CSR in reducing crash risk depends on a firm’s position in its organizational life cycle. These findings contribute to the literature on CSR and financial stability in emerging markets and offer practical implications for investors, managers, and policymakers seeking to promote risk-aware, socially responsible corporate strategies.