["Business Strategy and the Environment, EarlyView. ", "\nABSTRACT\nDespite extensive research on the relationship between corporate environmental responsibility (CER) and cost of equity capital (COEC), empirical evidence remains inconsistent. This study addresses these inconsistencies through a comprehensive meta‐analysis of 1139 effect sizes from 75 studies. The analysis establishes a statistically significant but economically weak negative association (r = −0.041, p < 0.001), indicating that enhanced environmental practices reduce financing costs, though the magnitude is practically negligible by conventional standards. This relationship proves robust across multiple tests. The analysis also examines previously under‐explored moderators, finding significant effects of economic conditions (economic development and crises) and regulatory frameworks (disclosure and performance regulations), whereas the sociocultural background shows inconclusive results. Moreover, the analysis detects limited publication bias, which does not, however, alter the main conclusions. These findings provide the first meta‐analytical benchmark estimate of the CER–COEC relationship and highlight the need to shift research focus from establishing the relationship's existence to investigating its economic relevance, offering valuable insights for researchers, managers, policymakers, and investors.\n"]