["Corporate Social Responsibility and Environmental Management, EarlyView. ", "\nABSTRACT\nAs CSR becomes integral to business strategy, effectively leveraging it for competitive differentiation remains a critical challenge. Despite extensive research, limited attention has been given to how firms jointly deploy CSR communication and implementation to enhance innovation, reputation, and operational outcomes, particularly regarding the roles of engagement and responsiveness in driving innovation and the reputational effects of partner‐ and society‐oriented initiatives. Drawing on stakeholder theory, institutional theory, and the resource‐based view, this study develops and tests a comprehensive model linking CSR communication and implementation to firm performance. Using survey data from 207 Taiwanese firms in the service and electronic technology industries, structural equation modeling (SEM) is employed to validate the proposed relationships. The results indicate that engagement‐ and response‐driven communication strategies significantly enhance CSR innovation, while partner‐ and society‐oriented CSR implementation significantly strengthens CSR reputation. CSR innovation, in turn, positively contributes to both reputation and international market growth, whereas CSR reputation improves operational performance. Overall, the findings empirically confirm that aligning CSR communication and implementation through complementary mechanisms enables firms to achieve both legitimacy and sustained competitive advantage. This study contributes to the literature by integrating CSR communication and implementation into a unified analytical framework, offering a more fine‐grained understanding of CSR value creation beyond traditional aggregate perspectives. It also provides practical implications for managers seeking to enhance innovation capability, reputational capital, and performance outcomes through strategic CSR design.\n"]