Since the 1979 Islamic Revolution, the Shiʿi theocratic state in Iran has occasionally prioritized state interests over traditional shariʿa rulings. This dynamic is best understood through the lens of the principle of maslahat (variously translated as “public good” or “the interests of the state), which has played a central role in guiding strategic state decisions. By invoking maslahat, the state has justified the modification or suspension of certain shariʿa prescriptions in pursuit of broader political and social objectives. These objectives, primarily safeguarding the Shiʿi theocratic order (hefz-e nezām) and protecting the religion from defamation (vahn-e din), were key tenets articulated by Ayatollah Khomeini and remain foundational to the state's governance. This pragmatic utilization of maslahat has enabled the Shiʿi theocratic state to adapt its legal framework to meet contemporary challenges while ostensibly adhering to shariʿa principles. Notable examples of this adaptability include reforms such as the equalization of blood money for religious minorities and the imposition of moratoriums on stoning executions. However, the inherently subjective nature of maslahat raises concerns about potential arbitrariness and misuse, prompting debates among Shiʿi jurists regarding its legitimacy and scope. This study offers a comprehensive analysis of maslahat within Iran's legal system, exploring its mechanisms, applications, and implications, and highlighting its complex role in both advancing and potentially challenging the principles of Islamic law.