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⚖️ '''McCarran-Ferguson Act''' is the 1945 federal statute that affirms state governments as the primary regulators of the insurance industry in the United States, exempting the business of insurance from most federal antitrust and commerce laws so long as states actively regulate the activity in question. The law was a direct congressional response to the Supreme Court's 1944 ruling in ''United States v. South-Eastern Underwriters Association'', which held that insurance transactions crossing state lines constituted interstate commerce subject to federal oversight. By passing McCarran-Ferguson, Congress preserved the decentralized regulatory framework that had governed American [[Definition:Insurance regulation | insurance regulation]] for over a century.

🏛️ Under the Act's framework, federal laws apply to the business of insurance only to the extent that no state law addresses the same subject. Each state maintains its own [[Definition:Department of insurance | department of insurance]], which licenses [[Definition:Insurance carrier | carriers]], approves [[Definition:Insurance rate | rates]] and policy forms, monitors [[Definition:Solvency | solvency]], and handles [[Definition:Consumer complaint | consumer complaints]]. This patchwork structure means an insurer operating nationally must comply with up to 56 distinct regulatory regimes (50 states plus territories). Certain federal statutes — notably the Sherman Act, the Clayton Act, and the Federal Trade Commission Act — can still pierce the exemption if a state fails to regulate or if conduct involves boycott, coercion, or intimidation.

🔑 The Act's influence shapes nearly every strategic decision insurers and [[Definition:Insurtech | insurtechs]] make in the U.S. market. Product launches require state-by-state filings and approvals, multi-state [[Definition:Insurance program | programs]] demand careful compliance mapping, and mergers or acquisitions of carriers trigger individual state regulatory reviews. Periodic calls to repeal or reform McCarran-Ferguson surface whenever federal lawmakers seek to impose uniform standards — on [[Definition:Health insurance | health insurance]] regulation, [[Definition:Cybersecurity | cybersecurity]] requirements, or competitive pricing — but the insurance industry and state regulators have consistently defended the existing model. For any company entering the American insurance landscape, understanding McCarran-Ferguson is the essential starting point for navigating the regulatory environment.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Insurance regulation]]
* [[Definition:Department of insurance]]
* [[Definition:State insurance commissioner]]
* [[Definition:National Association of Insurance Commissioners (NAIC)]]
* [[Definition:Solvency regulation]]
* [[Definition:Rate filing]]
{{Div col end}}

Definition:McCarran-Ferguson Act - Revision history

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