How insurance is regulated in the US

Why regulation is state-based

For most of the country's history, insurance was treated as outside federal commerce power. In Paul v. Virginia (1869) the Supreme Court held that issuing an insurance policy was not a transaction of commerce, which left regulation and taxation of insurance to the states. In 1944 the Court reversed course in United States v. South-Eastern Underwriters Association, holding that insurance is interstate commerce that Congress can regulate.

Congress responded in 1945 with the McCarran-Ferguson Act. Its main provisions, as the NAIC summarizes them:

• State primacy. The states continue to regulate and tax the business of insurance.
• Federal laws yield to state insurance laws. A federal law is not to be interpreted to invalidate or interfere with a state insurance law unless Congress clearly says otherwise.
• A limited antitrust exemption. Federal antitrust laws generally do not apply to the business of insurance when states actively regulate it. Where states do not regulate an activity, the Sherman Act, Clayton Act and FTC Act can still apply.

The antitrust provision pushed states to act. Working through the NAIC, regulators developed model rating laws that became the basis of today's state rating laws, including the standard that rates must not be excessive, inadequate or unfairly discriminatory. The exemption is also why advisory organizations can collect pooled loss data and file loss costs for their members within a state-regulated framework. Later federal laws, including the Gramm-Leach-Bliley Act of 1999 and the Dodd-Frank Act of 2010, reaffirmed that states regulate insurance.

What state insurance departments do

A state legislature writes the insurance code and funds the department; the department administers the code through regulations, bulletins, orders and day-to-day supervision. The NAIC describes the work as falling under two objectives, solvency and fair treatment of consumers, and organizes it into these functions:

Insurer licensing

An insurer needs a license, usually called a certificate of authority, before it sells insurance in a state. Every insurer is regulated by its state of domicile and by each other state where it is licensed. The NAIC's Uniform Certificate of Authority Application gives companies one application format for new licenses, but each state decides on its own. Insurers that fail to comply with the law can be fined or have their license suspended or revoked.

Producer licensing

Agents and brokers (producers) must be licensed to sell insurance and must follow each state's rules on their conduct. States administer continuing education requirements and can fine producers or suspend or revoke their licenses.

Product regulation: rates and forms

Departments review policy forms to confirm they comply with state law, are reasonable and fair, and do not contain coverage gaps consumers are likely to misunderstand. For property and casualty insurance they also regulate rates under the state's rating law, which may require approval before use, filing at or after use, or no filing at all, depending on the state, line and type of risk. Prior approval, file-and-use and use-and-file explains those systems, and Rate standards covers the tests rates must meet.

Financial (solvency) regulation

Insurers file quarterly and annual financial statements on uniform NAIC blanks. The domiciliary state, where the insurer is incorporated, takes the lead: its examiners conduct periodic financial examinations, and if an insurer becomes financially impaired the department can take control of it through rehabilitation or liquidation. When an insolvent insurer cannot pay claims, state guaranty associations, funded by assessments on admitted insurers, pay most covered claims up to statutory limits.

Market regulation

Market conduct regulators check how insurers treat policyholders and claimants in practice. Examinations can be routine or triggered by complaints, and they look at sales practices, complaints, claims handling and compliance with filed rating plans, among other things. Regulators also analyze uniform data insurers report through the NAIC's Market Conduct Annual Statement. When violations are found, the department requires corrective action and can impose civil penalties. An insurer charging something other than its filed rates is a market conduct problem as well as a filing problem.

Consumer services

Departments run consumer assistance units that take complaints and inquiries, help resolve disputes with insurers and publish consumer guides. Complaint data also feeds market analysis.

What the NAIC does

The NAIC is a standard-setting and regulatory support organization created and governed by the chief insurance regulators of the 50 states, the District of Columbia and five U.S. territories. It has no authority over insurers on its own; its work takes effect through the states. Its main functions:

• Model laws and regulations. Regulators draft and adopt models through NAIC committees. A model has no force until a state enacts it, and states often adopt models with changes, so "the state adopted the model" is a starting point, not an answer.
• Accreditation. The Financial Regulation Standards and Accreditation Program, adopted in 1989 after a wave of insurer insolvencies, sets baseline standards for solvency regulation. Accredited departments undergo a full review by an independent team every five years, with interim annual reviews. Accreditation lets states rely on the domiciliary state's financial oversight of a multistate insurer.
• Data and systems. The NAIC maintains the national financial database built from insurers' statutory statements and supports producer licensing systems. It also runs SERFF, the System for Electronic Rates & Forms Filing, which regulators developed in the early 1990s and which most states now use to receive rate, rule and form filings.
• Uniformity tools. Uniform transmittal documents, review standards checklists and the Product Coding Matrix give filers a common structure, even though the underlying requirements stay state-specific.

For life, annuity, disability income and long-term care products, many states also participate in the Interstate Insurance Product Regulation Compact, which reviews certain filings once against uniform standards. See The Interstate Compact.

Where federal law reaches in

Federal law touches insurance in specific, limited places. For property and casualty filers, the main ones are:

• Federal Insurance Office (FIO). Created in the Treasury Department by Title V of the Dodd-Frank Act. FIO monitors the insurance sector, represents the United States on prudential aspects of international insurance matters, serves as an advisory member of the Financial Stability Oversight Council and advises the Treasury Secretary. It is not a licensing or rate regulator.
• National Flood Insurance Program (NFIP). Established by the National Flood Insurance Act of 1968 and managed by FEMA. Private Write Your Own insurers sell and service most NFIP policies, but the coverage and its pricing are set under the federal program, not filed with the states as the insurer's own rates.
• Terrorism Risk Insurance Program. Created by the Terrorism Risk Insurance Act of 2002 and administered by the Treasury Secretary with FIO's assistance. The program shares losses from certified acts of terrorism between insurers and the federal government; Treasury's program page lists its reauthorizations and current end date. Commercial forms often carry terrorism endorsements and notices tied to the program, and those forms are still filed with the states.
• Surplus lines. The Nonadmitted and Reinsurance Reform Act, part of Dodd-Frank, assigns regulation and premium tax of surplus lines placements to the insured's home state. See Admitted and non-admitted insurers.

Health insurance has a much larger federal layer, which is outside the scope of this library.

What this means for multistate filers

State-based regulation shapes how filing work is organized:

• One filing per state. A multistate rate or form change is a set of separate filings, each judged under its own state's law, reviewed by its own staff and closed on its own timeline.
• Read the state's law, not the model. Two states that both "adopted" an NAIC model can differ in waiting periods, exemptions, required exhibits and definitions. The statute, regulations and the department's filing instructions control.
• Bulletins carry real requirements. Departments use bulletins and circular letters to announce expectations, interpretations and temporary rules, and these often matter as much as the statute for a given filing. Inside a state insurance department covers how to find and use them.
• The domiciliary state matters beyond filings. Solvency oversight, holding company approvals and financial examinations sit with the home regulator, even for a company that does most of its business elsewhere.
• Federal programs sit alongside, not above. NFIP and terrorism coverage follow federal rules, but the policy forms and rates around them are still state matters.

State filing requirements and checklists covers how to turn each state's sources into a working checklist for a filing.