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📜 '''Rating law''' refers to the body of state legislation that governs how [[Definition:Insurance carrier | insurance carriers]] develop, file, and implement the [[Definition:Insurance rate | rates]] they charge policyholders. In the United States, each state maintains its own regulatory framework for rate oversight, ranging from "prior approval" systems—where [[Definition:Rate filing | rate filings]] must be approved by the [[Definition:Insurance commissioner | insurance commissioner]] before use—to "file and use" or "use and file" regimes that allow insurers to deploy rates more quickly. These laws exist to balance the competing goals of keeping [[Definition:Insurance premium | premiums]] affordable for consumers while ensuring that carriers remain financially solvent.

⚙️ The mechanics of rating law hinge on the regulatory classification a state adopts. Under a prior-approval framework, an insurer submits its proposed rates along with [[Definition:Actuarial analysis | actuarial]] justification to the state [[Definition:Department of insurance (DOI) | department of insurance]], which reviews whether the rates are adequate, not excessive, and not unfairly discriminatory. In competitive-rating states, carriers have broader latitude to set prices, with regulators stepping in only if rates appear unreasonable after implementation. Some states apply different standards depending on the [[Definition:Line of business | line of business]]—[[Definition:Personal lines | personal lines]] like auto and homeowners often face stricter scrutiny than [[Definition:Commercial lines | commercial lines]], where sophisticated buyers are assumed to need less regulatory protection.

💡 For insurers and [[Definition:Insurtech | insurtechs]] alike, understanding the patchwork of rating laws across jurisdictions is essential to product strategy and speed to market. A carrier launching a new [[Definition:Insurance product | product]] in a prior-approval state may wait months for regulatory clearance, while the same product could be written almost immediately in a more permissive state. Rating laws also shape how companies adopt [[Definition:Predictive analytics | predictive analytics]] and [[Definition:Artificial intelligence (AI) | artificial intelligence]] in pricing, since regulators increasingly scrutinize whether algorithmic [[Definition:Rating variable | rating variables]] introduce unfair discrimination. As pricing innovation accelerates, the interplay between modern [[Definition:Rating model | rating models]] and decades-old statutory frameworks remains one of the industry's most consequential regulatory tensions.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Rate filing]]
* [[Definition:Prior approval]]
* [[Definition:Insurance rate]]
* [[Definition:Rating methodology]]
* [[Definition:Rating variable]]
* [[Definition:Department of insurance (DOI)]]
{{Div col end}}

Definition:Rating law - Revision history

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