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📊 '''Statistical plan''' is a regulatory framework that prescribes how [[Definition:Insurance carrier | insurance carriers]] must classify, record, and report their [[Definition:Premium | premium]] and [[Definition:Loss | loss]] data to a designated [[Definition:Statistical agent | statistical agent]] or [[Definition:Advisory organization | advisory organization]]. In the United States, state [[Definition:Insurance regulator | insurance regulators]] require insurers writing certain [[Definition:Line of business | lines of business]] — most notably [[Definition:Workers' compensation insurance | workers' compensation]], [[Definition:Commercial auto insurance | commercial auto]], and [[Definition:General liability insurance | general liability]] — to adhere to uniform statistical plans so that aggregated industry data can be used for [[Definition:Rate making | rate making]], trend analysis, and regulatory oversight. Organizations such as the [[Definition:National Council on Compensation Insurance (NCCI) | NCCI]], [[Definition:Insurance Services Office (ISO) | ISO]], and state-specific bureaus maintain and administer these plans.

⚙️ Under a statistical plan, every [[Definition:Policy | policy]] an insurer writes is coded with standardized identifiers — [[Definition:Class code | class codes]], territory codes, cause-of-loss codes, and coverage indicators — that allow individual transactions to be slotted into a consistent taxonomy across the industry. Insurers transmit this coded data at defined intervals, and the statistical agent compiles it into industry-wide databases. These databases feed the [[Definition:Actuarial analysis | actuarial analyses]] that produce [[Definition:Advisory rate | advisory rates]] or [[Definition:Loss cost | loss costs]], which insurers then use as starting points for their own [[Definition:Rate filing | rate filings]]. Compliance is not optional: regulators audit carriers for adherence, and persistent coding errors or late submissions can result in fines, market conduct scrutiny, or restrictions on the insurer's ability to write business in a given state.

📈 Without statistical plans, the insurance industry would lack the shared data infrastructure that makes credible, experience-based pricing possible — particularly for smaller or mid-sized carriers that do not generate enough volume on their own to develop statistically reliable rates. The uniformity these plans enforce also enables regulators to monitor market-wide trends in claim frequency and severity, detect emerging hazards, and evaluate whether rates are adequate and not unfairly discriminatory. As [[Definition:Insurtech | insurtech]] platforms increasingly automate policy administration and [[Definition:Claims management | claims handling]], the challenge of maintaining accurate statistical plan coding has shifted toward ensuring that modern systems map new data structures back to legacy regulatory taxonomies without losing fidelity.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Rate making]]
* [[Definition:Insurance Services Office (ISO)]]
* [[Definition:National Council on Compensation Insurance (NCCI)]]
* [[Definition:Class code]]
* [[Definition:Loss cost]]
* [[Definition:Advisory organization]]
{{Div col end}}

Definition:Statistical plan - Revision history

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