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🗺️ '''Rating territory''' is a defined geographic area — typically a county, ZIP code, or grouping of contiguous regions — that an [[Definition:Insurance carrier | insurer]] uses as a factor within its [[Definition:Rating plan | rating plan]] to reflect the varying levels of [[Definition:Loss experience | loss experience]] associated with different locations. In [[Definition:Auto insurance | auto insurance]], for example, urban territories with dense traffic and higher [[Definition:Theft | theft]] rates carry significantly higher territorial relativities than rural zones, directly influencing the [[Definition:Premium | premium]] a driver pays.

📐 Carriers and [[Definition:Rating organization | rating organizations]] construct territories by analyzing historical [[Definition:Claims data | claims data]] at fine geographic resolution, then grouping areas with statistically similar [[Definition:Loss frequency | frequency]] and [[Definition:Loss severity | severity]] patterns. [[Definition:Actuarial science | Actuarial]] credibility plays a central role: a territory must contain enough [[Definition:Exposure | exposures]] to produce reliable loss estimates, so extremely small zones are often merged with adjacent areas. In [[Definition:Homeowners insurance | homeowners]] and [[Definition:Property insurance | property]] lines, territorial definitions reflect hazards like [[Definition:Wildfire | wildfire]] proximity, [[Definition:Flood zone | flood zone]] designation, [[Definition:Hurricane | hurricane]] exposure, and local [[Definition:Building code | building-code]] enforcement. Changes to territorial boundaries or relativities are typically filed with the [[Definition:State insurance regulator | state regulator]] and may require [[Definition:Prior approval | prior approval]].

🌍 Territory is one of the most powerful — and politically sensitive — rating variables in insurance. Because it correlates with demographics, disputes frequently arise over whether territorial pricing creates disparate impact on protected classes. Several states impose constraints on how much weight territory can carry, and a handful have experimented with alternatives. Nonetheless, geographic risk differentiation remains actuarially essential: ignoring location would subsidize high-risk areas at the expense of low-risk ones, ultimately driving [[Definition:Adverse selection | adverse selection]] that undermines the carrier's [[Definition:Loss ratio (L/R) | loss ratio]] across the board.

'''Related concepts'''
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* [[Definition:Rating plan]]
* [[Definition:Rating tier]]
* [[Definition:Classification code]]
* [[Definition:Catastrophe model]]
* [[Definition:Adverse selection]]
* [[Definition:Ratemaking]]
{{Div col end}}

Definition:Rating territory - Revision history

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