Glossary

Underwriting

How an insurer evaluates a home and its owner, decides whether to offer coverage and on what terms, and sets the price.

Also called: insurance underwriting, residential underwriting, risk selection

Underwriting is the insurer's decision about whether to take your risk and at what price. For a homeowners policy it happens when you apply and again at renewal. An underwriter, or increasingly an automated system, looks at the house and the applicant: roof age and type, construction, distance to the coast or wildfire exposure, fire protection, wiring and plumbing, claims history from a CLUE report, and in most states an insurance score.

The outcome is one of three. The insurer accepts the home at its standard terms, accepts it with conditions such as a higher wind deductible, an actual cash value roof schedule or an exclusion, or declines it. Price follows from the insurer's filed rates, adjusted for the risk factors it finds. The rules the underwriter applies are the company's underwriting guidelines.

Underwriting does not stop at the sale. Many insurers inspect or review aerial photos within weeks after a policy starts, and a poor finding can bring a request for repairs or a nonrenewal.

What helps you: answer application questions accurately, since a material misstatement can give the insurer grounds to rescind or deny a claim; fix visible roof, wiring or plumbing problems before you shop; and document upgrades. The guide to how insurers decide walks through the factors.

Last reviewed October 10, 2026

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Related terms

Underwriting guidelines An insurer's internal rules for which homes it will write, which it will decline, and what conditions, limits or surcharges apply to the ones it accepts. CLUE report A LexisNexis report of the auto and property claims tied to a person and an address over roughly seven years, which insurers pull when underwriting. Insurance score A number built from your credit report data that insurers use to predict how likely you are to file claims, and therefore how to price your policy. Rating territory A geographic area, often a ZIP code or county, that an insurer prices as a unit because losses from weather, fire and theft differ from place to place. Moral hazard The risk that holding insurance leads someone to cause or inflate a loss, or to take less care, because the insurer rather than the owner bears the cost. Underwriting profit What an insurer keeps from premiums after paying claims, claim-handling costs and operating expenses, before any investment income is counted.

Related guides

Aerial imagery: how insurers inspect roofs from the sky How insurers use aircraft, satellite and drone images to judge roofs, where they mislead, what states have ruled, and how to contest a nonrenewal based on one. AI in home insurance: the rules on underwriting and claims What rules apply when home insurers use AI and algorithms to underwrite policies and handle claims, including the NAIC model bulletin, and what you can ask. Check insurability before you buy a house Get address-specific quotes and an eligibility answer during your inspection period, before you are committed. What to check and what to do if insurers say no. CLUE reports: how claims history follows you and your house A CLUE report holds up to seven years of claims tied to you and your address. What it shows, how insurers use it, how to get your free copy and dispute errors. Defensible space and wildfire insurance What defensible space and California's new Zone 0 rules require, how insurers inspect and score your vegetation, and what to do if renewal depends on clearing. Fire protection class (ISO PPC) and your rate Your fire protection class grades local fire service from 1 to 10. How split classes work, why a hydrant 1,000 feet away matters, and how to find your class.