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🏠 '''HO-3 policy''' is the most widely purchased [[Definition:Homeowners insurance | homeowners insurance]] form in the United States, providing broad coverage for the dwelling itself on an [[Definition:Open-peril coverage | open-peril]] (also called "all-risk") basis while covering [[Definition:Personal property | personal property]] on a [[Definition:Named-peril coverage | named-peril]] basis. Developed and standardized by the [[Definition:Insurance Services Office (ISO) | Insurance Services Office (ISO)]], the HO-3 is one of several homeowners policy forms (HO-1 through HO-8) but dominates the market because its open-peril dwelling coverage gives homeowners the broadest standard protection available without moving to the more expensive [[Definition:HO-5 policy | HO-5]] form.

🔧 Under the HO-3's open-peril structure, the [[Definition:Dwelling coverage | dwelling]] and attached structures are covered against all causes of loss unless a specific [[Definition:Exclusion | exclusion]] applies — common exclusions include [[Definition:Flood insurance | flood]], [[Definition:Earthquake insurance | earthquake]], ordinary wear and tear, and intentional acts. Personal property — furniture, electronics, clothing — is covered only for perils explicitly listed in the policy, such as fire, windstorm, theft, and vandalism. The policy also includes [[Definition:Liability coverage | personal liability coverage]] (Coverage E), [[Definition:Medical payments coverage | medical payments to others]] (Coverage F), [[Definition:Additional living expenses (ALE) | additional living expenses]] when the home is uninhabitable, and coverage for detached structures like garages. [[Definition:Deductible | Deductibles]], [[Definition:Sublimit | sublimits]] on high-value items, and optional [[Definition:Endorsement | endorsements]] — such as [[Definition:Scheduled personal property endorsement | scheduled personal property]] or [[Definition:Water backup coverage | water backup]] — allow the policy to be tailored to individual needs.

📊 The HO-3's prevalence makes it a foundational product for [[Definition:Personal lines | personal lines]] insurers, and its standardized ISO form language creates a common baseline for [[Definition:Underwriting | underwriting]], [[Definition:Rating | rating]], and [[Definition:Claims handling | claims handling]] across the industry. Because the form is so ubiquitous, court interpretations of its provisions generate case law that ripples across state lines and shapes coverage expectations for millions of policyholders. For [[Definition:Insurtech | insurtech]] companies entering the homeowners market, understanding the HO-3's structure — its interplay of open-peril and named-peril sections, its standard exclusions, and the endorsement ecosystem built around it — is essential groundwork before attempting to innovate on product design or distribution.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Homeowners insurance]]
* [[Definition:Insurance Services Office (ISO)]]
* [[Definition:Open-peril coverage]]
* [[Definition:Named-peril coverage]]
* [[Definition:HO-5 policy]]
* [[Definition:Endorsement]]
{{Div col end}}

Definition:HO-3 policy - Revision history

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