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🌐 '''Open peril coverage''' — also referred to as "all-risk" or "all-perils" coverage — is a form of [[Definition:Property insurance | property insurance]] that covers [[Definition:Loss | loss]] or damage from any cause unless that cause is specifically excluded in the [[Definition:Insurance policy | policy]]. This stands in contrast to [[Definition:Named peril coverage | named peril coverage]], where the policy lists only specific perils (such as fire, windstorm, or theft) and provides no protection against events not on that list. Open peril policies are standard in commercial property programs and are widely used in homeowners insurance across many markets, offering the broadest available scope of protection subject to the exclusions and conditions stated in the wording.

⚙️ Under an open peril form, the [[Definition:Burden of proof | burden of proof]] shifts in a way that favors the [[Definition:Policyholder | policyholder]]: the insured need only demonstrate that a covered loss occurred, while the [[Definition:Insurance carrier | insurer]] bears the burden of proving that an exclusion applies if it wishes to deny the claim. This is the reverse of a named peril policy, where the policyholder must show the loss was caused by one of the listed perils. Common exclusions in open peril wordings include wear and tear, gradual deterioration, inherent vice, [[Definition:War risk | war]], nuclear hazard, and — increasingly — [[Definition:Cyber risk | cyber-related]] damage. [[Definition:Flood insurance | Flood]] and [[Definition:Earthquake insurance | earthquake]] may also be excluded in certain markets and available only through separate policies or endorsements. The precise list of exclusions varies by insurer, market, and product line; [[Definition:Underwriter | underwriters]] carefully calibrate exclusions to manage accumulation risk and ensure that the policy does not inadvertently provide coverage for perils that are uninsurable or require specialized pricing. In the [[Definition:Lloyd's of London | Lloyd's]] market and among large commercial insurers globally, open peril wordings are the norm for major commercial property placements, often negotiated extensively between [[Definition:Broker | brokers]] and underwriters.

💡 Open peril coverage offers policyholders a critical advantage: protection against unforeseen or unusual events that might never appear on a named peril list. A manufacturing facility damaged by an unexpected chemical reaction, or a warehouse affected by a sinkhole, would likely find coverage under an open peril form but might fall through the gaps of a named peril policy. This breadth comes at a higher [[Definition:Premium | premium]], reflecting the wider range of exposures the insurer assumes. For risk managers, the key discipline when purchasing open peril coverage is a thorough review of the exclusions — because everything hinges on what is carved out, not what is listed in. For insurers, open peril policies require robust [[Definition:Loss reserves | reserving]] practices and sophisticated [[Definition:Catastrophe modeling | catastrophe modeling]], as the universe of potential claims is inherently less predictable than under a named peril approach. The ongoing evolution of emerging risks — from [[Definition:Climate risk | climate change]] to technology-driven perils — continually tests the adequacy of standard open peril exclusions and drives regular updates to policy language across the global market.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Named peril coverage]]
* [[Definition:Property insurance]]
* [[Definition:Policy exclusion]]
* [[Definition:All-risk insurance]]
* [[Definition:Burden of proof]]
* [[Definition:Catastrophe modeling]]
{{Div col end}}

Definition:Open peril coverage - Revision history

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