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📎 '''Policy extension''' is a provision or modification that broadens the scope of an [[Definition:Insurance policy | insurance policy]] beyond its standard terms — either by expanding the [[Definition:Insurance coverage | coverage]] to include additional perils, parties, territories, or time periods that the base policy would otherwise exclude. The term is used in two distinct but related senses across the industry: it can refer to a coverage extension built into the policy form (such as an automatic extension of coverage for newly acquired property) or to a temporal extension that prolongs the [[Definition:Policy period | policy period]] beyond its original expiration date.

🔧 Coverage extensions are common structural features in both [[Definition:Personal lines insurance | personal]] and [[Definition:Commercial insurance | commercial lines]] policies. A [[Definition:Commercial property insurance | commercial property]] policy, for example, might include extensions for debris removal, expediting expenses, or outdoor property that would not fall within the core insuring agreement. In [[Definition:Liability insurance | liability]] lines, extensions may grant automatic coverage for newly formed subsidiaries or temporary projects for a defined period before formal notification to the [[Definition:Insurance carrier | insurer]] is required. Temporal extensions — sometimes called "hold covered" provisions or extension clauses — allow coverage to continue past the scheduled [[Definition:Expiration date | expiration date]], typically for a short period (often 30 to 90 days) while [[Definition:Policy renewal | renewal]] negotiations are being finalized. The terms governing extensions vary by market and policy form: [[Definition:Lloyd's | Lloyd's]] market wordings, for instance, handle hold-covered clauses under established practices rooted in marine insurance tradition, while standard [[Definition:ISO | ISO]] forms in the U.S. and policy wordings in Continental Europe each have their own conventions.

💡 From a risk management perspective, policy extensions can be both valuable and hazardous. They provide flexibility that keeps policyholders covered during transitional periods and reduce gaps that could leave them exposed, which is why [[Definition:Insurance broker | brokers]] pay close attention to the extension provisions embedded in the forms they place. However, extensions also create [[Definition:Underwriting | underwriting]] exposure that may not be fully priced — particularly temporal extensions that effectively extend the insurer's obligation without a corresponding [[Definition:Insurance premium | premium]] adjustment. Insurers must balance the commercial benefit of accommodating their [[Definition:Policyholder | policyholders']] needs against the actuarial discipline of ensuring that every period and scope of coverage is adequately reflected in their [[Definition:Reserving | reserve]] calculations and [[Definition:Reinsurance | reinsurance]] programs.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Endorsement]]
* [[Definition:Policy period]]
* [[Definition:Coverage grant]]
* [[Definition:Hold covered clause]]
* [[Definition:Policy renewal]]
* [[Definition:Automatic coverage]]
{{Div col end}}

Definition:Policy extension - Revision history

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