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⚠️ '''Underinsurance''' occurs when a policyholder carries [[Definition:Coverage | coverage]] that is insufficient to fully indemnify a loss. In [[Definition:Property insurance | property insurance]], this typically means the [[Definition:Sum insured | sum insured]] is set below the actual replacement or market value of the asset, leaving the insured to absorb a significant portion of any claim out of pocket. Underinsurance can also manifest in [[Definition:Liability insurance | liability lines]], where policy limits prove inadequate against the true exposure, and in [[Definition:Health insurance | health insurance]], where gaps in coverage leave individuals facing large medical bills despite holding a policy.

🔧 Several mechanisms within insurance contracts address — or are triggered by — underinsurance. The most prominent is the [[Definition:Coinsurance clause | coinsurance clause]] common in commercial property policies, which penalizes policyholders who insure to less than a specified percentage of value (typically 80% or 90%) by reducing the payout proportionally at the time of a claim. [[Definition:Agreed value | Agreed value]] endorsements and [[Definition:Guaranteed replacement cost | guaranteed replacement cost]] provisions offer ways to mitigate underinsurance risk, but they require careful [[Definition:Valuation | valuation]] at policy inception. On the [[Definition:Underwriting | underwriting]] side, carriers rely on [[Definition:Property valuation | property valuation]] tools, replacement-cost estimators, and data analytics to flag policies where declared values appear too low relative to comparable risks, helping agents and [[Definition:Broker | brokers]] counsel their clients before a loss reveals the shortfall.

📉 The consequences of underinsurance ripple well beyond the individual policyholder. When a large segment of a market is underinsured — as often surfaces after catastrophic events like hurricanes or wildfires — the resulting [[Definition:Protection gap | protection gap]] strains public disaster-relief programs and slows economic recovery. For insurers and [[Definition:Reinsurance | reinsurers]], widespread underinsurance complicates [[Definition:Loss modeling | loss modeling]] because actual economic losses far exceed insured losses, distorting demand projections and [[Definition:Catastrophe model | catastrophe model]] outputs. Regulators and industry bodies have increasingly spotlighted underinsurance as a systemic issue, encouraging better consumer education and pushing for technology-driven valuation tools that keep sums insured aligned with rising construction costs, inflation, and evolving risk profiles.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Coinsurance clause]]
* [[Definition:Sum insured]]
* [[Definition:Protection gap]]
* [[Definition:Guaranteed replacement cost]]
* [[Definition:Agreed value]]
* [[Definition:Adequate limits analysis]]
{{Div col end}}

Definition:Underinsurance - Revision history

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