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💲 '''Catastrophe load''' is the portion of an [[Definition:Insurance | insurance]] [[Definition:Premium | premium]] explicitly allocated to cover the expected cost of [[Definition:Catastrophe (CAT) | catastrophic]] [[Definition:Loss | losses]] — those low-frequency, high-severity events like hurricanes, earthquakes, and wildfires that fall outside an insurer's normal attritional loss experience. When an [[Definition:Actuary | actuary]] builds an [[Definition:Indicated rate | indicated rate]] for a [[Definition:Property insurance | property]] line, the catastrophe load stands as a distinct component alongside expected non-catastrophe losses, [[Definition:Loss adjustment expense (LAE) | loss adjustment expenses]], fixed expenses, and [[Definition:Profit load | profit margin]].

📐 Deriving the catastrophe load relies heavily on output from [[Definition:Catastrophe modeling | catastrophe models]], which simulate thousands of potential events to generate an [[Definition:Average annual loss (AAL) | average annual loss]] for a given portfolio or territory. That modeled average annual loss — sometimes adjusted for factors the models may understate, such as [[Definition:Demand surge | demand surge]] or emerging [[Definition:Climate risk | climate trends]] — is then translated into a per-policy or per-unit charge and embedded in the [[Definition:Rating algorithm | rating algorithm]]. [[Definition:Insurance regulator | Regulators]] scrutinize catastrophe loads carefully during [[Definition:Rate filing | rate filings]], as the figure can significantly move overall pricing, particularly in [[Definition:Coastal property insurance | coastal]] and seismically active markets.

📊 An accurately calibrated catastrophe load is essential for maintaining [[Definition:Underwriting profit | underwriting profitability]] over the long run. Set it too low and years of accumulated under-collection will leave an [[Definition:Insurance carrier | insurer]] unable to absorb the inevitable large event without eroding [[Definition:Surplus | surplus]]. Set it too high and the carrier prices itself out of the market, losing volume to competitors willing to accept thinner margins. The challenge is compounded by the non-stationarity of [[Definition:Catastrophe peril | catastrophe perils]] — what historical experience suggests and what forward-looking science projects are increasingly divergent — forcing actuaries and [[Definition:Underwriter | underwriters]] into an ongoing recalibration effort.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Catastrophe modeling]]
* [[Definition:Average annual loss (AAL)]]
* [[Definition:Indicated rate]]
* [[Definition:Rate filing]]
* [[Definition:Profit load]]
* [[Definition:Loss cost]]
{{Div col end}}

Definition:Catastrophe load - Revision history

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