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📈 '''Natural premium''' is the theoretical cost of providing [[Definition:Insurance | insurance]] coverage for exactly one period — typically one year — based solely on the [[Definition:Insured | insured's]] current age and [[Definition:Mortality risk | mortality]] or [[Definition:Morbidity | morbidity]] risk at that point in time, without any smoothing or leveling across the policy's duration. It is most commonly encountered in [[Definition:Life insurance | life insurance]] and [[Definition:Health insurance | health insurance]], where the underlying risk of death or illness increases with age. Unlike a [[Definition:Level premium | level premium]], which remains constant over the policy term by front-loading charges in earlier years, the natural premium rises each year to reflect the insured's deteriorating risk profile, making it an essential building block in [[Definition:Actuarial science | actuarial]] pricing and [[Definition:Reserve | reserving]] calculations.

🔢 Actuaries compute the natural premium by applying age-specific [[Definition:Mortality table | mortality rates]] (or morbidity rates) to the [[Definition:Sum assured | sum assured]] or benefit amount, then adding a loading for [[Definition:Expense ratio | expenses]] and a margin for adverse deviation. In practice, most long-term insurance products do not charge the natural premium directly, because the steep escalation in later years would render coverage unaffordable precisely when it is needed most. Instead, insurers use [[Definition:Level premium | level premium]] structures that collect more than the natural premium in early policy years and less than it in later years, with the difference accumulating in a [[Definition:Policy reserve | policy reserve]]. Under regulatory and accounting frameworks — whether [[Definition:US GAAP | US GAAP]], [[Definition:IFRS 17 | IFRS 17]], or local statutory standards — the relationship between the natural premium and the charged premium directly determines the timing of [[Definition:Profit recognition | profit recognition]] and the magnitude of reserves on the insurer's balance sheet.

💡 Understanding the natural premium concept is indispensable for anyone involved in product design, [[Definition:Reinsurance | reinsurance]] pricing, or financial reporting for life and health portfolios. It explains why [[Definition:Term life insurance | term life]] products with annual renewable structures become prohibitively expensive at advanced ages, and why [[Definition:Whole life insurance | whole life]] and [[Definition:Endowment policy | endowment]] policies build [[Definition:Cash value | cash values]] — the accumulated excess of level premiums over natural premiums. For [[Definition:Insurtech | insurtechs]] developing dynamic pricing engines or usage-based life products, the natural premium serves as the anchor rate that any commercially viable product must ultimately cover. Regulators, too, scrutinize the adequacy of reserves by comparing accumulated funds against the rising trajectory of natural premiums, ensuring that insurers remain solvent as their portfolios age.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Level premium]]
* [[Definition:Mortality table]]
* [[Definition:Policy reserve]]
* [[Definition:Term life insurance]]
* [[Definition:Actuarial present value]]
* [[Definition:Net premium]]
{{Div col end}}

Definition:Natural premium - Revision history

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