How Mortality Risk Is Priced Into A Premium

A life insurance premium looks like a single number, but it is assembled from three separate estimates. Differences between insurers usually come from one of those components rather than from margin.

The three inputs

Pricing begins with an expected mortality rate for the applicant's risk class, drawn from experience tables adjusted for the insurer's own claims history.

Against that sits expected investment earnings on premiums held before claims are paid, which reduces the amount that must be collected up front.

Expenses form the third element: underwriting, distribution, administration and the cost of holding capital against the risk that experience is worse than assumed.

Why risk classes exist

Insurers do not price each applicant individually. They sort applicants into classes and charge the average expected cost of the class plus a margin.

Classes are defined by combinations of health, build, family history and behaviour, with tobacco use typically forming its own division because the mortality difference is large.

The consequence is that an applicant sitting just inside a better class benefits from those slightly worse than them, and someone just outside pays the class above.

Level premiums hide a rising cost

The genuine cost of covering one year of mortality risk rises every year as the insured ages. A level premium spreads that curve into a flat line.

Early premiums therefore exceed the current year's cost, and the surplus accumulates as reserve that funds the later years when the true cost exceeds the payment.

This is why cancelling a level-premium policy partway through discards value, and why a replacement policy issued at an older age starts from a higher curve.

Selection effects and how they fade

Recently underwritten lives experience lower mortality than the general population of the same age, because the unhealthy were declined or rated.

That advantage wears off over time as the group's health disperses, and pricing tables build in the expected pattern of wear-off explicitly.

Insurers also assume some policies will lapse, and lapse assumptions affect pricing significantly, particularly for products where lapsing owners subsidise persistent ones.

Where insurers genuinely differ

Two insurers can quote very different premiums for the same applicant because their class definitions differ, not because one is cheaper overall.

A condition treated as a minor debit by one underwriting manual may push an applicant a full class lower elsewhere, which is why quotes should be compared after underwriting rather than before.

Reserving requirements, permitted rating factors and disclosure obligations vary by jurisdiction and change over time, so local regulation shapes what an insurer may price on.