Actuarial & Insurance
Basic

Simple Term Insurance Cost

Expected one-year cost of a term policy.

Formula

C=qx×BC = q_x \times B

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Variables

CExpected cost
q_xMortality rate
BBenefit amount

Example

q_x=0.002, B=$200,000: C = $400

How it works

This formula estimates the insurer’s expected payout for one year of coverage by multiplying the chance the insured dies during that year by the benefit paid if death occurs. It works because expected value is probability times payoff: most policyholders do not claim, but the insurer averages that small chance of a large payment across many policies. This gives the pure risk cost before adding expenses, profit, or loading.

When to use it

Use this when pricing a one-year term life insurance benefit at a basic level, especially for rough actuarial calculations or classroom examples. It is also useful whenever you need the expected claim cost for a single policy over a one-year period.

Worked example, step by step

Suppose the one-year mortality rate for a policyholder age x is q_x = 0.0015 and the death benefit is B = $150,000. C = q_x × B C = 0.0015 × 150,000 C = 225 Expected one-year cost = $225

Common mistakes to avoid

  • Using the premium instead of the benefit amount B in the formula
  • Treating q_x as a percentage without converting it to a decimal first
  • Forgetting that this gives expected claim cost only, not the final charged premium

Did You Know?

This is why term life is cheap when young — the yearly probability of a claim is tiny.

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Reviewed & maintained by the FormulaWon editorial teamLast reviewed September 2026