Life Insurance Calculator
Calculate how much life insurance cover your family needs. Factor in your mortgage, income replacement, children's costs, and existing provision. Compare policy types and plan for inheritance tax.
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How to Use This Calculator
How Much Cover? tab
Enter your outstanding mortgage, annual income, number of years your family would need income support, number of children, and the age of your youngest child. The calculator adds up your total financial obligations — mortgage, income replacement, childcare costs, funeral, and debts — then subtracts any existing life cover and savings to show your recommended cover amount. Expand "More options" to adjust existing cover and savings.
Which Type? tab
Enter your mortgage balance and income replacement need to see which policy type suits each. The calculator compares decreasing term (cheapest, cover reduces like a mortgage), level term (fixed lump sum), and family income benefit (monthly payout). No price quotes — just guidance on which type fits your situation.
IHT Cover tab
Enter your total estate value to estimate your inheritance tax liability and how much whole-of-life cover you may need to offset it. The calculator uses the nil-rate band (£325,000) and residence nil-rate band (£175,000) to estimate IHT. For a detailed calculation, use our Inheritance Tax Calculator.
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The Formula
Life insurance needs are calculated by totalling your financial obligations and subtracting existing provision:
Income Replacement = Annual Income × Years of Support
Children's Costs = £8,000/year × Children × Years to Independence (age 18)
Existing Provision = Current Life Cover + Savings
Recommended Cover = Total Need − Existing Provision
IHT Liability = (Estate Value − Nil-Rate Band − RNRB) × 40%
The biggest single factor is usually the mortgage. Income replacement is the second-largest component — multiply your annual salary by the number of years your family would need support. Children's costs cover childcare and education until they become independent at 18.
Always subtract existing provision: workplace death-in-service benefits (typically 2-4x salary), any current policies, and accessible savings. The result is your insurance gap — the amount of new cover needed.
Example
James & Sarah — Mortgage, Two Children, One Income
James earns £45,000 and is the primary earner. Sarah works part-time. They have a £250,000 mortgage and two children aged 3 and 6. James has a £100,000 death-in-service benefit through work and £20,000 in savings.
How Much Cover? tab
James's adviser recommends splitting this into two policies: a decreasing term policy for the £250,000 mortgage (cheapest option, cover reduces as the mortgage is repaid) and a level term policy for £800,000 to cover income replacement and children's costs.
Which Type? tab
The family income benefit alternative would pay Sarah approximately £4,444 per month until the policy ends — mimicking James's salary and making budgeting easier.