Comparison · Insurance · 2026
Business Interruption Insurance vs Key Person Insurance UK 2026: Which Protects Your Business?
Business interruption insurance and key person insurance both aim to keep a business financially stable through a serious disruption, but they respond to completely different events. Business interruption replaces lost profit after physical damage stops normal trading; key person insurance pays out if a critical individual dies or becomes seriously ill. Here is the full 2026 comparison for UK small and medium businesses.
TL;DR - 30-Second Summary
- - Business interruption: replaces lost profit and fixed costs after fire, flood or other insured property damage stops trading
- - Key person insurance: pays a lump sum to the business if a critical individual dies or is diagnosed with a serious illness
- - Different triggers: one is property-event driven, the other is person-event driven — many businesses need both
Side by Side: Business Interruption vs Key Person
| Feature | Business Interruption | Key Person Insurance |
|---|---|---|
| What triggers a claim | Fire, flood, storm or other insured property damage | Death or serious illness of a named individual |
| Payout basis | Lost gross profit + fixed costs over indemnity period | Pre-agreed lump sum |
| Linked policy | Usually attached to buildings/contents insurance | Standalone life/critical illness-based policy |
| Underinsurance risk | High — average clause can cut payout | Set at outset; less prone to average clauses |
| Tax treatment | Premiums generally deductible; payout often taxable as trading receipt | Deductibility depends on Anderson rules test |
What Is Business Interruption Insurance?
Business interruption insurance replaces lost gross profit and continues covering fixed costs (rent, salaries, loan repayments) when a business cannot trade normally after an insured event, typically fire, flood, storm or theft-related damage. It is usually attached to a buildings or contents policy rather than sold standalone, and the sum insured is based on projected gross profit over a chosen indemnity period, commonly 12 to 36 months.
Underinsurance is a significant risk: if the declared gross profit figure is too low relative to actual figures, insurers can apply "average" and reduce any claim proportionally, even for a legitimate loss.
What Is Key Person Insurance?
Key person insurance (sometimes called keyman insurance) pays a lump sum directly to the business if a named individual critical to its success dies or is diagnosed with a specified serious illness. The business is both the policy owner and the beneficiary, and uses the payout to cover recruitment costs, lost revenue during the transition, or repaying business debts that relied on that person's guarantee or expertise.
The sum insured is typically calculated as a multiple of the key person's salary or a share of the profit attributable to them, agreed at the outset of the policy with input from an accountant or insurance broker.
Why Both Matter for Business Continuity Planning
A small manufacturing business could lose its factory to a fire (a business interruption event) in one year, and separately lose its founding technical director to sudden illness (a key person event) in another. The two risks are unrelated but both threaten the business's survival. Comprehensive continuity planning for small and medium businesses typically considers both physical asset risk and key individual risk side by side.
Who Should Choose What?
- - You rely on physical premises, stock or equipment to trade
- - A fire or flood would stop revenue for weeks or months
- - You already hold buildings or contents insurance
- - Revenue or delivery depends heavily on one or two individuals
- - Losing that person would materially damage the business financially
- - Lenders or investors require it as a condition of finance
Most established small businesses with premises and a small leadership team benefit from carrying both covers as complementary elements of a wider continuity plan.