Covers lost income and extra costs when an insured event — fire, flood, storm — stops you trading, on top of the physical damage itself. Here's how it works, why the indemnity period matters, and what the COVID-19 test case changed.
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Business interruption cover pays out for the financial impact of a disruption to trading — not the repair bill itself, which is what buildings or contents cover addresses.
A landmark Supreme Court judgment reshaped how insurers and policyholders understand non-damage business interruption cover.
In January 2021, the Supreme Court ruled on a group of representative business interruption policy wordings in a case brought by the FCA on behalf of policyholders, following widespread disputes over COVID-19-related claims.
The judgment found that many policies with specific "notifiable disease" or "denial of access" extensions did respond to pandemic-related closures — but only where the policy wording included those specific extensions, not as standard.
Since the ruling, many insurers have redrafted policy wordings to more clearly define or limit pandemic-related cover, often pricing it as a distinct, separately-purchased extension rather than an implicit inclusion.
Outside of specific extensions, most standard business interruption cover still requires physical damage to trigger a claim — a pandemic or non-damage event alone typically won't be covered unless you've specifically bought that extension.
Two decisions do more to determine whether a claim actually protects your business than any other part of the policy.
A common minimum, but often too short for anything beyond straightforward repairs — rebuilding after serious damage frequently takes longer than initial estimates suggest.
A more realistic period for many SMEs, allowing time for planning consent, rebuild, and trading to recover to pre-loss levels — not just for repairs to finish.
Worth considering for larger or more complex premises, or where planning permission and construction lead times are likely to be lengthy.
If your sum insured for business interruption is set too low relative to your actual gross profit, insurers can apply "average" — reducing your claim payout proportionately, even if the loss itself is fully genuine.
A few things worth checking before you buy, whichever UK insurer or broker you compare.
Choose a period long enough to cover full recovery to normal trading — not just the physical repair time — including any planning or procurement delays.
Calculate gross profit carefully and review it annually as the business grows — underinsurance can trigger "average" and proportionately reduce any claim, even a legitimate one.
Check specifically what's covered around denial of access, notifiable disease, and supplier/customer premises damage (contingent BI) — these are typically separate, priced extensions rather than automatic inclusions.
Before buying, confirm any insurer or broker is authorised and regulated by the Financial Conduct Authority — check the register at register.fca.org.uk.
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