What is business interruption insurance?
Business interruption (BI) insurance covers lost income and continuing costs when a business cannot trade normally. It is usually sold alongside property insurance, and it addresses a gap that catches businesses out badly.
The gap it fills. Property insurance pays to repair or replace damaged premises and stock. It does not pay the wages, rent, loan repayments and overheads that continue while you cannot trade, nor the profit you would have earned. For many businesses that lost income exceeds the physical damage substantially.
What a typical policy covers:
Lost gross profit during the disruption.
Ongoing fixed costs — rent, salaries, utilities, finance.
Increased cost of working — additional expenses to keep trading, such as temporary premises or expedited deliveries.
The critical concepts:
The indemnity period. The maximum period for which the policy pays, chosen when the policy is arranged. Businesses routinely set this too short. Twelve months sounds generous until you consider how long it takes to rebuild premises, replace specialist equipment, obtain planning consent and rebuild a customer base. Insurers and brokers commonly recommend 24 or 36 months.
The trigger. Most BI cover requires physical damage to insured property. This is the point that mattered most in recent years.
Extensions can widen the trigger: denial of access, damage to a supplier's or customer's premises, damage to nearby property preventing access, and utility failure.
What COVID revealed. A very large number of businesses discovered their BI policies did not respond to closure without physical damage. The dispute over whether certain disease and denial of access wordings covered pandemic closures went to the UK Supreme Court in the FCA business interruption test case (2021), which found for policyholders on several wordings.
The consequence: insurers have since tightened wordings, and pandemic and communicable disease exclusions are now near-universal.
Underinsurance is common — sums insured should reflect current turnover, and the average clause applies.