Gross profit vs gross revenue: choosing the right business interruption basis

Two phrases, four meanings

The phrase gross profit does a great deal of quiet damage in business interruption insurance, because it has one meaning in a set of accounts and a different one in a policy wording. An accountant’s gross profit is turnover less cost of sales, and cost of sales normally includes direct labour. An insurer’s gross profit is turnover less uninsured working expenses — only those costs listed in the schedule as falling away when trading stops, typically purchases of stock and raw materials, adjusted for stock movements, and sometimes items such as carriage or packing.

Gross revenue — sometimes written as gross income or fees — is simpler: the money paid or payable to the business for goods sold or services rendered, with no deduction for costs at all. Which basis a policy uses, and what the chosen definition actually deducts, decides both the premium and, far more importantly, what the policy pays after a loss.

The accountant-vs-insurer trap

Here is how the trap springs. A business asks its accountant for the gross profit figure and passes it to its insurer as the BI sum insured. The accounting figure has already deducted direct wages. But in a real interruption, wages do not fall away: skilled people are kept on through the closure because the business needs them on reopening day. Those wages are part of the loss the policy is supposed to fund — yet they sit outside the sum insured, because the accounting definition removed them.

The consequence is underinsurance from the first day of cover. BI sections are subject to average: if the sum insured is materially below the correct figure on the policy’s definition, the claim payment is reduced in proportion. A business that thought it was fully covered discovers, mid-recovery, that its claim is being scaled down at exactly the moment cash matters most.

The fix is procedural, not clever: calculate the sum insured on the policy’s definition, starting from turnover and deducting only the costs the schedule lists as uninsured working expenses. If a cost would keep being paid during a shutdown — wages, rent, leases, insurance, most overheads — it stays inside the insured figure.

When gross revenue is the better basis

For businesses with low direct costs, the deduction exercise is barely worth the risk it creates. A consultancy, agency, surgery or other service firm may have almost no costs that genuinely stop when trading stops. Insuring gross revenue — the whole income line — removes the definitional argument: there is nothing to deduct, so there is nothing to get wrong. The premium base is slightly larger, but the claim is cleaner and the underinsurance risk largely disappears.

Manufacturers, wholesalers, retailers and hospitality businesses, by contrast, usually have substantial genuinely variable costs — stock and raw materials chief among them — and gross profit remains the efficient basis, provided the calculation is done properly. The question to ask of every cost line is behavioural, not accounting: would we still be paying this three months into a closure? If yes, insure it.

Project the figure forward, not backward

A second, quieter error is using last year’s figure. The sum insured has to cover the loss across the whole indemnity period, which starts at some unknown future date and runs for 12, 24 or 36 months from there. A growing business insuring last year’s gross profit on a 24-month indemnity period can be underinsured by half or more before any definitional problems arise. The calculation should start from projected turnover across the indemnity period, with headroom for growth.

Declaration-linked cover: the practical safety net

Most UK commercial BI is now written on a declaration-linked basis. Instead of a hard sum insured, the business declares its estimated gross profit for the coming period; the policy provides an automatic uplift margin above the declaration — 133.33 per cent is the market convention — and, crucially, the average clause is disapplied. Declared honestly and updated at renewal, the arrangement converts the underinsurance trap into a manageable annual exercise.

Two caveats keep it honest. First, the declaration must still be calculated on the insurer’s definition — declaration-linked cover fixes the arithmetic of average, not a figure built on the wrong definition. Second, the uplift is a margin for honest error and growth, not a substitute for a serious estimate; a declaration made carelessly invites exactly the dispute the structure exists to avoid.

How Apex approaches the basis question

We start with the shape of the business’s costs, not the renewal schedule. Which costs genuinely stop when trading stops; whether the business is better served by gross profit, gross revenue or an increased-cost-of-working-only structure; what the indemnity period projection does to the figure; and whether declaration-linked terms are available and correctly set up. It is an hour’s structured work a year, and it is the difference between a BI section that performs and one that pays a fraction of a real loss.

Frequently asked questions

Why is the accountant’s gross profit figure wrong for BI insurance?

Because accounting gross profit deducts direct costs including wages, while the policy definition deducts only uninsured working expenses — costs that genuinely stop when trading stops. Wages usually continue through an interruption, so the accounting figure understates the insured loss and creates underinsurance from day one.

Should my business insure gross profit or gross revenue?

Businesses with substantial genuinely variable costs — manufacturers, retailers, hospitality — usually suit gross profit, calculated on the policy definition. Service businesses with low direct costs are often better on gross revenue, which removes the deduction exercise and most of the definitional risk. The deciding question is which of your costs would actually stop during a closure.

What does declaration-linked BI cover change?

You declare an estimated gross profit rather than fixing a sum insured; the policy allows an automatic uplift margin above the declaration and the underinsurance (average) penalty is disapplied, provided the declaration was made honestly and kept up to date. It does not fix a declaration calculated on the wrong definition.

Does the indemnity period affect the gross profit calculation?

Yes. The insured figure must cover projected gross profit across the whole indemnity period, so a 24-month period needs roughly two years of projected gross profit reflected in the figure, with allowance for growth — not last year’s number from the accounts.

Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority (FRN 724952). This page is general information, not advice on a specific policy.