Guides
Documenting a business interruption claim, from day one to final payment
How to prove a business income and extra expense loss under ISO form CP 00 30: the records insurers ask for, how the loss is measured and where claims stall.
A business interruption claim is won or lost on records. The policy pays your actual loss of business income and necessary extra expense while a covered loss keeps you from operating, and the insurer measures that loss against what the business would have earned without the damage. To collect, you have to show that baseline with documents, track every extra cost as it happens, and keep trying to reopen.
This guide follows the ISO Business Income (And Extra Expense) Coverage Form, CP 00 30 10 12, the most common base form. Your policy may use a carrier form or add endorsements that change the details, so read it alongside this guide. For how the coverage works before a loss, see business interruption insurance: how business income coverage works; for choosing limits, see how to calculate a business income limit.
What the standard form pays
Business income is the net income (net profit or loss before income taxes) that would have been earned, plus continuing normal operating expenses incurred, including payroll. For manufacturers, net income includes the net sales value of production. Coverage applies to the actual loss during the "period of restoration," caused by a necessary suspension of operations that results from direct physical loss or damage at the described premises by a covered cause of loss.
Extra expense is the necessary expense you incur during the period of restoration that you would not have incurred without the loss. It includes costs to avoid or minimize the suspension, such as a temporary location or expediting shipments, and repair or replacement costs only to the extent they reduce the income loss that would otherwise be payable. See extra expense coverage explained.
Timing. Under the form's definitions, the period of restoration for business income begins 72 hours after the direct physical loss or damage; for extra expense it begins immediately. It ends on the earlier of the date the property should be repaired, rebuilt or replaced with reasonable speed and similar quality, or the date business resumes at a new permanent location. The Extended Business Income provision then pays the actual income loss for up to 60 consecutive days after operations resume, or until you could reasonably restore income to the level it would have reached, whichever is earlier. A civil authority closure pays after 72 hours for up to four consecutive weeks; see civil authority coverage: when an order closes your doors. Waiting periods, extended periods and other numbers are changed by declarations and endorsements, so check yours.
Your duties that affect the income claim
The loss conditions in CP 00 30 repeat the property duties: prompt notice, protect the property, permit inspection and access to your books and records, send a signed sworn proof of loss within 60 days after the insurer's request, and cooperate. One condition belongs to this form alone: if you intend to continue the business, you must resume all or part of your operations as quickly as possible. The loss determination condition then reduces the business income loss to the extent you can resume operations in whole or in part using damaged or undamaged property, including merchandise or stock, at the premises or elsewhere. If you do not resume as quickly as possible, the insurer pays based on how long resumption would have taken.
In practice that means you should document every effort to reopen: partial opening, temporary space, moving production, shifting orders to a second location. These efforts reduce the loss but they are also evidence that you did what the policy asks. See the sworn proof of loss: what it is, when it's due and how to prepare it for how the sworn statement works.
How the insurer measures the loss
The form says the amount of business income loss is determined from four things:
- The net income of the business before the loss.
- The likely net income if no physical loss had occurred, excluding income from any increase in volume caused by favorable conditions that the covered cause of loss created for customers or other businesses.
- The operating expenses, including payroll, necessary to resume operations with the same quality of service that existed just before the loss.
- Other relevant sources of information, including your financial records and accounting procedures, bills, invoices and other vouchers, and deeds, liens or contracts.
Point 2 is a projection, not a history. That is where claims turn contentious: seasonality, growth trends, new contracts and one-time events all affect what "likely" net income would have been. An accountant who has your books can make a stronger case than an owner's estimate.
The records to assemble
| Category | What to gather |
|---|---|
| Baseline income | Monthly profit and loss statements for the prior 12 to 36 months, tax returns, sales by month, location and product line |
| Forward-looking | Current-year budget or forecast, backlog, signed contracts, reservations, seasonal patterns |
| Continuing expenses | Payroll registers, rent, loan payments, insurance, utilities, subscriptions, licenses |
| Non-continuing expenses | Cost of goods sold, hourly labor you laid off, reduced utilities, anything that stopped with the sales |
| Extra expense | Invoices for temporary space, equipment rental, expediting, overtime, extra advertising to tell customers you are open |
| Mitigation | Notes and communications showing what you did to resume, and what stopped you |
| Post-loss results | Monthly statements during and after the closure, partial sales, customers lost |
Keep a separate account or class code for claim costs so extra expense does not blend into normal spending. Photographs of the closure, notices to customers and emails with vendors support the story.
A hypothetical example
Say a 12-employee neighborhood bakery has a fire in the oven exhaust and the kitchen is unusable for ten weeks. The owner's accountant projects monthly sales of $90,000 from the pre-loss records. The bakery rents a commissary kitchen to keep serving its wholesale customers and makes $11,000 of sales from it in the first month. The accountant also identifies $30,000 of expenses saved because volume fell (ingredients, packaging, hourly wages for laid-off staff, some utilities). All figures are invented for illustration.
| Item (first month of closure) | Amount |
|---|---|
| Projected sales | $90,000 |
| Less actual sales from the commissary | ($11,000) |
| Lost sales | $79,000 |
| Less expenses saved because of the lower volume | ($30,000) |
| Business income loss (lost net income plus continuing expenses) | $49,000 |
| Extra expense: commissary kitchen rent | $6,500 |
| Claim for the month | $55,500 |
The insurer reduces the income loss by what the partial operation earns and pays the commissary rent as extra expense because it reduced the suspension. If the 72-hour waiting period applies, the first three days of income loss are not paid, though extra expense is. The owner submits each month's results and receipts, and the claim is adjusted as they come in. The table shows the mechanism, not what any claim will pay.
Payments and advances
Business income losses cannot be fully known until the closure ends, so many carriers pay advances against the claim as documentation arrives. The standard form pays within 30 days after receipt of the sworn proof of loss when the amount is agreed or an appraisal award has been made. Ask the adjuster about an advance payment schedule early; payroll and debt service do not wait.
Bring a forensic accountant in on larger losses. The base form does not list the cost of preparing the claim as covered, though some carriers add limited claim preparation coverage by endorsement, so ask before you retain one. If the insurer and you disagree on the amount of net income and operating expense or the amount of loss, the form allows either side to demand an appraisal; see the appraisal clause in commercial property disputes.
Where business income claims go wrong
- No physical loss, no coverage. Coverage requires direct physical loss or damage. Closures with no physical damage were the center of the pandemic litigation summarized in What the COVID-19 business interruption lawsuits decided.
- Ignoring the pre-loss trend. A growing business that uses flat historical sales leaves money out; a declining one is expected to show it.
- Not resuming. Waiting for a perfect reopening date while a partial operation was possible reduces the claim under the resumption condition.
- Mixing costs. Betterment, upgrades beyond like kind and quality, and ordinary expenses do not belong in extra expense.
- Suppliers and customers. Loss caused by damage at someone else's premises needs contingent coverage; see contingent business interruption insurance and supply chain risk.
- Missing deadlines. The proof of loss clock, the coinsurance percentage shown in the declarations, and the extended period are all dated; calendar them.
If the claim is large or contested, a public adjuster or coverage attorney may help; see public adjusters: when to hire one for a business property claim for what they charge and where they add value.
Key takeaways
- The policy measures actual loss against likely net income without the damage, so your pre-loss financials and forward-looking records carry the claim.
- In CP 00 30 10 12 the income waiting period is 72 hours, extra expense begins immediately, and extended business income runs up to 60 days after operations resume; endorsements and declarations may change these.
- You must resume operations as quickly as possible, and your mitigation efforts reduce the loss while proving you complied.
- Track extra expense separately and keep receipts; it is paid only when necessary and tied to the covered loss.
- Ask for advance payments, consider a forensic accountant, and know that disputes over the amount can go to appraisal.