How to Document Business Interruption Losses for an Insurance Claim

Many commercial property policies require direct physical loss or damage caused by a covered peril before business income coverage applies.

In Consolidated Restaurant Operations, Inc. .. Westport Insurance Corp. (2024), the New York Court of Appeals held that the policy's physical-loss language required material alteration or complete and persistent dispossession of insured property. Temporary loss of use alone did not satisfy that standard.

The ruling does not replace the need to examine the particular policy. Separate endorsements, including civil authority or contingent business interruption coverage, may establish different conditions.

To document the underlying event, businesses should preserve photographs, inspection reports, repair estimates, and dated incident records. These materials may establish the cause and extent of covered fire damage or other qualifying property damage.

An insurer may argue that declining revenue reflects market conditions rather than the insured event.

Cancelled orders, customer correspondence, production logs, and delivery records can show which transactions the interruption affected. Sales trends before the incident help establish whether revenue was already declining.

For companies operating multiple locations, results from unaffected branches may provide a useful comparison. Such records can also reveal losses caused by company-wide conditions unrelated to the insured event.

The appropriate comparison period depends on the company's operating history, seasonal demand, and available records.

Financial statements should reconcile with the transactions supporting the claim. If figures differ because of accounting adjustments or unusual expenses, owners should document the explanation.

Accounting software, point-of-sale systems, and ordering platforms often contain transaction-level information that monthly summaries cannot show.

Preserve original exports, dated sales reports, and relevant system records. Pre-incident records are especially useful because they establish business performance before the company had a financial interest in documenting the claim.

A business that closes temporarily may lose sales while avoiding certain operating costs, including inventory purchases or variable production expenses.

A supportable claim calculation should:

• Estimate revenue that would have been earned without the interruption.
• Account for actual revenue during the affected period.
• Identify expenses avoided because operations stopped.
• Include qualifying continuing expenses.
• Calculate covered extra expenses separately.

Businesses should reconcile these figures with their accounting records and policy provisions.

For instance, inventory costs that were never incurred generally cannot be treated as continuing expenses merely because the business lost the associated sales.

Historical sales averages may not reflect a company's expected performance when demand fluctuates seasonally or the business has recently expanded.

Signed customer contracts, confirmed orders, booking histories, and established growth trends can support projections. A newer business may have fewer historical statements but stronger evidence of future transactions.

When insurers challenge these assumptions, the dispute often concerns the reliability of the projected earnings rather than the existence of the interruption itself.

An organized financial model allows the parties to identify which assumptions require further evidence during insurance claims adjustment.

The period of restoration generally covers the time reasonably necessary to repair, rebuild, or replace damaged property, subject to the policy's terms.

It does not necessarily extend until sales return to their previous level.

Contractor schedules, permit applications, equipment delivery records, and repair invoices can explain delays and establish when operations reasonably could have resumed.

Some policies provide extended business income coverage after reopening. Businesses claiming these losses should maintain separate post-reopening revenue records and confirm the applicable coverage period.

Extra expense coverage may apply to temporary relocation, equipment rental, expedited shipping, or other qualifying costs incurred because of the covered interruption.

Invoices should identify the expense, payment date, and operational purpose. Costs incurred to continue or restore operations must be distinguished from expenses the company would have incurred regardless of the loss.

The policy may also address whether particular expenditures reduce otherwise covered business income losses. Owners should document the relationship between these amounts to avoid unsupported or duplicate recovery requests.

Commercial property policies may require prompt notice, cooperation with the insurer, supporting records, and a sworn proof of loss.

New York Insurance Law § 3407(a) addresses the consequences of failing to furnish proof of loss under qualifying property insurance contracts issued or delivered in the state or covering property located there.

Under that provision, failure to submit contractual proof of loss does not invalidate or diminish a claim unless the insurer provides a written demand accompanied by suitable forms. Submission within 60 days after receiving the demand and forms, or a longer period stated in the notice, satisfies the contractual timing requirement addressed by the statute.

This rule does not eliminate other policy conditions or deadlines. Businesses should review notice requirements, document requests, and any applicable contractual time limit for filing suit separately.