Business interruption insurance

Business interruption insurance is the class of commercial insurance that indemnifies a business for the loss of gross profit, revenue or earnings, and the increased cost of working, that it suffers as a consequence of an interruption to its trading following an insured event - traditionally physical damage to property used in the business.

Definition §

Business interruption (BI) insurance is sometimes called "consequential loss" or "loss of profits" cover. It is typically purchased as a section of a property or combined commercial policy, with the property damage section ("material damage") providing cover for the physical loss and the BI section providing cover for the financial consequences of the interruption to trading caused by that physical loss ^[2][3].

Standard BI cover is usually expressed in terms of "gross profit" - broadly, turnover less specified uninsured working expenses (such as variable purchases) - measured over an "indemnity period" running from the date of damage until the business returns, or could reasonably return, to its pre-loss trading position. The indemnity period is fixed in the policy schedule and commonly set at 12, 18, 24 or 36 months ^[2][4].

Two principal types of cover overlap. First, traditional "material damage warranty" BI requires physical damage to insured property at the insured premises as a precondition to cover. Second, "non-damage extensions" provide cover for specified circumstances that do not involve damage at the insured's own premises, such as denial of access by a public authority, damage at suppliers' or customers' premises, or notifiable disease at or near the premises. The scope and trigger of non-damage extensions was the central issue in the FCA Test Case arising from COVID-19 ^[5].

Legal / Regulatory basis §

The BI contract is governed by the general law of insurance contracts and, in particular, by the Insurance Act 2015, which sets out the insured's duty of fair presentation and modifies the remedies for breach of warranty. Section 13A imposes an implied term that the insurer must pay sums due within a reasonable time, with damages available for breach ^[1].

The principal modern case shaping the interpretation of BI cover in the UK is the FCA Business Interruption Test Case, ultimately decided by the Supreme Court as Financial Conduct Authority v Arch Insurance (UK) Ltd [2021] UKSC 1, [2021] AC 649 ^[6]. The Supreme Court delivered its judgment on 15 January 2021, largely upholding the FCA's interpretation favourable to policyholders on disease and prevention-of-access wordings, and addressing the proper approach to causation and counterfactuals in BI claims arising from the COVID-19 pandemic. The Court substantially departed from the reasoning in Orient-Express Hotels Ltd v Assicurazioni Generali SpA [2010] EWHC 1186 (Comm) on the appropriate counterfactual for proximate cause ^[6][7].

The FCA brought the test case under section 165 of the Financial Services Markets Act 2000 to provide rapid clarity on whether certain non-damage BI wordings responded to the COVID-19 pandemic and the related government measures. The judgment had significant consequences for the way "disease" wordings, "prevention of access" wordings and "hybrid" wordings are interpreted and the way associated trends clauses operate ^[6].

The FCA conduct rules (ICOBS) regulate the sale of BI insurance to commercial customers and the way insurers handle claims ^[8].

How it works in practice §

When an insured event occurs - for example, a fire that damages the insured's factory - the material damage section pays for reinstatement of the property. The BI section then responds to the loss of gross profit the business suffers during the period of disruption, alongside the additional expenses (increased cost of working) reasonably incurred to mitigate that loss ^[2][3].

The claim is assembled with the help of a loss adjuster and, typically, forensic accountants instructed by the insurer. The insured business's pre-loss trading record is used to project what the business would have earned during the indemnity period had the insured event not occurred, against which actual earnings during the indemnity period are compared. Standard "trends clauses" allow adjustments for trends in the business and circumstances affecting it that would have applied irrespective of the damage ^[4][6].

Several practical features shape claims. The indemnity period must be long enough to allow not only physical reinstatement but the recovery of customer relationships and market position. Underestimating the indemnity period or the gross profit sum insured leads to underinsurance and pro-rata reductions of claims. Many policies provide a "declaration linked" basis, removing average for gross profit cover provided certain declarations are filed on time ^[3][4].

Mitigation is central. The insured is expected to take reasonable steps to mitigate loss, and increased cost of working is normally only payable to the extent it has reduced what would otherwise have been a larger gross-profit shortfall. Some wordings include an "additional increased cost of working" extension that relaxes this economic limit, subject to its own limit ^[2][3].

Common variations §

Cover triggers vary widely. Basic material-damage-warranty BI requires damage at the insured premises by an insured peril (fire, lightning, explosion, escape of water, etc). Common extensions include: damage at suppliers' or customers' premises ("contingent business interruption"); damage at named or unspecified utilities; denial of access (sometimes triggered only by damage in the vicinity, sometimes by the act of a public authority); notifiable disease at or within a specified radius of the premises; and infectious disease, vermin or pests on the premises ^[2][5].

Following the FCA Test Case, market wordings have been revised to clarify the boundary between covered and uncovered disease scenarios, and many insurers have introduced explicit pandemic exclusions ^[6]. Specialist standalone non-damage BI products remain available for certain sectors but at materially higher premiums and with strict sub-limits.

Indemnity periods range from 12 months for small businesses to 36 or 48 months for large or complex operations where a major loss could take years to recover. Manufacturers, hotels, food production sites and businesses dependent on bespoke machinery or specialist labour usually require longer indemnity periods than retail or office operations.

Alternatives and complements include: business interruption following machinery breakdown (engineering BI); marine business interruption; and parametric covers that pay a fixed sum on the occurrence of a defined trigger, sidestepping the lengthy adjustment process. Cyber business interruption, covering loss of revenue following a network outage or ransomware event, is a fast-growing specialist line typically purchased as part of a cyber policy.

Example §

A boutique hotel in the South West suffers a serious fire that closes the property for six months. The material damage section of the combined commercial policy funds reinstatement of the building, fixtures and contents. The BI section, with a £1.5m gross-profit sum insured on a 24-month indemnity period, indemnifies the lost gross profit measured from the date of the fire until trading recovers to the pre-loss trend. Forensic accountants compare projected trading (using a multi-year history adjusted for known trends) with actual trading. The hotel's additional spend on a temporary marketing campaign and on retaining key staff during the closure is paid as increased cost of working, having reduced the gross-profit shortfall. The claim settles within the indemnity period at approximately £900,000 for gross profit and £80,000 for increased cost of working.

See also §

• /wiki/commercial-insurance/ — broader family of business covers
• /wiki/combined-commercial-policy/ — packaged products that include BI
• /wiki/insurance-act-2015/ — governing contract statute
• /wiki/section-13a-claims-handling-duty/ — insurers' duty to pay within a reasonable time
• /wiki/public-liability-insurance/ — distinct third-party cover
• /wiki/cargo-insurance/ — for goods in transit losses

References §

1. ↑ Insurance Act 2015 — https://www.legislation.gov.uk/ukpga/2015/4
2. ↑ Association of British Insurers — https://www.abi.org.uk/
3. ↑ Lloyd's Market Association — https://www.lmalloyds.com/
4. ↑ British Insurance Brokers' Association — https://www.biba.org.uk/
5. ↑ FCA Business Interruption Insurance test case materials — https://www.fca.org.uk/firms/business-interruption-insurance
6. ↑ *Financial Conduct Authority v Arch Insurance (UK) Ltd* [2021] UKSC 1, [2021] AC 649
7. ↑ *Orient-Express Hotels Ltd v Assicurazioni Generali SpA* [2010] EWHC 1186 (Comm)
8. ↑ FCA Handbook (ICOBS) — https://www.handbook.fca.org.uk/handbook/ICOBS/