Back to Glossary

Entry · Business

Business Interruption Insurance

Business interruption insurance is a specialized policy that replaces lost income and covers fixed costs when unexpected events, such as a fire or flood, force a company to temporarily halt operations. It essentially bridges the financial gap while your business gets back on its feet.

What it means

Standard property insurance pays to repair your physical building and replace damaged equipment, but it does nothing to help you pay ongoing bills while the doors are closed. This is where business interruption insurance steps in.

It is designed to protect your cash flow during a crisis, ensuring that your business can survive a period of enforced closure without going under. When disaster strikes, this type of insurance typically covers the net profit your business would have generated during that period based on historical records.

It also covers essential ongoing expenses that do not stop just because you are closed. These usually include commercial rent, employee wages, loan interest, and taxes.

Crucially, policies often cover temporary relocation costs if you need to rent a temporary office or storefront to keep serving customers while your primary location is repaired. To calculate your payout, insurers look closely at your past financial performance and future projections.

They want to determine what your revenue and costs would have been had the disruption never happened. It is important to note that these policies almost always require physical damage to insured property as a trigger, meaning standard market downturns or supply chain issues without property damage are generally excluded unless specific endorsements were purchased.

In practice, this coverage acts as a financial safety net for managers and owners. Without it, a few months of zero revenue combined with continuing fixed costs can drain cash reserves completely, leading to permanent closure.

By transferring this specific operational risk to an insurer, businesses can focus their energy on recovery rather than worrying about imminent bankruptcy.

In practice

Real-world examples.

1

Example

A boutique clothing shop suffers a severe water pipe burst, forcing a two-month closure for repairs. The insurance covers their monthly rent of 3,000 pounds and replaces 8,000 pounds in lost monthly profits.

2

Example

An independent accountancy firm experiences a devastating electrical fire. Their policy covers 15,000 pounds a month to lease temporary office space and keep paying their core team of five staff members.

3

Example

A regional manufacturing business has a key assembly machine destroyed by a lightning strike. The policy reimburses 45,000 pounds for delayed customer orders and ongoing fixed payroll during the six-week repair.

Think of it

Think of business interruption insurance as a financial parachute. Standard property insurance fixes the airplane if it is damaged, but the parachute ensures you keep floating safely rather than crashing when your income stream suddenly stops.

Formula

Calculation

Indemnity Payout = (Projected Revenue without disruption - Actual Revenue earned during disruption) + Continuing Fixed Costs - Saved Expenses

Case study

Seen in the real world.

Brighton Bakery, a popular local cafe and bakery, suffered a severe kitchen fire that forced a complete shutdown for three months. Fortunately, the owner, Sarah, had maintained a comprehensive business interruption policy.

Before the fire, Brighton Bakery averaged monthly revenues of 40,000 pounds with operating costs of 30,000 pounds, leaving a net profit of 10,000 pounds per month. During the three months of closure, revenue dropped to zero. However, Sarah still had to pay rent of 5,000 pounds per month and retained her two senior bakers on partial furlough pay costing 4,000 pounds monthly, while saving on raw ingredients costing 11,000 pounds a month.

Upon filing the claim, the insurance assessor calculated the payout based on lost profits plus continuing fixed expenses, minus saved costs. Over the three months, the total indemnity came to 57,000 pounds (representing 30,000 pounds in lost profit and 27,000 pounds in fixed rent and staff costs). This vital injection of funds allowed Brighton Bakery to pay its bills, retain key talent, and reopen successfully without taking on crippling debt.

Watch out

Common mistakes.

  • Assuming standard property insurance automatically covers lost profits and ongoing wages during a closure.
  • Underinsuring the business by failing to update the sum insured as revenue grows year over year.
  • Failing to keep accurate, up-to-date financial records, which makes proving the lost income claim extremely difficult.

Questions

People also ask.

Does this insurance cover a drop in sales if customers simply stop coming?

No. Policies almost always require a direct physical loss or damage, such as a fire or flood, to trigger the coverage.

How is the payout amount decided?

Insurers review your past financial accounts, tax returns, and sales trends to calculate what your profit would have been had the event not occurred.

Are staff wages covered during the shutdown?

Yes, many policies cover ongoing payroll, especially for key employees you need to retain so you can reopen quickly.

From the founder's library

Accounting Fundamentals: A Non-Finance Manager's Guide to Finance and Accounting, by Shihan Sheriff

Take it further with the book.

Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.

US$2.24US$2.99

25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.

View the book and save 25%

Related

Keep reading.

Last updated · September 9, 2026
Browse all terms →

Disclaimer

The information provided in this finance dictionary is for educational and informational purposes only. It should not be construed as financial, investment, legal, or tax advice. Always consult with a qualified professional before making any financial decisions. Money Master HQ makes no representations or warranties about the accuracy, completeness, or suitability of this information. Use of this content is at your own risk.