Business interruption insurance pays your fixed costs while the business cannot trade. Not the repairs, not the stock, the income you would have earned. If a fire closes your shop for six weeks, the ordinary policy replaces the fittings and the stock. Business interruption cover is what pays rent, salaries and the loan instalment during those six weeks.
That distinction is where businesses get hurt. Rebuilding is survivable. Six weeks of fixed costs with no revenue is what closes the doors, and it is the part most owners have not insured properly.
How it works, and why it cannot stand alone
Business interruption cover is an extension, not a standalone policy. It attaches to an underlying policy, usually the fire or material damage section, and in most wordings it only responds when that underlying policy responds. Damage from an insured peril interrupts trading, and the extension covers the resulting loss of income.
That structure has a consequence worth understanding before you need it: if the underlying claim is declined, the interruption claim usually falls away with it. The two are linked by design.
Cover normally includes gross profit or turnover lost during the interruption, ongoing fixed costs such as rent, salaries and finance repayments, and increased cost of working, which is money spent to keep trading, like renting temporary premises or paying for overtime to catch up.
The indemnity period is the number that matters
This is the single most important figure on the schedule and the one most often left at whatever the broker’s default was.
The indemnity period is how long the policy will keep paying after the event. If it is set at three months and it takes you nine months to reopen, the last six months are yours.
Be realistic about what recovery involves. Not just repairs, but insurance assessment, municipal approvals, lead times on specialised equipment, re-hiring staff who found other work, and rebuilding the customer base that went elsewhere while you were closed. A manufacturer waiting on imported machinery is not back in three months. Twelve to twenty-four months is common for anything with a physical dependency.
Check two things on your schedule today: the indemnity period, and whether the sum insured reflects current turnover rather than what you were doing when the policy was written. Underinsurance triggers average, meaning the insurer pays proportionally less on every claim.
What is usually excluded, and the one exclusion that surprises people
Ordinary policies do not cover interruption caused by riot, strike or civil unrest. That is Sasria cover, from the state-owned special risks insurer, added through your own insurer or broker, and it requires an underlying policy in force at the time of the event. Businesses that discovered this gap after the July 2021 unrest found out at the worst possible time.
Other common exclusions include wear and tear, gradual deterioration, and losses arising from a supplier’s failure unless you have specifically bought contingent business interruption cover for that supplier.
What the Covid litigation actually settled
This is worth understanding because it is widely misremembered.
When trading stopped in 2020, many insurers declined business interruption claims on the basis that there had been no physical damage. Two cases went the other way. In Café Chameleon v Guardrisk, the Supreme Court of Appeal dismissed the insurer’s appeal and ordered the claim settled in full. In Ma-Afrika Hotels v Santam, the Western Cape High Court ordered payment across the full eighteen-month policy period rather than a shortened one.
The reasoning matters more than the outcome. Those policies contained an infectious or notifiable disease extension, and the court held that the trigger was the declaration of a notifiable disease, including harm attributable to the government’s response to it. The businesses won because of specific wording in their policies, not because business interruption cover generally responds to a pandemic.
The lesson for any owner is that these claims turn on the exact extension wording. Ask your broker in writing which extensions are on your policy and what triggers each one. A verbal assurance that you are “fully covered” is not an answer.
Do you need it?
Ask one question: if you could not trade for three months, could the business pay its fixed costs from reserves?
If yes, you may be able to carry the risk yourself. If no, and for most small businesses the answer is no, then the cover is doing a job that nothing else in the business can do. Our guide to cash flow solutions covers the alternatives, and none of them arrive fast enough after a fire.
It matters most where a business depends on a physical location or specific equipment: restaurants, retail, manufacturing, workshops, anything where the premises are the business. It matters least for a business that can operate from anywhere with a laptop, though even there a stock loss or an equipment failure can stop trading.
Before you buy or renew
Work out your monthly fixed costs and your gross profit, since those are what the sum insured should be based on. Set an indemnity period against a realistic recovery timeline rather than an optimistic one. Confirm Sasria is on the policy. Ask which extensions apply and what triggers them, in writing. Then review the figures annually, because a policy sized to a business you have outgrown will underpay exactly when it matters.
Where to buy it is covered in our guide on where to get business interruption insurance, and how this fits a wider plan in our guide on how to avert a business crisis.
Frequently asked questions
What does business interruption insurance actually pay for?
Lost gross profit or turnover during the interruption, ongoing fixed costs such as rent, salaries and finance repayments, and the increased cost of working needed to keep trading. Not the repairs themselves, which the underlying policy covers.
Can I buy it on its own?
Generally no. It is an extension to an underlying policy, usually fire or material damage, and in most wordings it responds only when that policy responds.
How long should the indemnity period be?
As long as a realistic recovery would take, including assessment, approvals, equipment lead times and rebuilding your customer base. Twelve to twenty-four months is common where premises or specialised equipment are involved.
Does it cover riots or civil unrest?
Not under an ordinary policy. That requires Sasria cover, added through your insurer or broker, with an underlying policy in force at the time of the event.
Does it cover a pandemic?
Only if the policy carries an infectious or notifiable disease extension, and then it depends on that wording. The Café Chameleon and Ma-Afrika judgments turned on such extensions. Ask your broker in writing which extensions you have.
The one thing to do today
Take out your policy schedule and find the indemnity period. If it says three or six months, work out honestly whether you could reopen and rebuild your income in that time. For most businesses the honest answer is no, and correcting it costs a phone call and a small premium increase rather than the business. Wider protection is covered in our piece on business assurance.
This article was updated in September 2026.
