By Mahendra Bhansali, CA · September 2026 · 6 min read
Ask a business owner if they have fire insurance and most say yes. Ask if they have business interruption cover and you'll usually get a pause, followed by "isn't that the same thing?" It isn't — and the gap between the two is where a lot of businesses actually get hurt financially after a serious incident.
Fire insurance pays to repair or replace your building, machinery, and stock. Business interruption (BI) insurance — sometimes called loss of profit cover — pays for the income you lose while that repair is happening. If a fire shuts your factory for two months, fire insurance rebuilds the factory. BI insurance replaces the profit you would have earned during those two months. Without it, the business absorbs that loss entirely on its own, even though the property damage itself was fully insured.
BI cover isn't automatically included in a standard fire policy — it's typically a separate add-on or a distinct policy entirely, calculated based on your business's actual gross profit, not just asset values. Because it requires a slightly more involved conversation about your financials, it's often the first thing left out when a business owner is comparing quotes primarily on premium.
BI sum insured is typically based on your annual gross profit (not revenue, and not physical assets), projected forward, plus standing charges that continue even while the business isn't operating — rent, salaries, loan repayments. Getting this calculation right matters: understate it, and a genuine interruption claim gets proportionately reduced; overstate it, and you're paying unnecessary premium.
BI policies specify a maximum "indemnity period" — how long the cover pays out for, following an insured event. If your business could realistically take a year to fully recover from a major fire (rebuilding, re-equipping, rebuilding customer relationships), but your policy's indemnity period is only 6 months, you're exposed for the difference. This is worth thinking through honestly rather than defaulting to whatever period the quote assumes.
A mid-sized manufacturer we worked with had comprehensive fire cover on their building and machinery, but no BI cover. A machinery fire took the production line offline for 10 weeks. The physical damage claim was settled reasonably smoothly. But the 10 weeks of lost production, lost orders to competitors, and continued fixed costs — salaries, rent, loan payments — came entirely out of the business's own reserves. That's the exact gap BI cover exists to close.
Any business where a shutdown of more than a few days would meaningfully affect revenue — manufacturers, any business dependent on a specific physical location or piece of equipment, businesses with high fixed costs that continue regardless of whether operations are running. If your business would survive a two-week closure without financial strain, BI cover matters less. If it wouldn't, it's arguably more important than the property cover itself.
The conversation worth having with your advisor isn't "do I have fire insurance" — it's "if a fire shut me down for two months tomorrow, what would that actually cost me, and is that covered?"
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