What it means
Many business owners make the mistake of setting their insurance coverage based on historical costs, original purchase prices, or arbitrary guesses to keep monthly premiums low. However, insurers calculate payouts based on the true cost of rebuilding or replacing items at current market rates.
When a claim is made, insurers look at the relationship between what the asset was actually worth and what it was insured for. If you insured an asset for half its true value, the insurer will typically only pay half of your claim.
This practice is known as the average clause. It means you are essentially acting as your own insurer for the uncovered portion, putting your cash flow and financial stability at serious risk.
In practice, underinsurance often creeps in silently over time due to inflation, business growth, or new equipment purchases that were never added to the policy. Business leaders frequently overlook intangible assets, stock fluctuations, and specialized labor costs needed for rebuilding.
Regular asset valuations and transparent conversations with brokers help prevent this nasty surprise. Understanding this concept ensures that when you need your safety net the most, it actually catches you without unexpected financial ruin.
In practice
Real-world examples.
Example
A tech startup insures its office computers and servers for 50,000 pounds, but the true replacement cost is 100,000 pounds. After a flood causes 20,000 pounds of damage, the insurer applies the average clause and pays just 10,000 pounds.
Example
A retail SME values its warehouse inventory at 200,000 pounds year after year. Due to seasonal expansion, stock reaches 400,000 pounds when a fire occurs. Because the business was 50 percent underinsured, the payout is halved.
Example
A boutique hotel insures its historic building for 1.5 million pounds, ignoring rising construction wages and material costs. A kitchen fire causes 300,000 pounds in damage, but rebuilding costs mean the true value was 3 million pounds.
Think of it
“Imagine trying to cover a double bed with a single duvet. When you pull it to protect one cold shoulder, your feet are left completely exposed to the chilly air.
Formula
Calculation
Payout = (Insured Value / True Value) * Loss Amount
Example:
True Value = 500,000 pounds
Insured Value = 300,000 pounds
Loss Amount = 100,000 pounds
Payout = (300,000 / 500,000) * 100,000 = 60,000 pounds
Shortfall = 40,000 pounds paid by you.Case study
Seen in the real world.
Oakwood Manufacturing, a fictional mid-sized furniture maker, faced a severe reality check after a workshop fire caused 200,000 pounds worth of structural and machinery damage. Ten years earlier, the company set its property insurance limit at 500,000 pounds and simply renewed the policy automatically every year without adjustments. Following the incident, loss adjusters inspected the property and determined that inflation, machinery upgrades, and higher construction costs meant the building and equipment were actually worth 1,000,000 pounds. Because Oakwood was insured for only half of its true replacement value, the insurer applied the average clause. Instead of receiving the 200,000 pounds needed to repair the damage, Oakwood received just 100,000 pounds. The directors had to drain their working capital reserves and secure an emergency bank loan for the remaining 100,000 pounds to resume operations. This painful lesson cost the business far more in lost time and debt interest than the few hundred pounds they saved annually by not updating their policy.
Watch out
Common mistakes.
- Assuming that original purchase price equals current replacement value.
- Forgetting to update insurance policies when buying new equipment or expanding inventory.
- Skipping professional asset valuations to save money on fees.
Questions
People also ask.
How often should I review my insurance coverage?
You should review your asset values and policies at least once a year, or immediately after any major purchase or business expansion.
What is the average clause?
It is a rule insurers use to reduce claim payouts proportionally if they find your property was insured for less than its true value.
Does underinsurance only apply to buildings?
No, it applies to business interruption, stock, machinery, and any other insured asset category.
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