What Business Owners Need to Know About Property Insurance Coinsurance

Many business owners don't think about coinsurance until a claim happens. Understanding how a coinsurance penalty works can help avoid unexpected claim reductions and highlight the importance of regularly reviewing property values and insurance limits.

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What Is a Coinsurance Penalty?

Many commercial property policies include a coinsurance clause that requires a building to be insured to a specified percentage of its replacement cost value, often 80%, 90%, or 100%.

If the building is not insured to that required amount, the insurance company may reduce the claim payment using a coinsurance formula outlined in the policy.

A Simple Example

Let's assume:

• Building replacement cost: $1,000,000

• Coinsurance requirement: 80%

• Minimum insurance required: $800,000

• Insurance carried: $600,000

• Covered loss: $200,000

Because the building should have been insured for at least $800,000 but was only insured for $600,000, the owner was carrying only 75% of the required amount.

The coinsurance calculation would be:

$600,000 ÷ $800,000 = 75%

The insurer may then pay only 75% of the covered loss before applying any deductible.

$200,000 × 75% = $150,000 claim payment

In this example, the business owner could be responsible for the remaining $50,000, plus any applicable deductible.

Why This Surprises Business Owners

A common misunderstanding is that because the building has a $600,000 policy limit and the loss is only $200,000, the entire claim should be covered.

However, the policy's coinsurance requirement may apply regardless of whether the loss exceeds the insurance limit. If the building is underinsured compared to the policy's requirement, a penalty can occur.

The Importance of Reviewing Property Values

Property values, construction costs, and labor expenses continue to change over time. A building that was properly insured a few years ago may no longer meet today's replacement cost requirements.

Reviewing property values and insurance limits on a regular basis can help business owners better understand their exposure and reduce the chance of an unexpected coinsurance penalty after a loss.

The DRS Perspective

One of the most valuable conversations we have with commercial property owners is explaining how coinsurance works before a claim occurs. Understanding the relationship between replacement cost, policy limits, and coinsurance requirements can help business owners make better-informed insurance decisions.

Coverage depends on policy terms, conditions, exclusions, limits, carrier requirements, and individual circumstances.

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Key Questions Answered

What is a coinsurance penalty?

A coinsurance penalty is a reduction in a claim payment that may occur when a property is insured below the amount required by the policy's coinsurance provision.

Can I receive a coinsurance penalty on a partial loss?

Yes. Depending on the policy language, a coinsurance penalty may apply even when the loss amount is well below the policy limit.

How is a coinsurance penalty calculated?

Most policies compare the amount of insurance carried to the amount of insurance required. If the required amount is not met, the claim payment may be reduced proportionally.

How can I reduce the risk of a coinsurance penalty?

Regularly reviewing building values, replacement costs, and policy limits with your insurance advisor can help identify potential issues before a loss occurs.