Co-Insurance

Co-insurance is a policy provision that requires you to insure a property to a minimum percentage of its actual value, typically 80 percent. If your coverage falls short of that threshold, the carrier pays only a proportional share of any claim, not the full damage amount, even when the loss is well below your stated policy limit. It is one of the most financially punishing mechanics in commercial property insurance, and one of the least understood.

How does the co-insurance penalty calculation work?

Suppose your building would cost $1,000,000 to rebuild and your policy carries an 80 percent co-insurance requirement. You are obligated to insure it for at least $800,000. If you only carry $500,000 and suffer a $200,000 fire loss, the carrier does not simply pay $200,000. The penalty calculation divides what you insured by what you were required to insure: $500,000 divided by $800,000 equals 62.5 percent. The carrier pays 62.5 percent of the $200,000 loss, or $125,000. You absorb the remaining $75,000 out of pocket, despite having an active policy and a loss amount far below your limit.

For example, a Georgia retail owner who insures a $900,000 replacement-cost structure at only $600,000 would pay the co-insurance penalty on any partial loss, including a minor roof claim well below the policy limit. For example, a warehouse owner who last updated the building limit in 2018 may now be below the 80 percent threshold simply because construction costs have risen, even though the coverage amount itself never changed.

Which policies typically include a co-insurance clause?

Co-insurance provisions appear most often on commercial property policies, including retail, office, and warehouse coverage, as well as landlord dwelling policies on rental homes. Residential homeowners policies generally handle underinsurance through separate mechanisms, such as replacement cost value conditions, rather than a traditional co-insurance clause. If you own commercial real estate, an investment property, or a building you lease to tenants, a co-insurance clause is almost certainly embedded in your coverage. Our FAQ on which businesses qualify for a BOP explains how co-insurance interacts with business owners policies.

Why are Georgia property owners especially exposed to co-insurance penalties?

Construction costs in metro Atlanta and across Georgia climbed sharply from 2020 onward, driven by labor shortages and material price increases. A building insured at a limit that felt adequate in 2019 or 2020 may now be significantly below the 80 percent threshold, even though nothing about the policy itself changed. The coverage did not shrink; the replacement cost grew past it. That gap is invisible until a claim surfaces it.

How can an agreed value endorsement eliminate the co-insurance penalty?

Some carriers offer agreed value endorsements that suspend the co-insurance requirement in exchange for carrying a coverage amount the insurer has already validated. The practical safeguard without that endorsement is an annual comparison of the insured building limit against a current replacement cost estimate. Our FAQ on replacement cost vs. actual cash value explains how those valuations differ. Our FAQ on BOP cost vs. separate policies in Georgia is useful context for commercial property owners weighing coverage structures. A coverage review with an Olive Cover advisor is the most direct way to check whether your current building limit meets your co-insurance requirement.