Coinsurance (Percentage Participation)

Coinsurance, also known as percentage participation, is a cost-sharing mechanism in insurance where the policyholder and the insurance company share the cost of covered losses or expenses in a specified proportion. The policyholder pays a percentage of the total cost, and the insurance company pays the remaining percentage, up to the policy limit.

Some key features of coinsurance include:

• Percentage participation: Coinsurance is expressed as a percentage, such as 80/20 or 70/30. This indicates the proportion of the cost that the policyholder and the insurance company will pay, respectively.

• Policy limits: The coinsurance clause may have a specific limit on the amount that the insurance company will pay. If the total cost of the loss or expense exceeds the policy limit, the policyholder may be responsible for the remaining amount.

• Deductibles: Coinsurance may be subject to a deductible, which is the amount that the policyholder must pay out of pocket before the coinsurance clause is applied.

• Encourages risk-sharing: Coinsurance is intended to encourage policyholders to share in the risk of losses or expenses, as it reduces the insurance company's exposure to losses and can help to keep premiums lower.

For example, suppose a business owner has a commercial property insurance policy with a coinsurance clause of 80/20. The policy has a limit of $500,000 and a $10,000 deductible. The business owner experiences a fire that causes $600,000 in damage to the property. The business owner would be responsible for paying the $10,000 deductible, and then the coinsurance clause would apply. The business owner would pay 20% of the remaining $590,000, or $118,000, while the insurance company would pay 80%, or $472,000. However, because the total cost of the loss exceeds the policy limit of $500,000, the business owner would also be responsible for the remaining $100,000.