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What Is Coinsurance and What Does It Cover

It's in your best interest to devote some time to learning about your insurance coverage options. An insurance policy is a complicated contract that often includes terms that allocate certain duties to the user, such as the coinsurance term. There is a good chance that coinsurance is the most misunderstood and perplexing phrase in the insurance industry.


Due to the widespread misunderstanding of these types of clauses, we have compiled the fundamentals of coinsurance in an effort to clear the air. Let's get started.

What Exactly Is Coinsurance?

The term coinsurance may refer to a concept in which your insurer stipulates the policy clause about property damage coverage. There might be a coinsurance provision in your property insurance policy that mandates you obtain insurance for a certain percentage of your home's worth. That way, if you do need to file a claim, your insurer will know that you have sufficient coverage.


Generally, this term is the one to use when talking about insurance for a small company. If you come across this phrase in a policy, it refers to a condition that mandates you carry property insurance for your company at a level equal to 80% of its replacement cost.


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How Do You Figure Out Your Copayment?

In order to get a complete reimbursement in the case of a loss, the coinsurance clause in a property policy requires the policyholder to insure the property for a specified proportion of its value.


For a $1,000,000 structure with 80% coinsurance, the necessary loss coverage is $800,000. In the case of a claim, reimbursement is based on the property's cost of repairs as of the loss date. When calculating a claim payout, the coinsurance percentage is deducted from the replacement cost if it is less.


A fire that causes $200,000 in damage to an insured's premises, for instance, would result in a payout of $600,000. To determine the claim, divide the sum insured ($600,000) by the property's market value ($800,000). Multiplying the lost amount by this percentage (in this case, 75%; $200,000 x 75% = $150,000) yields the total amount of compensation due. If an insured had a deductible of $5,000 and filed a claim for $200,000, the insured would get $150,000.

What Policies Contain a Coinsurance Provision?

A provision that allows for coinsurance is often included in property insurance contracts. There is also the possibility of a coinsurance provision being included in inland marine insurance plans. Ensuring the full market value may be a requirement of certain policies.


By adding an agreed sum endorsement to the policy, the coinsurance provision that is normally written into the policy wording can be omitted for the duration of the policy.


In this case, the insurer and the insured both agree that the total insurable value (TIV) specified on the statement of values is sufficient, such that the coinsurance clause will not apply in the event of a loss.

What Is the Purpose of Coinsurance in Insurance Policies?

Certain insurance companies don’t include a provision for coinsurance in their contracts. But those who do, often do so for one of the following three reasons:


  • To provide customers peace of mind that they're adequately protected. We may argue that this is the most crucial. You may not be eager to spend as much as is necessary to insure everything you own, but if disaster strikes, you'll be glad you did.

  • In an attempt to protect their supply. If your company has a lot of valuable assets, there is a greater likelihood that anything might go wrong and result in a claim being filed. It is in everyone's best interest for the insurance company to have policyholders purchase coverage according to their risk level.

  • To promote honest evaluation and underwriting. When you are compelled to satisfy coinsurance restrictions, you are more likely to make an accurate evaluation of the worth of your assets, which is to the long-term advantage of the insurance provider (as well as to your own benefit).

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Final Words

So, yes: coinsurance is a common clause in insurance policies, and it's not that difficult to understand. It's your responsibility to learn the ins and outs of your coverage options, and if you don't read the fine print on your policy, you might end up paying more than you had to for a service or product. Be sure to take the time to read through your insurance policies in full.


When in doubt, call your broker or insurance provider and ask. They are there to help you with any questions and help you solve any issues you may have.

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