• A co-insurance clause is (1) a property insurance clause that penalizes the policyholder for indemnification if the insurance limit purchased by the insured is not equal to or greater than a specified percentage (usually 80 percent) of the value of the property insured. The co-insurance clause states that the policyholder will indemnify no more than the following: the amount of the loss multiplied by the ratio of the amount of insurance purchased (insurance limit) to the amount insured (the value of the property at the date of the loss, multiplied by the coinsurance percentage), minus the deductible. The amount of loss that is not payable to the insured as a result of non-compliance with the co-insurance provision is commonly referred to as the co-insurance penalty. Commercial property insurance policies can sometimes avoid the possibility of a co-insurance penalty with an agreed value clause. (2) In health insurance and some lines of accident insurance, the percentage of losses that the insured retains. This is a form of withdrawal.