HomeFinance & EconomicsInsuranceWhat is Coinsurance?
Finance & Economics·2 min·Updated Mar 11, 2026

What is Coinsurance?

Coinsurance

Quick Answer

Coinsurance is a provision in insurance policies where the insured pays a certain percentage of the costs after a deductible is met. This means that both the insurer and the insured share the financial responsibility for covered expenses.

Overview

Coinsurance is a common feature in many health and property insurance policies. It typically requires the policyholder to pay a specific percentage of the costs of a claim after the deductible has been paid. For example, if a health insurance plan has a coinsurance rate of 20%, the insured would pay 20% of the medical costs while the insurance company covers the remaining 80%. This arrangement encourages policyholders to be mindful of their healthcare spending since they will be responsible for a portion of the costs. How coinsurance works can vary depending on the type of insurance. In health insurance, after you meet your deductible, you may still have to pay coinsurance for certain services. If you have a medical bill of $1,000 and your deductible is $500, you would first pay the $500 deductible. Then, if your coinsurance is 20%, you would pay an additional $100 (20% of the remaining $500), while the insurer pays the rest. Understanding coinsurance is important because it affects how much you will ultimately pay for insurance claims. It can lead to significant out-of-pocket expenses if you have a large claim, so it's essential to consider this when choosing an insurance policy. Knowing the coinsurance percentage helps you budget for healthcare costs or property damage and can influence your decision when selecting coverage options.


Frequently Asked Questions

If you don't meet your deductible, you typically won't have to pay coinsurance. Instead, you will be responsible for all costs until your deductible is satisfied.
Yes, coinsurance rates can change when you renew your insurance policy. It's important to review your policy details each year to understand any changes in your coinsurance responsibilities.
No, coinsurance and copayment are different. A copayment is a fixed amount you pay for a specific service, while coinsurance is a percentage of the total cost after the deductible.