How do you calculate coinsurance and deductible?

Asked by: Prof. Travon Klocko  |  Last update: December 6, 2025
Score: 4.1/5 (52 votes)

Example of coinsurance with high medical costs Allowable costs are $12,000. You'd pay all of the first $3,000 (your deductible). You'll pay 20% of the remaining $9,000, or $1,800 (your coinsurance). So your total out-of-pocket costs would be $4,800 — your $3,000 deductible plus your $1,800 coinsurance.

Does 80% coinsurance mean I pay 80%?

What does 80/20 coinsurance mean? Simply put, 80/20 coinsurance means your insurance company pays 80% of the total bill, and you pay the other 20%. Remember, this applies after you've paid your deductible.

What is the coinsurance formula?

The simple formula for calculating the coinsurance penalty is: amount of insurance in place / Amount of insurance that should have been in place x the loss, less any deductible is the amount actually paid.

Does 20% coinsurance mean you pay 20%?

Coinsurance – Your share of the costs of a covered health care service, calculated as a percent (for example, 20%) of the allowed amount for the service. You pay the coinsurance plus any deductibles you owe. If you've paid your deductible: you pay 20% of $100, or $20.

How do I calculate my coinsurance amount?

Assuming you've used an in-network medical provider, the coinsurance amount is calculated based on the network-approved price, NOT the amount that was initially billed. Coinsurance rate (as a decimal figure) x total cost = coinsurance you owe.

How to Calculate Patient and Payer Responsibility (Copay vs Coinsurance vs Deductible)

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How to calculate coinsurance and deductible?

Example of coinsurance with high medical costs

Allowable costs are $12,000. You'd pay all of the first $3,000 (your deductible). You'll pay 20% of the remaining $9,000, or $1,800 (your coinsurance). So your total out-of-pocket costs would be $4,800 — your $3,000 deductible plus your $1,800 coinsurance.

What is the 80% rule for coinsurance?

The 80% rule means that an insurance company will pay the replacement cost of damage to a home as long as the owner has purchased coverage equal to at least 80% of the home's total replacement value.

Is it better to have a copay or coinsurance?

Is it better to have a $700 Co-Pay for your hospital visit or a 30% Co-Insurance? Again, the Co-Pay is going to be less expensive. Co-Pays are going to be a fixed dollar amount that is almost always less expensive than the percentage amount you would pay. A plan with Co-Pays is better than a plan with Co-Insurances.

What if I need surgery but can't afford my deductible?

In cases like this, we recommend contacting your insurance, surgeon, or hospital and asking if they can help you with a payment plan. Remember that your surgery provider wants to get paid so they may be very willing to work with you on a payment plan.

Do you pay coinsurance after the deductible is met?

A deductible is the amount you pay for coverage services before your health plan kicks in. After you meet your deductible, you pay a percentage of health care expenses known as coinsurance. It's like when friends in a carpool cover a portion of the gas, and you, the driver, also pay a portion.

What is coinsurance for dummies?

Coinsurance is a portion of the medical cost you pay after your deductible has been met. Coinsurance is a way of saying that you and your insurance carrier each pay a share of eligible costs that add up to 100 percent. The higher your coinsurance percentage, the higher your share of the cost is.

What is a good amount for coinsurance?

Until you reach your deductible, you'll pay for 100% of out-of-pocket costs. After you meet your deductible, you and your insurance company each pay a share of the costs that add up to 100 percent. Typical coinsurance ranges from 20% to 40% for the member, with your health plan paying the rest.

What are the rules for coinsurance?

Coinsurance is the percentage under an insurance plan that the insured person pays toward a covered expense or service. Coinsurance kicks in after the policy deductible is satisfied. One of the most common coinsurance breakdowns is the 80/20 split: The insurer pays 80%, the insured 20%.

Do copays count towards deductible?

No. Copays and coinsurance don't count toward your deductible. Only the amount you pay for health care services (like the medical bill you receive) count toward your plan's deductible.

Do ER visits go towards deductible?

A deductible is a specified amount that you must pay annually for your medical care before your health insurance pays any of your medical expenses. Importantly, if you obtain emergency treatment at the beginning of your policy year, those bills will likely go toward meeting your deductible.

What is the difference between a deductible and a coinsurance?

The difference between deductibles and coinsurance is related to when payments are due and how they accumulate. Coinsurance benefits only kick in after the deductible has been paid in full. Until then, policyholders can still get financial assistance through copays.

Do I have to pay my deductible upfront for surgery?

In other situations, including a pre-scheduled surgery, the hospital or other providers can ask for at least some payment upfront. But in most cases, a health plan's network contract with the hospital or other medical provider will allow them to request upfront payment of deductibles, but not to require it.

How to meet your health insurance deductible fast?

Consider these ways to meet your deductible before the end of the year.
  1. Order a 90-day supply of your prescription medicine. ...
  2. See an out-of-network doctor. ...
  3. Pursue alternative treatment. ...
  4. Get your eyes examined.

What happens if you get surgery and can't pay?

You can take steps to make sure that the medical bill is correctly calculated and that you get any available financial or necessary legal help. If you do nothing and don't pay, you could be facing late fees and interest, debt collection, lawsuits, garnishments, and lower credit scores.

Is 80% coinsurance high?

After you meet your annual health insurance deductible, you share medical costs with your insurer until the end of the plan year. Your percentage of those costs is called coinsurance. Your coinsurance may be high (80% to 100%) or low (0% to 20%). Typically, it is less than 50%.

What is the difference between a PPO and a HMO?

HMO plans typically have lower monthly premiums. You can also expect to pay less out of pocket. PPOs tend to have higher monthly premiums in exchange for the flexibility to use providers both in and out of network without a referral. Out-of-pocket medical costs can also run higher with a PPO plan.

How do you avoid coinsurance?

For the insurance to protect you as expected, maintaining the appropriate insurance limit is a must to avoid the coinsurance penalty. What is the insurance limit? The insurance limit in a property-insurance policy is the maximum amount that the insurer will pay for a covered loss.

How do you calculate coinsurance?

How Do You Calculate Coinsurance on a Property? To calculate the coinsurance penalty, divide the amount of current insurance coverage by the required insurance amount and multiply that result by the loss or cost to repair the property.

Does coinsurance apply to total loss?

Coinsurance as it applies to Property Insurance. Because most property losses are partial and not total losses, the average insured will take advantage of this tendency and only insure enough to cover a partial loss.

Why is my coinsurance 100%?

What does it mean to have a 100% coinsurance? Unfortunately, if you have a 100% coinsurance, this means that you are responsible for the entire service fee. This will be paid out-of-pocket and likely does not have any eligibility for reimbursement.