Medical Bill & Out-of-Pocket Cost Calculator (US Health Insurance)
A medical bill and what you actually pay are two very different numbers. With US-style health insurance, your cost depends on your deductible, coinsurance, copay and out-of-pocket maximum. Enter the bill and your plan details, and this tool estimates your real cost — and how much insurance covers — before you get the surprise.
An estimate for in-network care. Out-of-network care, non-covered services and billing errors can change the real amount.
General information to help you estimate costs — not medical or insurance advice. Confirm specifics with your insurer and provider.
How to use this tool
- Enter the total bill or the estimated cost of the procedure.
- Fill in your plan: deductible (and how much you've already met), coinsurance %, any copay, and your out-of-pocket maximum.
- Press Estimate to see your likely cost and how much insurance covers.
- Ask your provider for a cost estimate and your insurer's 'explanation of benefits' to compare.
Frequently asked questions
How do deductible, coinsurance and copay fit together?
First you pay toward your deductible until it's met. After that, you pay coinsurance — a percentage of the remaining cost — while insurance pays the rest. A copay is a separate flat fee for certain visits or services. Once your total spending hits the out-of-pocket maximum, insurance covers 100% for the rest of the year.
What is an out-of-pocket maximum?
It's the most you'll pay in a plan year for covered, in-network care. Once your deductible + coinsurance + copays reach it, your insurer pays 100% of further covered costs. This calculator caps your estimated cost at the remaining out-of-pocket max if you enter one.
Why is my real bill sometimes different?
Estimates assume in-network, covered care. Out-of-network providers, services your plan doesn't cover, and billing/coding errors can all change the amount. Always review your Explanation of Benefits (EOB) and question anything that doesn't match.
Does this work outside the USA?
The deductible/coinsurance/copay model is mainly a US private-insurance structure, so it fits US plans best. In countries with single-payer or different systems the logic differs — but you can still use it for any insurance that works on a deductible-plus-coinsurance basis.
How can I lower a big medical bill?
Ask for an itemised bill and check for errors, request the cash/self-pay price, negotiate or ask about financial-assistance programs, and confirm everything was billed in-network. Many large bills are reduced significantly just by asking.