Quick answer: The deductible is what you pay before the plan starts sharing costs. A copay is a flat fee per visit. Coinsurance is your percentage after the deductible. The out-of-pocket maximum is the ceiling on what you can lose in a year, and it is the single most important number on the page. Premiums are what you pay to have the plan at all, and they do not count toward any of those limits.
Key Takeaways
- Premiums never count toward your deductible or out-of-pocket maximum
- The out-of-pocket maximum is your worst-case ceiling and the most important number to compare
- Compare total annual exposure: 12 months of premium plus the out-of-pocket maximum
- All these limits apply to in-network care; out-of-network often has separate and higher limits
- The No Surprises Act protects you in emergencies and for out-of-network providers at in-network facilities
Health Plan Comparison Tool
Enter two plans and an estimate of your yearly medical costs. This shows what each plan actually costs you in a light year, a heavy year, and the worst case.
Plan A
Plan B
This is an estimate for in-network care. It assumes costs apply to the deductible, then coinsurance, capped at the out-of-pocket maximum. Copays, services covered before the deductible, and separate prescription tiers are not modeled. Check the Summary of Benefits and Coverage for each plan.
The four numbers, in the order money actually moves
Plan documents list these terms alphabetically, which is why they confuse people. Here is the order you actually encounter them.
Premium. A monthly charge for having coverage. You pay it whether or not you see a doctor, and it does not count toward the deductible or the out-of-pocket maximum. It is the only one of these numbers you are guaranteed to pay in full.
Deductible. The amount you pay yourself before the plan begins paying its share. On a $2,000 deductible, the first $2,000 of covered care is yours. Important exception: most plans cover preventive care and some services at a copay before the deductible is met, so read what is exempt.
Copay. A fixed dollar amount for a specific service, such as $30 for a primary care visit. Predictable, and often applies from day one.
Coinsurance. After the deductible, you pay a percentage rather than a flat fee. A plan with 20% coinsurance means a $5,000 procedure costs you $1,000. This is where large bills come from.
Out-of-pocket maximum. Once your deductible, copays, and coinsurance add up to this number, the plan pays 100% of covered in-network care for the rest of the year. Premiums do not count toward it.
Why the out-of-pocket maximum matters more than the premium
Most people compare plans by premium because it is the number in the biggest font. That answers the wrong question. The premium tells you your cost in a healthy year. The out-of-pocket maximum tells you your cost in a bad one.
The real comparison is total annual exposure: twelve months of premium plus the out-of-pocket maximum. A plan with a $200 monthly premium and a $9,000 maximum exposes you to $11,400. A plan at $380 per month with a $4,000 maximum exposes you to $8,560. The second plan costs more every month and less when something goes wrong.
Which to choose depends on whether you could absorb the worst case. If a $9,000 bill would be catastrophic for your finances, the cheaper premium is not actually cheaper.
The distinction that causes the largest surprise bills
Every number above applies to in-network care. Out-of-network care often has a separate deductible, a separate and much higher out-of-pocket maximum, or no maximum at all.
The federal No Surprises Act protects you in situations where you had no realistic choice: emergency care, and out-of-network providers working at an in-network facility, such as an anesthesiologist or radiologist you never selected. In those cases you pay in-network rates.
It does not protect you when you choose an out-of-network provider knowingly. That is why verifying network status matters before a scheduled procedure, and why “my hospital is in network” is not the same as “everyone treating me at that hospital is in network.”
What to check before choosing, in fifteen minutes
- Your doctors. Search each one in the plan’s provider directory, and call the office to confirm, since directories are frequently out of date.
- Your prescriptions. Look up each drug in the plan’s formulary and note its tier. A drug moving from tier 2 to tier 4 can cost hundreds more per month.
- Whether a referral is required. HMO plans generally require one to see a specialist; PPO plans generally do not.
- The family deductible structure. Some plans require the entire family deductible to be met before anyone gets coverage; others let each member’s individual deductible apply.
- What is exempt from the deductible. Plans that cover primary care and generics at a copay before the deductible behave very differently from plans that do not.
High-deductible plans and the HSA angle
A high-deductible health plan trades a lower premium for a larger deductible, and qualifies you to contribute to a Health Savings Account. The HSA is the only account in the tax code that is untaxed going in, growing, and coming out for medical expenses.
The arithmetic that decides it: if the annual premium savings plus any employer HSA contribution exceeds the increase in your worst-case exposure, the high-deductible plan wins even in a bad year. If it does not, you are paying for a tax benefit you may not use. Our guide to how an HSA works and who qualifies covers the contribution rules and the Medicare timing trap.
FAQ
Does my premium count toward the deductible? No. Premiums are separate from every other number and never count toward the deductible or out-of-pocket maximum.
What resets each year? Deductibles and out-of-pocket maximums reset on the plan year, which is usually January 1 but may differ for employer plans.
Is a lower deductible always better? No. It usually comes with a higher premium. Compare total annual exposure rather than any single number.
What if I get a surprise bill anyway? Ask the provider for an itemized bill, compare it to your explanation of benefits, and dispute errors. If it involves emergency care or an out-of-network provider at an in-network facility, cite the No Surprises Act.
Where can I get free help comparing plans? HealthCare.gov has assisters and navigators at no cost, and employers usually offer a benefits counseling line during open enrollment.
Sources
Last updated: August 19, 2026. Written by the InfoBrief Editorial team. Rules and prices change; confirm with the official source before acting. See our disclosure.