Deductibles, Copays, and Out-of-Pocket Max

One of the most important — and confusing — aspects of US health insurance is cost-sharing: the amounts you pay out of your own pocket when you receive medical care, separate from your monthly premium. US health plans use four main cost-sharing mechanisms: the deductible, copays, coinsurance, and the out-of-pocket maximum. Understanding how these four elements work together is essential to knowing what you will owe for a given service.

The deductible: your annual threshold

The deductible is the amount you pay each plan year for covered services before your insurer begins sharing costs. Until you reach this threshold, you pay the full cost of most covered services (at the plan’s negotiated rate, not list price).

For example, if your deductible is a certain amount and you have a planned surgery, you will pay out of pocket for covered medical costs up to that amount. After that, cost-sharing kicks in — you typically pay a percentage (coinsurance) and the insurer pays the rest, up to your out-of-pocket maximum.

Not all services are subject to the deductible. Preventive care services, for instance, must be covered at no cost to the enrollee under the ACA, regardless of whether the deductible has been met. Many plans also exempt primary care visits or certain generic drugs from the deductible. Your plan’s Summary of Benefits and Coverage (SBC) document, which insurers are required to provide, lists which services are and are not subject to the deductible.

Some plans have separate deductibles for different types of services — for instance, a medical deductible and a separate prescription drug deductible. Some family plans have both individual and family deductibles; the family deductible aggregates across members until the threshold is met.

Copays: fixed amounts per service

A copay is a flat dollar amount you pay each time you receive a specific type of service, regardless of the total cost of the service. Common examples include a fixed amount for a primary care visit, a different amount for a specialist visit, a separate amount for an emergency room visit, and per-prescription amounts at different drug tiers.

Copays may or may not apply before you reach your deductible, depending on the plan design. Some plans require the deductible to be met first, then apply copays. Others apply copays from day one for certain services (like office visits) while the deductible applies to other services (like hospital care). Check your SBC to understand when copays apply for each service category.

Copays generally count toward your out-of-pocket maximum. Once your total out-of-pocket spending — including copays, deductible payments, and coinsurance — reaches the maximum, you pay nothing more for covered in-network services for the rest of the plan year.

Coinsurance: your percentage share

Coinsurance is your share of the cost of a covered service after you have met your deductible. It is expressed as a percentage. For example, a plan might cover a certain percentage of the allowed amount for a covered service, with the enrollee responsible for the remaining percentage.

The percentage is applied to the plan’s allowed amount — the rate negotiated between your insurer and the in-network provider — not the provider’s full list price. This distinction matters: the allowed amount for a procedure may be substantially lower than what the provider would charge an uninsured patient.

Coinsurance applies across a wide range of services — hospital care, specialist visits, lab tests, imaging, physical therapy, and others. Some services may use copays instead of coinsurance; many plans use coinsurance for higher-cost services.

The out-of-pocket maximum: your annual ceiling

The out-of-pocket maximum is the most you will pay for covered in-network services during a plan year. Once you reach this limit, the insurance plan pays 100% of covered costs for the remainder of the year. The out-of-pocket maximum is not optional — the ACA requires all non-grandfathered health plans to have one, and CMS sets an upper limit on how high it can be (adjusted annually).

What counts toward the out-of-pocket maximum varies by plan, but typically includes deductible payments, copays, and coinsurance for covered in-network services. Premiums, out-of-network costs, and costs for non-covered services do not count.

Plans may have separate out-of-pocket maximums for different types of costs (medical vs. drug) or for in-network vs. out-of-network care. Read your SBC carefully to understand how these limits interact.

How the pieces fit together: a worked example

To see how these elements work together, consider a person who has a planned outpatient procedure mid-year. At the start of the plan year, they have not met any of their deductible. They pay for covered medical costs at the plan’s negotiated rate until the deductible is met. After that, they pay only their coinsurance percentage for further covered services. Each copay for follow-up office visits also counts toward the out-of-pocket maximum. Once total out-of-pocket spending reaches the maximum, the plan pays 100% of covered in-network costs for the rest of the year.

Premiums paid each month do not reduce or count toward these thresholds — they are the cost of maintaining coverage, separate from the cost of using it.

Comparing high-deductible and traditional plans

The table below compares how cost-sharing works under a typical High-Deductible Health Plan (HDHP) versus a traditional plan. Exact figures vary by insurer and plan year.

Feature	Traditional plan	High-Deductible Health Plan (HDHP)
Annual deductible	Lower (e.g., $500–$1,500 individual)	Higher (IRS minimum $1,650 individual for 2025)
Monthly premium	Higher	Lower
Copays before deductible	Yes, for many common services such as office visits	Typically no — most services apply to the deductible first
HSA eligibility	Not eligible	Eligible — enables a pre-tax Health Savings Account
First-dollar coverage	Preventive care only	Preventive care only
Best suited for	Frequent healthcare users who prefer predictable copays	Relatively healthy individuals with savings to cover the deductible

What this looks like in practice

Imagine Maria, who has a traditional PPO plan with a $1,000 individual deductible, 20% coinsurance after the deductible is met, and a $5,000 out-of-pocket maximum.

In January, she visits her primary care doctor. Her plan exempts primary care visits from the deductible, so she pays only her $30 copay. That copay counts toward her out-of-pocket maximum.

In March, she has an outpatient imaging study. The allowed amount — the negotiated rate between her insurer and the in-network facility — is $800. Because she has not met her deductible, she pays the full $800, which goes toward satisfying her $1,000 deductible.

In April, she sees a specialist. The allowed amount is $400. She owes the remaining $200 of her deductible, plus 20% coinsurance on the remaining $200 (an additional $40). Her share for that visit is $240. Her deductible is now fully met.

For the rest of the year, she pays only 20% of the allowed amount for covered in-network services. Her running total of deductible payments ($800 + $200), copays ($30), and coinsurance ($40) equals $1,070. If her cumulative out-of-pocket spending reaches $5,000 before year-end, the plan pays 100% of covered in-network costs for the remainder of the plan year.

Her monthly premiums do not count toward any of these thresholds. They are the cost of keeping coverage active, not the cost of using it.

Step by step: tracking your cost-sharing through the year

1. At the start of your plan year, locate your Summary of Benefits and Coverage (SBC). Note your deductible amount, copay amounts for common services (primary care, specialist, ER), your coinsurance percentage, and your out-of-pocket maximum.
2. Check which services are exempt from the deductible. Your SBC includes a “What you will pay” table that shows whether each service category requires the deductible to be met first or applies a copay from day one.
3. After each service, log into your insurer’s member portal and review the Explanation of Benefits (EOB) for that claim. The EOB shows how much of your deductible has been applied to date.
4. Keep a running log of every amount you pay — deductible portions, copays, coinsurance — with the date and provider. Billing errors do occur; your records are your evidence if there is a discrepancy.
5. If you have an HSA or FSA, use those funds to pay qualifying cost-sharing expenses and keep receipts. HSA withdrawals for non-qualified expenses are subject to taxes and penalties.
6. In the second half of the plan year, if you are close to your out-of-pocket maximum, consider scheduling elective but necessary services before year-end. Once the maximum is met, those services cost you nothing.
7. When the plan year resets, your deductible and out-of-pocket maximum return to zero. Any costs you incurred in the previous year do not carry over — you start accumulating again from the first of the new plan year.

Documents and terms you will see

When navigating deductibles and cost-sharing, you will encounter the following terms in your plan documents and billing statements.

• Deductible — the annual amount you pay for covered services before your insurer begins sharing costs
• Copay — a fixed dollar amount you pay per covered service, regardless of the total cost of that service
• Coinsurance — your percentage share of the allowed cost for a covered service, applied after the deductible is met
• Out-of-pocket maximum — the annual ceiling on your total cost-sharing; the insurer pays 100% of covered in-network costs above this amount
• Premium — your monthly payment to maintain coverage, which does not count toward your deductible or out-of-pocket maximum
• HDHP — a High-Deductible Health Plan that meets IRS criteria and qualifies you to contribute to a Health Savings Account