What Is the Out-of-Pocket Maximum? Insurance Term Explained

The out-of-pocket maximum (OOPM) is the most you have to pay for covered healthcare services in a plan year. After you spend this amount on deductibles, copays, and coinsurance, your insurance plan pays 100% of covered in-network services for the rest of the plan year. For 2026, the ACA sets the federal maximum at $9,450 for individuals and $18,900 for families. Your specific plan's OOP maximum may be lower than these federal caps but cannot exceed them.

Definition

The out-of-pocket maximum is a financial safety net built into your health insurance plan. It caps your total annual cost-sharing — the combined total of your deductible payments, copays, and coinsurance — for covered in-network services. Once you reach this threshold, the plan pays 100% of covered services for the remainder of the plan year, with no further cost-sharing from you.

Key aspects of the out-of-pocket maximum:

• What counts: deductible payments, copays, and coinsurance for covered in-network services
• What does not count: Monthly premiums, out-of-network charges (unless the plan has a combined OOP max), non-covered services, and balance-billed amounts
• Individual vs. family maximum: Family plans have both individual and family maximums. Once one family member reaches the individual embedded maximum, the plan pays 100% for that person even if the family maximum has not been reached.
• In-network vs. out-of-network: Most plans have separate, higher OOP maximums for out-of-network services. Some plans have no out-of-network OOP maximum at all, meaning your out-of-network costs are unlimited.

For HSA-eligible high-deductible health plans (HDHPs), the IRS sets separate OOP maximum limits, which for 2026 are $8,300 for self-only coverage and $16,600 for family coverage. If your plan is an HSA-eligible HDHP, verify which limit applies.

How the Out-of-Pocket Maximum Works in Practice

Consider this example: You have a plan with a $2,000 deductible, 80/20 coinsurance, and a $9,000 out-of-pocket maximum. You undergo surgery with an allowed amount of $60,000.

1. You pay the first $2,000 (deductible) — running OOP total: $2,000
2. Remaining $58,000 subject to 80/20 coinsurance: you owe 20% = $11,600
3. But your OOP maximum is $9,000. After paying $7,000 in coinsurance (total OOP now $9,000), you hit the maximum.
4. The insurer pays 100% of the remaining $51,000 — and 100% of all covered in-network services for the rest of the year.

Common Reasons for OOP Maximum Disputes

Disputes about the out-of-pocket maximum are more common than many people realize:

• Insurer not tracking payments correctly: The insurer fails to credit all your copays, deductible payments, or coinsurance toward the OOP maximum, causing you to pay more than the maximum.
• Certain costs excluded from accumulation: Some plans exclude specific copays (like prescription drug copays) from the OOP maximum accumulation. While some exclusions are permitted, they may not comply with ACA requirements for all plan types.
• Services still denied after hitting the maximum: Reaching the OOP maximum means the plan pays 100% — but only for covered services. If the insurer denies a service as not covered, the OOP maximum does not apply to that service. The distinction between "covered but with cost-sharing" and "not covered" is critical.
• Out-of-network costs not applied: If you received care from an out-of-network provider and the plan has separate in-network and out-of-network OOP maximums, the out-of-network costs may not count toward your in-network maximum and vice versa.
• Plan year confusion: If you have reached the OOP maximum but the plan year resets, costs after the reset date start accumulating from zero. Patients sometimes assume the maximum carries over.

How to Appeal an OOP Maximum Dispute

1. Track every payment yourself. Maintain a spreadsheet listing every deductible payment, copay, and coinsurance amount for the plan year. Include the date, provider, service, and amount. Compare your total to the insurer's accumulator on your member portal or by calling customer service.
2. Request an accumulator report. Call your insurer and ask for a detailed report showing every claim applied to your OOP maximum. Review it for missing credits, duplicate entries, and errors.
3. Check your SBC for what counts. Your Summary of Benefits and Coverage specifies which costs count toward the OOP maximum. If the insurer is excluding costs that your SBC says should count, cite the SBC in your appeal.
4. File a formal appeal if the insurer is not crediting payments correctly. Your appeal letter should include your own tracking records, the insurer's accumulator report, your SBC, and a clear explanation of the discrepancy.
5. Cite ACA regulations. Under ACA Section 1302, the annual OOP maximum applies to all essential health benefits. If your insurer is excluding essential health benefit costs from the OOP accumulator, this may violate federal law.
6. File a state insurance department complaint for persistent tracking errors. If the insurer systematically undercounts patient cost-sharing, this may constitute an unfair claims practice that affects many policyholders.

What Regulations Protect You

• ACA, Section 1302(c): Establishes the annual OOP maximum and requires that it apply to all essential health benefits. The 2026 limits are $9,450 for individuals and $18,900 for families.
• ACA, 45 CFR 156.130: Specifies which cost-sharing amounts must count toward the annual OOP maximum and prohibits plans from excluding essential health benefit cost-sharing from the accumulator.
• IRS Revenue Procedure (annual): Sets separate OOP maximum limits for HSA-eligible HDHPs, which are lower than the ACA maximums.
• No Surprises Act: Requires that cost-sharing for emergency services and certain out-of-network services be calculated as in-network and count toward the in-network OOP maximum.
• ERISA: Requires employer-sponsored plans to administer benefits in accordance with plan documents, including the stated OOP maximum.

Tips for a Stronger Appeal

• Start tracking at the beginning of the plan year. Do not wait until you think you are close to the maximum. Track from January 1 (or your plan's start date) so you have a complete record if a dispute arises.
• Request an EOB for every service. Every Explanation of Benefits shows the amount applied to your deductible, copay, coinsurance, and running OOP total. Save every EOB and reconcile it with your own records.
• Schedule planned procedures strategically. If you are approaching the OOP maximum, scheduling elective procedures before the plan year resets can save thousands of dollars because the plan will pay 100% once the maximum is reached.
• Verify that your insurer is counting prescription drug costs. Under ACA rules, prescription drug cost-sharing for essential health benefits must count toward the OOP maximum. Some insurers have incorrectly excluded these costs, particularly for specialty medications.

If your insurer is not properly tracking or honoring your out-of-pocket maximum, start your free claim analysis with ClaimBack. We generate a professional appeal letter that cites the specific regulations requiring the insurer to honor the OOP maximum and correct any tracking errors.

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