In health insurance, MOOP stands for maximum out-of-pocket, the annual ceiling on what you pay in cost-sharing for covered in-network services. Once your deductibles, copays, and coinsurance add up to that cap, your insurer pays 100% of additional covered costs for the rest of the plan year. For 2026, the federal cap on ACA-compliant plans is $10,600 for individual coverage and $21,200 for family coverage.1HealthCare.gov. Out-of-Pocket Maximum/Limit It’s the single most important number in your plan for understanding a worst-case medical year.
How the Running Tab Works
Every deductible, copay, and coinsurance charge you pay for a covered in-network service chips away at the MOOP. Picture a tab that fills up over the year. When it hits the plan’s stated maximum, the insurer takes over the rest of your covered charges through the end of your plan year.
The plan year is the 12-month window your coverage runs on. Marketplace plans and many employer plans follow the calendar year and reset on January 1. Some employer plans start on a different date, like July 1, and reset then. When the year flips, your MOOP balance goes back to zero. That catches people off guard when they schedule expensive procedures late in the year without checking how close the new cycle is.
Premiums are separate. You keep paying them even after hitting the MOOP, because premiums buy the coverage itself and never count toward cost-sharing.1HealthCare.gov. Out-of-Pocket Maximum/Limit
The 2026 Federal Caps
Under the Affordable Care Act, all non-grandfathered health plans in the individual and group markets must cap annual cost-sharing at federally set levels. The ACA ties the initial cap to Internal Revenue Code thresholds and adjusts it each year using a premium growth formula.2Office of the Law Revision Counsel. 42 USC 18022 – Essential Health Benefits Requirements For 2026, the ceiling is $10,600 for an individual and $21,200 for a family.
These are ceilings, not required amounts. Your plan can set a lower MOOP, and many do. A gold-tier marketplace plan might cap individual out-of-pocket costs at $7,000, while a bronze plan often sits right at the federal maximum. States can also impose stricter rules, either lowering the cap further or regulating how insurers calculate cost-sharing so enrollees hit the limit accurately.
What Counts and What Doesn’t
The ACA defines cost-sharing as deductibles, coinsurance, copayments, and other qualified expenses you pay for essential health benefits.2Office of the Law Revision Counsel. 42 USC 18022 – Essential Health Benefits Requirements In practice, most of what you pay for in-network hospital stays, doctor visits, lab work, prescription drugs, and emergency care accumulates toward your MOOP.
Services generally have to come from in-network providers to count. Some plans keep separate MOOP buckets for medical and pharmacy benefits, though the combined total still can’t exceed the federal ceiling. Other plans integrate everything under one MOOP, which makes tracking simpler.
Several categories of spending never touch the balance no matter how much you pay:
- Monthly premiums.
- Out-of-network charges, outside the surprise billing situations covered below.
- Balance billing, meaning the difference between what an out-of-network provider charges and what your plan considers the allowed amount.
- Services your plan doesn’t cover, such as cosmetic procedures or treatments deemed not medically necessary.
- Routine adult dental and vision care, which most medical plans exclude entirely.
- Any portion of a bill above the plan’s negotiated allowed amount.
Family Coverage: Embedded vs. Aggregate
How MOOP works when more than one person is on the plan depends on whether the structure is embedded or aggregate, and the difference matters.
An embedded MOOP builds an individual limit into the larger family limit. Once any one family member’s cost-sharing hits the individual cap ($10,600 in 2026), the plan pays 100% of that person’s remaining covered costs for the year, even if the family total hasn’t reached the family cap. Federal rules require this: no single person on a family plan can be forced to pay more than the individual MOOP.
An aggregate MOOP is one combined limit shared by the whole family with no built-in per-person cap. Under a true aggregate structure, a single family member could theoretically absorb most of the cost-sharing before the family limit is reached. Because of the federal embedded-individual requirement, pure aggregate structures are now rare in ACA-compliant plans, but they may still appear in certain self-funded employer plans or grandfathered plans. Your Summary of Benefits and Coverage will tell you which structure your plan uses.
Lower MOOPs Through Cost-Sharing Reductions
If your household income falls between 100% and 250% of the federal poverty level, you can get a significantly lower MOOP by enrolling in a Silver plan through the marketplace. Cost-sharing reductions (CSRs) modify the Silver plan to shrink your deductible, copays, and out-of-pocket maximum.3HealthCare.gov. Cost-Sharing Reductions
For 2026, the reduced caps look roughly like this:
- Income between 100% and 200% of the federal poverty level: MOOP drops to no more than $3,500.
- Income between 200% and 250% of the federal poverty level: MOOP drops to no more than $8,450.
CSRs only apply to Silver plans. Pick a Bronze or Gold plan and you don’t get the reduction even if your income would qualify. The savings are automatic once you enroll in a qualifying Silver plan through the marketplace.
Surprise Bills and the No Surprises Act
Before 2022, out-of-network emergency care could leave you with bills that never counted toward your in-network MOOP. The No Surprises Act changed that. Plans cannot charge more cost-sharing for out-of-network emergency services than they would in-network, and any cost-sharing you pay for those emergency services must count toward your in-network deductible and MOOP as if an in-network provider had billed them.4U.S. Department of Labor. Avoid Surprise Healthcare Expenses – How the No Surprises Act Can Protect You
The same protection covers non-emergency services you receive at an in-network facility from an out-of-network provider you didn’t choose, such as an out-of-network anesthesiologist appearing during in-network surgery, and out-of-network air ambulance services. In all these situations, the cost-sharing feeds your in-network MOOP.
The law does not cover non-emergency care you voluntarily receive at an out-of-network facility. If you knowingly go to an out-of-network clinic for a routine visit, those charges still follow whatever out-of-network rules your plan sets.4U.S. Department of Labor. Avoid Surprise Healthcare Expenses – How the No Surprises Act Can Protect You
Plans That Don’t Follow the Standard Cap
Not every health plan has to respect the ACA’s out-of-pocket rules. Knowing which ones sit outside the framework can save you from a bad surprise.
Grandfathered Plans
Health plans that existed before March 23, 2010, and haven’t made certain significant changes can keep “grandfathered” status. These plans are exempt from the ACA’s annual cost-sharing limits.5Federal Register. Grandfathered Group Health Plans and Grandfathered Group Health Insurance Coverage They can set higher out-of-pocket maximums or, in some cases, no cap at all. Their numbers have declined since 2010, but some large employers still maintain them. If you’re unsure whether your employer plan is grandfathered, your Summary of Benefits and Coverage must disclose it.
Short-Term Health Plans
Short-term limited-duration insurance is not ACA-compliant. These plans don’t have to cover essential health benefits, can exclude pre-existing conditions, and are not required to include an annual out-of-pocket maximum. They tend to carry high deductibles and heavy cost-sharing with no federal ceiling on what you could owe in a bad year.
Original Medicare
Original Medicare (Parts A and B) has no annual out-of-pocket maximum. There’s no cap on what you could owe, which is why many beneficiaries buy a Medigap supplemental policy or enroll in Medicare Advantage instead.6Medicare. Costs Medicare Advantage plans (Part C) must set annual out-of-pocket limits, and many set theirs well below the federal ceiling. Separately, the Inflation Reduction Act introduced a $2,000 annual cap on out-of-pocket Part D drug spending starting in 2025, indexed to rise with per capita Part D cost growth. Part D spending does not count toward a Medicare Advantage plan’s medical MOOP; the two limits operate independently.
Checking Your Balance
Most insurers show a running tally of your MOOP progress in their online portal or app, usually under “benefits” or “spending summary.” Your Explanation of Benefits statements, sent after each claim is processed, also show how much has been applied toward your deductible and out-of-pocket maximum.
Tracking errors happen more often than you’d expect. Claims processed through a specialist’s medical group rather than the insurer directly may not appear on your EOB right away. When multiple providers bill separately for one procedure, such as surgeon, facility, anesthesiologist, and lab, the claims arrive at different times and your running total can lag. If you’re approaching your MOOP mid-year, call your insurer to verify the current balance rather than relying on the portal alone. Keep your own records of every EOB and payment; disputing an insurer’s count later is much harder without documentation.
If the Insurer Gets It Wrong
Insurers sometimes miscalculate cost-sharing or keep charging you after you’ve hit the cap. Start with your insurer’s internal appeals process. Federal rules require every non-grandfathered plan to maintain an internal claims and appeals system.7eCFR. 45 CFR 147.136 – Internal Claims and Appeals and External Review Processes File a written appeal, attach EOBs showing total cost-sharing paid, and cite the MOOP stated in your plan documents.
If the internal appeal is denied, you can escalate to an external review by an independent third party. Under the federal external review process, you have four months from the date of the final internal denial to file.8Centers for Medicare & Medicaid Services. HHS-Administered Federal External Review Process for Health Insurance Coverage Many states run their own external review programs with similar or shorter deadlines. You can also file a complaint with your state insurance department, which has authority to investigate and require corrective action.