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The ACA premium tax credit and Medicaid are different routes to health coverage, and being eligible for full Medicaid generally disqualifies you from the premium tax credit for those same months—even if you do not enroll in Medicaid. The Marketplace screens for Medicaid first. If you are not eligible, your state, household income, tax situation, employer coverage, and immigration status help determine whether you can get a tax credit for a private Marketplace plan.
The key income lines for 2026 and 2027 are not interchangeable: Medicaid uses current poverty guidelines under state rules, while the tax credit uses the guidelines tied to that coverage year’s open enrollment. The federal tax credit is also capped at 400% of poverty again after the temporary expansion expired.
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At a glance
| Name | Best for | Key spec | Checked |
|---|---|---|---|
| Medicaid | People who meet their state’s Medicaid eligibility rules, especially adults in expansion states with income generally up to 138% of poverty | State-administered public coverage; expansion adults generally do not pay premiums under current federal rules | November 2026 |
| ACA premium tax credit | Eligible people who are not eligible for Medicaid or other disqualifying coverage and enroll in a Marketplace plan | For 2026 and 2027, generally requires household income from 100% through 400% of poverty, plus other tax and coverage requirements | November 2026 |
What is the difference between the ACA premium tax credit and Medicaid?
Medicaid is public coverage administered by states under federal and state rules; the premium tax credit helps pay the premium for a private plan purchased through the Health Insurance Marketplace. They are not two subsidies you can simply choose between: eligibility for full Medicaid generally closes the tax-credit route for the person and months involved.
The IRS describes the Premium Tax Credit as “a refundable tax credit designed to help eligible individuals and families with low or moderate income afford health insurance purchased through the Health Insurance Marketplace, also known as the Exchange.” It can be advanced to an insurer to lower monthly premiums or claimed when filing a federal tax return. Either way, it is reconciled through Form 8962.
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Medicaid is not a tax credit, does not have a metal level, and is not reconciled on Form 8962. For the adult expansion group, financial eligibility is usually tied to income and the federal poverty guidelines, with the state Medicaid agency making or confirming the determination. Children and pregnant people may qualify under separate, often higher, state income standards.
A tax credit lowers the premium of an eligible Marketplace plan; it does not make that private plan work like Medicaid. Marketplace plans have networks, deductibles, copays, and metal levels. Medicaid benefits and cost-sharing rules are set through the state program, subject to federal requirements.
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The Marketplace generally checks whether you qualify for Medicaid or CHIP before determining whether you can get advance premium tax credits. If you are eligible for full Medicaid, that eligibility—not whether you accept or enroll in it—generally makes you ineligible for the credit for the applicable person and month.
The IRS lists Medicaid, Medicare, CHIP, and TRICARE among government coverage that can disqualify an enrolled person from the credit. The relevant test is whether the person is eligible for qualifying government coverage, not simply whether the person is enrolled. A person who qualifies for full Medicaid therefore cannot opt out of Medicaid just to receive a tax credit for a Marketplace plan instead.
Eligibility can change during a year. If Medicaid eligibility begins partway through the year, the credit may be unavailable for the months the person is eligible for Medicaid. If income rises and Medicaid eligibility ends, a person may qualify for a credit for later months, subject to the other rules and enrollment timing. Report changes to the Marketplace rather than waiting for tax filing to sort out the difference.
What are the income limits for Medicaid and Marketplace tax credits?
For most applicants, the practical threshold depends first on whether their state expanded Medicaid. In the 40 states that have implemented the ACA expansion, adults generally qualify for expansion Medicaid up to 138% of poverty; above the Medicaid line, eligible households may qualify for Marketplace tax credits through 400% of poverty. In states without full expansion, credits can generally begin at 100% of poverty, while some adults below that level fall into a coverage gap.
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The ACA statute describes the expansion adult group at 133% of poverty. A 5% income disregard brings the usual operational Medicaid threshold to 138%, as explained in Nolo’s explanation of the poverty-level calculation. The 138% figure is a general guide for the expansion adult group, not a complete eligibility test for every person or state.
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The IRS general income test says household income must be at least 100% and no more than 400% of the federal poverty line. The temporary rules that removed the 400% cap applied for 2021 through 2025 and expired at the end of 2025. For coverage years 2026 and 2027, income above 400% generally means no federal premium tax credit, though some states have their own assistance.
For a tax credit, household income is based on modified adjusted gross income (MAGI) and generally includes the taxpayer, a spouse filing jointly, and dependents claimed on the return. Wages, interest, dividends, foreign income, and Social Security can affect the calculation. The tax-credit rules also use a particular year’s poverty guidelines: the IRS says to use the most recently published guidelines on the first day of the annual open-enrollment period. Consequently, 2026 Marketplace credits use 2025 guidelines, while 2027 Marketplace credits use 2026 guidelines.
These figures show selected annual income lines for households in the 48 contiguous states and Washington, D.C. The 2026 credit thresholds use 2025 poverty guidelines; the 2027 credit thresholds use 2026 guidelines. Alaska and Hawaii use higher guidelines.
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errors| Household size | 2026 credit floor (100%) | 2026 expansion Medicaid guide (138%) | 2026 credit ceiling (400%) | 2027 credit floor (100%) | 2027 expansion Medicaid guide (138%) | 2027 credit ceiling (400%) |
|---|---|---|---|---|---|---|
| 1 | $15,650 | $21,597 | $62,600 | $15,960 | $22,025 | $63,840 |
| 2 | $21,150 | $29,187 | $84,600 | $21,640 | $29,863 | $86,560 |
| 3 | $26,650 | $36,777 | $106,600 | $27,320 | $37,702 | $109,280 |
| 4 | $32,150 | $44,367 | $128,600 | $33,000 | $45,540 | $132,000 |
Prices checked November 2026.
The income lines are screening points, not a final eligibility decision. Medicaid can have other eligibility categories, and Marketplace tax-credit eligibility also depends on tax filing status, dependents, available employer coverage, government coverage eligibility, and other rules. Medicaid uses the guidelines in effect for its determination; for example, the 2026 guideline puts the one-person 138% line at about $22,025 a year, or $1,835 a month.
State expansion status matters below 100% of poverty. In the 10 states that have not fully expanded, some adults with income below the tax-credit floor may also be ineligible for Medicaid based on their category and state rules. KFF estimates that 1.2 million people in non-expansion states fall into this coverage gap. That estimate is not a rule for every individual: people who qualify for Medicaid through another category, such as pregnancy, disability, or a state’s parent eligibility rules, may be outside the gap.
Can employer insurance stop you from getting a tax credit?
Employer coverage is a tax-credit eligibility issue, not a reason an adult fails Medicaid’s expansion income test. For 2027, an employer plan generally blocks the tax credit if it provides minimum value and the employee’s required contribution for the relevant coverage is no more than 10.22% of household income.
Minimum value means substantial coverage of physician services and inpatient hospital care, with an actuarial value of at least 60%. The IRS Revenue Procedure 2026-26 sets the 2027 required-contribution percentage at 10.22%. For 2026, a secondary compilation reports an affordability percentage of 9.96%; the applicable percentage changes by plan year, so do not apply the 2027 figure to 2026 coverage.
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The family-coverage affordability rule can produce different outcomes for one household. The Marketplace looks at the employee’s cost for self-only coverage and, where relevant, the cost of family coverage. If self-only coverage is affordable but the required family premium exceeds 10.22% of household income in 2027, eligible dependents may qualify for subsidized Marketplace coverage even while the employee remains on the job-based plan.
How much does the premium tax credit pay?
The tax credit is based on the second-lowest-cost silver plan available to the household, called the benchmark plan, and the household’s required contribution. It is not a flat benefit: a higher benchmark premium can produce a larger credit, while a lower premium or higher expected contribution can reduce it.
For 2027, the IRS applicable-percentage table sets the required contribution at 2.15% of income below 133% of poverty, with percentages increasing across income bands to 10.22% from 300% through 400% of poverty. The exact percentage within several bands rises with income. In a KFF illustration using a $6,000 annual benchmark premium, a one-person household at 133% of poverty ($21,227) contributes $686, leaving a $5,314 annual credit. At 250% of poverty ($39,900), the contribution is $3,455 and the credit is $2,545. These examples do not predict a local plan’s premium.
The credit amount is calculated against the benchmark, even if you select a different metal level. It can be applied to bronze, silver, gold, or platinum Marketplace plans, but not catastrophic plans. A cheaper eligible plan may end up with a zero monthly premium after the credit, but an unused credit is not paid to you as cash.
The credit is separate from cost-sharing reductions (CSRs), which lower deductibles and other out-of-pocket costs. People who qualify for the credit and have income from 100% through 250% of poverty may qualify for CSRs, but they must choose a silver plan to receive them. A 2026 silver plan without CSRs had an average annual deductible just over $5,300 according to KFF; KFF’s averages were about $800 for CSR 87 silver plans and about $3,700 for CSR 73 plans. Local plan designs vary. A large premium credit alone does not guarantee a low deductible.
Is Medicaid usually cheaper than a subsidized Marketplace plan?
For an adult covered through the ACA expansion, Medicaid is generally the lower-premium option: current federal rules allow premiums only for specified groups with income above 150% of poverty, while expansion adults generally qualify only up to 138%. Marketplace coverage, by contrast, can still require an income-based contribution toward the benchmark premium even after the credit.
Medicaid cost sharing is governed by state and federal rules, including exemptions and a cap on premiums plus other cost sharing for covered groups. A state may not treat a premium tax credit as if it were Medicaid coverage or offer it as a substitute for Medicaid eligibility. In 2027, expansion Medicaid also brings administrative obligations that a Marketplace tax credit does not; see the next section.
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The comparison is not just monthly premium versus monthly premium. For Marketplace coverage, check the plan’s deductible, copays, network, and whether you qualify for silver-plan CSRs. For Medicaid, check the state’s covered services and provider participation. The evidence here does not support a service-by-service comparison of adult dental, non-emergency transportation, or long-term services, which can vary by state and plan.
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Several rules make 2027 different from earlier ACA coverage years. Expansion Medicaid is scheduled to add community-engagement requirements and more frequent renewals, while the tax-credit income ceiling is back at 400% and eligibility for non-citizens narrows further.
Under the 2025 reconciliation law as summarized by LegalClarity, adults aged 19 to 64 enrolled through the ACA expansion must generally demonstrate at least 80 hours per month of work or qualifying activity beginning no later than January 1, 2027. The summary lists exemptions, including certain caregivers and people with specified medical needs or medical frailty. Expansion renewals also move from every 12 months to every six months on January 1, 2027. Implementation details can depend on state action; the available sources do not establish which states may receive an extension through 2028.
These obligations belong to the expansion Medicaid path, not to premium-tax-credit eligibility. They matter because a person may meet the income test but still need to satisfy the applicable Medicaid requirements to retain coverage. Keep notices, respond to renewal requests, and contact the state Medicaid agency promptly if a notice seems wrong or an exemption may apply.
Immigration status also changes the answer. Beginning in 2026, lawfully present immigrants with income below 100% of poverty who are ineligible for Medicaid generally cannot receive premium tax credits. Beginning January 1, 2027, Marketplace financial assistance is limited to lawful permanent residents, Cuban or Haitian entrants, and Compact of Free Association migrants. Other people may still be able to buy Marketplace coverage without a tax credit, depending on their status. Medicaid and CHIP federal funding rules for some non-citizen groups change October 1, 2026, with specified state options remaining.
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The Congressional Budget Office estimated that about 1.3 million more immigrants could become uninsured due to these Medicaid, CHIP, and Marketplace changes, as reported by State Health and Value Strategies. That estimate combines approximately 100,000 from Medicaid and CHIP changes, 300,000 from ending credits below 100% of poverty, and 900,000 from the 2027 status limit.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What happens when your income changes or you repay too much credit?
Advance premium tax credits are estimates based on expected annual household income and other circumstances. If your final allowable credit is smaller than the advance amount paid to your insurer, you reconcile the difference on Form 8962. For tax years after 2025, there is no repayment cap: excess advance credit is subtracted from your refund or added to your balance due.
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The IRS says everyone who receives advance credit must file a federal return and Form 8962, even if they otherwise might not have needed to file. If the allowable credit exceeds the advance payments, the difference can increase your refund or reduce your balance due. Medicaid months are not reconciled on Form 8962.
Report household changes to the Marketplace during the year. Important changes include income increasing or falling, a marriage or divorce, a birth or adoption, a change in dependents, moving, or gaining or losing eligibility for employer or government coverage. Lump-sum Social Security or disability payments, taxable retirement distributions, capital gains, and cancellation of debt can also affect MAGI. Updating the estimate can reduce the risk of a large repayment, especially now that excess advance payments are not capped.
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For a person who becomes Medicaid-eligible midyear, the tax-credit calculation is month-specific; the person may be eligible for credits in some months but not in Medicaid-eligible months. If income later rises out of Medicaid eligibility, ask the Marketplace about the next available enrollment route and any special enrollment period. Keep Marketplace notices and tax forms, and review Form 1095-A against the months you actually had Marketplace coverage.
How should you decide which coverage path applies?
- Start with your state and household. Identify the state where you live, your household size, and whether you are applying as an expansion adult, child, pregnant person, parent, or through another Medicaid category. The adult 138% rule does not replace other state eligibility pathways.
- Apply or update your Marketplace application. The Marketplace can screen for Medicaid or CHIP and route an eligible applicant to the state program. Give accurate household and income information rather than assuming that a Marketplace plan is an alternative you can select instead.
- Check the tax-credit rules if Medicaid does not apply. Estimate annual MAGI, confirm your tax filing situation and dependent status, and determine whether affordable minimum-value employer coverage or another government program blocks the credit. For 2026 and 2027, also check the 400% income ceiling and any immigration-status restrictions.
- Compare total coverage costs, not only premiums. For a Marketplace plan, look at the premium after credit, deductible, copays, provider network, and whether silver-plan CSRs apply. For Medicaid, check state plan rules, provider access, renewal deadlines, and any 2027 community-engagement requirements that apply to you.
- Keep the decision current. Report changes promptly, retain eligibility notices, and file Form 8962 if you received advance tax credits. If you disagree with a determination, use the appeal or review instructions in the notice rather than purchasing a second plan on the assumption that the first decision was final.
Frequently Asked Questions
Do I have to file a tax return if I had Medicaid all year?
Medicaid by itself is not reconciled through Form 8962, and Medicaid does not issue a Marketplace Form 1095-A for those months. You may still have to file for other tax reasons, so Medicaid coverage alone does not determine your overall filing obligation.
Can married people get the premium tax credit if they file separately?
Usually, a married taxpayer must file jointly to claim the credit. The IRS allows exceptions in certain cases involving domestic abuse or spousal abandonment, so someone in that situation should check the IRS rules rather than assume separate filing always ends eligibility.
If my 2026 income ends below 100% of poverty, do I have to repay my advance credit as a lawfully present immigrant?
A specific 2026 protection applies when a lawfully present non-citizen received advance credit based on an attested income from 100% to 400% of poverty and otherwise met the rules: a year-end income drop below 100% alone does not require repayment. This is a narrow exception, not a general exemption from reconciling advance credits.
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Potentially. Eligibility is assessed person by person, so one household member may qualify for Medicaid while another is evaluated for Marketplace assistance, subject to the tax household, employer-coverage, and other credit rules. Make sure the application identifies each person’s eligibility and coverage months accurately.
