In most cases, you cannot have both Medicaid and an ACA Marketplace plan at the same time. The two programs are designed to serve different income levels, and if you qualify for Medicaid, you are generally not eligible for ACA premium tax credits. However, there are real-world situations where the two briefly overlap, and knowing the rules can save you from paying for coverage you do not need or missing a window to switch programs without a gap.
Quick Answer: You cannot receive ACA premium tax credits while enrolled in Medicaid. If you qualify for Medicaid, you must enroll there instead of taking subsidized Marketplace coverage. If your income rises above your state's Medicaid limit, losing Medicaid is a qualifying life event that opens a Special Enrollment Period for ACA plans.
Why You Generally Cannot Have Both
The ACA was designed so Medicaid and Marketplace plans work as a system, not two separate programs you stack on top of each other. When you apply through HealthCare.gov or your state exchange, the application first checks whether you qualify for Medicaid or CHIP. If you do, the system routes you to Medicaid. If you do not, it shows you Marketplace plans with any subsidies you qualify for.
The rule is straightforward: if you are enrolled in Medicaid and your income still qualifies you for Medicaid, you cannot receive a premium tax credit (subsidy) for a Marketplace plan. Buying a Marketplace plan without a subsidy while on Medicaid is technically possible but almost never financially sensible, since Medicaid typically costs nothing or close to it.
Where the Income Line Falls in 2026
The dividing line between Medicaid and ACA Marketplace eligibility depends on whether your state expanded Medicaid under the ACA, and on your household size.
Medicaid Expansion States (38 states plus DC)
Adults qualify for Medicaid up to 138% of the Federal Poverty Level (FPL). Above that, Marketplace subsidies begin.
| Household Size | Medicaid Limit (138% FPL) | ACA Subsidy Range (100-400% FPL) |
|---|
| 1 person | ~$20,782/year | $15,060 to ~$60,240 |
| 2 people | ~$28,208/year | $20,440 to ~$81,760 |
| 3 people | ~$35,634/year | $25,820 to ~$103,280 |
| 4 people | ~$43,056/year | $31,200 to ~$124,800 |
Income figures are based on 2025 FPL guidelines used for 2026 Marketplace enrollment. Medicaid figures use 138% FPL for expansion states.
If your income is between 100% and 138% FPL in an expansion state, Medicaid covers you. Between 138% and 400% FPL, you qualify for a subsidized Marketplace plan. Above 400% FPL, you can still buy a Marketplace plan but without a premium tax credit.
Non-Expansion States (12 states)
In states that did not expand Medicaid, the cutoff for Medicaid coverage for adults is often much lower, sometimes as low as 13-18% FPL for parents and effectively zero for childless adults. This creates what advocates call the "coverage gap": adults who earn too much for Medicaid and too little for ACA subsidies. If you live in a non-expansion state and your income falls in this gap, you may not qualify for either program.
The non-expansion states as of 2026 are: Alabama, Florida, Georgia, Kansas, Mississippi, South Carolina, Tennessee, Texas, Wisconsin, Wyoming, and a small number of others. Use the CoveredUSA screener to check your specific state situation.
When Both Programs Briefly Overlap
There are legitimate situations where Medicaid and Marketplace coverage can exist in the same household or during the same calendar period.
Different family members on different programs
It is common for a household to have some members on Medicaid and others on a Marketplace plan. For example, if two parents earn just above the Medicaid limit but their children qualify for Medicaid or CHIP based on income rules for minors, the children stay on Medicaid while the parents enroll in a Marketplace plan. This is not "dual coverage" for one person but it is normal for a mixed household.
The transition window when income changes
If your income increases and you lose Medicaid eligibility, you have a Special Enrollment Period (SEP) of up to 90 days (in most states) to enroll in a Marketplace plan. During this window there may be a short administrative period where your Medicaid coverage has not yet terminated while you are selecting a Marketplace plan. This overlap is procedural rather than intentional but is not a problem.
The same works in reverse. If your income drops and you become eligible for Medicaid mid-year, Medicaid can enroll you immediately. You would then cancel your Marketplace plan to avoid paying both premiums.
CHIP and ACA plans
Children in households just above the Medicaid limit may qualify for the Children's Health Insurance Program (CHIP) regardless of whether parents are on a Marketplace plan. A parent can hold an ACA plan while their child is covered by CHIP. CHIP is technically separate from Medicaid in many states but uses the same application process.
What Happens When You Lose Medicaid
As of 2026, the Unwinding period from the COVID-era continuous enrollment requirement has added millions to the pool of people transitioning off Medicaid. If your state terminates your Medicaid coverage, that loss of Minimum Essential Coverage triggers a Special Enrollment Period. You have:
- 60 days in most standard qualifying life events
- 90 days in most states specifically for loss of Medicaid or CHIP
You can use this window to enroll in a Marketplace plan with a premium tax credit, assuming your income is at or above 100% FPL. Do not wait. The SEP window is strict, and missing it means waiting until the next Open Enrollment period (typically November 1 through January 15 for coverage starting January 1 or February 1).
The Coverage Gap Problem in Non-Expansion States
If you live in a state that has not expanded Medicaid and your income is below 100% FPL, you may fall into the coverage gap. You do not qualify for Medicaid because the state's eligibility threshold is too low. You also do not qualify for ACA subsidies because those start at 100% FPL. As of 2026, Congress has not addressed this gap for non-expansion states.
If you are in this situation, your options include:
- Check whether your state has any partial Medicaid programs for parents, pregnant individuals, or people with disabilities, which often have separate and sometimes more generous income rules.
- Look for community health centers, which operate on sliding-scale fees and serve patients regardless of insurance status.
- Check if your employer offers coverage, which may change your eligibility calculation.
- Run your numbers through the CoveredUSA eligibility screener to make sure you have not missed a program you qualify for.
How to Avoid a Coverage Gap When Switching Programs
The biggest practical risk when moving between Medicaid and Marketplace coverage is a gap in coverage. Here is how to avoid it:
Step 1: Report income changes promptly. If your income changes and you think you may lose Medicaid, report it to your state Medicaid agency. This starts the formal determination process and ensures you get proper notice of termination with time to act.
Step 2: Apply to the Marketplace before your Medicaid ends. You do not have to wait for Medicaid to actually terminate to start a Marketplace application. You can apply during your SEP as soon as you know you will lose coverage.
Step 3: Set your Marketplace plan start date carefully. When you enroll in a Marketplace plan after losing Medicaid, you can typically choose a coverage start date of the first of the month following enrollment or the first of the following month. Coordinate this to avoid paying for a Marketplace plan during a month Medicaid still covers you.
Step 4: Cancel properly. Once your Marketplace plan starts, formally disenroll from Medicaid if your state has not already done so. In some cases the state handles this automatically when income is reported. In others you need to submit a disenrollment request.
ACA Open Enrollment Dates for 2026 Coverage
If you are not experiencing a qualifying life event, you can only enroll in Marketplace coverage during Open Enrollment. For 2026 coverage, Open Enrollment ran November 1 through January 15, 2025 on HealthCare.gov and in most states. For 2027 coverage, Open Enrollment will run November 1, 2026 through January 15, 2027.
Outside of Open Enrollment, you need a qualifying life event to enroll. Loss of Medicaid is one of the most common qualifying events and one that triggers the extended 90-day window.
How to Check Which Program You Qualify For
If you are unsure whether you fall under Medicaid or ACA Marketplace coverage in 2026, the fastest way to find out is to run a quick eligibility check. The key factors that determine your path are:
- Your state (expansion vs. non-expansion)
- Your household size
- Your annual income as a percentage of FPL
- Your age (under 65 for Medicaid and ACA; Medicare applies at 65)
- Your immigration and citizenship status
Check your eligibility now at CoveredUSA -- it takes 2 minutes. Use our free screener at /screener to see whether you qualify for Medicaid, a subsidized Marketplace plan, or both programs for different family members. Results are free, instant, and available in Spanish.
Frequently Asked Questions
Can I be on Medicaid and have an ACA plan at the same time?
Generally no. If you qualify for Medicaid based on income, you are not eligible for ACA premium tax credits. You can buy a Marketplace plan without subsidies while on Medicaid, but this rarely makes financial sense since Medicaid usually has little to no premium cost.
What if I qualify for Medicaid but want an ACA plan instead?
You can decline Medicaid and enroll in a Marketplace plan, but you would not receive a premium tax credit. The subsidy specifically cannot be paid when you are eligible for Medicaid. For most people in expansion states, Medicaid is the better financial choice when income is at or below 138% FPL.
Can my kids be on Medicaid while I have an ACA plan?
Yes. This is very common. Children in your household may qualify for Medicaid or CHIP at a higher income threshold than adults. You can enroll the children in Medicaid or CHIP while you and your spouse enroll in a subsidized Marketplace plan.
What is the income limit to qualify for Medicaid vs ACA subsidies in 2026?
In expansion states, Medicaid covers adults up to 138% FPL (about $20,782 for a single person in 2026). ACA subsidies apply from 100% to 400% FPL. In non-expansion states, Medicaid limits vary widely and can be much lower. Check your state-specific limits at CoveredUSA.
If I lose Medicaid, how long do I have to get an ACA plan?
You have 60 days in most states, and up to 90 days specifically for loss of Medicaid or CHIP, to enroll in a Marketplace plan through a Special Enrollment Period. This window starts on the date your Medicaid coverage ends.
Do I need to do anything special to switch from Medicaid to a Marketplace plan?
Yes. You should report the loss of Medicaid to the Marketplace when you apply. You will need a notice of termination from your state Medicaid agency as proof. Then you select a plan and choose a start date. The Marketplace plan will start the first or second month after you apply.
What happens if I accidentally have both Medicaid and a subsidized ACA plan?
If you receive ACA premium tax credits while also enrolled in Medicaid during the same period, you may have to repay those tax credits when you file your federal income taxes. The IRS reconciles premium tax credits based on your actual year-end income and coverage status. If this happens, contact your Marketplace and state Medicaid agency to correct the overlap as quickly as possible.
Has anything changed for Medicaid and ACA eligibility in 2026?
Yes. Enhanced premium tax credits that expanded subsidy eligibility above 400% FPL expired at the end of 2025. This means subsidies are no longer available above 400% FPL as of 2026. Additionally, a low-income Special Enrollment Period that previously allowed people below 150% FPL to enroll year-round was eliminated in mid-2025 through regulatory changes. These changes make it more important than ever to enroll during Open Enrollment if you do not have a qualifying life event.
