Can You Get Obamacare If You’re on Social Security?

You can enroll in Obamacare while you’re on Social Security, and you can receive premium tax credits to lower your monthly cost, as long as you’re not yet eligible for Medicare. Social Security retirement, SSDI, and survivor benefits all count as income when the Marketplace decides how much financial help you qualify for. SSI does not. The tricky part is the handoff to Medicare, which happens at 65 for most people and after a 24-month wait for SSDI recipients, and which ends your eligibility for Marketplace subsidies whether you sign up for Medicare or not.

Social Security Doesn’t Disqualify You. Medicare Does.

The basic Marketplace eligibility rules have nothing to do with Social Security. You qualify if you live in the U.S. and are a citizen, national, or lawfully present immigrant, and you can’t be incarcerated.¹ What does matter for Social Security recipients is Medicare: anyone eligible for Medicare generally cannot receive premium tax credits or cost-sharing reductions through the Marketplace.²

That distinction is where most of the confusion lives. Collecting Social Security is fine. Being eligible for Medicare is the problem. The two overlap for many people but aren’t the same thing, and the gap between them is exactly where a Marketplace plan makes the most sense: early retirees who claimed Social Security before 65, and SSDI recipients still in their 24-month qualifying period.

Once you do have Medicare, it’s actually illegal for anyone to knowingly sell you a Marketplace plan, even if you only have Part A or only Part B.³

How Your Social Security Check Affects Your Subsidy

The Marketplace uses Modified Adjusted Gross Income (MAGI) to decide how much financial help you get. Social Security retirement benefits, SSDI, and survivor benefits all count toward MAGI, and you report the full benefit amount before any deductions, including the non-taxable portion. Supplemental Security Income (SSI) does not count.⁴

For 2026, you generally need household income between 100% and 400% of the federal poverty level to receive premium tax credits.² For a single person in 2026, that’s roughly $15,960 to $63,840 per year.⁵ The enhanced subsidies that had temporarily removed the 400% cap expired at the end of 2025. As of early 2026 Congress was still considering whether to extend them, so check HealthCare.gov when you apply.

One thing that catches Social Security recipients off guard: benefits rise every year with the cost-of-living adjustment. The 2026 COLA is 2.8%, so your monthly check is higher than it was in 2025.⁶ If your income sits close to a subsidy threshold, even a small COLA bump can shrink your credits. Estimate carefully, and update your Marketplace application if your income shifts during the year.

When Medicare Eligibility Kicks In

Most people become eligible for Medicare at 65.⁷ If you receive SSDI, Medicare eligibility begins after a 24-month qualifying period from the start of your disability benefits.⁸ Once you’re eligible for premium-free Part A, you lose access to Marketplace subsidies. This happens even if you never actually sign up for Medicare.³

Two conditions shorten or eliminate the SSDI wait. People diagnosed with ALS qualify for Medicare the same month their disability benefits begin, with no waiting period.⁹ People with End-Stage Renal Disease on dialysis face a 4-month waiting period instead of 24, and those who start home dialysis training or receive a kidney transplant can qualify even sooner.¹⁰

Switching from Your Marketplace Plan to Medicare

Your Marketplace coverage doesn’t end automatically when Medicare starts. You have to log in and cancel it, and you can do that up to three months before your Medicare start date.¹¹ The goal is to end the Marketplace plan the day before Medicare begins, so you have no gap and no overlap.

Overlap is the real danger. If you keep collecting advance premium tax credits after you become Medicare-eligible, you’ll owe that money back at tax time.¹¹ And starting with the 2026 tax year, there is no cap on repayment: you owe back every dollar of excess credits.¹²

There’s a second trap. If you file for Medicare Part A late, coverage can be backdated up to six months.¹³ If your Marketplace plan was active during those retroactive months, you could be on the hook to repay the subsidies you received during that overlap.¹⁴ People who delay Medicare enrollment often don’t realize the backdating creates a subsidy repayment obligation.

Delayed Part B enrollment also carries a permanent penalty of 10% added to your monthly premium for each full year you were eligible but didn’t sign up. Staying on a Marketplace plan doesn’t shield you from it.¹⁵

What Happens to a Younger Spouse or Kids on Your Plan

When the head of household moves to Medicare, the Marketplace plan can end for everyone on it, including a younger spouse or children who don’t yet qualify for Medicare. Those family members get a Special Enrollment Period to pick a new Marketplace plan, and their coverage start date depends on when they select one.³ The plan will send a letter explaining how to re-enroll, but don’t wait for it. Start the process early so no one gets stuck without coverage.

Reconciling Your Subsidies at Tax Time

Premium tax credits are based on your projected income for the year. If your actual income comes in higher than you estimated, you took more credit than you were entitled to, and you’ll owe the difference when you file, using IRS Form 8962. From the 2026 tax year forward, there is no cap on how much excess credit you have to repay.¹² The full excess is added to your tax bill.

For Social Security recipients, the usual culprits are forgetting the annual COLA, taking an IRA distribution you didn’t plan for, or missing a spouse’s income change. Updating your Marketplace application mid-year adjusts your credits going forward and keeps the tax-time surprise small.

When Medicaid Might Fit Better Than a Marketplace Plan

If your Social Security income is low, Medicaid may cover you more completely than a Marketplace plan, often with no premiums or copays. SSI recipients automatically qualify for Medicaid in about 35 states and the District of Columbia; in those states, your SSI application doubles as your Medicaid application. A handful of states set their own eligibility rules that differ from federal SSI standards.¹⁶

Medicaid for people 65 and older or with a disability works differently than it does for younger adults. Instead of using MAGI alone, these groups are typically evaluated under SSI-based income rules, and most states also apply an asset or resource test. Owning too many countable assets can disqualify you even if your monthly income is within limits. People who need long-term care face more scrutiny: transferring assets for less than fair market value in the five years before applying can trigger a denial.¹⁷

Monthly income limits for aged, blind, and disabled Medicaid vary a lot by state, from under $500 to nearly $1,800 per month for an individual, with most states around $1,255. Contact your state Medicaid office or apply through HealthCare.gov to see whether you qualify.

How and When to Enroll

Open Enrollment runs from November 1 through January 15 each year.¹⁸ Apply at HealthCare.gov or through your state’s marketplace if your state runs one.¹ The application asks for household details, your estimated income for the coverage year (including Social Security benefits), and your tax filing status. Report the full pre-deduction Social Security amount, and leave SSI off.¹⁹

Outside of Open Enrollment, you can enroll if a qualifying life event triggers a Special Enrollment Period. The events most likely to matter for someone on Social Security are losing other coverage (60 days to enroll), moving to a new area (60 days, if you had qualifying coverage in the prior 60 days), a household change like marriage or a new child (60 days), or losing Medicaid or CHIP (90 days). Miss the window and you wait for the next Open Enrollment.²⁰

1
USA.gov. How to Get Insurance Through the ACA Health Insurance Marketplace
2
Internal Revenue Service. Eligibility for the Premium Tax Credit
3
Medicare.gov. Medicare and the Health Insurance Marketplace
4
HealthCare.gov. What’s Included as Income
5
Federal Register. Annual Update of the HHS Poverty Guidelines
6
Social Security Administration. Cost-of-Living Adjustment (COLA) Information
7
Medicare. Get Started with Medicare
8
Social Security Administration. Medicare Information
9
SSA. Amyotrophic Lateral Sclerosis (ALS) – Medicare and Five-Month Waiting Period Waived
10
Medicare. End-Stage Renal Disease (ESRD)
11
HealthCare.gov. Changing from Marketplace to Medicare
12
Internal Revenue Service. Updates to Questions and Answers about the Premium Tax Credit
13
CMS. Original Medicare (Part A and B) Eligibility and Enrollment
14
Social Security Administration. Equitable Relief for Certain Individuals Dually Enrolled in Both Medicare and a Marketplace Plan
15
Medicare. Avoid Late Enrollment Penalties
16
Social Security Administration. Medicaid Information
17
Medicaid.gov. Eligibility Policy
18
HealthCare.gov. When Can You Get Health Insurance?
19
CMS. Reporting Income on a Marketplace Application
20
HealthCare.gov. Get or Change Coverage Outside of Open Enrollment Special Enrollment Periods