Yes, 401(k) withdrawals generally count as income for Obamacare. Any taxable distribution from a traditional 401(k) flows into the Modified Adjusted Gross Income figure the Marketplace uses to size your Premium Tax Credit, and in 2026 that matters more than it has in years: the 400% federal poverty level subsidy cliff is back, and the caps that once limited how much excess subsidy you’d owe back at tax time are gone.1Office of the Law Revision Counsel. 26 USC 36B – Refundable Credit for Coverage Under a Qualified Health Plan2Internal Revenue Service. Updates to Questions and Answers About the Premium Tax Credit
The Marketplace measures your income as MAGI, which begins with the Adjusted Gross Income on line 11 of your federal return and adds back tax-exempt interest and the non-taxable portion of Social Security.3Healthcare.gov. Income4Internal Revenue Service. Modified Adjusted Gross Income A taxable retirement withdrawal is already inside your AGI, so it lands in MAGI dollar for dollar.
Which 401(k) Withdrawals Raise Your MAGI
Traditional 401(k) Distributions
Every dollar out of a traditional 401(k) is taxable ordinary income, because the contributions and their growth were never taxed.5Internal Revenue Service. 401(k) Resource Guide – Plan Participants – General Distribution Rules The taxable amount reported in Box 2a of your Form 1099-R is what feeds your MAGI.6Internal Revenue Service. Form 1099-R 2025
Roth 401(k) Distributions
A qualified Roth 401(k) distribution is entirely tax-free and does not touch your MAGI. To qualify, you need to have held the account at least five tax years and be 59½ or older, disabled, or taking the distribution after death.7Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts If those conditions aren’t met, the earnings portion is taxable and does hit your MAGI; the after-tax contributions themselves come back tax-free.
Hardship Withdrawals
A hardship withdrawal is fully taxable on any previously untaxed money. The emergency justification earns no MAGI break.8Internal Revenue Service. 401(k) Plan Hardship Distributions – Consider the Consequences If you’re under 59½, a 10% early withdrawal penalty may apply on top; that penalty is a separate tax and doesn’t itself raise MAGI, but the underlying distribution does.
Rollovers
A direct rollover from a 401(k) into an IRA or a new employer plan is not income. The taxable amount reported is zero and your MAGI is unaffected.9Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions An indirect rollover works too if you redeposit the full amount into another qualified account within 60 days; miss the deadline or fall short on the amount, and the shortfall becomes taxable income.10Internal Revenue Service. Topic No. 413, Rollovers From Retirement Plans
401(k) Loans
Borrowing from your 401(k) isn’t a distribution and doesn’t affect your MAGI while you repay on schedule. If the loan defaults or you leave your job without repaying within the plan’s required timeframe, the outstanding balance becomes a deemed distribution and is fully taxable.11Internal Revenue Service. Retirement Plans FAQs Regarding Loans A defaulted loan is a common way people accidentally blow past a subsidy threshold.
What Crossing the Income Line Costs in 2026
Premium Tax Credits scale with income relative to the federal poverty level. Households between 100% and 400% of FPL qualify for a credit that reduces monthly premiums, with the credit shrinking as income rises.12Internal Revenue Service. Eligibility for the Premium Tax Credit
From 2021 through 2025, the American Rescue Plan and the Inflation Reduction Act removed the 400% ceiling, so households above that line still got some help capping their premiums at 8.5% of income. That rule expired on January 1, 2026, and Congress did not extend it.13Office of the Law Revision Counsel. 26 USC 36B The cliff is back and it’s abrupt. A single person at $63,839 in MAGI still qualifies. At $63,841, the credit is zero. There is no phase-out at the top edge.
The reconciliation math also changed. When you enroll, the Marketplace pays Advance Premium Tax Credits to your insurer based on your estimated income. At tax time, Form 8962 compares what you received to what you actually qualified for.14Internal Revenue Service. Reconciling Your Advance Payments of the Premium Tax Credit In prior years, excess advance credits you had to repay were capped between $375 and $3,250 depending on income and filing status. Starting with the 2026 tax year those caps are gone; you repay the full excess, with no ceiling.2Internal Revenue Service. Updates to Questions and Answers About the Premium Tax Credit
Put those two changes together and a mid-year 401(k) withdrawal that pushes you above 400% FPL can eliminate your credits for the whole year and hand you a bill for every advance dollar the Marketplace already paid your insurer.
The 2026 Income Thresholds That Matter
These are the 2026 FPL figures for the 48 contiguous states, alongside the 400% line where subsidies cut off entirely:15Federal Register. Annual Update of the HHS Poverty Guidelines
- Single person: FPL $15,960; 400% = $63,840
- Household of 2: FPL $21,640; 400% = $86,560
- Household of 3: FPL $27,320; 400% = $109,280
- Household of 4: FPL $33,000; 400% = $132,000
Consider a single retiree with $45,000 in pension and Social Security income who takes a $20,000 traditional 401(k) distribution. MAGI jumps to $65,000, crosses the $63,840 threshold, and wipes out the year’s Premium Tax Credit.
Cost-Sharing Reductions Have Their Own Lower Cutoff
Premium Tax Credits are not the only benefit on the line. If your MAGI sits between 100% and 250% FPL and you enroll in a Silver plan, you also qualify for cost-sharing reductions that lower your deductible, copays, and out-of-pocket maximum.16HHS.gov. Eligibility for Insurance Affordability Programs For a single person in 2026, 250% FPL is $39,900. A 401(k) withdrawal that pushes you across that line can strip out-of-pocket protections worth several thousand dollars even while you still qualify for some premium help.
Required Minimum Distributions Create Income You Can’t Refuse
Starting at age 73, you have to take required minimum distributions from a traditional 401(k) each year.17Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs There’s a carve-out if you’re still working for the sponsoring employer and own less than 5% of the business, but most Marketplace enrollees at that age aren’t in that position. RMDs are fully taxable and count in MAGI whether you needed the money or not. The required amount grows as the life-expectancy divisor shrinks, and for someone with a sizable balance, the RMD alone can sit near the 400% cliff.
One workaround: roll the 401(k) into a traditional IRA, then make qualified charitable distributions directly from the IRA to a charity. A QCD satisfies your RMD without the distributed amount being included in taxable income.18Internal Revenue Service. Important Charitable Giving Reminders for Taxpayers You must be at least 70½, the transfer must go straight to a qualified charity, and QCDs cannot be made directly from a 401(k), so this takes advance planning.
How to Keep a Withdrawal From Wrecking Your Subsidy
ACA eligibility is measured one calendar year at a time, so timing and account selection are your main levers.
- Spread withdrawals across years. Taking $20,000 over three years keeps each year’s MAGI lower than pulling $60,000 at once and may preserve credits every year.
- Draw from Roth accounts first when you’re on a Marketplace plan. Qualified Roth distributions don’t touch MAGI.7Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts
- Consider a Roth conversion in a genuinely low-income year, such as between retiring and starting Social Security. The conversion is taxable and adds to MAGI that year, so cap it at an amount that keeps you within your subsidy range.
- Use QCDs for charitable giving if you’re 70½ or older; the gift covers RMDs without lifting MAGI.
- Report the income change to the Marketplace the moment you take a distribution, so it can lower your monthly advance credits for the rest of the year. A smaller subsidy now beats a full-freight repayment in April, especially with the caps gone.19Internal Revenue Service. 2025 Instructions for Form 8962
Run the numbers before you take the withdrawal. Once the distribution is on a 1099-R, the MAGI is set for the year and the Marketplace math follows automatically.