Early retirement health insurance
ACA Subsidy Cliff 2026: How One Dollar Can Cost You $10,000
For four years, ACA premium subsidies phased out gently no matter how much you earned. That ended December 31, 2025. In 2026 the hard cliff is back: earn one dollar over 400% of the poverty level and your entire subsidy disappears. For early retirees, this is the single most expensive line in the tax code to get wrong.
Updated September 2026 · 9 min read
The short version
- What changed: enhanced premium tax credits expired December 31, 2025. The original ACA subsidy structure is back, with a hard cutoff at 400% of the federal poverty level.
- The 2026 cliff: $62,600 (single), $84,600 (married couple), $128,600 (family of four). One dollar over and the whole subsidy is gone.
- What counts: MAGI includes Roth conversions, capital gains (even at 0% federal tax), dividends, and taxable Social Security.
- The stakes: losing the subsidy can mean $10,000 to $30,000 per year in extra premiums for the same plan.
- The fix: manage MAGI year by year with withdrawal sequencing, gain timing, and HSA contributions. NestCalc models the cliff in every simulation year.
What the subsidy cliff actually is
The Affordable Care Act helps people who buy their own health insurance by offering premium tax credits that lower the monthly bill. How much help you get depends on your income, measured as Modified Adjusted Gross Income (MAGI) relative to the federal poverty level (FPL) for your household size.
Under the original ACA design, that help had a hard edge: above 400% of FPL, you got nothing. Not a smaller credit. Nothing. From 2021 through 2025, temporary enhanced credits replaced that edge with a gentle slope and removed the income cap entirely. Those enhancements are gone now, and the cliff is back in its original form.
The 2026 thresholds by household size
For 2026 coverage, 400% of the federal poverty level works out to:
| Household size | 400% FPL (the cliff) |
|---|---|
| 1 (single) | $62,600 |
| 2 (married couple) | $84,600 |
| 3 | $106,600 |
| 4 | $128,600 |
Each additional household member adds roughly $22,000. The figure that matters is your MAGI for the coverage year itself (2026 income for 2026 coverage), not last year's tax return. And it is your household's MAGI, so a working spouse's income counts too.
What counts toward MAGI (and what does not)
ACA MAGI starts with your adjusted gross income and adds back tax-exempt interest, excluded foreign income, and the nontaxable portion of Social Security. For early retirees, the surprises are what does count:
- Roth conversions: every converted dollar is ordinary income in your MAGI this year.
- Capital gains: counts even when your federal tax rate on the gain is 0%. Harvesting gains in a "low income" year can quietly push you over the cliff.
- Dividends and interest: all of it, including qualified dividends.
- Traditional IRA and 401(k) withdrawals: fully counted (except after-tax basis).
- Taxable Social Security benefits: up to 85% of benefits can land in MAGI.
What stays out of MAGI: original Roth IRA contribution withdrawals (principal only, not earnings), qualified HSA withdrawals used for medical expenses, return of your cost basis when you sell taxable investments (only the gain counts), and loan proceeds such as a home equity line of credit. These are the levers planners pull to fund spending without raising MAGI.
How expensive is one dollar over?
Take a 60-year-old couple buying an unsubsidized Silver plan at roughly $2,100 per month, or about $25,000 per year. With a premium tax credit at their income level, they might pay $6,000 per year out of pocket. The credit is worth roughly $19,000.
If their MAGI lands at $84,600, they keep the credit and pay $6,000. If a December mutual fund distribution or a small Roth conversion pushes them to $84,601, the credit goes to zero and they owe the full $25,000. One dollar of extra income, $19,000 of extra cost. That is not a typo, and nobody at the marketplace will call to warn you.
Strategies to stay under the cliff
Sequence withdrawals by MAGI impact
In pre-Medicare years, fund spending from the lowest-MAGI sources first: taxable account basis, Roth contribution principal, HSA dollars for medical costs, and cash. Save traditional IRA withdrawals and Roth conversions for years when you have headroom, or for after 65 when the cliff no longer applies.
Time capital gains deliberately
If you need to realize gains (rebalancing, trimming a concentrated position), bunch them into a single year and accept going over the cliff that year, rather than drifting $2,000 over the line three years in a row. One expensive year beats three.
Use HSA contributions to shave MAGI
HSA contributions reduce MAGI dollar for dollar. If you are eligible, maxing family HSA contributions can buy several thousand dollars of headroom under the cliff while building tax-free medical funds.
Watch December surprises
Mutual fund capital gain distributions, often announced in December, land in that year's MAGI whether you like it or not. Check estimated distributions before year-end and leave a buffer under the cliff, not a $500 margin.
Model it year by year
The cliff interacts with everything: Roth conversions raise MAGI, capital gains raise MAGI, and traditional withdrawals raise MAGI. Optimizing one year in isolation misses the tradeoff. You need a plan that prices the subsidy in every year from retirement until Medicare at 65.
See your cliff exposure year by year
NestCalc models ACA subsidies against your projected MAGI in every simulation year, so you can see exactly which years are at risk and how much headroom your withdrawal plan leaves.
Run the free calculator →What if you go over anyway?
When you apply for marketplace coverage you estimate your income for the year. The IRS reconciles the difference at tax time: if your actual MAGI ends up over the cliff, you repay the entire premium tax credit you received. There is no repayment cap once you cross 400% FPL, which is how a wrong estimate becomes a five-figure surprise in April.
If you realize mid-year that income is running hot, you still have options before December 31: harvest capital losses to offset gains, make deductible HSA contributions, or if self-employed, accelerate deductible business expenses. After year-end, the number is locked.
Frequently asked questions
What is the ACA subsidy cliff in 2026?
If your Modified Adjusted Gross Income exceeds 400% of the federal poverty level, you lose your entire ACA premium tax credit. For 2026 that is $62,600 for a single person, $84,600 for a married couple, and $128,600 for a family of four. Go $1 over and the subsidy drops to zero.
Why did the ACA subsidy cliff come back?
The enhanced premium tax credits from the American Rescue Plan (2021), extended through 2025 by the Inflation Reduction Act, expired on December 31, 2025. Congress did not renew them, so the original ACA subsidy structure with its hard 400% FPL cutoff is back in force for 2026.
Do Roth conversions count toward MAGI for ACA subsidies?
Yes. Every dollar of a Roth conversion counts as ordinary income in your MAGI for the year, even though it was after-tax money going in. This is one of the most common planning traps for early retirees: a conversion that saves future taxes can wipe out this year's ACA subsidy.
Do capital gains count toward MAGI even if taxed at 0%?
Yes. Capital gains count toward ACA MAGI even when your federal income tax rate on them is 0%. Harvesting gains in a low-income year can push you over the subsidy cliff without generating any federal income tax.
What income does not count toward ACA MAGI?
Original Roth IRA contribution withdrawals (principal only), qualified HSA withdrawals for medical expenses, return of cost basis from taxable accounts (only the gain counts), and loan proceeds such as a home equity line of credit do not count toward ACA MAGI.
What happens if I estimate my income wrong on my ACA application?
The IRS reconciles your premium tax credits when you file your return. If your actual MAGI ends up over the cliff, you repay the entire subsidy you received. There is no cap on repayment when you cross 400% FPL, so a wrong estimate can mean a five-figure tax bill in April.