Cut MAGI Below 400% FPL: ACA Cliff Fix Saves $9,000

The decision: David is $11,400 over the cliff

David is 56, single, and lives in Ohio. He was laid off in March 2026 with a severance package, and his projected 2026 MAGI — severance, the wages he earned before the layoff, a modest taxable brokerage dividend, and a few months of unemployment — lands at $74,000. He wants a Silver marketplace plan for the rest of the year.

The problem: 400% of the federal poverty level for a household of one in 2026 is roughly $62,600. At $74,000 of MAGI, David is about $11,400 over the line. For 2026 coverage, the statutory ACA subsidy cliff returns — meaning $1 over 400% FPL drops his premium tax credit to $0. At his age, in his rating area, that lost credit is worth roughly $9,000 a year.

Here is the move. David makes a $7,500 deductible traditional IRA contribution and a $4,400 HSA contribution. Both reduce his Adjusted Gross Income, and ACA MAGI is built on AGI. His projected MAGI falls from $74,000 to about $62,100 — under the $62,600 line. The cliff disappears, and roughly $9,000 of premium tax credit comes back. The two contributions cost him $11,900 of cash flow, but $7,500 of that is his own retirement money and $4,400 is his own medical money — both still his. He has not spent the money; he has relocated it.

Why MAGI is the only number that matters here

The ACA premium tax credit (IRC §36B) is sized off household MAGI for the coverage year, not your prior-year income and not your gross pay. For marketplace purposes, MAGI starts with your Adjusted Gross Income (Form 1040 line 11) and adds back three items most people do not have after a layoff: tax-exempt interest, the excluded portion of foreign earned income, and the non-taxable portion of Social Security benefits.

That construction is the entire opportunity. Anything that legitimately lowers your AGI also lowers your marketplace MAGI, because for most laid-off filers the three add-backs are zero. The deductions that reduce AGI — deductible IRA contributions, HSA contributions, and pre-tax payroll deferrals that never reached your W-2 — are the levers. Itemized deductions (mortgage interest, state taxes, charitable gifts) do not help: those come off below AGI and have no effect on MAGI.

The 400% FPL cliff: a true cliff for 2026

From 2021 through 2025, the American Rescue Plan and Inflation Reduction Act removed the hard cliff and capped benchmark premiums at 8.5% of income at every level. Unless Congress extends that relief, the statutory cliff at 400% FPL returns for the 2026 coverage year. That changes the math from a gentle phase-out to a guillotine.

Under the cliff rules, you receive a premium tax credit only if household MAGI is at or below 400% FPL. One dollar over — $62,601 for a single filer in this example — and the credit is $0. Worse, if you took advance premium tax credits during the year and then close the year over the line, you must repay the entire advance amount when you reconcile on Form 8962. There is no repayment cap above 400% FPL. This is why a few thousand dollars of MAGI can be worth five figures.

These figures use the 2025 HHS poverty guidelines that govern 2026 marketplace eligibility in the 48 contiguous states (Alaska and Hawaii use higher guidelines). Confirm the exact line for your household on healthcare.gov before you target a number, because the cliff is computed to the dollar.

Lever 1: the deductible traditional IRA — up to $7,500

The 2026 traditional IRA contribution limit is $7,500, with a $1,000 catch-up for those 50 and older (IRC §219(b)(5)), so David at 56 can put in $8,500. Because it is an above-the-line deduction, it drops AGI — and therefore MAGI — without itemizing.

The trap is the active-participant deduction phase-out (IRC §219(g)). If you were covered by a workplace retirement plan for any part of 2026 — including the months before your layoff — your traditional IRA deduction phases out:

• Single, active participant: full deduction below $79,000 MAGI, fully phased out at $89,000.
• Married filing jointly, you are active: full deduction below $126,000, gone at $146,000.
• MFJ, only your spouse is active: full deduction below $236,000, gone at $246,000.
• Not covered by any workplace plan in 2026: no income limit on the deduction at all.

David was in his employer’s 401(k) through March, so he is an active participant for 2026. But at a target MAGI around $62,000 he is comfortably under the $79,000 single threshold, so his $7,500 (or $8,500) is fully deductible. If your projected MAGI sits inside the phase-out band, the deduction shrinks — which is exactly the income range where the HSA and 401(k) levers do more work.

Lever 2: the HSA — up to $4,400, no income limit

If you are enrolled in an HSA-eligible high-deductible health plan — some marketplace plans (often, but not always, Bronze) carry an "HSA-eligible" designation — you can contribute $4,400 self-only or $8,750 family in 2026 (IRC §223(b)), plus a $1,000 catch-up at 55+. To qualify in 2026 the plan must have a deductible of at least $1,700 self-only / $3,400 family and cap out-of-pocket at $8,500 / $17,000 (IRC §223(c)), so confirm the "HSA-eligible" label before you contribute. The HSA deduction is the cleanest MAGI lever in the code: it is above-the-line on Schedule 1, has no income phase-out, and is never subject to an active-participant test the way the IRA deduction is.

David is 55+, so his real HSA ceiling is $4,400 + $1,000 = $5,400 if he is on an HSA-eligible plan. In the worked example we use the base $4,400 to stay conservative. The HSA dollars are triple-advantaged: deductible going in, tax-free growth, and tax-free out for qualified medical expenses — and after a layoff, medical costs are exactly what an HSA is built to absorb.

Lever 3: pre-tax 401(k) deferrals before your last paycheck

The largest lever is the one that closes first. Every dollar you defer pre-tax into your 401(k) before your separation date — up to $24,500 in 2026, plus an $8,000 catch-up at 50+ (IRC §402(g)) — never appears in Box 1 of your W-2, so it never enters AGI or MAGI. Front-loading deferrals on your final paychecks can pull thousands out of MAGI in a single payroll cycle.

The constraint: this only works while you are still on payroll. Once the W-2 stops, you cannot defer into the old plan. If you see a layoff coming, raising your deferral percentage on the last two or three checks is the highest-leverage move available — and unlike the IRA, it has no income phase-out and no active-participant trap.

David’s math, line by line

David spends $11,900 to reclaim about $9,000 of subsidy — but the $11,900 is not spent. It is $7,500 in his IRA and $4,400 in his HSA, both still his money, both growing tax-advantaged. The subsidy is pure recovery on top. And because Ohio taxes traditional IRA and HSA contributions the same way the federal code does, the moves shave his Ohio income tax as well. Even setting the retirement and medical value aside, swinging from $0 credit to a $9,000 credit on roughly $12,000 of redeployed-but-still-owned cash is one of the highest-return moves available after a layoff.

The ordering rule: stack the no-limit levers first

When you need to cross the cliff, the order you pull levers matters, because the IRA deduction can phase out while the others cannot:

1. Pre-tax 401(k) deferrals while still employed — biggest dollar capacity ($24,500 + $8,000 catch-up), no income limit, but the window closes at separation.
2. HSA contribution — $4,400 / $8,750, no income phase-out, requires an HSA-eligible plan; you have until the tax-filing deadline to fund it.
3. Deductible traditional IRA — up to $7,500 / $8,500, but watch the active-participant phase-out if you were in a workplace plan in 2026.

You also have until the tax-filing deadline (April 15, 2027 for 2026) to make IRA and HSA contributions and have them count for the 2026 coverage year. That is the safety valve: you reconcile on Form 8962 at filing, so even if your year ended slightly over the line, a deductible IRA or HSA contribution made before you file can pull final MAGI back under 400% FPL and rescue the credit retroactively.

What most people miss: the Roth trap and the itemizing myth

Two mistakes routinely cost people the subsidy.

Myth 1: “I’ll fund a Roth IRA to lower my income.” A Roth IRA contribution does nothing for ACA MAGI. Roth contributions are made with after-tax dollars and create no deduction, so AGI — and therefore MAGI — is unchanged. If your goal is to get under the cliff, the contribution must be to a deductible traditional IRA, not a Roth. The same logic kills the idea of a Roth conversion in a cliff year: a conversion raises MAGI and can throw you over the line, repaying the entire credit.

Myth 2: “I’ll itemize more deductions to drop my income.” Itemized deductions — mortgage interest, state and local taxes, charitable gifts — come off below AGI and have zero effect on MAGI. Only above-the-line adjustments move the number that healthcare.gov reads. The 2026 standard deduction of $15,750 (single) is irrelevant to the subsidy calculation entirely. Chasing itemized deductions to beat the cliff is wasted effort.

A third quiet trap: taxable investment income you control. Realizing a large capital gain, or holding a high-dividend taxable position, in a cliff year pushes MAGI up. If you are close to the line, deferring a gain into the next year — or harvesting an offsetting loss — can be the difference between $9,000 of credit and $0.

When MAGI engineering cannot save you

The levers have ceilings. If your projected MAGI is, say, $95,000 as a single filer, the maximum realistic reduction — $7,500 IRA + $5,400 age-55 HSA — is about $12,900, which still leaves you around $82,000, well over the $62,600 line. At that point the cliff is unwinnable through contributions alone, and the decision shifts to COBRA versus an unsubsidized marketplace plan, where COBRA’s group pricing can sometimes beat a full-freight individual plan. That is the comparison covered in the $100K-MAGI companion guide linked below.

The MAGI-reduction play wins specifically when you are within reach of the line — roughly within $12,000 to $13,000 of 400% FPL as a single filer, or further if you are still employed and can run pre-tax 401(k) deferrals before separation.

The lever to pull

If you are projected over 400% FPL for 2026 and within about $12,000 of the line, fund a deductible traditional IRA and an HSA before you file — in that combination they move marketplace MAGI dollar-for-dollar, the money stays yours, and crossing under the cliff can reclaim roughly $9,000 of premium tax credit on a single household-of-one return. Run your exact 400% FPL number for your household size on healthcare.gov, project your full-year MAGI conservatively (severance plus pre-layoff wages plus unemployment plus any taxable investment income), and size the contributions to land just under the line with a few hundred dollars of cushion. If you are still on payroll, raise your 401(k) deferral on the final checks first — that window closes the day your W-2 stops.