How to Avoid IRMAA in 2026: The Income Cliffs and the Roth-Conversion Ceiling

The 2026 IRMAA cliff table — and the dollar cost of crossing each line

IRMAA is not a graduated surcharge. It is a cliff: one dollar of MAGI over the threshold bumps your premium to the next tier for the entire year. There is no phase-in, no partial adjustment. You are either below the line or you are paying the full surcharge — for twelve months.

These are the 2026 IRMAA brackets, based on your 2024 MAGI (the two-year lookback):

Extra cost / yr = (Part B increase + Part D surcharge) × 12 months vs the base tier. Couple assumes both spouses on Medicare. Source: CMS 2026 Medicare Premiums & Cost Sharing; IRMAA determination based on 2024 MAGI per IRC § 1839(i).

That first cliff is the one that catches most retirees: a married couple whose 2024 MAGI lands at $206,001 instead of $205,999 pays $2,105 more per year in Medicare premiums. There is no proportional adjustment — it is the full surcharge, all twelve months. The decision tree below is built around keeping you under whichever cliff is nearest to your actual income.

The two-year lookback: why 2024 income is what matters right now

IRMAA uses a two-year lag. Your 2026 Medicare premiums are set by your 2024 MAGI. Your 2027 premiums are set by your 2025 MAGI. By the time Social Security sends the determination letter, the income that triggered it is already filed and locked.

This is the part most retirees miss. If you retired in January 2025 and your income dropped, your 2025 income might be low — but your 2026 premiums still reflect 2024, when you were working full-time. You will pay the surcharge for a year that no longer represents your financial reality. (The appeal process via Form SSA-44 exists for this scenario — more on that below.)

The planning implication: every income decision you make this year (2026) determines your 2028 IRMAA. If you are doing Roth conversions, harvesting capital gains, or taking large IRA distributions in 2026, those amounts are baked into your 2028 Medicare premiums. Plan the conversion now; pay the IRMAA consequence in 28 months.

Decision branch 1: you are 2–5 years from Medicare (ages 60–63)

This is the highest-leverage window. You are not yet on Medicare, which means IRMAA does not bite yet — but every dollar of MAGI you generate now sets the surcharge for the year you turn 65. The strategy is aggressive Roth conversion during the gap years between retirement and Medicare enrollment.

The Roth conversion ceiling

Your conversion ceiling is the IRMAA threshold minus all other income. If you are a married couple expecting $72,000 in Social Security at 70, a small pension of $20,000, and maybe $10,000 in dividends and interest, your non-conversion MAGI is roughly $102,000. That leaves $104,000 of room before you cross the $206,000 MFJ cliff.

But here is the real math: if you are 62 and have not yet claimed Social Security, your non-conversion MAGI might be only $30,000 (dividends, part-time income, small pension). That gives you $176,000 of conversion headroom below the $206,000 line. These early-retirement, pre-SS, pre-Medicare years are the widest conversion window you will ever have. You can fill the 12% and 22% federal brackets (MFJ taxable income up to $96,950 and $206,700 respectively, per 2026 brackets) while staying under the IRMAA cliff.

After the standard deduction of $31,500 (MFJ, 2026), $206,000 of MAGI means roughly $174,500 of taxable income — well inside the 22% bracket. You are paying 10–22% now to avoid 24%+ later when RMDs and SS push you up. And you are avoiding an IRMAA surcharge that would pile on top.

Your conversion ceiling in this branch: $206,000 (MFJ) or $103,000 (single) minus all other MAGI sources. Convert up to that line each year. Do not cross it unless the tax arbitrage from the conversion exceeds the IRMAA cost — and it rarely does at the first cliff.

Decision branch 2: you are on Medicare and pre-RMD (ages 65–72)

You are now subject to IRMAA, but RMDs have not started yet (RMD age is 73 for those born 1951–1959, 75 for those born 1960+, per SECURE 2.0 § 107). This is still a conversion window — narrower than branch 1, but still open, because you control how much comes out of the Traditional IRA each year.

The conversion-vs-IRMAA trade-off

Every dollar you convert adds to MAGI. The question is whether the future tax savings from shrinking the Traditional balance (and future RMDs) justify the IRMAA surcharge you might trigger this year. Here is the worked example:

A 67-year-old single retiree has $900,000 in a Traditional IRA, $36,000 in Social Security, $8,000 in dividends. Non-conversion MAGI: $44,000. She wants to convert as much as possible before RMDs start at 73.

• Convert $59,000: total MAGI = $103,000. Stays at or just under the first IRMAA cliff. Part B stays at $185/mo. Federal tax on the conversion: roughly $6,500 (fills 12% bracket, barely touches 22%). IRMAA cost: $0.
• Convert $85,000: total MAGI = $129,000. Crosses the first cliff but stays below the second. IRMAA cost: $1,052/year. Federal tax on the extra $26,000 at 22%: ~$5,720. Total extra cost to convert $26,000 more: ~$6,772. Worth it? Only if her projected RMD-year bracket (likely 24%+ with $900K growing to $1.2M by 73) saves more than $6,772 in future tax.
• Convert $117,000: total MAGI = $161,000. Hits the third IRMAA tier. IRMAA cost: $2,804/year. The conversion starts to look expensive unless her future bracket is 32%+.

The rule of thumb: in this branch, size your conversion to stay below the nearest IRMAA cliff unless you can show at least a 10-percentage-point bracket arbitrage (e.g., paying 22% now vs 32% later). Below that spread, the IRMAA surcharge eats most of the savings.

Decision branch 3: you are 73+ and RMDs are pushing you over

This is the branch where IRMAA hits hardest — and where you have the fewest levers. RMDs are mandatory: at age 73, the IRS Uniform Lifetime Table divisor is 26.5. On a $1,000,000 Traditional IRA, that is a $37,736 RMD. On $1,800,000 (not unusual for a dual-earner couple), it is $67,924. Add Social Security and you can blow past an IRMAA cliff without any voluntary action.

Lever 1: QCDs — the cleanest IRMAA reduction

A Qualified Charitable Distribution (IRC § 408(d)(8)) lets you send up to $111,000 per person directly from your IRA to a qualifying charity. The QCD counts toward your RMD but is excluded from gross income entirely — it never touches your MAGI. For a couple, that is $222,000 of potential RMD that does not inflate IRMAA.

The catch: you must be 70½ or older, and the distribution must go directly from the IRA custodian to the charity. You cannot take the cash and then donate it — that is a taxable distribution followed by a charitable deduction, which still inflates MAGI.

If you are already giving to charity, switching from writing a check to doing a QCD is free IRMAA savings. You lose the Schedule A itemized deduction, but many retirees are taking the standard deduction anyway ($31,500 MFJ, $15,750 single in 2026), so the itemized deduction was not helping.

Lever 2: tax-loss harvesting in taxable accounts

Capital gains are included in MAGI. If you have a taxable brokerage account with unrealized losses, harvesting them offsets gains dollar-for-dollar and reduces MAGI. Up to $3,000 of net losses offsets ordinary income. On a year when you are $5,000 over an IRMAA cliff, harvesting $5,000 in losses drops you back below.

The wash-sale rule (IRC § 1091) applies: you cannot repurchase substantially identical securities within 30 days. But you can swap into a similar-but-not-identical fund (e.g., sell a total-market fund and buy an S&P 500 fund) to stay invested while booking the loss.

Lever 3: income timing

If you have control over when you realize income — selling a rental property, exercising stock options, taking a lump-sum pension — shifting that event to a year when your MAGI is already above an IRMAA cliff (so you are paying the surcharge anyway) costs less than triggering a new cliff in a clean year. Bunching income into one high-IRMAA year and keeping the next year clean is a legitimate strategy.

Decision branch 4: you had a life-changing event — the SSA-44 appeal

If your income dropped because of a qualifying life-changing event, you can ask Social Security to use a more recent year’s income instead of the two-year-old return. The qualifying events are:

• Marriage, divorce, or death of a spouse
• Work stoppage or reduction (retirement, layoff)
• Loss of income-producing property (casualty, foreclosure)
• Loss of pension income
• Receipt of an employer settlement payment (severance that inflated one year)

File Form SSA-44 (Medicare Income-Related Monthly Adjustment Amount — Life-Changing Event) with supporting documentation. Social Security will re-determine your IRMAA based on the year you specify. This is not a loophole — it is the intended relief valve for people whose two-year-old return does not reflect current reality.

The most common use case: you retired in 2024 at a high salary, your 2024 MAGI was $250,000, and your 2025 income dropped to $60,000 (SS + small pension). Without the appeal, you pay 2026 IRMAA based on the $250,000 return. With the SSA-44 filing, you can ask Social Security to use your 2025 income — dropping you below the cliff entirely. Savings: up to $5,963/year (single) or $11,926/year (couple) at the higher tiers.

The scenario most planners miss: Social Security taxation stacking with IRMAA

Social Security benefits are taxable above $25,000 (single) or $32,000 (combined income, MFJ) — and up to 85% of benefits become taxable above $34,000 (single) or $44,000 (MFJ). These thresholds have not been inflation-adjusted since 1983. Nearly every retiree with a pre-tax IRA and Social Security is in the 85% zone.

Here is where it compounds: taxable Social Security is included in MAGI, which feeds IRMAA. A Roth conversion or large RMD does not just add its own amount to MAGI — it can also push more of your Social Security into the taxable bucket, which further inflates MAGI, which can tip you over an IRMAA cliff you thought you were safely below. The effective marginal tax rate in the SS-taxation phase-in zone can exceed 40% when you stack the federal bracket, the SS inclusion, and the IRMAA cliff together.

This is exactly why the gap-year Roth conversion strategy matters so much. Converting before Social Security starts (or before age 70 if you are delaying) lets you move money out of the Traditional IRA without triggering the SS-taxation multiplier. Once SS is flowing, every dollar of conversion pushes harder against both the tax bracket and the IRMAA cliff.

Putting it together: your decision path

Your next step depends on which branch above matched you:

1. Ages 60–63, pre-Medicare, pre-SS: This is your widest conversion window. Convert aggressively into the 12% and 22% brackets (MFJ taxable income up to $96,950 and $206,700). Keep total MAGI under $206,000 (MFJ) or $103,000 (single) so you do not set up an IRMAA hit the year you enroll in Medicare. Every dollar converted now is a dollar that will not show up as a forced RMD at 73+.
2. Ages 65–72, on Medicare, pre-RMD: Size conversions to the nearest IRMAA cliff. Cross a cliff only when the bracket arbitrage (current rate vs projected RMD-year rate) exceeds the surcharge cost by at least 10 percentage points. Keep a spreadsheet that projects your Traditional IRA balance at 73 and the resulting RMD — that is the income you are trying to shrink.
3. Ages 73+, RMDs active: Your primary levers are QCDs (up to $111,000/person), tax-loss harvesting in taxable accounts, and income-timing decisions. If you are charitably inclined, switching from cash donations to QCDs is the single highest-ROI move available — it satisfies the RMD, reduces MAGI, and costs you nothing incremental if you were going to give anyway.
4. Life-changing event (any age on Medicare): File Form SSA-44 immediately. Do not wait for the next determination cycle. Bring documentation of the income change. This is the fastest path to IRMAA relief when the two-year lookback produces a misleading picture.