IRMAA Brackets 2026: Understanding & Managing Medicare Surcharges

Bottom line: If your modified adjusted gross income (MAGI) in 2024 was above the first IRMAA threshold, you’ll pay a higher Medicare Part B and Part D premium in 2026 — potentially thousands more per year. IRMAA works as a cliff, meaning one extra dollar of income can push you into the next bracket and trigger the full surcharge for that tier. The good news: with two years between when income is earned and when surcharges hit, there’s real room for planning. Roth conversions, qualified charitable distributions, and income smoothing across years are the most reliable levers.

Key Takeaways

• IRMAA applies to Medicare Part B and Part D for higher-income beneficiaries, based on the MAGI from your tax return two years prior.
• Brackets are cliffs — exceeding a threshold by $1 triggers the full surcharge for that tier.
• 2026 IRMAA brackets are determined by your 2024 MAGI. If you had a one-time income spike (a property sale, a large Roth conversion), you may be paying for it now.
• The most effective planning levers — Roth conversions, QCDs, income smoothing — generally need to happen in the calendar year that will be measured, not the year you’re being charged.
• Qualifying life events (retirement, divorce, death of a spouse, loss of pension) can support an IRMAA appeal using Form SSA-44.

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What is IRMAA?

IRMAA is an extra premium added to your Medicare Part B and Part D coverage if your income is above set thresholds. It’s calculated from your MAGI two years before the year it applies.

The full name — Income-Related Monthly Adjustment Amount — explains the mechanic: Medicare adjusts your monthly premium upward when your reported income exceeds tier thresholds. It’s a tier-based surcharge, not a percentage of income, so the same surcharge applies whether you’re $1 or $30,000 over a threshold (until you cross into the next tier).

Quick definitions MAGI for IRMAA: Your adjusted gross income (AGI) plus tax-exempt interest income. This is a narrower definition than the MAGI used for ACA premium credits or Roth IRA limits. Cliff threshold: A threshold where exceeding it by any amount triggers the full additional cost — there is no phase-in. Two-year lookback: Your 2026 Medicare premiums are determined by the income reported on your 2024 tax return.

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What are the 2026 IRMAA brackets?

The 2026 IRMAA brackets apply to Medicare Part B and Part D and are based on your 2024 MAGI. Below the first threshold, you pay only the standard Part B premium and your regular Part D plan premium. Above it, surcharges kick in at five increasing tiers.

MAGI (Single)	MAGI (Married Filing Jointly)	Part B Premium (2026)	Part D Premium (2026)
Up to $109,000	Up to $218,000	$202.90	Plan premium
$109,001-$137,000	$218,001-$274,000	$284.10	Plan premium + $14.50
$137,001-$171,000	$274,001-$342,000	$405.80	Plan premium + $37.50
$171,001-$205,000	$342,001-$410,000	$527.50	Plan premium + $60.40
$205,001-$500,000	$410,001-$750,000	$649.20	Plan premium + $83.30
Above $500,001	Above $750,001	$689.90	Plan premium + $91.00

What if I’m married filing separately?

Married filing separately uses a much narrower IRMAA structure than single or MFJ. There are typically only two tiers — a base bracket up to a relatively low threshold, then a single high-income surcharge tier above it. Filing separately is rarely advantageous for IRMAA purposes.

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How is IRMAA calculated?

Social Security pulls your most recent tax return from the IRS, calculates your MAGI by adding tax-exempt interest to AGI, compares it to the IRMAA brackets for the applicable year, and assigns the corresponding surcharge to your monthly Part B and Part D premiums.

The full process:

1. The Social Security Administration (SSA) receives your tax data from the IRS.
2. Your MAGI is calculated as AGI + tax-exempt interest (Form 1040, line 11 + line 2a).
3. SSA compares your MAGI to the bracket thresholds in effect for the premium year (so 2024 MAGI → 2026 brackets).
4. If you exceed the base threshold, you’re assigned to the matching tier.
5. The surcharge is added to both your Part B premium (deducted from Social Security if you collect) and your Part D premium (collected separately by Medicare, regardless of which Part D plan you have).

Can you provide an IRMAA example?

Single filer, 2024 MAGI of $150,000.

This MAGI falls in the second IRMAA tier for 2026. Once verified, the calculation looks like:

• Base Part B premium: $202.90
• Part B IRMAA surcharge: $202.90
• Total Part B premium: $405.80 per month
• Part D plan premium + Part D IRMAA surcharge: $37.50

Annual additional cost from IRMAA: roughly $2,885. For a married couple with both spouses on Medicare, the surcharge applies to both premiums — effectively doubling the IRMAA cost at the same MAGI level.

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Why does IRMAA matter so much for retirees?

Because IRMAA is a cliff, a single planning misstep — a large Roth conversion, a property sale, an unexpectedly large RMD — can push a household into the next tier and lock in higher premiums for 12 months. And because the tax year is two years removed from the premium year, the consequences arrive after most people have forgotten what triggered them.

Three features make IRMAA particularly disruptive in retirement:

• The cliff structure. Going $1 over a threshold costs the same as going $10,000 over.
• The two-year delay. Households often don’t connect a 2024 income event to a 2026 premium increase, which makes it feel arbitrary.
• The combined household effect. When both spouses are on Medicare, the surcharge hits twice. A single household income event can trigger two surcharges.

How does IRMAA impact federal employees?

In the DMV region, many of our clients are federal retirees with CSRS or FERS pensions plus large TSP balances. Once required minimum distributions start (currently age 73), the combination of pension income, Social Security, and TSP RMDs can push household MAGI well into IRMAA territory — sometimes for the first time. Planning the years between retirement and RMD age is often where IRMAA strategy lives or dies.

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What is the hold harmless provision, and does it apply to me?

The hold harmless provision protects most Social Security recipients from a Part B premium increase that would reduce their net Social Security check. It does not apply to anyone paying IRMAA. If you’re subject to IRMAA, you absorb both the standard premium increase and the surcharge in full.

This is one reason IRMAA can feel especially sharp: while most Medicare beneficiaries are partially shielded from year-over-year premium volatility, IRMAA-payers are not.

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How do I avoid or reduce IRMAA?

Reducing IRMAA almost always means managing the MAGI of the year being measured — so 2026 IRMAA is shaped by 2024 income choices. The most reliable strategies are Roth conversions in low-income windows, qualified charitable distributions to satisfy RMDs, and spreading large income events across multiple years.

How can strategic Roth conversions help with IRMAA?

Roth conversions in your 60s — between retirement and the start of Social Security and RMDs — can reduce future RMDs and the IRMAA exposure they create. The trade-off: a conversion adds to MAGI in the conversion year, so converting too aggressively can trigger IRMAA two years later. The sweet spot is converting up to (not over) the next IRMAA threshold.

How can Qualified Charitable Distributions (QCDs) help with IRMAA?

If you’re 70½ or older with charitable intent, a QCD lets you send up to a set annual limit directly from an IRA to a qualified charity. The amount counts toward your RMD but is excluded from AGI — and therefore from MAGI. For retirees who give meaningfully each year, QCDs are often the single most efficient IRMAA-management tool. In 2026, the QCD maximum amount is $111,000.

How can I smooth large income events to avoid IRMAA?

A property sale, a deferred compensation payout, or a year of high capital gains can push you into a surcharge tier. Where possible, consider:

• Spreading installment sales over multiple tax years
• Realizing capital gains in non-RMD years
• Coordinating spouse retirement timing to avoid stacking final-year wages onto pension and SS income

How can tax-efficient investments help reduce IRMAA?

In taxable accounts, ETFs and tax-managed funds typically produce smaller annual capital gain distributions than actively managed mutual funds. Tax-loss harvesting can offset realized gains and trim AGI in any given year.

How does coordinating Social Security claiming affect IRMAA?

Delayed Social Security claims can compress income early in retirement and create a wider Roth conversion window before benefits and RMDs begin.

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Can I appeal an IRMAA surcharge?

Yes — if you’ve experienced a qualifying life-changing event that reduced your income. You file Form SSA-44 with documentation, and Social Security can adjust your IRMAA tier (sometimes retroactively).

The eight events SSA recognizes:

1. Marriage
2. Divorce or annulment
3. Death of a spouse
4. Work stoppage (retirement) or reduction in work hours
5. Loss of income-producing property (such as a destroyed rental)
6. Loss of pension income
7. Employer settlement payment
8. Scheduled cessation, termination, or reorganization of an employer’s pension plan

How do I file an IRMAA appeal?

1. Complete Form SSA-44 (Medicare IRMAA Life-Changing Event)
2. Gather supporting documentation — a tax return, pension statement, death certificate, or letter confirming retirement
3. Submit by mail or in person to your local Social Security office
4. For assistance, call 1-800-772-1213 (TTY: 1-800-325-0778)

Appeals typically take a few months to process. If approved, the adjustment can apply retroactively to the start of the affected premium year.

An important caveat: Investment income changes, large IRA distributions, and Roth conversions are not qualifying events. SSA-44 covers life events, not market events or planning decisions.

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Common mistakes that trigger IRMAA

• Bunching a large Roth conversion into a single year without modeling the IRMAA impact two years out
• Selling appreciated property without considering the year’s resulting MAGI
• Forgetting that both spouses’ premiums are affected by the household MAGI when both are on Medicare
• Filing married filing separately in the assumption that it lowers IRMAA — for most households, MFS uses much tighter IRMAA brackets and costs more
• Ignoring the QCD opportunity once RMDs begin
• Reacting to an IRMAA notice instead of preventing it — by the time you receive the notice, the income year is closed

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What does effective IRMAA management look like?

At RCS Financial Planning, IRMAA planning is built into the broader retirement income process rather than treated as a standalone exercise. Our approach typically includes:

• Multi-year MAGI projections showing the range of expected income through age 95, with IRMAA threshold lines overlaid
• Roth conversion modeling that respects both federal tax brackets and IRMAA cliffs
• RMD planning that incorporates QCDs where charitable intent exists
• Coordinated claiming and withdrawal sequencing so that the years before RMDs are used productively

The goal isn’t to eliminate IRMAA — for higher-income retirees, that’s not always realistic — but to avoid paying for unnecessary cliff crossings and to compress income into the most tax-efficient years available.

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What should you do next?

If you’re within five years of Medicare eligibility or already enrolled, three steps will sharpen your thinking:

1. Pull your last filed tax return and calculate your MAGI (AGI + tax-exempt interest). Compare it to the 2026 brackets above.
2. Project the next 5–10 years of MAGI, including planned Roth conversions, expected RMDs, and Social Security. Look for years where you cross a tier.
3. Identify your planning windows — typically the years between retirement and RMDs — when MAGI is most controllable.

If you’d like a coordinated look at IRMAA, Roth conversions, and Social Security timing together, RCS Financial Planning works with retirees and near-retirees across Maryland and the broader DMV region — including federal employees navigating CSRS/FERS pensions and TSP RMDs. Schedule a no-obligation conversation to see where IRMAA planning fits in your retirement picture.