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Medicare IRMAA 2026: Brackets, Surcharges & What to Do

Senior man reviewing Medicare IRMAA documents

TL;DR:

  • The 2026 Medicare Part B premium is $202.90 per month, with additional IRMAA surcharges for high-income beneficiaries based on 2024 MAGI. Beneficiaries can appeal these surcharges by submitting Form SSA-44 after qualifying life events to reduce future premiums. Accurate income tracking and timely actions can help retirees avoid unexpected premium increases due to income changes or year-end planning.

The 2026 standard Medicare Part B premium is $202.90 per month, but if your 2024 modified adjusted gross income (MAGI) exceeded the official thresholds for single or joint filers, you owe more. That extra charge is IRMAA, the Income-Related Monthly Adjustment Amount, and it can add a range of additional surcharges to your Part B premium. Part D carries its own surcharge on top of that, varying by income tier.

Here is what to do right now:

  • Check your 2024 tax return. Pull Form 1040, line 11 (AGI) and add line 2a (tax-exempt interest). That sum is your MAGI for 2026 IRMAA purposes.
  • Compare that number to the bracket table below. If you land above $109,000 (single) or $218,000 (joint), you are in a surcharge tier.
  • Had a qualifying life event since 2024? Retirement, divorce, death of a spouse, or loss of income-producing property may let you request a lower determination. File Form SSA-44 with your local Social Security Administration office.

Table of Contents

What is IRMAA and who actually pays it?

IRMAA is the income-related monthly adjustment that the Social Security Administration adds to your Part B and Part D premiums when your MAGI crosses a set threshold. It is not a penalty. It is a premium-scaling mechanism built into the Medicare Modernization Act, designed so higher-income beneficiaries contribute more toward the true cost of their coverage.

The mechanics hinge on a structural timing problem. When the SSA sets your 2026 premiums, your 2026 income does not exist yet. The most recent finalized IRS data available is typically your 2024 tax return, which is why the SSA uses income from two years prior to determine your current-year surcharge. That two-year gap is not an oversight; it is the only practical way to use verified tax data.

The two-year lookback is structural. SSA must rely on the most recent finalized IRS data when setting premiums. Income changes only affect your IRMAA after a lag, which means a high-income year in 2024 shows up as a higher premium in 2026, even if your income dropped sharply in 2025.

According to CMS, a minority of people with Medicare Part D pay IRMAA surcharges. That sounds like a small slice, but for those who do pay, the annual cost can run into thousands of dollars. The timeline runs like this: you file your 2024 taxes in early 2025, the IRS transmits that data to the SSA, and the SSA uses it to set your 2026 premium tier.

2026 IRMAA brackets: what do you actually owe?

The table below shows the official 2026 IRMAA tiers from the SSA POMS sliding-scale tables, organized by 2024 MAGI and filing status. The Part B column shows your total monthly Part B premium (base $202.90 plus the surcharge). The Part D column is the surcharge added on top of whatever your specific plan charges.

2026 IRMAA brackets by filing status

2024 MAGI: Single / Head of Household 2024 MAGI: Married Filing Jointly 2024 MAGI: Married Filing Separately Monthly Part B Premium Part D Surcharge (added to plan premium) annual Part B and Part D income-related adjustment costs vary by income tier
$103,000 or less $218,000 or less $103,000 or less $202.90 (no surcharge) — —
More than $103,000 up to $129,000 More than $218,000 up to $276,000 N/A $284.10 $14.50 $1,166
More than $129,000 up to $161,000 More than $276,000 up to $329,000 N/A $405.80 $37.60 $3,621
More than $161,000 up to $194,000 More than $329,000 up to $410,000 N/A $527.50 $60.00 $6,275
More than $194,000 up to $500,000 More than $410,000 up to $750,000 More than $109,000 up to $174,000 $649.20 $84.00 $8,772
More than $500,000 More than $750,000 More than $174,000 $689.90 $91.00 $9,432

Infographic showing 2026 IRMAA income brackets tiers

Source: SSA POMS HI 01101.020 and CMS 2026 Premiums Fact Sheet. The “Annual Extra Cost” column reflects the surcharge above the base $202.90 Part B premium plus the Part D surcharge, multiplied by 12.

A note on married filing separately: The SSA applies a compressed bracket structure to this filing status. A single dollar above $103,000 MAGI jumps you straight to the second-highest tier, skipping the middle brackets entirely. If you file separately, this is a significant planning consideration.

How IRMAA is collected: If you receive Social Security benefits, the SSA deducts your total Part B premium (including any surcharge) directly from your monthly benefit check. If you are not yet drawing Social Security, you will receive a bill from Medicare. Part D IRMAA is collected separately by the SSA, not by your Part D plan.

Statistic to know: The 2026 Part D national base premium is the official amount published by Medicare.gov. Your actual Part D plan premium may differ, but the IRMAA surcharge is added on top of whatever your plan charges.

Annotated example for Tier 2 (mid-range): A single filer with 2024 MAGI of $140,000 falls in the $129,000–$161,000 bracket. Their monthly Part B premium is $405.80, plus a $37.60 Part D surcharge, for a combined monthly IRMAA-related Medicare cost of $443.40. Annualized, that is $5,320.80 before any Part D plan premium. Compare that to a beneficiary below the threshold paying $202.90 per month ($2,434.80 annually) and the difference is $2,885.40 per year.

How does the SSA calculate your IRMAA?

The calculation starts with a specific definition of income. The SSA defines MAGI for IRMAA as your adjusted gross income (Form 1040, line 11) plus any tax-exempt interest income (Form 1040, line 2a). That second piece catches a lot of people off guard.

What counts toward MAGI:

  • Wages, salaries, and self-employment income
  • Taxable Social Security benefits
  • Pension and retirement account distributions (401(k), traditional IRA)
  • Capital gains, including gains from selling a home above the exclusion
  • Dividends and interest income
  • Roth conversion amounts (the converted sum is treated as ordinary income)
  • Tax-exempt interest, including municipal bond interest

That last item is the most common blind spot. Municipal bonds are marketed as “tax-free,” and they are for federal income tax purposes. But the SSA adds that interest back into your MAGI when calculating IRMAA. A retiree holding a substantial muni bond portfolio can find themselves in a higher bracket without realizing their “tax-free” income triggered the surcharge.

The two-year lookback in practice: For 2026 IRMAA, the SSA uses your 2024 tax return. If the IRS has not yet transmitted your 2024 return (for example, you filed an extension), the SSA falls back to your 2023 return. Once your 2024 data arrives, the SSA can issue a revised determination.

Short calculation example: Suppose your 2024 AGI was $105,000 and you received $6,000 in municipal bond interest. Your MAGI is $111,000, which clears the $109,000 single-filer threshold and places you in Tier 1. Without the muni interest, you would owe no surcharge at all.

Hands calculating IRMAA using tax documents and calculator

Pro Tip: Before December 31 of any tax year, run a quick MAGI estimate. If you are close to a threshold, consider whether a Roth conversion, a bond sale, or a required minimum distribution will push you over. A one-dollar overage triggers the full tier surcharge, not a proportional one.

What income events commonly trigger IRMAA?

Most IRMAA surprises trace back to a handful of income events that beneficiaries did not anticipate would affect their Medicare premiums two years later.

Common triggers:

  • Large Roth IRA conversions (the converted amount counts as ordinary income)
  • Sale of a business, rental property, or investment with significant capital gain
  • Required minimum distributions from traditional IRAs or 401(k)s
  • Severance pay or deferred compensation received in a single year
  • Increased municipal bond or dividend income from a growing portfolio
  • Inheritance of a traditional IRA (distributions count as income)

Qualifying life-changing events that allow an SSA-44 appeal:

  • Marriage or divorce
  • Death of a spouse
  • Work stoppage or reduction in work hours
  • Loss of income-producing property (due to a disaster or other involuntary event)
  • Loss of pension income
  • Employer settlement payment (in lieu of pension)

What does NOT qualify: A one-time capital gain from selling a business or investment property is generally not a qualifying life-changing event under SSA rules. Neither is a Roth conversion. These income spikes can push you into a higher IRMAA tier for the full premium year, and you typically must wait for the two-year lookback to roll forward before your premiums reflect the lower income.

Documentation to gather before filing SSA-44:

  • Your most recent federal tax return (or an amended return if applicable)
  • Proof of the qualifying event (marriage certificate, divorce decree, death certificate, termination letter, or retirement letter)
  • Pay stubs or a letter from your employer confirming reduced hours or work stoppage
  • Documentation of any lost pension or property income

SSA does not automatically adjust IRMAA after life changes. You must recognize the qualifying event and initiate the appeal yourself. Many beneficiaries never do, and they keep paying the higher surcharge for months or years.

How do you appeal your IRMAA with Form SSA-44?

The appeal process is more straightforward than most beneficiaries expect. The key is acting quickly after the qualifying event, because any approved adjustment is prospective, not retroactive.

Step 1: Identify the tax year SSA used. Your IRMAA notice from the SSA will state which tax year it relied on. For 2026, that is almost always your 2024 return. Confirm this before completing the form, because you will need to report MAGI for a more recent year on SSA-44.

Woman submitting SSA-44 appeal form at Social Security office

Step 2: Complete Form SSA-44. Download Form SSA-44 from SSA.gov. The form asks you to identify the qualifying life-changing event, the year it occurred, and your estimated or actual MAGI for a more recent tax year. Attach all supporting documentation (see the list in the previous section). Be specific: vague descriptions of income changes without documentation will slow or deny the request.

Step 3: Submit to your local SSA office. You can mail the completed form and documents to your local SSA office or deliver them in person. In-person submission often speeds processing because a representative can confirm the documents are complete before you leave. To find your nearest office, visit SSA.gov or call 1-800-772-1213.

Step 4: Understand what happens next. The SSA will review your request and issue a new determination. Processing times vary, but plan for several weeks. If approved, the lower premium takes effect going forward from the month of approval. The SSA does not issue refunds for months you already paid at the higher rate before the appeal was approved. If your request is denied, you have the right to request a hearing before an Administrative Law Judge.

Step 5: Get local help if needed. The State Health Insurance Assistance Program (SHIP) offers free, unbiased Medicare counseling in every state. Oregon’s SHIP program is called SHIBA (Senior Health Insurance Benefits Assistance). You can also contact Mountaintop Insurance’s enrollment assistance team for help organizing your SSA-44 documentation and understanding your options.

Practical strategies to reduce future IRMAA exposure

IRMAA planning is really income planning with a two-year delay built in. The strategies below are worth discussing with a CPA or certified financial planner before acting.

Income timing and spreading:

  • Where possible, spread large income events across multiple tax years rather than concentrating them in one. A $200,000 Roth conversion in a single year may push you two tiers higher; splitting it over two or three years can keep you in a lower bracket each year.
  • Coordinate the timing of large asset sales with years when your other income is lower, such as the gap between retirement and Social Security claiming.

Roth conversion planning:

  • Roth conversions are one of the most powerful long-term tax tools for retirees, but the converted amount counts as ordinary income in the year of conversion. Run a MAGI projection before converting to see which IRMAA tier you land in.
  • The long-term benefit of tax-free Roth growth often outweighs a year or two of higher IRMAA, but the math depends on your bracket, timeline, and estate goals. Do not skip the conversion out of IRMAA fear; just time it deliberately.

Tax-exempt interest management:

  • Review your municipal bond holdings annually. If muni interest is pushing you over an IRMAA threshold, consider whether the after-tax yield advantage still holds once the IRMAA surcharge is factored in.
  • Some retirees find that shifting a portion of muni holdings into tax-deferred instruments reduces MAGI without meaningfully changing after-tax income.

SSA-44 timing:

  • File Form SSA-44 as soon as possible after a qualifying life event. Every month of delay is a month you pay the higher premium with no refund available.
  • If you retired mid-year, your income for the partial year may qualify you for a new determination even if your prior full-year income was above the threshold.

Pro Tip: If you are approaching Medicare eligibility and still working, check whether your final working year will create a two-year IRMAA spike. Retiring in December versus January can shift a full year of wages in or out of the lookback window.

Worked examples: computing your 2026 Medicare cost with IRMAA

These three examples use the official 2026 figures from CMS and SSA POMS. Part D plan premiums vary by plan; the examples use the $38.99 national base premium as a proxy.

Example Filer Status 2024 MAGI Part B Premium Part D Surcharge Part D Plan Premium Monthly Total Annual Total
1: Below threshold Single $109,000 $202.90 — $38.99 — —
2: Mid-tier IRMAA Single $140,000 $405.80 $37.60 $38.99 — $5,788.68
3: Married couple, both in Tier 1 Joint (each) $230,000 joint $284.10 each $14.50 each $38.99 each $337.59 each $4,051.08 each

Example 3 household total: $337.59 × 2 = $675.18 per month, or $8,102.16 per year. IRMAA is assessed per person, so a married couple where both spouses are on Medicare each pay the surcharge based on their joint MAGI. That doubles the household cost compared to a single filer at the same tier.

How to run your own calculation:

  1. Find your 2024 Form 1040: add line 11 (AGI) and line 2a (tax-exempt interest) to get your MAGI.
  2. Match that MAGI to the bracket table above using your filing status.
  3. Note the Part B premium for your tier.
  4. Add your actual Part D plan premium plus the Part D surcharge for your tier.
  5. Multiply the monthly total by 12 for your annual Medicare premium cost.

For Part D plan details and help comparing plans available in Central Oregon, Mountaintop Insurance can walk you through the options at no cost.

Key Takeaways

The 2026 IRMAA surcharges are based on your 2024 MAGI, and a single dollar over a threshold triggers the full tier surcharge, so knowing your number before year-end is the single most effective way to avoid an unwelcome premium surprise.

Point Details
2026 Part B base premium The standard monthly premium is $202.90; IRMAA surcharges stack on top, ranging from $81.20 to $487.00 per month.
MAGI thresholds that trigger IRMAA Single filers above $103,000 and joint filers above $206,000 enter the first surcharge tier for 2026.
Two-year lookback and blind spots SSA uses your 2024 MAGI, including tax-exempt interest; municipal bond income is a common unplanned trigger.
Appeal with Form SSA-44 File promptly after a qualifying life event; approved adjustments are prospective only, with no refunds for prior months.
Local help available Mountaintop Insurance offers free Medicare consultations in Central Oregon, including help with SSA-44 documentation.

Why early IRMAA planning matters more than most beneficiaries realize

The conventional wisdom on IRMAA is that it is a problem for wealthy retirees. That framing misses a large group of people who get caught: middle-income retirees who had one unusually good income year, converted a traditional IRA to a Roth, sold a rental property, or simply held municipal bonds without realizing those counted toward MAGI.

What strikes me most, working through these numbers with beneficiaries, is how often the surprise is entirely avoidable. The two-year lookback is not a trap; it is a predictable system. If you know your 2024 income is high, you can prepare for the 2026 surcharge, budget for it, and in some cases file SSA-44 to reduce it. The beneficiaries who get hurt are the ones who find out in November when their Social Security check is smaller than expected.

The other underappreciated issue is the cliff structure. IRMAA does not phase in gradually. Cross a threshold by one dollar and you owe the full tier surcharge for the entire year. That asymmetry makes year-end income management genuinely worth the effort, especially for retirees who have some control over the timing of Roth conversions or capital gains. A conversation with a CPA in October or November, before the tax year closes, is worth far more than a Form SSA-44 filed in January.

Mountaintop Insurance can help you sort through IRMAA questions

Sorting out IRMAA surcharges, understanding which tax year applies, and deciding whether to file Form SSA-44 is exactly the kind of work that benefits from a local, unhurried conversation rather than a national call center. Mountaintop Insurance, based in Bend, Oregon, offers free Medicare consultations for Central Oregon residents, covering IRMAA review, Medicare enrollment assistance, and help organizing SSA-44 documentation for qualifying life events.

The agency is commission-based, meaning consultations cost you nothing. Mountaintop Insurance is paid by carriers when you enroll in a plan, so there is no fee and no pressure. If you want to review your 2024 MAGI, check which bracket you are in, or understand your appeal options before your next premium notice arrives, schedule a free consultation with Mountaintop Insurance today.

Official sources to verify the 2026 numbers yourself

All figures in this article come from the following primary sources. If you want to confirm a number or check for updates after publication, these are the right places to look.

For rate-setting questions, CMS is the authoritative source. For appeals and IRMAA determinations, contact the SSA directly at 1-800-772-1213 or visit SSA.gov to find your local office.

FAQ

What are the 2026 IRMAA income thresholds for single filers?

Single filers with 2024 MAGI above $103,000 enter the first IRMAA surcharge tier for 2026, per the SSA POMS sliding-scale tables. The highest tier applies to MAGI above $500,000.

What is the standard Medicare Part B premium for 2026?

The standard monthly Part B premium for 2026 is $202.90, as announced by CMS. Beneficiaries subject to IRMAA pay more, with total Part B premiums ranging from $284.10 to $689.90 depending on income tier.

What will Medicare Part D cost in 2026 with IRMAA?

The 2026 Part D national base premium is the official amount published by Medicare.gov, and IRMAA surcharges of $14.50 to $91.00 per month are added on top of your plan’s actual premium if your MAGI exceeds the applicable threshold.

What does Medicare not cover in 2026?

Medicare generally does not cover long-term custodial care, most dental services, routine vision exams and eyeglasses, hearing aids, or cosmetic procedures. These gaps are why many beneficiaries add a Medigap or supplemental plan.

How do I appeal my 2026 IRMAA determination?

File Form SSA-44 with your local SSA office as soon as possible after a qualifying life-changing event such as retirement, divorce, or death of a spouse. Approved adjustments apply prospectively; SSA does not refund premiums already paid at the higher rate.

Disclaimer: This article is for general educational purposes only and does not constitute personalized advice. Medicare rules and plan details change frequently.

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