Medicare IRMAA, formally known as the Income-Related Monthly Adjustment Amount, is a mandatory surcharge added to your Medicare Part B and Part D premiums when your income exceeds certain thresholds. For 2026, IRMAA applies to individuals with modified adjusted gross income above $109,000 (single filers) or $218,000 (joint filers), based on your 2024 tax return. The standard Part B premium is $202.90 per month. If IRMAA applies to you, that number climbs significantly. Understanding how this surcharge works is the first step toward managing your Medicare costs with confidence.
What is Medicare IRMAA and how does it work in 2026?
IRMAA is a sliding-scale surcharge that adds to your base Medicare premium based on how much income you reported two years ago. The Social Security Administration (SSA) reviews your IRS tax data each fall and sets your IRMAA tier for the following year. You do not apply for IRMAA. The SSA assigns it automatically and notifies you by mail.
The surcharge applies separately to Part B (medical coverage) and Part D (prescription drug coverage). Both are affected by the same income brackets, but the dollar amounts differ. Most people never pay IRMAA because most Medicare enrollees fall below the income thresholds.
The 2026 IRMAA income brackets and premium tiers
IRMAA uses six tiers, ranging from a 35% to 85% surcharge on top of the standard Part B cost. At the highest income tier, the total Part B premium reaches $689.90 per month. The table below shows each tier for 2026.
| Individual MAGI | Joint MAGI | Part B Monthly Premium | Part D Monthly Surcharge |
|---|---|---|---|
| Up to $109,000 | Up to $218,000 | $202.90 (standard) | $0 |
| $109,001–$136,000 | $218,001–$272,000 | $244.60 | $13.70 |
| $136,001–$163,000 | $272,001–$326,000 | $349.40 | $35.30 |
| $163,001–$196,000 | $326,001–$392,000 | $454.20 | $57.00 |
| $196,001–$499,999 | $392,001–$749,999 | $559.00 | $78.60 |
| $500,000 and above | $750,000 and above | $689.90 | $91.00 |
One detail that catches many people off guard: crossing a threshold by even $1 pushes you into the full surcharge for that tier. There is no gradual increase within a bracket. A $1 income difference can cost you hundreds of dollars per year in additional premiums.
Pro Tip: If your income is close to a threshold, review your MAGI carefully before year-end. A small Roth conversion or capital gain could push you into the next tier.
Why is IRMAA based on income from two years ago?
IRMAA uses a two-year lookback because the IRS does not finalize tax return data until well after the filing deadline. Your 2026 IRMAA is based on your 2024 tax return. The SSA cannot use real-time income data, so it relies on the most recent finalized IRS records available each fall.
MAGI for IRMAA purposes includes your adjusted gross income plus any tax-exempt interest income. That second component surprises many people. Municipal bond interest, for example, does not appear in your taxable income but does count toward your IRMAA calculation. Many beneficiaries overlook this and end up with a higher IRMAA tier than expected.
Here is what counts toward your MAGI for IRMAA:
- Wages, salaries, and self-employment income
- Taxable Social Security benefits
- Pension and retirement account distributions (including traditional IRA and 401(k) withdrawals)
- Capital gains from investments or property sales
- Tax-exempt interest income (such as municipal bond interest)
- Rental income and business income
The two-year lag also means that income changes you make today will not affect your IRMAA for two years. If you retire this year and your income drops sharply, your 2026 IRMAA is still based on your 2024 earnings. That gap is exactly why the SSA offers an appeal process for qualifying life events.
IRMAA is reassessed every fall based on the prior two years of MAGI. That means your surcharge can go up, go down, or disappear entirely from one year to the next depending on your income history.
What can you do if your income has changed or IRMAA is wrong?
The SSA allows you to appeal an IRMAA determination when your income has dropped due to a qualifying life-changing event. Form SSA-44 is the official document for requesting a reduction based on current income rather than two-year-old data.
The SSA recognizes these qualifying life-changing events:
- Retirement or reduction in work hours (most common reason for appeal)
- Death of a spouse
- Divorce or annulment
- Marriage (if it changes your filing status and income)
- Loss of income-producing property (due to disaster or other involuntary event)
- Loss of pension income (employer plan termination or similar)
- Receipt of a settlement from an employer (due to closure or bankruptcy)
To file an appeal, submit Form SSA-44 to your local SSA office along with documentation of the qualifying event and evidence of your current or expected income. Acceptable documents include a letter of retirement, a death certificate, or a divorce decree. The SSA will use your more recent income estimate to recalculate your IRMAA tier.
One important limitation: selling your primary home is not a qualifying life-changing event. A home sale that generates a large capital gain can trigger IRMAA, but the SSA will not accept it as grounds for an appeal reduction. That capital gain counts in your MAGI for that tax year, and you will pay the surcharge for the following two years.
IRMAA surcharges are automatically deducted from your Social Security benefit check. If your Social Security payment is not large enough to cover the full surcharge, Medicare bills you directly for the remaining balance. Missing that bill can create coverage complications, so watch for it.
Pro Tip: Act quickly after a qualifying life event. The sooner you file Form SSA-44, the sooner your corrected premium takes effect. Delays mean you keep paying the higher surcharge.
Practical ways to manage your Medicare costs and IRMAA exposure
IRMAA is not permanent. It is reassessed every year, and a drop in income can eliminate the surcharge entirely the following cycle. That is good news for people who experienced a one-time income spike, such as a large IRA withdrawal or a business sale.
The most common triggers for unexpected IRMAA surcharges include:
- Large IRA or 401(k) withdrawals taken in a single year
- Capital gains from selling investments or a second property
- Required Minimum Distributions (RMDs) that push income over a threshold
- Roth conversions that temporarily inflate MAGI
- Inheritance or settlement income reported in a single tax year
Large one-time income events like significant IRA withdrawals can trigger IRMAA surcharges for two full years, even if your income returns to normal immediately after. Planning the timing of these events carefully can save you thousands of dollars in premiums.
Medicare supplement plans, also called Medigap plans, do not eliminate IRMAA. However, they do reduce your overall out-of-pocket exposure by covering costs that original Medicare leaves unpaid. When your Part B premium rises due to IRMAA, a Medicare supplement plan can offset the financial pressure by limiting what you pay for hospital stays, doctor visits, and other covered services.
Pro Tip: Review your income sources each october before the SSA sets next year’s IRMAA. If you can shift income or delay a withdrawal by a few weeks, you may land in a lower tier.
Key Takeaways
IRMAA is a mandatory, income-based surcharge on Medicare Part B and Part D premiums, reassessed annually using your MAGI from two years prior, and it can be appealed with Form SSA-44 when a qualifying life event reduces your income.
| Point | Details |
|---|---|
| IRMAA income thresholds | Surcharges begin at $109,000 (single) or $218,000 (joint) MAGI for 2026. |
| Two-year lookback rule | Your 2026 IRMAA is based on your 2024 tax return, not your current income. |
| MAGI includes tax-exempt interest | Municipal bond interest counts toward MAGI even though it is not taxable income. |
| Appeal with Form SSA-44 | Qualifying life events like retirement allow you to request a lower IRMAA tier. |
| IRMAA is not permanent | Annual reassessment means surcharges can decrease or disappear as income changes. |
What I’ve learned after nearly two decades of Medicare planning
I have been helping Medicare consumers since 2007, and IRMAA is one of the most misunderstood parts of the entire Medicare system. People are shocked when they open an SSA notice and see their Part B premium is $400 or $500 instead of the standard rate. The confusion is real, and it is completely understandable.
The biggest mistake I see is people assuming IRMAA is permanent or that they have no recourse. That is wrong. If your income dropped because you retired, lost a spouse, or went through a divorce, you have the right to appeal. File Form SSA-44, gather your documentation, and submit it promptly. I have seen clients reduce their premiums significantly within a single billing cycle by acting fast.
The second mistake is ignoring MAGI components like tax-exempt interest. People assume that if income is not taxable, it does not count. For IRMAA, it does. A financial advisor who understands Medicare can help you model your MAGI before you make large withdrawals or conversions.
IRMAA is manageable. You just need to know the rules, watch your income timing, and respond quickly when the SSA sends a notice. At Paulbinsurance, we walk clients through exactly this kind of planning every day. Knowledge is the only tool that actually moves the needle here.
— Paul
Medicare supplement plans can help offset higher premiums
Higher Medicare premiums from IRMAA create real budget pressure, especially for people on fixed incomes. A Medicare supplement plan will not reduce your IRMAA surcharge, but it can significantly limit what you pay out of pocket for the care you actually receive.
At Paulbinsurance, we specialize in helping Medicare enrollees find supplement coverage that fits their budget and health needs. Whether you are newly enrolled or reassessing your current plan, our independent agents compare options across multiple carriers with no pressure and no bias. Learn more about Medicare supplement options that can help you manage your total Medicare costs, or explore our guide to understanding supplement costs to see what coverage actually looks like in practice. Call us or visit Paulbinsurance.com to get started with a free consultation.
FAQ
What is the Medicare IRMAA income limit for 2026?
IRMAA applies to individuals with MAGI above $109,000 (single) or $218,000 (joint) for 2026, based on 2024 tax returns. Income at or below these thresholds means you pay only the standard Part B premium of $202.90.
How do I know if I owe IRMAA?
The SSA sends a written notice called an IRMAA determination letter if your income triggers a surcharge. You do not need to calculate it yourself. The SSA pulls your data directly from the IRS.
Can IRMAA be reduced or removed?
Yes. IRMAA is reassessed every year and can decrease or disappear if your income drops. You can also appeal using Form SSA-44 if a qualifying life event reduced your income since the tax year the SSA used.
Does IRMAA apply to Medicare Advantage plans?
IRMAA applies to the underlying Part B and Part D premiums, not to the Medicare Advantage plan premium itself. If you are enrolled in a Medicare Advantage plan, you still pay Part B and may still owe IRMAA on that premium.
What income counts toward IRMAA?
MAGI for IRMAA includes adjusted gross income plus tax-exempt interest income. This covers wages, retirement distributions, capital gains, Social Security benefits, and municipal bond interest, among other sources.
