Medicare Part B IRMAA is an extra monthly charge added to your standard Medicare Part B premium when your income exceeds certain thresholds. IRMAA stands for Income-Related Monthly Adjustment Amount. The Social Security Administration (SSA) determines your surcharge based on the tax return you filed two years ago. Only about 8% of Medicare beneficiaries pay this surcharge, but those who do can spend thousands of extra dollars each year on premiums alone.
Under 42 U.S.C. § 1395r, Medicare is required to charge higher-income beneficiaries more for Part B coverage. This federal statute creates a tiered system where going even $1 over a threshold triggers the full surcharge for that bracket. The result is a “cliff” penalty that catches many retirees off guard — especially when the income that triggers it was earned two full years earlier.
A married couple in the highest IRMAA bracket can pay over $16,500 per year in combined Part B and Part D premiums. That’s real money that could go toward housing, travel, or family.
Here’s what you’ll learn in this article:
- 💰 How IRMAA is calculated and why Medicare uses income from two years ago to set your premium
- 📊 The exact 2025 and 2026 IRMAA income brackets and what you’ll pay at each level
- 🛡️ Proven strategies to reduce your income and avoid triggering the surcharge
- 📝 How to appeal IRMAA using Form SSA-44 if a life-changing event lowered your income
- ⚠️ Common mistakes that push retirees into higher IRMAA brackets — and how to avoid them
How Medicare Part B IRMAA Works Behind the Scenes
IRMAA is not a penalty. It is a pricing structure written into federal law that ties your Medicare Part B premium to your income level. Every Medicare beneficiary pays the standard Part B premium — $202.90 per month in 2026. If your income is above certain thresholds, the SSA adds a surcharge on top of that base premium.
The SSA does not use your current income to calculate IRMAA. It uses your Modified Adjusted Gross Income (MAGI) from the federal tax return you filed two years prior. Your 2026 IRMAA is based on your 2024 tax return. Your 2025 IRMAA was based on your 2023 tax return.
This two-year lookback exists because of timing. Medicare premiums for the following year are set in the fourth quarter. The most recent complete tax data the IRS can send to the SSA at that point is from two years earlier. By the time you receive the surcharge notice, the income that triggered it is already locked in.
Why the Two-Year Lookback Creates Problems
The two-year lag creates a painful mismatch for retirees. Someone who earned $180,000 in their last year of work but now lives on $50,000 in retirement income will still pay IRMAA based on that old salary. This mismatch can last until the lower-income tax return catches up in the system.
Imagine you retired in January 2025. Your 2026 Medicare premiums are still based on your 2024 income — your last full year of high earnings. You could pay hundreds of extra dollars each month for coverage that your neighbor gets at the base rate. This is one of the top reasons people file IRMAA appeals.
What Counts as Income for IRMAA
Your MAGI for IRMAA purposes is not the same as your take-home pay. The SSA calculates it by taking your Adjusted Gross Income (AGI) from IRS Form 1040, Line 11, and adding back tax-exempt interest income from Form 1040, Line 2a.
The types of income that increase your MAGI include:
- Wages and salaries
- Taxable Social Security benefits
- Traditional IRA, 401(k), and 403(b) distributions
- Roth conversion amounts
- Capital gains from selling stocks, property, or businesses
- Pension and annuity income
- Rental income
- Tax-exempt interest (like municipal bond interest)
Many retirees don’t realize that municipal bond interest gets added back into MAGI for IRMAA purposes. This “add-back” is what often pushes retirees over a threshold they thought they were safely below. Qualified Roth IRA withdrawals and HSA distributions for medical expenses do not count toward MAGI.
2026 IRMAA Brackets: What You’ll Pay at Every Income Level
The 2026 IRMAA income brackets use your 2024 MAGI to determine your surcharge. The first four brackets adjust for inflation each year. The fifth and highest bracket is frozen at $500,000 (single) and $750,000 (joint) until 2028.
Single Filers and Married Filing Jointly
| 2024 MAGI (Single / Joint) | Total Monthly Part B Premium |
|---|---|
| ≤ $109,000 / ≤ $218,000 | $202.90 (standard — no IRMAA) |
| $109,001–$137,000 / $218,001–$274,000 | $284.10 ($81.20 surcharge) |
| $137,001–$171,000 / $274,001–$342,000 | $405.80 ($202.90 surcharge) |
| $171,001–$205,000 / $342,001–$410,000 | $527.50 ($324.60 surcharge) |
| $205,001–$499,999 / $410,001–$749,999 | $649.20 ($446.30 surcharge) |
| ≥ $500,000 / ≥ $750,000 | $689.90 ($487.00 surcharge) |
A single filer earning $110,000 in 2024 MAGI pays $284.10 per month — that’s $81.20 more than the base premium. A single filer earning $109,000 pays $202.90. That $1,000 difference in income costs an extra $974.40 per year in Part B premiums alone.
Married Filing Separately: The Harshest Brackets
Married couples who file separate tax returns face a much narrower and more punishing IRMAA scale. There are only three tiers instead of six.
| 2024 MAGI (Married Filing Separately) | Total Monthly Part B Premium |
|---|---|
| ≤ $109,000 | $202.90 (standard — no IRMAA) |
| $109,001–$390,999 | $649.20 ($446.30 surcharge) |
| ≥ $391,000 | $689.90 ($487.00 surcharge) |
A married person filing separately with a MAGI of $115,000 jumps straight to the $649.20 tier. A jointly filing couple at the same household income would pay only $202.90 each. Filing status alone can create a difference of more than $5,300 per person per year in Part B costs.
2025 IRMAA Brackets: Side-by-Side for Comparison
The 2025 IRMAA brackets use your 2023 MAGI. The standard Part B premium in 2025 is $185.00 per month.
| 2023 MAGI (Single / Joint) | Total Monthly Part B Premium |
|---|---|
| ≤ $106,000 / ≤ $212,000 | $185.00 (standard — no IRMAA) |
| $106,001–$133,000 / $212,001–$266,000 | $259.00 ($74.00 surcharge) |
| $133,001–$167,000 / $266,001–$334,000 | $370.00 ($185.00 surcharge) |
| $167,001–$200,000 / $334,001–$400,000 | $444.90 ($259.90 surcharge) |
| $200,001–$499,999 / $400,001–$749,999 | $591.90 ($406.90 surcharge) |
| ≥ $500,000 / ≥ $750,000 | $628.90 ($443.90 surcharge) |
The income thresholds rose by about 3% from 2025 to 2026. The surcharge amounts rose by about 9%. This means that even if your income stayed the same, your IRMAA surcharge could still increase year over year because the surcharges grew faster than the bracket thresholds.
IRMAA Applies to Part D Prescription Drug Plans Too
IRMAA does not stop at Part B. If you have Medicare Part D prescription drug coverage — or a Medicare Advantage plan with drug coverage — you pay a separate IRMAA surcharge on Part D as well. The same income brackets and two-year lookback apply.
| 2024 MAGI (Single / Joint) | Monthly Part D IRMAA Surcharge |
|---|---|
| ≤ $109,000 / ≤ $218,000 | $0.00 |
| $109,001–$137,000 / $218,001–$274,000 | $14.50 |
| $137,001–$171,000 / $274,001–$342,000 | $37.50 |
| $171,001–$205,000 / $342,001–$410,000 | $60.40 |
| $205,001–$499,999 / $410,001–$749,999 | $83.30 |
| ≥ $500,000 / ≥ $750,000 | $91.00 |
The Part D IRMAA surcharge is paid directly to Medicare, not to your drug plan or employer. You receive a separate monthly bill from Medicare. Even if a third party pays your Part D plan premiums, you are responsible for the IRMAA amount on top.
A beneficiary in the highest bracket pays $91.00 per month in Part D IRMAA plus $487.00 in Part B IRMAA. That’s $578.00 per month in surcharges alone — or $6,936 per year — before the base premiums are even counted.
The $1 Cliff Effect That Can Cost You Thousands
IRMAA is a cliff-based surcharge, not a gradual increase. Going $1 over a bracket threshold triggers the entire surcharge for that tier. There is no proration and no sliding scale within a bracket.
Consider a single filer with a 2024 MAGI of exactly $137,000. That person pays a Part B premium of $284.10 per month. If that same person earns $137,001, they jump to the next tier: $405.80 per month. That single extra dollar of income costs $1,460.40 more per year in Part B premiums.
This cliff design makes income planning near thresholds extremely important. A small capital gain, an unexpected IRA distribution, or even municipal bond interest can push you over. The difference between paying attention to these cliffs and ignoring them can be worth several thousand dollars per year.
Three Real-World Scenarios That Trigger IRMAA
Scenario 1: The Retiree Who Sells a Rental Property
Linda, age 68, is single and retired. Her regular income from Social Security and a small pension totals $85,000. She sells a rental property in 2024 for a $60,000 capital gain. Her MAGI for 2024 jumps to $145,000.
| Linda’s Situation | IRMAA Impact |
|---|---|
| Regular annual MAGI: $85,000 | No IRMAA — pays $202.90/month |
| 2024 MAGI with property sale: $145,000 | Tier 3 — pays $405.80/month in 2026 |
| Extra annual Part B cost | $2,434.80 |
| Extra annual Part D cost | $450.00 |
Linda now pays almost $2,900 more per year across Parts B and D because of a one-time property sale. If she had used an installment sale structure to spread the gain across two or three tax years, she could have stayed below the first IRMAA threshold entirely.
Scenario 2: The Couple Who Does a Large Roth Conversion
Tom and Maria, both age 66, are married and file jointly. Their combined MAGI from pensions and Social Security is $190,000. In 2024, they convert $100,000 from a traditional IRA to a Roth IRA. Their 2024 MAGI jumps to $290,000.
| Tom & Maria’s Situation | IRMAA Impact |
|---|---|
| Regular annual MAGI: $190,000 | No IRMAA — each pays $202.90/month |
| 2024 MAGI with Roth conversion: $290,000 | Tier 3 — each pays $405.80/month in 2026 |
| Extra annual Part B cost (both) | $4,869.60 |
| Extra annual Part D cost (both) | $900.00 |
The Roth conversion alone triggered nearly $5,770 in extra Medicare costs for the couple. Had they split the conversion into two $50,000 chunks across 2024 and 2025, they would have landed in Tier 2 instead — saving over $2,900 in combined surcharges.
Scenario 3: The Widow Hit by the Two-Year Lookback
Robert, age 72, lost his wife in early 2025. In 2024, the couple filed jointly with a combined MAGI of $230,000. Robert’s 2026 Medicare premium is based on that joint 2024 return, which puts him above the $109,000 single-filer threshold — even though his current income is only $70,000 per year.
| Robert’s Situation | IRMAA Impact |
|---|---|
| 2024 joint MAGI: $230,000 | IRMAA charged based on old filing |
| 2025 actual single income: $70,000 | Would qualify for no IRMAA |
| Monthly Part B overpayment | $81.20 per month |
| Annual overpayment | $974.40 |
Robert can file Form SSA-44 to report the death of his spouse as a life-changing event. If approved, the SSA will recalculate his IRMAA using his current, lower income — and he may receive a retroactive refund for premiums already overpaid.
9 Proven Strategies to Reduce or Avoid IRMAA
The core strategy for avoiding IRMAA is to lower your MAGI in the year that matters — which is two years before the premium year. Every dollar you keep out of MAGI is a dollar that can’t push you into a higher bracket.
1. Spread Roth conversions across multiple years. Converting a traditional IRA to a Roth increases your MAGI in the year of conversion. Breaking large conversions into smaller annual amounts keeps your MAGI below IRMAA thresholds while still building tax-free income for the future.
2. Use Qualified Charitable Distributions (QCDs). If you are 70½ or older, you can donate up to $110,000 per year directly from your traditional IRA to a qualified charity. QCDs count toward your Required Minimum Distribution (RMD) but are excluded from your MAGI. This is one of the most effective tools for retirees who already give to charity.
3. Balance withdrawals across account types. Pull income from a mix of taxable accounts, tax-deferred accounts (traditional IRA/401k), and tax-free accounts (Roth IRA/HSA). Using Roth and HSA funds to fill income gaps keeps MAGI below the next IRMAA cliff.
4. Harvest tax losses. Selling investments at a loss offsets capital gains dollar for dollar. This reduces your taxable income and, by extension, your MAGI. Pairing gains with losses in the same tax year is one of the simplest ways to control investment-related income.
5. Time large income events carefully. Selling a home, cashing in stock options, or taking a lump-sum pension payout can spike your MAGI for one year. Planning these events for a year when your other income is lower spreads the impact and may keep you in a lower tier.
6. Delay Social Security benefits strategically. Starting Social Security before age 70 adds taxable income to your MAGI. Delaying benefits during early retirement creates a window of lower income — perfect for doing Roth conversions or realizing capital gains without triggering IRMAA.
7. Maximize pre-tax contributions while still working. Contributing the maximum to a traditional 401(k), 403(b), or traditional IRA directly reduces your AGI. Every dollar contributed lowers your MAGI in the current year, which lowers your IRMAA calculation two years later.
8. Be cautious with municipal bonds. Tax-exempt interest from municipal bonds is added back into MAGI for IRMAA calculations. If you are close to a threshold, the interest from munis could push you over. Consider holding these bonds in tax-deferred accounts or substituting other fixed-income options.
9. Use an installment sale for real estate. Rather than collecting the full sale price of a property in one year, an installment sale spreads the capital gain across multiple tax years. This keeps any single year’s MAGI from spiking above a threshold.
How to Appeal IRMAA Using Form SSA-44
You do not have to accept an IRMAA surcharge if your income has dropped because of a qualifying life-changing event. The SSA allows you to request a new determination using Form SSA-44, officially called the “Medicare Income-Related Monthly Adjustment Amount – Life-Changing Event” form.
This form lets you report updated income information and ask the SSA to base your premium on your current financial situation instead of the two-year-old tax return. If approved, the adjustment can be retroactive, meaning you may receive a refund for months you already overpaid.
Life-Changing Events That Qualify for an IRMAA Appeal
The SSA recognizes a specific list of events that qualify for an appeal. Not every income drop counts — only these categories are accepted:
- Work stoppage — You fully retired or stopped working
- Work reduction — You significantly cut your hours and income dropped
- Death of a spouse — Your household income changed due to a spouse passing away
- Divorce or annulment — Your filing status and income changed after a marital split
- Marriage — A new marriage changed your combined income or filing status
- Loss of income-producing property — You involuntarily lost property that generated income (such as a natural disaster or forced sale)
- Loss or reduction of pension — A defined benefit pension was reduced or terminated
- Employer settlement payment — A one-time payout artificially inflated your MAGI for one year
The qualifying event must have occurred after the tax year the SSA used to calculate your current IRMAA. You cannot appeal simply because your investments performed poorly or because you chose to withdraw less from your IRA in the current year.
Step-by-Step: Filing Your IRMAA Appeal
Step 1: Gather your documentation. Collect proof of the life-changing event and proof of your reduced income. Examples include a letter from your employer confirming your retirement date, a death certificate, a divorce decree, or recent pay stubs showing lower earnings.
Step 2: Complete Form SSA-44. The form asks for details about the qualifying event, the date it occurred, and your estimated MAGI for the current year. Be accurate with your income estimate. Overestimating can leave your surcharge higher than necessary, while underestimating may raise red flags during the review.
Step 3: Submit to Social Security. You can mail the form and documentation to your local SSA office, fax it, or deliver it in person. Visiting in person can be helpful for complex situations because a representative can review your documents on the spot.
Step 4: Wait for the decision. The SSA processes most requests within 30 to 90 days. If approved, the premium adjustment may be retroactive to the date of your life-changing event. You may receive a refund for any months you overpaid.
What Happens If Your Appeal Is Denied
If the SSA denies your initial request, you have four levels of formal appeal available:
| Appeal Level | What Happens |
|---|---|
| Reconsideration (Form SSA-561-U2) | A different SSA reviewer examines your case from scratch |
| Administrative Law Judge (ALJ) Hearing | You present evidence and testimony before an impartial judge |
| Medicare Appeals Council | A council reviews the ALJ’s decision for legal errors |
| Federal District Court | You file a lawsuit in federal court as a last resort |
Each level has a 60-day deadline from the date you receive the denial notice. Missing a deadline can mean losing your right to appeal at that level. Most successful appeals are resolved at the initial request or reconsideration stage.
How You Pay Your IRMAA Surcharge
Your Part B IRMAA is automatically deducted from your monthly Social Security check. If you have delayed Social Security benefits, or if your Social Security check is not large enough to cover the full amount, CMS will send you a separate bill for the unpaid balance.
Your Part D IRMAA surcharge is billed separately by Medicare. You pay it directly — not through your drug plan or employer. There are three ways to pay online: through your MyMedicare.gov account, through your bank’s bill pay service, or through Medicare Easy Pay (an automatic bank transfer). You can also mail payment to the Medicare Premium Collection Center in St. Louis, MO.
Mistakes to Avoid With Medicare Part B IRMAA
Many retirees make avoidable errors that either trigger IRMAA or make it worse. Each mistake below carries a specific consequence that directly affects your premium.
Assuming the SSA will adjust your premium automatically. The SSA uses tax data from two years ago. It does not monitor your current income or make adjustments on its own. You must file Form SSA-44 to request a recalculation after a life-changing event. Failing to file means paying a surcharge you may not owe.
Converting your entire IRA to a Roth in one year. A full conversion can add hundreds of thousands of dollars to your MAGI in a single year. This pushes you into the highest IRMAA bracket and can trigger surcharges exceeding $6,900 per person. Splitting the conversion across several years is almost always the better approach.
Ignoring municipal bond interest in your MAGI calculation. Retirees often choose municipal bonds for their tax-free interest. But that interest is added back into MAGI for IRMAA purposes. A retiree who thinks their income is below a threshold could be pushed over by muni bond interest they assumed was invisible.
Missing the 60-day appeal deadline. If you receive an IRMAA determination letter and disagree, you have 60 days to respond. Letting that window close means losing the right to appeal at that level. Mark the date on your calendar the day you receive the notice.
Taking a large lump-sum IRA withdrawal for a major purchase. Pulling $80,000 from a traditional IRA to remodel your home or buy a vehicle can spike your MAGI for one year. This triggers IRMAA surcharges two years later. Splitting the withdrawal across two calendar years — or using a home equity line of credit — often avoids the bracket jump.
Filing taxes separately when married without checking IRMAA consequences. Married couples who file separately face the harshest IRMAA brackets. There is no middle ground — you jump from the standard premium to the second-highest tier if your individual MAGI exceeds $109,000. Always compare the total tax-plus-IRMAA cost of filing jointly versus separately before choosing your filing status.
Do’s and Don’ts of IRMAA Planning
| Do ✅ | Don’t ❌ |
|---|---|
| Do calculate your MAGI each year before December 31 so you can make adjustments in time | Don’t wait until tax season to check whether you crossed an IRMAA threshold |
| Do use Roth IRAs and HSAs for income that won’t show up in MAGI | Don’t assume all tax-free income is also IRMAA-free (municipal bond interest is not) |
| Do file Form SSA-44 promptly after a qualifying life-changing event | Don’t assume the SSA will lower your surcharge on its own |
| Do coordinate Roth conversions, capital gains, and Social Security start dates as a package | Don’t make large financial moves in isolation without checking the IRMAA impact |
| Do work with a financial planner or CPA who understands Medicare-specific income planning | Don’t rely on generic tax advice that ignores the two-year lookback |
| Do review your filing status each year, especially after marriage, divorce, or a spouse’s death | Don’t file separately if it pushes you into the punitive married-filing-separately IRMAA scale |
The Pros and Cons of Proactive IRMAA Planning
| Pros ✅ | Cons ❌ |
|---|---|
| Saves thousands per year — Staying below a threshold avoids $974 to $5,844+ in annual Part B surcharges | Requires ongoing attention — You must track MAGI every year and adjust before December 31 |
| Builds long-term tax-free income — Roth conversions done strategically now mean no MAGI impact in later years | Roth conversions increase taxes now — You pay income tax upfront on the converted amount |
| Creates flexibility in retirement spending — Lower premiums free up cash for healthcare, travel, or emergencies | May limit investment choices — Avoiding certain assets (like munis) to control MAGI reduces portfolio options |
| Retroactive refunds are possible — A successful SSA-44 appeal can return months of overpaid premiums | Appeals take time — Processing can take 30 to 90 days, with no guarantee of approval |
| Improves coordination across taxes, Medicare, and Social Security — A holistic plan aligns all three systems | Professional advice costs money — A CPA or financial planner familiar with IRMAA adds an annual expense |
Key Entities and How They Interact
Social Security Administration (SSA) determines your IRMAA each year based on IRS data. The SSA sends you a letter if you owe a surcharge and processes appeals through Form SSA-44.
Centers for Medicare & Medicaid Services (CMS) sets the standard Part B and Part D premiums each fall. CMS publishes the next year’s rates and deductibles in the fourth quarter. CMS also bills you for any Part D IRMAA surcharge.
Internal Revenue Service (IRS) provides your tax return data to the SSA. The MAGI figure from your return is what drives the entire IRMAA calculation. If you amend a prior return, you can call the SSA to request a recalculation.
Office of Medicare Hearings and Appeals (OMHA) handles formal hearings if your appeal is denied at the reconsideration level. An Administrative Law Judge at OMHA reviews evidence and makes an independent decision on your case.
These four agencies work together in a chain: the IRS sends income data to the SSA, the SSA applies the brackets set by CMS, and OMHA steps in if there’s a dispute. Understanding which agency handles which part of the process helps you direct your questions and paperwork to the right place.
FAQs
Does everyone on Medicare pay IRMAA?
No. Only about 8% of Medicare beneficiaries pay IRMAA. You pay it only if your MAGI exceeds $109,000 (single) or $218,000 (married filing jointly) based on your tax return from two years ago.
Can I appeal IRMAA if I just retired?
Yes. Retirement counts as a “work stoppage” life-changing event. File Form SSA-44 with proof of your retirement date, and the SSA may recalculate your premium using your current, lower income.
Does selling my house trigger IRMAA?
Yes, it can. Capital gains from a home sale increase your MAGI. Single filers can exclude up to $250,000 in profit, and joint filers can exclude up to $500,000, but gains above those limits count.
Is IRMAA a one-time charge or ongoing?
Neither — it resets every year. The SSA recalculates IRMAA annually based on your most recent available tax return. If your income drops, your surcharge can decrease or disappear the following year.
Does Roth IRA income count toward IRMAA?
No. Qualified Roth IRA withdrawals are not included in MAGI. Roth conversions, however, do count as taxable income in the year you convert and will increase your MAGI.
Can both spouses pay IRMAA?
Yes. IRMAA applies per person. If both spouses have Medicare and the household MAGI exceeds the threshold, each spouse pays the full surcharge on their own Part B and Part D premiums.
Does IRMAA apply to Medicare Advantage plans?
Yes. IRMAA applies to all Medicare beneficiaries, whether enrolled in Original Medicare or a Medicare Advantage plan. The surcharge is the same regardless of plan type.
Is there a way to get a refund for IRMAA I already paid?
Yes. If you file Form SSA-44 and the SSA approves your appeal, the adjustment can be retroactive. You may receive a refund for surcharges paid since the date of your qualifying life-changing event.
What happens if I miss the 60-day appeal deadline?
Yes, you lose the right to appeal at that level. You may request an extension by showing “good cause” for the delay, but approval is not guaranteed. Act within 60 days whenever possible.
Does Medicare Part A have an IRMAA surcharge?
No. IRMAA applies only to Medicare Part B and Part D. Most people pay no premium for Part A, and those who do pay a flat rate unaffected by income.
Related reading
- How Income Affects Medicare Part B (IRMAA)? (w/Examples) + FAQs
- Do High Earners Pay More for Medicare? (w/Examples) + FAQs
- Is Medicare Part B Deducted From Social Security? (w/Examples) + FAQs
- Does IRMAA Apply to Medicare Part D? (w/Examples) + FAQs
- Does IRMAA Affect Medicare Advantage Plans? (w/Examples) + FAQs
- Are IRMAA Premiums Per Person? (w/Examples) + FAQs
- Is Nationwide Long-Term Care Insurance Worth It? (w/Examples) + FAQs