IRMAA is one of those retirement acronyms that sounds like it escaped from a filing cabinet.
Then the letter arrives, and suddenly the filing cabinet has teeth.
IRMAA stands for income-related monthly adjustment amount. In plain English, it is the extra premium higher-income Medicare beneficiaries may pay for Part B and Part D.
The reason this matters for FamilyVest clients is simple: IRMAA is not only a Medicare issue. It is an income-design issue and a tax-planning issue. Roth conversions, capital gains, required distributions, business sales, real estate sales, and even an otherwise sensible one-time withdrawal can change what you owe.
That means IRMAA belongs in retirement planning, not in an isolated government-document corner.
What IRMAA is and why retirees get blindsided by it
Many retirees know Medicare has premiums. Fewer realize those premiums can increase based on income.
Under current SSA rules, a higher-income beneficiary may pay an additional monthly amount for Part B and Part D. Social Security generally uses the most recent federal tax return information provided by the IRS to determine whether IRMAA applies.
What surprises people is not only the existence of IRMAA. It is the timing.
The premium increase often shows up after the income event that caused it. By then, the Roth conversion is already done, the property already sold, or the capital gain already realized.
That is why good planning has to look ahead.
Which income is used and when
The two-year lookback
For 2026 Medicare premiums, SSA says it generally uses the most recent federal tax return the IRS provides, which is usually the 2024 return filed in 2025. In some cases, the IRS may provide older data first and SSA updates its records later.
That delayed lookback is one reason households feel ambushed. The income event and the premium increase do not arrive on the same calendar page.
MAGI matters
For IRMAA, SSA uses a version of modified adjusted gross income that includes your adjusted gross income plus tax-exempt interest income.
That means even income that feels “not really taxable in the normal sense” can still matter for IRMAA.
One-time spikes still count
The Medicare system is not particularly sentimental about whether the income was “just a one-time event.”
If the tax return reflects it, IRMAA may reflect it too.
Current 2026 IRMAA table
Last reviewed: March 17, 2026
Applies to 2026 Medicare premiums, generally based on 2024 MAGI
Individual and joint filers
| 2024 MAGI (individual) | 2024 MAGI (married filing jointly) | 2026 Part B total premium | 2026 Part D IRMAA add-on |
|---|---|---|---|
| $109,000 or less | $218,000 or less | $202.90 | $0.00 |
| Above $109,000 up to $137,000 | Above $218,000 up to $274,000 | $284.10 | $14.50 |
| Above $137,000 up to $171,000 | Above $274,000 up to $342,000 | $405.80 | $37.50 |
| Above $171,000 up to $205,000 | Above $342,000 up to $410,000 | $527.50 | $60.40 |
| Above $205,000 and below $500,000 | Above $410,000 and below $750,000 | $649.20 | $83.30 |
| $500,000 or more | $750,000 or more | $689.90 | $91.00 |
Married filing separately
| 2024 MAGI (married filing separately and lived with spouse at some point during the year) | 2026 Part B total premium | 2026 Part D IRMAA add-on |
|---|---|---|
| $109,000 or less | $202.90 | $0.00 |
| Above $109,000 and below $391,000 | $649.20 | $83.30 |
| $391,000 or more | $689.90 | $91.00 |
That table is why IRMAA feels “cliff-like” in practice. Crossing a threshold can raise monthly healthcare costs even when the extra income came from a one-time planning move.
Common triggers that push retirees into IRMAA
Roth conversions
Roth conversions are often smart tools. They are also taxable income in the conversion year.
A conversion done without considering Medicare thresholds can create a premium surprise later. That does not mean “never convert.” It means conversions should be sized and timed with IRMAA in mind.
Large capital gains
Selling appreciated stock, real estate, or concentrated positions can raise income quickly. This is especially common around diversification planning, vacation-home sales, or inherited-property decisions.
Required minimum distributions
RMDs can become one of the stealthiest IRMAA drivers because they are often unavoidable once they begin. A large pre-tax balance does not just create future tax risk. It can create future Medicare-cost risk too.
Business sales and other liquidity events
Business owners are especially vulnerable to IRMAA surprises because sale proceeds, installment income, and related tax events can reshape premium costs in the years that follow.
Strategies that may reduce IRMAA exposure
There is no universal “avoid IRMAA” button. There are, however, several strategies that can improve the odds of a smoother outcome.
Spread taxable income over time
A series of smaller Roth conversions over several years may work better than one giant conversion in a single year. The same general logic applies to gain realization and other taxable events where timing is flexible.
Use withdrawal sequencing thoughtfully
The mix of taxable, tax-deferred, and Roth withdrawals matters. In some years a Roth withdrawal may help avoid crossing a premium threshold. In other years, measured IRA withdrawals may still make sense because they reduce future RMD pressure.
Coordination matters more than slogans.
Use QCDs where appropriate
For charitably inclined IRA owners age 70½ or older, qualified charitable distributions can reduce the amount of otherwise taxable IRA income entering the return, which can help with both tax planning and Medicare-premium planning.
Coordinate retirement, Social Security, and Medicare timing
The years around age 63 through Medicare enrollment are often particularly important because they can combine work transitions, conversions, gains, benefit timing, and healthcare enrollment in a short window.
This is one reason Tax-Efficient Retirement Income Strategies and How to Claim Social Security Strategically belong next to this page.
What if your income has gone down?
Here is the part many households miss: IRMAA is not always final.
SSA allows beneficiaries to request a lower IRMAA after certain life-changing events that reduce household income. Examples listed by SSA include:
- marriage,
- divorce,
- death of a spouse,
- work stoppage,
- work reduction,
- loss of income-producing property due to circumstances beyond your control,
- and certain employer pension or settlement events.
SSA uses Form SSA-44 for these life-changing event requests.
This is not a loophole circus. It is an official correction path for households whose recent financial reality is no longer reflected by the return SSA used.
Appealing IRMAA versus requesting a new decision
There are really two related paths:
- If the income information SSA used is wrong or outdated because of a life-changing event, you may request a new determination.
- If you disagree with SSA’s decision itself, you may file an appeal.
The distinction matters, but the practical takeaway is simple: do not assume the first IRMAA letter is the end of the road if your income has truly fallen.
A simple IRMAA example
Imagine a married couple already enrolled in Medicare.
Their taxable income is usually modest enough to remain under an IRMAA threshold. Then they complete a large Roth conversion in one year to reduce future RMDs. The conversion may still be smart. But if it pushes MAGI across a threshold, their Part B and Part D costs can rise in 2026 based on that earlier tax year.
That does not mean the conversion was a mistake. It means the premium effect should have been part of the analysis before the move was made.
Frequently asked questions about IRMAA
What does IRMAA stand for?
IRMAA stands for income-related monthly adjustment amount. It is the extra amount some higher-income Medicare beneficiaries pay for Part B and Part D.
Which income counts for IRMAA?
SSA generally uses modified adjusted gross income, which includes adjusted gross income plus tax-exempt interest income, based on the tax return information it receives from the IRS.
Can Roth conversions increase Medicare premiums?
Yes. Roth conversions are taxable income in the year of the conversion, so they can raise MAGI and potentially push a beneficiary into a higher IRMAA tier.
Can IRMAA be appealed or reduced?
Yes. SSA provides a process to request a lower IRMAA after certain life-changing events, and beneficiaries may also appeal decisions when appropriate.
Does IRMAA last forever?
No. IRMAA is recalculated based on the tax return information SSA receives. A one-time spike in income can affect premiums for a period of time, but it does not permanently attach itself to you like a cursed barnacle.
Read these next
To round out the Medicare and tax side of the retirement pillar, continue with:
- The FamilyVest Guide to Retirement & Distribution Planning
- Do You Still Need Medicare If Working at 65?
- Tax-Efficient Retirement Income Strategies
- Roth Conversion Strategies in Retirement
- Which Accounts Should You Spend First in Retirement?
Review IRMAA Before an Income Event Turns Into a Premium Surprise
IRMAA is not just a Medicare problem. It is a retirement-income design problem. When withdrawals, conversions, gains, and healthcare costs are planned together, the household usually gets a better answer than when each piece wanders off on its own. Explore our retirement planning approach or start a conversation.
