What Is IRMAA? How Medicare Surcharges Affect Retirement
Updated: Oct 8
Written by John Macy, Financial Coach, MBA, Retirement Income Certified Professional® (RICP)
Introduction
Many retirees are surprised to discover that Medicare premiums aren't the same for everyone. Higher-income retirees can pay thousands of dollars more each year because of a little-known rule called IRMAA.
This is the reality of the Medicare IRMAA surcharge. It is one of the most frustrating, unexpected financial blind spots that catches pre-retirees off guard. The good news is that with a little proactive planning—and understanding how the puzzle pieces of your wealth fit together—you can completely defuse it before it hits your wallet.
Here is a practical guide on how IRMAA works, who it impacts, and the advanced strategies you can use to protect your hard-earned retirement income.
Quick Summary: What is the Medicare IRMAA Surcharge?
IRMAA (Income-Related Monthly Adjustment Amount) is a monthly surcharge added to Medicare Part B (medical insurance) and Part D (prescription drug coverage) premiums for higher-income retirees. It is determined by your Modified Adjusted Gross Income (MAGI) from two years prior. Because it operates on strict "income cliffs," crossing a threshold by even one dollar triggers the full surcharge for the entire year.
Most retirees pay the standard base premiums for Medicare Parts B and D. However, if your income is too high, IRMAA requires higher-income beneficiaries to pay additional monthly premiums. Because these surcharges are deducted directly from your monthly Social Security check, it can feel like an unexpected reduction in your monthly retirement income.
How is the Medicare IRMAA Surcharge Determined? (The 2-Year Lookback)
The IRS and the Social Security Administration determine your IRMAA eligibility using a specific metric called Modified Adjusted Gross Income or MAGI (essentially your adjusted gross income from your tax return, plus any tax-exempt interest income you received from things like municipal bonds).
What is included in MAGI? All of the following types of income:
Income Type | Examples Included in Your MAGI for IRMAA Calculation |
Retirement Income | Pension, Social Security, Traditional IRA or 401(k) withdrawals |
Investment Income | Dividends, Interest (including from municipal bonds), Capital Gains, Rental Income |
Employment Income | Wages, Self-Employment Income, Business Income |
Tax Planning Transactions | Roth Conversions |
The most critical thing to understand about IRMAA is its two-year look-back mechanism. The government does not look at what you are earning today; they look at your tax return from two years ago. For example, your Medicare premiums in 2027 are determined by the MAGI you reported on your tax return for 2025.
Example: Mark retires in 2027 at age 65. In 2025 he completed a $150,000 Roth conversion while still working. Even though his retirement income in 2027 is modest, Medicare uses his 2025 tax return to determine his premiums. As a result, he pays higher Medicare premiums for one year because of income earned two years earlier.
Age 63 marks the beginning of Medicare's two-year lookback period, making it one of the most important milestones for IRMAA planning. The financial moves, capital gains, Roth conversions, or distribution strategies you execute starting the year you turn 63 will directly dictate what you pay for healthcare the moment you enroll in Medicare at age 65 and beyond.
Who Does IRMAA Affect and to What Extent?
IRMAA is not a smooth, progressive tax bracket where you only pay a higher rate on the dollars that cross the line. Instead, it operates on a series of strict income cliffs. If you cross a threshold by even a single dollar, your entire premium jumps up to the next tier for the whole year.
For 2026, the standard base premium for Medicare Part B is $202.90 per month. If your income stays below the baseline, that is all you pay.
However, look at how quickly the surcharges stack up once you step over the cliffs:
2026 Medicare IRMAA Brackets and Income Thresholds
Individual MAGI (2 Years Prior) | Married Joint MAGI (2 Years Prior) | Additional Part B Surcharge | Additional Part D Surcharge | Total Combined Annual Cost (Per Person) |
$109,000 or less | $218,000 or less | $0.00 (Standard) | $0.00 (Standard) | $2,435 (Base premium only) |
$109,001 to $137,000 | $218,001 to $274,000 | +$81.20 / mo | +$14.50 / mo | $3,583 |
$137,001 to $171,000 | $274,001 to $342,000 | +$202.90 / mo | +$37.50 / mo | $5,320 |
$171,001 to $205,000 | $342,001 to $410,000 | +$324.60 / mo | +$60.40 / mo | $7,055 |
$205,001 to $499,999 | $410,001 to $749,999 | +$446.30 / mo | +$83.30 / mo | $8,790 |
$500,000 or more | $750,000 or more | +$487.00 / mo | +$91.00 / mo | $9,371 |
These thresholds are adjusted periodically, so always check the current year's Medicare tables. The 2026 Medicare premiums can be found here.
For a married couple sliding into Tier 1 by just a few dollars, that single "mistake" adds an extra $2,296 in health insurance costs for the year. If you slide into Tier 2, that penalty jumps to an extra $5,770 per couple.
Master Strategies to Defuse the IRMAA Trap
Because IRMAA is an annual calculation, you are never permanently stuck in an IRMAA surcharge bracket. You can actively manage your income stream to minimize or entirely sidestep these surcharges.
Fortunately, there are several proven planning strategies that can dramatically reduce — or even eliminate — future IRMAA surcharges. The earlier you begin, the more flexibility you have.
Strategy 1: Execute Roth Conversions Before the Age 63 Milestone
For many people, the single biggest driver of lifetime IRMAA surcharges is RMDs (Required Minimum Distributions — the mandatory withdrawals the government forces you to take from traditional IRAs starting at age 73 or 75 depending on your year of birth). If you have a large pre-tax nest egg, your future RMDs can easily push you over the IRMAA cliffs automatically.
By executing Roth conversions early in retirement, you move money out of traditional accounts and into a Roth IRA. Roth IRA distributions are generally tax-free if IRS requirements are met and do not count toward your MAGI calculation.
The Golden Window: Focus heavily on these conversions before you turn 63. Because you are outside the two-year Medicare lookback window, you can deliberately spike your income to convert large chunks of your traditional accounts without triggering a single penny of IRMAA penalties.
The optimal conversion amount depends on your tax bracket, future RMD projections, and IRMAA thresholds. Ideally, Roth conversions should be coordinated not only with future IRMAA thresholds but also with your current and expected future federal tax brackets. Learn more about guiding principles for when you should (and should not) do Roth conversions.
Strategy 2: Coordinate Multi-Bucket Withdrawals
When you need to draw cash for retirement living expenses, pulling exclusively from a Traditional IRA can rapidly shoot your taxable income over an IRMAA cliff.
Instead, utilize a balanced withdrawal sequence that blends distributions across three distinct buckets: taxable brokerage accounts, tax-deferred accounts (Traditional IRA/401(k)), and tax-free accounts (Roth IRA). Because investment income and capital gains vary from year to year, many retirees benefit from reviewing their projected MAGI each fall before year-end. If you find your income creeping uncomfortably close to an IRMAA threshold near the end of the year, you can stop drawing from your Traditional IRA and fill the remaining income gap using tax-free Roth distributions or selective sales of appreciated investments in your taxable brokerage account. (Read our guide to strategic tax-efficient withdrawal strategies.)
Strategy 3: Bypass MAGI Directly with QCDs
If you are age 70½ or older and maintain a charitable legacy, you shouldn't write standard checks to your favorite causes. A standard cash contribution requires you to itemize on Schedule A to get a tax benefit, but it completely fails to lower your MAGI for Medicare calculations.
By utilizing a Qualified Charitable Distribution (QCD), you can transfer up to the annual IRS limit ($111,000/year in 2026) directly from your Traditional IRA to an eligible 501(c)(3) charity. The beauty of the QCD is that the money satisfies your Required Minimum Distribution but is excluded from your adjusted gross income entirely. Because it never enters your tax return as income, it bypasses the MAGI calculation entirely, protecting your IRMAA brackets while supporting the causes you love. (See our deep dive on how to use Qualified Charitable Distributions (QCDs) effectively).
Strategy 4: Delay Social Security
Delaying your Social Security benefits up to age 70 is a well-known way to maximize your guaranteed, inflation-protected lifetime income. But it also serves an incredible dual purpose for tax planning.
The years after retirement but before claiming Social Security and before Required Minimum Distributions begin create a natural low-taxable-income window. Because you aren't drawing on Social Security yet, you have much more baseline flexibility to withdraw from your investment portfolios or execute smaller, surgical Roth conversions right up to the edge of the very first IRMAA bracket when you are age 63 or 64 without accidentally tripping over the cliff.
Even after age 63, having lower taxable income due to delayed Social Security can reduce your IRMAA surcharges between ages 65-72.
If needed, build an income bridge to help you delay Social Security without sacrificing your retirement lifestyle.
Strategy 5: Optimize Your "Asset Location"
Asset location matters. Investments that generate ordinary taxable income — such as bond funds, REITs, CDs, and money market funds — can increase your MAGI every year. Holding these assets inside tax-deferred retirement accounts can reduce taxable income while keeping tax-efficient stock index funds in taxable accounts. Although asset location alone usually won't eliminate IRMAA, over many years it can significantly reduce taxable investment income and reduce future IRMAA exposure. (Read our guide to strategic Asset Location.)
Strategy 6: Bunch Your Income (The "One and Done" Strategy)
Sometimes, a spike in income is completely unavoidable. Maybe you need to sell a highly appreciated property, rebalance a large taxable brokerage account, or take a massive capital gain to fund a specific lifestyle goal.
If you know an asset sale is going to push you over the IRMAA thresholds, do not spread the income out over three or four years. Trickling the income means you will trigger IRMAA surcharges year after year.
Instead, bunch the income entirely into a single calendar year. Go intentionally deep into a higher IRMAA tier for just twelve months. You will pay the higher premium surcharge two years down the road, but it will be a contained, one-year event, allowing your income — and your Medicare premiums — to drop right back down to normal the following year. Before deliberately bunching income into a single year, however, evaluate the broader tax consequences. In some cases, the additional federal or state income tax may outweigh the IRMAA savings.
Strategy 7: Advanced Strategy: Bunching Deductions & Roth Conversions via a DAF
While a standard charitable donation might reduce your taxable income, it does not inherently lower your MAGI for IRMAA purposes. However, you can use a sophisticated structural strategy to execute a sizable, tax-free Roth conversion before age 63. This is a multi-step strategy.
Step 1: You set up a Donor Advised Fund (DAF) — a charitable giving account that allows you to contribute multiple years' worth of donations all at once. By "bunching" these contributions into a single year and itemizing your deductions, you generate a massive charitable tax deduction.
Step 2: You pair that itemized deduction with a large Roth conversion in the exact same tax year. The enormous itemized deduction from your DAF contribution can heavily reduce or entirely wipe out the ordinary federal income tax liability generated by the Roth conversion. If you do this before age 63, the massive jump in MAGI has zero impact on your future Medicare premiums, while permanently reducing your future RMDs which could trigger IRMAA surcharges. (See this article for a more detailed look at this strategy.)
Strategy 8: Appeal an IRMAA Surcharge Using Form SSA-44
What happens if you didn't plan ahead, and you get hit with an IRMAA bill based on income from two years ago when you were still working a high-paying corporate job?
You don't necessarily have to pay it. The Social Security Administration recognizes that major life transitions alter your financial reality. If you experience an official "Life-Changing Event" you can file Form SSA-44 to request a reduction in your Medicare IRMAA Surcharge. Qualifying life-changing events include work stoppage (retirement) or a significant reduction in work hours, the death of a spouse, divorce or annulment, loss of income-producing property under certain circumstances, and employer settlement payments.
By filing form SSA-44 along with proof of your retirement (like an employer letter) or other qualifying life-changing event, you can request that Medicare recalculate your premiums using an estimate of your current year's lower retirement income rather than your peak working income from two years prior. This simple, 15-minute appeal saves newly retired couples thousands of dollars every year.
Common IRMAA Mistakes
Waiting until age 65 to think about IRMAA
Large Roth conversions after age 63 without planning
Unexpected capital gains from selling investments
Ignoring Required Minimum Distributions
Not coordinating withdrawals across account types
Assuming tax-free municipal bond interest doesn't affect IRMAA
Forgetting to appeal IRMAA surcharges after retirement
Clear Planning Leads to Peace of Mind
Successful retirement planning is about much more than just accumulating a nest egg; it is about managing the subtle, interconnected tax cliffs that dictate how much of that nest egg you actually get to keep. For many retirees, IRMAA can be significantly reduced — or even avoided entirely — with proactive planning, but it requires looking at your finances as an integrated ecosystem where asset location, withdrawal sequencing, and health insurance costs all talk to one another.
The best time to plan for IRMAA is before Medicare begins—not after you receive a higher premium notice. Many of the most effective strategies, including Roth conversions, withdrawal planning, and tax-efficient asset location, work best when implemented years in advance. A coordinated retirement income plan can often save thousands of dollars in Medicare premiums while also reducing lifetime taxes.
The goal isn't simply to pay lower Medicare premiums. It's to create a retirement income strategy that gives you confidence, minimizes unnecessary taxes, and lets you spend more of your hard-earned savings on the life you want to live. That's the kind of retirement plan we help our clients build.
If you want to build a resilient, predictable retirement paycheck that keeps you on the right side of the tax cliffs, let's look at your plan together.
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Author: John Macy, MBA, RICP®
John Macy is a professional financial coach and the founder of FlourishingPath Financial Coaching. With over six years of experience as a financial coach, John helps pre-retirees and retirees design resilient portfolios and income streams for their next act. Read his full story here.
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