The Medicare IRMAA Surcharge Can Add Thousands to Your Retirement Costs. Here’s How to Avoid It
A hidden Medicare surcharge blindsides thousands of retirees each year, and the income decisions you make today are already setting the bill you will receive two years from now.
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Most retirees assume their Medicare premiums are fixed, budget for the standard Part B cost, and move on. What catches higher-income retirees off guard is a separate charge that can quietly add thousands of dollars a year to healthcare costs. It is called IRMAA, and grasping how it works is one of the more valuable things a retiree can do before the bills start arriving.
IRMAA stands for Income-Related Monthly Adjustment Amount, and it is a surcharge layered on top of the standard Medicare Part B and Part D premiums for enrollees whose income exceeds certain thresholds. The Centers for Medicare and Medicaid Services estimates that roughly 8% of Part B beneficiaries pay it, a share that grows each year as investment account balances and required distributions push more retirees above the cutoffs.
The surcharge is not based on what you earn this year. It is based on your modified adjusted gross income from two years earlier, which means the retirement income decisions you make today can affect your Medicare costs two years down the road.
How IRMAA Brackets Work in 2026
The standard Part B premium in 2026 is $202.90 per month, up $17.90 from the 2025 rate of $185.00. For retirees whose 2024 modified adjusted gross income exceeded $109,000 as a single filer, or $218,000 for a married couple filing jointly, that standard premium becomes a floor, not the final number.
The brackets escalate quickly. A single filer with 2024 MAGI between $109,000 and $137,000 pays $284.10 per month for Part B rather than the standard $202.90. Moving into the next bracket, from $137,000 to $173,000, pushes the premium to $405.80. Critically, IRMAA operates as a cliff system: exceeding any income threshold by even one dollar triggers the full surcharge for that entire bracket. A retiree with $137,001 in 2024 MAGI pays the same 2026 premium as someone with $170,000.
At the top of the scale, single filers with income above $500,000 and married couples above $750,000 pay $689.90 per month for Part B alone. That is nearly $487 more per person per month than the base premium, or close to $5,844 per year in additional costs. Part D surcharges, which range from $14.50 to $91.00 per month depending on income tier, apply on top of Part B at each bracket.
For a married couple where both spouses are assessed at the highest tier, the combined surcharge adds close to $11,688 per year in Medicare costs that most retirement budgets never anticipated. Factoring in Part D, a high-income retired couple can end up paying well over $12,000 per year in added Medicare premiums relative to a household just below the lowest IRMAA threshold.
Why Retirees Get Surprised
The two-year lookback is where most retirees run into trouble. A person who retires at 63 with significant income from a final working year, or who takes a large Roth conversion, sells appreciated property, or receives a required minimum distribution that pushes income higher, can find themselves paying IRMAA surcharges at 65 based on income that no longer reflects their actual financial situation.
Required minimum distributions are a particularly common trigger. Once a retiree turns 73, RMDs from traditional IRAs and 401(k) accounts become mandatory and count toward MAGI in full. As portfolio balances grow through decades of tax-deferred compounding, those mandatory withdrawals can be far larger than a retiree expects.
Combined with Social Security income and other taxable distributions, RMDs can push income into an IRMAA bracket even for retirees who consider themselves to have modest means. The surprise is compounded by the fact that most people are not thinking about Medicare costs when managing investment accounts in their mid-to-late 60s.
Five Strategies That Can Reduce the Surcharge
IRMAA is not a fixed fate. Thoughtful income planning in the years before and during retirement can reduce or eliminate exposure, and the five levers below are the most widely used tools.
Managing RMDs before they become unavoidable is the first and most impactful lever. Because traditional IRA balances grow tax-deferred for decades, many retirees arrive at 73 with a far larger RMD than expected. Taking voluntary distributions earlier, before RMDs are required, smooths taxable income over more years and can keep MAGI below the thresholds that trigger surcharges.
Roth conversions work alongside this strategy. Converting portions of a traditional IRA to a Roth account in lower-income years, particularly before Social Security begins and before RMDs kick in, reduces the future balance subject to mandatory withdrawals. Because Roth distributions are not counted in MAGI, they produce tax-free income that does not push toward an IRMAA bracket. The key is sizing each conversion carefully to avoid crossing a bracket cliff in the conversion year itself.
The 0% long-term capital gains rate offers a third option for retirees with lower taxable income in early retirement. Realizing gains while income qualifies for that 0% rate reduces the future embedded gains in a portfolio, lowering the MAGI impact of eventual sales.
Qualified charitable distributions are the fourth tool, and they have become even more valuable in 2026. Available to retirees aged 70 and a half or older, a QCD allows direct transfers from a traditional IRA to a qualified charity of up to $111,000 per individual for the 2026 tax year, up from $108,000 in 2025. The limit is now indexed for inflation annually. A QCD satisfies all or part of an RMD without the amount counting as taxable income, which directly reduces MAGI and can keep a retiree below a bracket they would otherwise cross. Changes to itemized charitable deduction rules under recently enacted federal legislation have made QCDs an even more attractive giving strategy for retirees who want to support charities while managing Medicare costs.
Finally, IRMAA surcharges can be appealed when a significant life change has reduced income. Marriage, divorce, death of a spouse, retirement, or loss of income are all qualifying events that allow a retiree to request an adjustment using a more recent year’s income. Filing Form SSA-44 with the Social Security Administration is the starting point for the process, and approval rates for legitimate life-changing events are high.
For retirees who have spent years building a portfolio, IRMAA can feel like an arbitrary tax on doing things right. The brackets are not going away, but with enough advance planning, most retirees have considerably more control over their exposure than they realize.
Editor’s note: This article has been updated to reflect the 2026 qualified charitable distribution limit of $111,000 per individual (raised from $108,000 in 2025), to correct the top IRMAA bracket threshold for married couples filing jointly to $750,000, and to add the 2025-to-2026 Part B premium increase, confirmed Part D surcharge range of $14.50 to $91.00 per month, and the cliff mechanic that causes any dollar over a threshold to trigger the full bracket surcharge.
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David Beren has been a Flywheel Publishing contributor since 2022. Writing for 24/7 Wall St. since 2023, David loves to write about topics of all shapes and sizes. As a technology expert, David focuses heavily on consumer electronics brands, automobiles, and general technology. He has previously written for LifeWire, formerly About.com. As a part-time freelance writer, David’s “day job” has been working on and leading social media for multiple Fortune 100 brands. David loves the flexibility of this field and its ability to reach customers exactly where they like to spend their time. Additionally, David previously published his own blog, TmoNews.com, which reached 3 million readers in its first year. In addition to freelance and social media work, David loves to spend time with his family and children and relive the glory days of video game consoles by playing any retro game console he can get his hands on.
