Kenneth sat down in my office last April with a Medicare premium notice and a look on his face I've seen more times than I care to count. He and his wife Linda, both 68, had been on Medicare for three years. Standard premiums, no surprises. Then they opened the 2026 determination letter.
"Ben, they want $284.10 a month from each of us," Kenneth said. "Last year it was $202.90. What the hell happened?"
I asked him one question: "Did you sell anything in 2024? Stocks, property, anything?"
He'd sold a rental property in August 2024. Good timing on the market, cleared about $140,000 in capital gains after depreciation recapture. He'd already paid the taxes on it. Thought he was done. But that gain pushed their modified adjusted gross income over $218,000 — and two years later, Medicare came calling for an extra $81.20 per person, per month. That's $1,948.80 a year in premiums they never saw coming, triggered by a transaction they'd stopped thinking about eighteen months ago.
Kenneth isn't careless. He's a retired engineer. He planned the sale, hired an accountant, paid his taxes. But nobody — not the accountant, not his broker, not Medicare — told him about IRMAA.
What IRMAA Actually Is
IRMAA stands for Income-Related Monthly Adjustment Amount. It's a surcharge on your Medicare Part B and Part D premiums that kicks in when your income exceeds certain thresholds. The standard Part B premium for 2026 is $202.90 per month. If your income is high enough, you pay more. Sometimes a lot more.
What many people don't realize is that IRMAA isn't based on your current income. It's based on your Modified Adjusted Gross Income — your MAGI — from two years prior. So your 2026 premiums are calculated from your 2024 tax return. The Social Security Administration pulls this directly from the IRS. No one asks you. No one warns you. The first you hear about it is the determination letter in your mailbox.
MAGI, for these purposes, is your adjusted gross income (line 11 on your 1040) plus any tax-exempt interest income (line 2a). That second part trips people up, and I'll explain why in a moment.
One thing I want to be clear about: IRMAA is not a penalty. It's a premium adjustment for higher-income beneficiaries. But it feels like a penalty when you're writing the check, and the two-year delay between the triggering event and the bill makes it feel even worse.
The 2026 Brackets and the Cliff That'll Make You Wince
This gets a bit technical, but bear with me — the numbers matter.
For married couples filing jointly, the first IRMAA threshold in 2026 is $218,000 in MAGI. Below that, you pay the standard $202.90 per month for Part B. Go one dollar over — $218,001 — and your premium jumps to $284.10 per person.
That's an extra $81.20 per person per month. For a couple, it's $162.40 per month, or $1,948.80 per year. From a single dollar of income. I always tell my clients: this isn't a slope. It's a cliff.
The brackets get steeper from there. At $274,001 to $342,000, you're paying $405.80 per month each for Part B — more than double the standard premium. At the very top, above $750,000, it's $689.90 per person per month.
A couple sitting in that third tier — say, $300,000 in MAGI — is paying about $9,739 a year in Part B premiums versus $4,870 at the standard rate. That's roughly $4,870 in extra premiums for a couple, every single year. Over a decade, that's $48,700. And that's before Part D surcharges, which follow their own bracket structure on top of this.
I had a client, Diane, who missed the first threshold by $3,200. She'd done a small Roth conversion to "clean up" an old IRA. Three thousand two hundred dollars in extra income. Cost her and her husband $1,948 in Medicare surcharges the following year. She looked at me across the desk and said, "That's a sixty percent tax on a three-thousand-dollar conversion." She wasn't wrong.
What Triggers IRMAA — and Why the Surprises Keep Coming
This is where most people make their mistake. They think of IRMAA as something that only hits the wealthy. But a one-time event can push an otherwise moderate-income retiree right over the cliff. Here's what I've seen catch people:
Home sales. If you sell your primary residence and the gain exceeds the $250,000 exclusion ($500,000 for married couples), the excess counts toward MAGI. Sell a house you bought in 1988 for $120,000 that's now worth $750,000, and that math gets uncomfortable fast.
Roth conversions. The converted amount counts as ordinary income. I wrote about this in detail in my guide to Roth conversions after retirement — the IRMAA trap is real, and it's the reason I tell every client to spread conversions over multiple years rather than doing one large lump sum.
required minimum distributions. Once you hit 73, the IRS tells you how much to withdraw from your traditional IRA. For someone with a $900,000 IRA balance, that first RMD is around $34,000. Stack that on top of Social Security and a pension, and you can cross the threshold without making a single voluntary financial move.
Inherited IRA distributions. Under the SECURE Act's 10-year rule, if you inherit a traditional IRA, those mandatory withdrawals add to your MAGI.
The municipal bond surprise. This one genuinely catches people off guard. Tax-exempt interest from municipal bonds doesn't count on your regular tax return — but it does count toward MAGI for IRMAA purposes. I've had clients who built entire bond portfolios around tax efficiency, only to discover that the interest was pushing them into a higher Medicare bracket. The IRS giveth, and IRMAA taketh away.
And because the lookback period is two years, by the time you get the surcharge notice, you've long since forgotten about the event that caused it. Kenneth certainly had.
The Appeal Process Most People Don't Know Exists
Let me be direct about this: if your income spiked because of a life-changing event, you may not have to pay the surcharge.
Social Security Form SSA-44 allows you to appeal your IRMAA determination based on a qualifying life event. There are eight events that qualify: marriage, divorce, death of a spouse, work stoppage, work reduction, loss of income-producing property, loss of pension income, and employer settlement or closure.
The appeal asks SSA to use your current year's income — or a more recent year — instead of the two-year lookback. I've filed these for clients who retired mid-year and saw their income drop dramatically. It works. One client went from the second IRMAA tier back to the standard premium within six weeks of filing.
But — and this is the part that frustrates people — voluntary financial decisions don't qualify. Roth conversions, home sales, stock sales, investment gains: none of these are considered life-changing events for SSA-44 purposes. If you sold a rental property and it pushed you over, there's no appeal. You planned that transaction. You pay the surcharge.
If you do have a qualifying event, file within 60 days of receiving your determination letter. Bring documentation — a letter from your former employer, a death certificate, divorce decree, whatever applies. The process is straightforward, but you have to know it exists. In my experience, most people don't.
Strategies That Actually Work to Minimize IRMAA
The best strategy against IRMAA is the same one I recommend for most tax issues: plan before it happens, not after.
Income smoothing. If you're doing Roth conversions — and I think most retirees with significant traditional IRA balances should be — spread them over years. Convert $40,000 to $60,000 annually instead of $180,000 in one shot. The total tax bill is similar over time, but you stay below the IRMAA cliffs. I walk through the mechanics of this in my Roth conversion guide.
Qualified Charitable Distributions. If you're 70½ or older and charitably inclined, QCDs are one of the most powerful tools in the tax code. You can direct up to $111,000 per year from your IRA directly to a qualified charity, and that amount is excluded from your AGI entirely. It doesn't appear on your tax return as income. It doesn't count toward MAGI. It satisfies your RMD requirement. I've seen this single strategy keep clients below the IRMAA threshold year after year.
Roth withdrawals don't count. Money you pull from a Roth IRA has no effect on your MAGI. None. This is the long game — years of measured conversions now mean tax-invisible income later.
Multi-year MAGI projections. The real key is running the numbers forward, not just for this year but for three to five years out. What happens when Social Security starts? When RMDs kick in at 73? When you sell the vacation property? If you can see the IRMAA cliff coming two years before you reach it, you can steer around it. If you can't, you drive right off the edge like Kenneth did.
Time your asset sales. If you're planning to sell a property or a concentrated stock position, model the MAGI impact across multiple tax years. Splitting a sale across December and January of two years can mean the difference between one year of surcharges and two.
What You Should Do This Week
Here's the practical version — what I'd tell you if you were sitting across my desk right now:
- Pull up your 2024 tax return. Find line 11 (your AGI) and line 2a (tax-exempt interest). Add them together. That's your MAGI, and it determines your 2026 Medicare premiums.
- Compare it to the threshold. For married filing jointly: $218,000. For single filers: $109,000. If you're close to either number — within $20,000 — you need to be managing your income deliberately.
- Model your 2025 income now. Whatever you earn, sell, convert, or distribute in 2025 determines your 2027 Medicare premiums. If you're planning a Roth conversion, a property sale, or any large financial event, run the IRMAA math before you execute.
- If you had a qualifying life event, file SSA-44. Don't wait. Download the form from SSA.gov or visit your local Social Security office. The worst they can say is no.
- If you're 70½ or older and making charitable gifts, switch to QCDs. Stop writing checks to your church or alma mater from your bank account and start directing those gifts from your IRA. The tax benefit is identical to you, but the MAGI impact is dramatically different.
- Review your Medicare premium notice every year. Don't just look at the bottom line — check which IRMAA tier you're in and trace it back to your income from two years ago. If something looks wrong, you have 60 days to contest it.
And while we're talking about Medicare, be careful about unsolicited calls claiming to be from Medicare or Social Security. I wrote recently about how to spot a Medicare scam in 2026 — the fraudsters are getting more sophisticated, and IRMAA confusion gives them another angle to exploit.
The Long View
IRMAA isn't a punishment. It's a planning problem. And like most planning problems, the cost of ignoring it is far higher than the cost of addressing it early.
Kenneth — the engineer with the rental property sale — came back to see me a month after that first visit. We went through his income projections for the next five years, mapped out his Social Security timing (I pointed him to my breakdown of the 2026 Social Security changes so he understood the full picture), modeled his RMDs, and built a MAGI budget the same way most people build a spending budget. He started QCDs. He scheduled his Roth conversions in $45,000 annual increments. He sold a small stock position in December 2025 instead of January 2026, keeping that gain in a year where his MAGI had room for it.
This year, Kenneth and Linda are back at the standard premium. $202.90 each. No surcharge. He told me it was the most satisfying bill he'd ever received.
You don't need to be wealthy to get hit by IRMAA — a single home sale or one aggressive Roth conversion can do it. But you also don't need to be a tax expert to avoid it. You need a CPA or financial planner who knows the brackets, a willingness to project your income a few years ahead, and the discipline to make financial decisions with Medicare premiums in mind.
The numbers aren't complicated. The planning takes some patience. But I've been doing this for 35 years, and I can tell you — the clients who get ahead of IRMAA never regret it. The ones who don't always wish they had.
