My Medicare Part B Premium Jumped $21 in January — I Called SSA to Find Out Why

The Letter That Ruined My Saturday Morning

My name is Frank. I’m 68, I live in Mesa, Arizona, and until last June I was a systems engineer for a defense contractor outside of Phoenix. I retired on June 13, 2025 — a Friday, because my boss said nobody retires on a Monday — and I figured I had my finances mapped out the way I’d map a circuit board: every connection accounted for, every load balanced.

Then, on the second Saturday of January 2026, I pulled a letter from my mailbox that made me set down my coffee and call the Social Security Administration before 9 a.m. My new Medicare Part B premium wasn’t the $185 a month I’d been paying in 2025. It was $206.50. That’s the 2026 standard Part B premium — a $21.50 monthly increase that SSA announced last fall. Fine. I’d heard rumblings about that. But the letter also showed a second line item: an Income-Related Monthly Adjustment Amount — IRMAA — tacked on top. My total monthly Part B hit was now north of $290.

I stared at the number, did the subtraction, and realized the surcharge alone was $82.80 a month. Over a full year, that’s an extra $993.60 I hadn’t budgeted for. I needed to understand exactly why, and whether I could do anything about it.

Why the Standard Premium Rose to $206.50

Before I even get to the IRMAA problem, let me explain the baseline increase that hit every Medicare Part B enrollee in 2026. The standard monthly premium went from $185 in 2025 to $206.50 in 2026. CMS set that number based on projected Part B spending — physician services, outpatient care, durable medical equipment, and the growing cost of certain drugs administered in outpatient settings.

At the same time, the Part B annual deductible rose to $257 for 2026, up from $240 in 2025. So before Medicare pays a dime for my outpatient care each year, I’m covering the first $257 out of pocket. Frank here was already doing the math: $206.50 times 12 is $2,478 a year just in premiums, plus $257 in deductible, and that’s the baseline before any surcharge.

Now, the 2026 Social Security cost-of-living adjustment — the COLA — was 2.5%, effective January 2026. For the average retired worker receiving about $1,976 a month, that COLA added roughly $49. For me, my benefit is a bit higher because of my engineering salary history, but the point is this: the Part B premium increase ate a meaningful chunk of my COLA raise before it ever hit my bank account. That’s the quiet frustration nobody warns you about when you’re planning retirement from a cubicle.

The IRMAA Surcharge: What $108,200 in MAGI Actually Costs

Here’s where my story gets specific — and where I spent 47 minutes on hold with SSA on January 12, 2026.

IRMAA is Medicare’s way of charging higher-income beneficiaries more for Part B (and Part D). The brackets are based on your modified adjusted gross income from two years prior. So my 2026 premiums are determined by my 2024 tax return. In 2024, I was still working full-time. My salary, a small amount of interest income, and a required minimum distribution from a rollover IRA I inherited from my father pushed my MAGI to $108,200.

The first IRMAA threshold for a single filer in 2026 is $106,000. I crossed it by $2,200. Two thousand two hundred dollars. That’s it. And because IRMAA brackets are cliff-based — not graduated like income-tax brackets — crossing that line by even a single dollar means you pay the full surcharge for that tier. In my case, that meant an additional $82.80 per month on top of the $206.50 standard premium, bringing my total Part B premium to $289.30 a month.

Frank was not happy. I asked the SSA representative, a very patient woman named Denise, whether there was any rounding, any grace zone, any way to argue that $2,200 over the line shouldn’t count. There isn’t. She was kind about it, but the rules under 42 CFR § 408.20 and the Social Security Act § 1839(i) are mechanical. Your MAGI is your MAGI.

The Two-Year Lookback That Catches New Retirees

This is the part I wish someone had explained to me in 2023, when I was still planning my exit. The two-year lookback means that in your first year or two of retirement — when your income has likely dropped significantly — you’re still being charged based on your peak working-year income. In 2026, I’m living on Social Security plus modest IRA withdrawals. My 2026 income will probably be around $62,000. But Medicare doesn’t care about 2026 income right now. It’s looking at 2024, when I earned $108,200.

Denise told me there is a process to request a reduction. It’s called a Life-Changing Event appeal, and you file it using SSA Form SSA-44. Qualifying events include retirement, marriage, divorce, death of a spouse, work reduction, and a few others. Retirement counts. I filed my SSA-44 on January 19, 2026, a Monday — apparently I do important paperwork on Mondays after all — and attached a letter from my former employer confirming my retirement date of June 13, 2025, plus my 2025 estimated income documentation showing that my income had dropped well below $106,000.

Denise said processing typically takes a few weeks to a few months. If approved, SSA would adjust my premium retroactively to January 2026 and refund the IRMAA surcharges that had already been deducted from my Social Security checks. I’m cautiously optimistic.

What This Actually Costs Over a Full Year

Let me lay out the numbers because they’re the kind of thing that doesn’t feel real until you see them side by side.

If I were paying the standard 2026 Part B premium with no IRMAA, my annual cost would be $206.50 × 12 = $2,478, plus the $257 deductible, for a total of $2,735 before I even see a doctor.

With the IRMAA surcharge at the first tier, I’m paying $289.30 × 12 = $3,471.60, plus the $257 deductible, totaling $3,728.60. That’s an extra $993.60 a year — almost a thousand dollars — because my 2024 MAGI was $2,200 over the line.

Frank did what any engineer would do: I built a spreadsheet. I modeled what would have happened if I’d contributed an extra $2,200 to my 401(k) in 2024 — which I easily could have, since the 2024 catch-up limit for someone my age allowed total deferrals well above what I was putting in. That single move would have dropped my MAGI to $106,000 or just below, eliminating the entire IRMAA surcharge. A $2,200 deferral saving me $993.60 in Medicare surcharges the following year. The math haunts me.

For 2026, the 401(k) deferral limit is $24,500 with an additional $8,000 catch-up for those 50 and older — and a super catch-up of $11,250 for those aged 60 to 63. I’m 68, so the super catch-up doesn’t apply to me, but if you’re in that window, the ability to defer up to $35,750 into a 401(k) is a powerful MAGI-reduction tool. I tell every friend who will listen.

The Tax Side: What I Can Actually Deduct

One small consolation: Medicare Part B premiums — including the IRMAA surcharge — count as a medical expense for federal tax purposes. Under IRC § 213(a), you can deduct unreimbursed medical expenses that exceed 7.5% of your adjusted gross income. For 2025 returns filed by April 15, 2026, and for 2026 returns the following year, the threshold remains 7.5%.

With a 2026 standard deduction of $15,750 for a single filer — plus the additional standard deduction for being over 65 — I have to run the numbers to see whether itemizing makes sense. For Frank, the honest answer is it probably doesn’t, because my medical expenses alone won’t clear the 7.5% AGI floor and then exceed the combined standard deduction. But I’m tracking every dollar just in case, because a surprise surgery or dental procedure could tip the balance.

Arizona, for what it’s worth, has a flat state income tax of 2.5%, so my state burden is manageable. But I sometimes look at the list of nine states with no income tax — Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming — and wonder if my spreadsheet would look different with a Boca Raton zip code.

What I’d Tell Another Just-Retired Engineer

I’m not a financial advisor, and I’m not going to pretend that what worked — or didn’t work — for Frank applies to everyone. But here’s what I know now that I wish I’d known two years ago:

• The two-year MAGI lookback is real and unforgiving. If you’re planning to retire, your last full working year’s income will determine your Medicare premiums two years later. Plan accordingly.
• IRMAA brackets are cliffs, not slopes. Going $1 over $106,000 as a single filer costs the same surcharge as going $20,000 over. Check your projected MAGI in October or November of each year, while you still have time to make adjustments — extra 401(k) contributions, charitable donations, HSA contributions if you’re eligible.
• File SSA-44 immediately if you’ve had a life-changing event. I filed mine on January 19, 2026, and I’m waiting. The form is straightforward, but you need documentation — an employer letter, a pension statement, something that proves the income change. Don’t wait until March hoping the problem solves itself.
• Track your Part B premiums as a medical expense. Even if you take the standard deduction this year, a high-medical-cost year could make itemizing worthwhile, and you’ll want records.

Frank is sitting in Mesa, watching the mail, waiting for SSA to process his SSA-44. The $21.50 standard premium increase I can live with — that’s the cost of the system. It’s the $82.80 IRMAA surcharge, triggered by $2,200 I could have easily sheltered, that keeps me up at night. Not because the money will ruin me, but because the math was right there, and I didn’t do it.

If you’re 64, 65, 66 and still working — run the numbers now. Future you will be grateful.