One extra penny
can cost you thousands.
IRMAA is a Medicare surcharge that kicks in the moment your income crosses a threshold and it doesn't ease in. It jumps! Understanding it is the first step to protecting your retirement.
5+
Income tiers that
trigger surcharges
$487
Max monthly Part B
surcharge in 2026
2yr
Lookback period used
to calculate your bill
What exactly is IRMAA?
The acronym sounds complicated. The concept is straightforward, and the financial impact is very real.
It is a surcharge, not a tax
IRMAA is added directly on top of your standard Medicare Part B and Part D premiums each month. It does not go to the IRS. It goes to Medicare.
It is based on income from two years ago
The Social Security Administration uses your tax return from two years prior to calculate what you owe today. This lag surprises many new retirees who did not expect their pre-retirement income to affect their Medicare bill.
It scales with your income in tiers
There are five income brackets above the base threshold. The higher your income, the higher your surcharge. The top tier significantly increases your monthly Medicare cost beyond what most retirees plan for.
In plain terms: if your income exceeds a certain level, Medicare charges you more for coverage each month. That extra charge is the IRMAA.
For 2026, surcharges apply to Medicare Part B and Part D. They are determined by the Social Security Administration and automatically deducted from your Social Security benefit, or billed directly if you do not receive Social Security.
The stakes are higher
than most people realize.
IRMAA is not a small line item. For many retirees, it represents one of the largest unplanned expenses in retirement. It is made worse by the fact that it often comes as a complete surprise.
Maximum annual surcharge
A single Medicare beneficiary in the highest income tier can pay as much as this per year in Part B alone, on top of standard premiums. That is real retirement income disappearing each year.
The cliff that changes everything
Earn one penny over an IRMAA threshold and you jump to the next surcharge tier entirely. There is no gradual increase. It is an abrupt cliff that can cost you thousands with a single penny of extra income.
The lookback that blindsides retirees
Your 2026 surcharge is calculated from your 2024 income. A high-earning year from before you retired, whether a bonus, a Roth conversion, or an asset sale, can follow you directly into Medicare.
The Married Filing Separately trap
Married couples who file separately face a brutal IRMAA shortcut. At just $109,000.01 in income, a Married Filing Separately beneficiary jumps straight to Tier 4, a surcharge most joint filers would not hit until $410,000.
All figures cited are for educational purposes only and reflect 2026 Medicare data. This is not financial or legal advice.
How the two-year lookback
actually works.
The mechanics of IRMAA involve a timeline that catches many people off guard. Here is how your past income flows into your current Medicare bill.
You file your taxes
Your Modified Adjusted Gross Income (MAGI) is recorded in your 2024 federal tax return, filed in early 2025.
SSA reviews your income
The Social Security Administration receives your income data from the IRS and determines your IRMAA bracket for the year ahead.
CMS announces new brackets
Each fall, Medicare announces updated IRMAA thresholds and surcharge amounts for the following year, adjusted for inflation.
Your bill arrives
Your 2026 Medicare premiums reflect your 2024 income. A notice from SSA tells you which bracket you are in and what you will pay.
The 2026 Lookback at a Glance
Income from two years ago determines today's premium.
Why does the lookback exist?
The IRS only shares finalized tax data with the SSA after returns are fully processed. This creates an unavoidable delay, meaning Medicare always operates on a two-year lag. This is by design, not by error.
The practical implication: the financial decisions you make today will affect your Medicare premiums in two years. Strategic planning now can reduce or even eliminate your IRMAA in the future.
Who is affected?
IRMAA applies to Medicare beneficiaries enrolled in Part B and/or Part D whose income exceeds specific thresholds. Here are the situations that most commonly trigger it.
High-earning pre-retirees
If you earned significant income in the two years before enrolling in Medicare, whether from salary, bonuses, stock options, or business income, that income may follow you into your first years of Medicare coverage.
Most commonly affectedRoth conversion planners
Converting a traditional IRA to a Roth IRA creates a taxable event that increases your MAGI for that year and can push you into a higher IRMAA bracket two years later. Timing is critical, and many people get it wrong.
Common planning mistakeInvestors with capital gains
Selling appreciated assets, including stocks, real estate, or a business, can spike your MAGI significantly in the year of the sale, even if your regular income is modest. This often triggers unexpected IRMAA surcharges two years later.
One-time event impactRetirees with large RMDs
Required Minimum Distributions from traditional IRAs and 401(k)s count toward your MAGI. As account balances grow, RMDs can push retirees over IRMAA thresholds even without any change in their lifestyle or spending habits.
Ongoing exposureKnow exactly where
you stand today.
The IRMAA Report gives you a personalized breakdown of your estimated surcharge exposure based on your income profile. No surprises when Medicare bills you.
For informational and educational purposes only. Not financial advice.
Your estimated IRMAA bracket based on current year income inputs
Part B and Part D surcharge estimates for your specific income tier
Two-year lookback analysis showing which income years are affecting you now
Educational summary of your exposure to explore with your advisor
And much more!
Your IRMAA Report
Educational Summary: 2026
Instant delivery · Educational use only · Not tax advice
Common questions, clear answers.
IRMAA generates a lot of confusion. Here are the questions we hear most, answered plainly.
Don't wait for the
bill to arrive.
Understanding your IRMAA exposure before it happens is the most valuable thing you can do. Get a personalized educational report and stop guessing.
This report is for educational purposes only and does not constitute financial, tax, or legal advice. Please consult a qualified professional for guidance specific to your situation.