The Hidden Medicare Surcharge That Hits Retirees With Over $109,000 in Income
Many seniors who are 65 and over rely on Medicare to provide them with healthcare coverage, and with good reason. Medicare is available from the government regardless of your health status. It provides coverage for a broad array of services (typically without requiring pre-approval), and it usually comes with affordable premiums.
The keyword, there, however, is usually.
Medicare premiums for most seniors come in at $202.90 for Medicare Part B in 2026. However, some seniors will find themselves hit with an unexpected Medicare surcharge that they may not have been expecting — and that could have a serious impact on their finances. Here’s why these surcharges happen and what it could mean for you.
If your income is $109,000 or higher, you could face a surprise Medicare hit
The Medicare surcharge that you could find yourself surprised by results from something called the Income-Related Monthly Adjustment Amount, or IRMAA.
IRMAA causes your Medicare Part B and Medicare Part D premiums to increase dramatically once your income goes above a specific threshold. That threshold is $109,000 for single tax filers and $218,000 for married joint filers. However, while this is the threshold in 2026 that will send your Medicare premiums surging, it’s not your 2026 income that matters, or even your 2025 income.
The income that matters is your Modified Adjusted Gross Income (MAGI) from two years earlier. So, if your MAGI in 2024 was above those thresholds, then you’ll be faced with higher Medicare premiums in 2026. This can come as a shock, as you may not be aware that a year of higher-than-normal income due to something like capital gains from selling high-performing investments could end up being a ticking time bomb that causes your Medicare premiums to substantially increase two years later.
How much higher will your Medicare premiums go?
The increase in Medicare premiums that results once your income exceeds IRMAA thresholds can be extremely substantial. The table below shows how much you can expect to pay in monthly premiums based on your MAGI and the Income-Related Monthly Adjustment amount:
|
Full Part B Coverage |
|||
|---|---|---|---|
| Single tax filers with a MAGI that is: | or Joint tax filers with a MAGI that is: |
Will pay an IRMAA equal to: |
Bringing total Medicare premiums to: |
| Less than or equal to $109,000 | Less than or equal to $218,000 |
$0.00 |
$202.90 |
| Greater than $109,000 and less than or equal to $137,000 | Greater than $218,000 and less than or equal to $274,000 |
$81.20 |
$284.10 |
| Greater than $137,000 and less than or equal to $171,000 | Greater than $274,000 and less than or equal to $342,000 |
$202.90 |
$405.80 |
| Greater than $171,000 and less than or equal to $205,000 | Greater than $342,000 and less than or equal to $410,000 |
$324.60 |
$527.50 |
| Greater than $205,000 and less than $500,000 | Greater than $410,000 and less than $750,000 |
$446.30 |
$649.20 |
| Greater than or equal to $500,000 | Greater than or equal to $750,000 |
$487.00 |
$689.90 |
That means you could be looking at paying as much as $487 extra per month — and paying total premiums as high as $689.90 — because you had a year when your income was high. Of course, if you have many years of high earnings as a retiree, you could be hit with this surcharge for the entirety of your retirement during the years Medicare covers you.
What can you do about the IRMAA adjustments?

If you are subject to these adjustments to Medicare premiums because of your income, there’s not much you can do.
Your best bet is try to avoid having this happen in the first place by considering investing for retirement in a Roth IRA or 401(k) instead of a traditional account, and being careful about how large your withdrawals are or when you sell assets to limit capital gains.
A financial advisor can help you make a strategic plan to try to help you avoid sending your Medicare premiums skyrocketing, so you can keep more of your hard-earned funds in your accounts instead of sending extra money to Medicare.





