Selling a home you’ve owned for decades can hand you a big profit, and a surprise Medicare bill two years later. Here’s how selling your home affects your Medicare premiums, and the simple tax rule that can shrink the damage.
A large gain on a home sale can push your income high enough to trigger a Medicare surcharge that costs thousands of dollars. The good news is that most of it is avoidable if you understand the rules before you sell. Let’s walk through how this works, then the two moves that bring the cost down.
Why selling your home can raise your Medicare premiums
Most people don’t connect a one-time home sale with their monthly Medicare premium. But they’re linked through a rule called IRMAA, the Income-Related Monthly Adjustment Amount. It’s a surcharge added to your Medicare Part B and Part D premiums when your income climbs above certain lines.
The income IRMAA looks at is your modified adjusted gross income, or MAGI. And MAGI includes your capital gains, which is the profit from selling your home. So a big gain in one year can push your MAGI far above normal, even though it’s a one-time event and not really your regular “income.”
One more twist: IRMAA looks back two years. Your 2026 premium is based on your 2024 tax return. So a home you sold in 2024 can raise your Medicare bill in 2026, long after the closing.
A real example: a $614,000 gain
Say you bought a home decades ago for $175,000 and recently sold it for $789,000. That’s a $614,000 profit. (The original price is your “basis.” The gain is the sale price minus the basis.)
Now add a normal retirement income of, say, $68,100. Your MAGI for that year jumps to about $682,100. As a single filer, that lands you in the very top IRMAA tier. Two years later, your Part B premium climbs from the standard $202.90 a month to $689.90. That’s $487 more per month, or $5,844 for the year, just in Part B.
How big can the surcharge get in 2026?
IRMAA is a cliff, not a gentle ramp. Cross a line by a single dollar and you owe the full surcharge for that whole tier.
For a single filer, the first surcharge kicks in above $109,000 of MAGI. At the very top (over $500,000), the Part B surcharge alone is $487 a month. There’s also a separate Part D drug surcharge that runs up to $91 a month. Add them together and a single person at the top tier pays about $6,936 extra for the year. For a married couple at the top tier (over $750,000), both spouses owe it, so the damage is roughly $13,872 in a single year.
That’s the worst case. But even landing in a middle tier can cost a couple a few thousand dollars. The point isn’t the maximum, it’s that a large home gain usually triggers some surcharge.
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The fix: the home-sale tax exclusion
Here’s the good news. The tax code lets you exclude a big chunk of your home-sale gain from your income, which keeps it out of your MAGI. It’s called the Section 121 exclusion, and it’s worth up to $250,000 of gain if you’re single, or $500,000 if you’re married filing jointly.
To qualify, you generally must meet these rules:
- The home is your primary residence, not a rental or vacation property.
- You owned it for at least 2 of the last 5 years.
- You lived in it for at least 2 of the last 5 years.
- You haven’t used this exclusion on another home in the last 2 years.
For a married couple, either spouse can meet the ownership test, but both must meet the live-in test, and neither can have used the exclusion in the past two years.
In our example, a married couple could exclude $500,000 of the $614,000 gain, leaving only $114,000 counted. That alone could drop them several IRMAA tiers.
Shrink the gain even more: raise your basis
You can lower the taxable gain further by raising your basis. Your basis starts as what you paid for the home, but it grows with the major improvements you made over the years. A new roof, a new heating and cooling system, an addition, or a renovated kitchen all add to your basis.
The key is that it has to be a lasting improvement, not routine maintenance like repainting or fixing a leak. The higher your basis, the smaller your gain, and the smaller the hit to your MAGI. So dig out the records and receipts for those big projects.
A few important caveats
Keep a few things in mind. First, your own gain may be far smaller than this example, especially away from the high-cost coasts, so your surcharge could be smaller too. Second, IRMAA applies no matter how you get your coverage, whether that’s Original Medicare, a Medigap plan, or a Medicare Advantage plan. And third, if your income later drops because of a life change like retirement or the loss of income-producing property, you can ask Social Security to reduce your IRMAA by filing Form SSA-44.
The bottom line
Selling a long-held home can be one of the biggest financial events of your retirement, and it can raise your Medicare premiums two years later through IRMAA, often when you least expect it. The fix is to plan before you sell: use the Section 121 exclusion, raise your basis with the improvements you’ve made, and, where you have flexibility, think about the timing of the sale.
Because the cost shows up two years after the sale, it helps to run the numbers ahead of time, ideally with a plan or tool that shows how a big gain ripples into your future taxes and Medicare premiums, before you sign at the closing table.
This is educational information, not personal tax or financial advice. The rules and dollar figures here are current for 2026 but change, and the home-sale exclusion has specific requirements, so confirm your situation at IRS.gov, at Medicare.gov, or with a qualified tax professional before you sell.
Chapter Advisory, LLC (“Chapter”) is a private health insurance agency. In California, Chapter does business as Chapter Insurance Services (Lic. No. 6003691). Chapter is not affiliated with or endorsed by any government entity. While Chapter has a database of every Medicare plan option nationwide and can help you to search among all options, it has contracts with many but not all plans. As a result, Chapter does not offer every plan available in your area. Currently, Chapter represents 50 organizations which offer 18,601 products nationwide. You can contact a licensed Chapter agent to find out the number of products available in your specific area. Please contact Medicare.gov, 1-800-Medicare, or your local State Health Insurance Program (SHIP) to get information on all of your options. Enrollment in a plan may be limited to certain times of the year unless you qualify for a Special Enrollment Period or you are in your Medicare Initial Enrollment Period.
Average potential savings are based on realized premium, co-pay, and out of pocket savings estimates self-reported by consumers that worked with Chapter Advisory LLC to enroll in a Medicare Supplement, Medicare Advantage, and/or Part D Prescription Drug Plan. The average is limited to consumers that chose to self-report. Savings information is subject to periodic updates and corrections. There is no guarantee of savings and any savings may vary by policy type, state, or other factors.
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