IRMAA After a Property Sale: The 2-Year Medicare Lookback

This is one of the costs covered in beyond the tax bill: the charges a sale triggers that never show up on the capital gains line of your return.

How does the 2-year lookback work?

The statute uses your modified adjusted gross income (MAGI) for "the second calendar year preceding the year involved" (42 USC 1395r(i)(4)(B)(i)). The Social Security regulation says the same thing: your premiums for a year are based on the "tax year 2 years prior to the effective year" (20 CFR 418.1135(a)). If the IRS does not yet have that return, SSA uses the return from three years prior and corrects it later (418.1135(b)).

So:

• A sale that closes in 2026 sets your 2028 premiums.
• A sale that closes in January 2027 sets your 2029 premiums.
• The surcharge comes out of your Social Security check long after escrow closes.

MAGI for IRMAA is your adjusted gross income plus tax-exempt interest (1395r(i)(4)(A)). The whole taxable gain is in AGI, and so is the interest on municipal bonds you might buy with the proceeds. Moving money into tax-free bonds does not lower IRMAA MAGI. (More on how gains feed the tiers: capital gains and IRMAA.)

What are the 2026 IRMAA tiers?

From the CMS 2026 fact sheet. Amounts are monthly, per person.

Three details matter for a seller:

• IRMAA is per person. A married couple files one joint return, but each spouse on Medicare pays the surcharge. At the top tier that is $578 a month each ($487.00 plus $91.00), or $13,872 a year for the couple.
• The top line is fixed for now. The $500,000 and $750,000 amounts are excluded from inflation indexing and start indexing only for years after 2027, from an August 2026 base (1395r(i)(5)(C)). The lower lines are indexed by CPI every year.
• $1 over a line is over. The lower tiers start at "greater than" the threshold, and the top tier starts at "greater than or equal to" $500,000 / $750,000. In the engine, a couple at $218,000 of MAGI pays no IRMAA; at $218,003 they pay $1,148.40 each for the year, $2,296.80 together. Three dollars of income, about $2,300 of premium.

Can you appeal IRMAA after selling property?

Usually not. SSA will use a more recent, lower year only after a "major life-changing event" listed in 20 CFR 418.1205, reported on Form SSA-44. The list: death of a spouse, marriage, divorce or annulment, you or your spouse stopping work or reducing hours, loss of income-producing property, loss of pension income from a plan's termination or reorganization, and an employer settlement after closure or bankruptcy. Nothing else counts (418.1210).

The property item is narrow. It covers a loss "not at the direction of you or your spouse (e.g., due to the sale or transfer of the property)" and not "a result of the ordinary risk of investment": a declared disaster, arson, or fraud or theft by a third party. SSA's own manual (POMS HI 01120.005) lists "Voluntary sale of income-producing property" as a non-qualifying event, and separately lists "Capital gains from the sale of property" among one-time income spikes that do not qualify (along with IRA conversions, which is why a Roth conversion runs into the same wall).

There is one related fix. If the return SSA used was wrong and you amend it, you can submit the amended return for a tax year SSA used within three calendar years after the close of that tax year (20 CFR 418.1150). That corrects an error. It does not undo a real gain.

What does a cash sale cost versus a spread?

A cash sale usually means one top-tier year. A spread over many years (a structured installment sale under IRC §453) usually means lower tiers, but more of them. Here are two engine runs using 2026 law, with IRMAA counted as the with-sale premium minus the no-sale premium. Both paths earn 5% on money at work (the cash seller on invested after-tax proceeds, the installment seller on payments), and that yield counts as income each year.

Couple, both 65+ and on Medicare. California, $2,000,000 sale, $500,000 basis, $120,000 selling costs, $120,000 of other income. Cash in 2026 versus a 20-year spread.

The spread costs $82,013 more IRMAA and saves $185,614 of income tax. Net, the spread comes out about $103,600 ahead in this example, but the IRMAA line moves the wrong way.

Single seller, 66. California, $1,500,000 sale, $400,000 basis, $90,000 selling costs, $40,000 of other income, $30,000 of Social Security. Cash versus a 10-year spread.

Here the spread costs about $42,800 more IRMAA and saves $128,345 of income tax, so it still comes out about $84,600 ahead after both beyond-the-bill costs. (The Social Security side is its own article: taxes on Social Security after a sale.)

The honest read: in both examples, spreading costs more IRMAA than selling for cash, and saves far more income tax than it adds in premiums. Do not assume a spread fixes Medicare. It usually trades one big year for many smaller ones.

A caution on the projection: the engine holds the 2026 CMS tiers flat for later premium years. The lower lines are indexed each year, so the later-year tier hits above are probably somewhat overstated.

How do you design a spread around the tier lines?

The lever is the size of each year's income, set by the payment amount and the term you choose before closing. Look at where the engine rows land:

• Couple, income year 2031: MAGI of about $277,459, which is $3,459 over the $274,000 line. That puts them in tier 2 instead of tier 1 for the premium year, $5,770 instead of $2,297 for the couple: about $3,470 of premium for a few thousand dollars of income.
• Single seller, income year 2027: MAGI of about $216,098, which is about $11,100 over the $205,000 line. Tier 3 would cost $4,620 a year instead of $6,355, a difference of about $1,735 a year for ten years.

What moves the number:

1. Payment size and term. A longer term or a smaller annual payment lowers each year's gain and interest. Test it: the pillar run for a near-identical single seller over 20 years shows $109,752 of IRMAA for the spread against $51,328 for cash over the same 20 years, while income tax falls from $324,498 to $141,405. More years of payments means more years exposed to a surcharge. Longer is not automatically better for IRMAA.
2. Your other income. Pension, required IRA distributions, Roth conversions and investment yield all stack on top of the payments. Growth in any of them pushes a year over a line, which is what happened in 2031 above.
3. Timing of the close. December versus January decides which premium year takes the hit, and whether a year you already expected to be high absorbs it.

The target is a year that sits just under a line, not just over it. Given the $3 lesson above, leave a margin; your CPA can project MAGI before each year closes.

What should you know about the structured sale itself?

You pick the schedule before closing, and the buyer pays in full at closing to an assignment company that funds your payments with an annuity from a highly rated life insurer. What to know: the payments are locked in once set; they depend on the assignment company and the insurer behind it; there is no published IRS ruling on this specific assignment structure, so have your CPA review it; and a commission is built into the pricing. See what a structured installment sale is.

Frequently asked

Q: Which year's income sets my 2028 Medicare premiums? A: Your 2026 tax return. IRMAA uses MAGI from two years before the premium year (20 CFR 418.1135(a)).

Q: Does a one-time capital gain count toward IRMAA? A: Yes. The gain is in AGI, and IRMAA MAGI is AGI plus tax-exempt interest. There is no exclusion for one-time income.

Q: Can I file Form SSA-44 because I sold a rental property? A: Not for a voluntary sale. POMS HI 01120.005 lists both the voluntary sale of income-producing property and capital gains from a sale as non-qualifying events.

Q: If my spouse is not on Medicare yet, do we both pay? A: No. IRMAA is charged per person on Medicare, though the tier is set by your joint MAGI.

Q: Does an installment sale always lower IRMAA? A: No. In the engine examples on this page it raised total IRMAA while cutting income tax by much more. It lowers IRMAA only when the annual income is sized under a tier line.

What should you read or run next?

• Beyond the tax bill: every cost a sale triggers
• The calculator: its "Beyond the tax bill" slide shows IRMAA by year for cash and spread
• Net investment income tax
• How seniors can pay $0 federal capital gains
• Roth conversions in an installment sale
• Capital gains exit calculator

Illustrative estimates using 2026 law. Not tax, legal or accounting advice. Figures change each year; have your CPA confirm with your own return.

Who wrote this?