A retired couple in their late 60s closes on the sale of a longtime rental property in 2024. After taxable gain and any depreciation recapture, their modified adjusted gross income for that tax year comes in above $330,000. They pay the federal tax bill and move on. Then, in 2026, each spouse’s Medicare Part B premium jumps by more than $200 a month. If part of the sale is also taxable in 2025, such as through an installment note, the surcharge can repeat through 2027. That is the delayed Medicare cost many sellers never price into the deal.
Only about 8% of Part B enrollees pay IRMAA, and the 2026 surcharge starts when MAGI exceeds $218,000 for joint filers or $109,000 for single filers. But a single asset sale can pull an otherwise middle-income retiree into higher Medicare brackets for a year or two, and that is the mechanic worth understanding before signing closing documents.
The two-year lookback, and why it can feel like 24 months
Medicare’s Income-Related Monthly Adjustment Amount uses the tax return from two years prior. Your 2024 return drives your 2026 premium; your 2025 return drives 2027. One tax year of spiked income creates one 12-month cycle of surcharges, arriving two years later, once you’ve likely forgotten the transaction.
The 24-month problem can show up when a rental sale straddles tax years. Installment sales under IRC Section 453 generally spread eligible gain across the years payments arrive, unless the seller elects out. But depreciation recapture is generally taxable in the year of sale, even if payments arrive later. If MAGI is elevated in both 2024 and 2025, the IRMAA surcharge can land in both 2026 and 2027. Two full years of “wealthy” status on the Medicare bill, from one transaction.
MAGI for IRMAA is Form 1040 line 11 (adjusted gross income) plus tax-exempt interest from line 2a. That municipal bond income you thought was tax-free counts here, and it can be the difference between clearing a bracket and landing above it.
What the surcharge actually costs
Take a couple with baseline MAGI around $180,000 from Social Security, pensions, dividends, and some rental income. The property sells and MAGI jumps to $330,000 for that year. That lands in the $274,000.01 to $342,000 joint bracket. In 2026, each spouse’s Part B premium climbs from the standard $202.90 to $405.80. Each spouse also owes a $37.50 Part D surcharge on top of whatever the drug plan charges. Household cost above baseline: $5,769.60 for the year. If taxable sale income straddled two tax years at the same tier, the extra Medicare cost would be roughly $11,500 across the two-year cycle.
Higher tiers get worse quickly. A joint MAGI of $750,000 or more puts each spouse’s Part B premium at $689.90 per month and adds a $91.00 Part D surcharge. That is roughly $13,872 of extra Medicare cost for one household for one year.
The SSA-44 trap
Many sellers assume Form SSA-44 will unwind the surcharge. Usually, it will not. SSA-44 is for cases where income went down after a qualifying life-changing event, such as marriage, divorce or annulment, death of a spouse, work stoppage, work reduction, loss of pension income, loss of income-producing property, or an employer settlement. SSA specifically says loss of income-producing property does not include a sale or transfer at your direction. A voluntary sale of an appreciated rental generally does not qualify, no matter how much it raised MAGI. The same is generally true for Roth conversions.
Worth naming separately: the survivor trap. If one spouse dies during or after the sale year, the survivor may file single in a later year. Single brackets are roughly half the joint thresholds at the lower tiers, so income that fit into one tier for a couple can land higher for a widow or widower. The income may be similar, but the threshold is smaller.
What to do before you sell
- Model the MAGI year first. Add the expected taxable gain and any depreciation recapture to your normal AGI, then add tax-exempt interest, and check which IRMAA tier the sum lands in. If you are within $20,000 of a bracket, timing may matter.
- Consider an installment sale intentionally, not accidentally. Spreading eligible gain across two or three years can keep each year’s MAGI inside a lower tier, cutting the IRMAA cost even though it stretches the surcharge window. But depreciation recapture generally hits in the year of sale, and installment notes carry their own credit and tax risks. Run both scenarios in dollars before you decide.
- Time the closing. If the sale will land you in a top IRMAA tier regardless, one big income year may be better than two medium ones. If a bracket jump is avoidable, moving a late-December closing into January may shift the taxable event into the next Medicare lookback year. The right answer depends on whether the goal is to compress the surcharge into one year or spread taxable gain across lower tiers.
Medicare does not remember forever. Once the high-income sale year drops out of the lookback and later MAGI falls below the IRMAA threshold, Part B can return to the standard premium.
Sources: CMS 2026 Medicare Parts A & B Premiums and Deductibles fact sheet; SSA Form SSA-44 instructions; SSA POMS guidance on MAGI; IRS Publication 537 on installment sales; IRS Publication 544 on depreciation recapture. Figures reflect the 2026 plan year.
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