A 2024 Asset Sale Could Spike Your 2026 Medicare Premium by Hundreds a Month

A retiree posted on Reddit’s r/medicare in recent weeks, asking why her mother’s Part B premium notice for 2026 jumped by thousands of dollars after selling a long-held second home in 2024. The size of the increase was unexpected, and the income that triggered the surcharge had already been spent, taxed, and reinvested. The Medicare bill arrived two years later anyway.

This is the two-year lookback at work, a frequently overlooked mechanic in Medicare cost planning. Roughly 8% of Part B enrollees pay an Income-Related Monthly Adjustment Amount (IRMAA), so households whose 2024 modified adjusted gross income stayed well below the first threshold are unaffected. For everyone else, particularly anyone who sold a business, a rental property, a vacation home, or a concentrated stock position in 2024, the 2026 premium is already locked in based on income from a closed tax year.

How the Two-Year Lookback Sets the 2026 Bill

The Social Security Administration looks at your most recent tax return on file, which for 2026 premiums is the 2024 return, to decide whether a Part B and Part D surcharge applies. MAGI for IRMAA is adjusted gross income (Form 1040, line 11) plus tax-exempt interest (line 2a). Municipal bond income that feels tax-free still counts, and so do capital gains from selling appreciated assets.

The standard 2026 Part B premium is $202.90 a month, and the surcharges layer on top in tiers. For a joint filer, the brackets and totals look like this:

A Worked Example: The Sale That Lands in the Top Tier

Picture a married couple, both 70, with $150,000 in normal retirement income from Social Security, a pension, and modest IRA withdrawals. That income alone keeps them under the first IRMAA threshold. In 2024, they sold a rental property they had owned for 25 years. Counting basis and depreciation recapture, the taxable gain came to $650,000.

Their 2024 MAGI now runs roughly $800,000, which drops them into the top joint bracket for 2026.

Each spouse pays the standard premium plus a Part B IRMAA of $487.00 a month, for a total Part B bill of $689.90 a month. The Part D surcharge adds another $91.00 a month per person on top of the plan premium. Across the couple, the IRMAA alone runs about $13,870 for the year, on top of standard premiums and Part D plan costs.

Two structural points sit behind that number. First, the $250,000/$500,000 home-sale exclusion under IRC Section 121 applies only to a primary residence. A rental property, a vacation home, or a second home gets no exclusion, so the entire gain counts toward MAGI. A primary-home sale that nets below the exclusion does not trigger IRMAA at all, and a gain above the exclusion counts only to the extent it exceeds it.

Second, the surcharge tracks a single tax year of income. When the couple’s 2025 income returns to its normal $150,000, the 2027 premium falls back to the standard amount. The 2026 hit is large, but it lasts one year rather than attaching permanently to the premium.

Why SSA-44 Will Not Rescue a Voluntary Sale

Form SSA-44 lets a beneficiary ask the SSA to use more recent income to set IRMAA. It applies to a specific list of life-changing events: marriage, divorce or annulment, death of a spouse, work stoppage, work reduction, loss of income-producing property due to disaster or fraud, loss of pension income, and an employer settlement payment.

A voluntary asset sale is not on that list. So selling a rental property, executing a Roth conversion, or harvesting a concentrated stock position will not qualify, no matter how far the sale or conversion moves your household. File SSA-44 in those cases and you get a denial, not relief.

The survivor side matters too. When one spouse dies, the survivor begins filing single the following year. Single brackets start at $109,000 rather than the joint $218,000 entry point, so the same household income can newly trigger IRMAA or jump a tier. The bracket shifted while the income held constant.

What to Do Before the Next Sale

Three concrete actions follow from the mechanic.

• Map the sale year before you sign. Any sale of a non-primary residence, a business interest, or a large appreciated position this year flows into MAGI two years later. Project your 2026 or 2027 MAGI against the joint brackets ($218,000, $274,000, $342,000, $410,000, $750,000) before the closing date. Splitting a sale across two tax years, or timing it to a low-income year, can drop your household a full tier.
• Use SSA-44 only when the trigger qualifies. Work stoppage, retirement, death of a spouse, divorce, or loss of a pension are the events the form is built for. You file it within the year your income drops, with documentation of the event. A 2024 asset sale paired with a 2025 retirement can still win relief, but only because the retirement lowers the more recent year’s income the SSA can substitute, and the form must cite that work stoppage rather than the sale.
• Treat the surcharge as a one-year line item. A 2024 sale that lifted MAGI into a higher tier produces only a 2026 premium hit. Once 2025 income returns to baseline and shows up on the 2025 return, the 2027 premium resets. Plan the cash flow for the year the surcharge hits, not as a permanent premium assumption.

For households sitting within $20,000 of a bracket edge, a fee-only advisor who models Medicare costs alongside Roth conversion and withdrawal sequencing can show whether splitting a sale, harvesting losses, or shifting a conversion into the next tax year keeps you a tier lower. At the higher tiers, a single jump like the example couple’s can cost well over $5,000 per person for the year, while crossing the first threshold runs closer to $1,000.