He Retired From the Refinery on December 31. Closing on the House Two Days Earlier Put the Gain on His Last Full Salary and Raised Both Medicare Bills
A retired refinery foreman and his wife moved their home closing up by one day to finish before the new year, not realizing that single scheduling decision would follow them into Medicare billing two years later.
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A 68-year-old refinery foreman worked his last shift on December 31. He and his wife were already on Medicare. They had also sold their longtime home, and they pushed the closing up to December 30 so the move would be finished before year-end. That choice put a $120,000 taxable gain on the same tax return as his last full salary.
A taxable home-sale gain can raise Medicare premiums two years later, generally for one premium year. The sale alone does not qualify for relief from the income-related monthly adjustment amount, or IRMAA. Retirement can.
CMS says income-related surcharges hit about 8% of Part B enrollees. A couple with joint MAGI at or below $218,000 pays the standard $202.90 monthly Part B premium. The risk falls on households where a large one-time gain lands in the same year as wages.
How One Week Moved the Gain Into a Different Tax Year
The return for the year of closing generally shows the home sale. After accounting for adjusted basis, selling costs and a $500,000 home-sale exclusion they qualified for, this sale left $120,000 of taxable gain. For IRMAA, Social Security uses MAGI, which adds tax-exempt interest to adjusted gross income. Paying off the mortgage, buying the next house or giving proceeds to the kids leaves that gain in MAGI.
| Closing Date | Other Joint MAGI | Taxable Home Gain | Total Joint MAGI |
|---|---|---|---|
| December 30 | $180,000 | $120,000 | $300,000 |
| January, one week later | $80,000 | $120,000 | $200,000 |
The gain is the same in both rows. The closing date only decides which return reports it.
What a $300,000 Return Costs Two Medicare Enrollees
Joint MAGI of $300,000 falls in the 2026 bracket above $274,000 through $342,000, which is the second tier.
| Scenario | Part B Surcharge (Per Spouse, Monthly) | Part D Surcharge (Per Spouse, Monthly) | Total Surcharge (Household, Annual) |
|---|---|---|---|
| December closing | $202.90 | $37.50 | $5,769.60 |
| January closing | $0.00 | $0.00 | $0.00 |
For each spouse, that comes to $2,434.80 a year for Part B and $450 for Part D, or $2,884.80 in total. The January scenario sits $18,000 under the first threshold. Even if they had pushed the December return down to $274,000, they would still owe the first-tier surcharge: $81.20 for Part B and $14.50 for Part D, per spouse, per month.
This illustration uses 2026 rates, assumes both spouses have Part B and Part D, and shows surcharges before any retirement adjustment. Actual 2028 and 2029 thresholds and surcharges may differ.
Social Security generally uses income from two years before the premium year. A December 2026 closing feeds into 2028 premiums; January 2027 feeds into 2029. Without an adjustment, the December sale could raise their premiums long after the refinery paycheck stops.
Where SSA-44 Helps, and Where It Stops
A voluntary income event like a home sale never counts as a life-changing event on Form SSA-44. Retirement is different. Stopping work is a qualifying life event, so the form is worth a close look. It requests that a newer, lower estimate of MAGI replace the old return.
Here, his retirement could let Social Security use their lower 2027 income and remove the surcharge. The December gain stays on the 2026 tax return, but that return would no longer set their premiums if Social Security approves the adjustment (IRMAA is one of several premium traps we mapped in a free Medicare guide if you want the full list before your next filing year).
Run the Return Both Ways Before You Sign
- Model two closing dates. Before you accept a year-end closing, have your tax preparer run the return with a December closing and again with a January closing. Include your gain, both spouses’ Part B and Part D surcharges, and any income that changes once you retire.
- If you already closed in December, each spouse should request relief. File SSA-44 citing his work stoppage, with retirement documentation and the newer year’s joint MAGI, including pensions, taxable withdrawals and any gains.
- Ask whether the buyers can wait a week. Compare the cost of delaying the closing with the potential tax and Medicare savings.
The gain would be the same. One week decides whether it lands on top of a full refinery salary or a retiree’s income.
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Gerelyn Terzo is the author of dividend investing handbook "Dividend Investing Strategies: How to Have Your Cake & Eat It Too." A veteran financial journalist, she covers agri-finance for outlets like Global AgInvesting and the broader stock market and personal finance for 24/7 Wall Street. She began at CNBC and later helped launch Fox Business in New York. Gerelyn currently resides in Woodland Park, Colorado and dabbles in nature photography as a hobby.
