The Beach Condo Bought for $110,000 in 1998 Sold for $640,000. There’s No Exclusion on a Second Home, and Medicare’s Bill Comes Two Years Later.
They tracked every summer rental, every repair, every carrying cost on that beach condo for nearly three decades. What they never tracked was the Medicare bill that showed up two years after closing.
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A couple in their late 60s bought a beach condo in 1998 for $110,000. They rented it for a few weeks each summer, used it themselves the rest of the time and never made it their primary residence. In spring 2026, they sold it for $640,000. The capital gain will appear on the return they file in 2027. Medicare’s bill follows in 2028, and that is the cost they never put into the closing statement.
The federal capital-gains bill arrived when they filed their 2026 return. The Medicare bill arrived in 2028, and that was the one they never put into the closing statement. Only about 8% of Part B beneficiaries pay an income-related monthly adjustment amount (IRMAA) in a typical year. A large, one-time gain can move a household into that group for a full premium year.
Why the Second Home Has No Exclusion
Section 121 of the tax code allows eligible homeowners to exclude as much as $250,000 of gain, or $500,000 for a married couple filing jointly, from the sale of a principal residence. A vacation property that never became the couple’s main home does not qualify. The raw appreciation here is $530,000, but that is not automatically the taxable gain. Purchase expenses, eligible capital improvements and selling costs can raise the property’s basis or reduce the amount realized.
The rental history moves the calculation in the opposite direction. Depreciation allowed or allowable during the rental periods reduces basis, even if the couple failed to claim every deduction. The portion of gain attributable to that depreciation may be taxed at a maximum 25% rate. Suppose improvements and selling costs are largely offset by the depreciation adjustment, leaving a taxable gain near $530,000. That gain enters adjusted gross income and, from there, the modified adjusted gross income (MAGI) Medicare uses to set premiums.
Medicare Reads the Return Two Years Later
Medicare generally uses tax information from two years earlier. A sale completed in 2026 therefore affects Part B and Part D premiums in 2028. Assume the couple normally reports about $85,000 of MAGI from taxable Social Security, pensions, retirement-account withdrawals and dividends. Add a $530,000 condo gain, and their income for the year approaches $615,000.
For IRMAA, MAGI generally means adjusted gross income plus tax-exempt interest. Municipal-bond income that avoids federal income tax still appears in the Medicare calculation. The 2028 brackets and premiums are not available yet. Using the published 2026 schedule as a reference, joint MAGI above $410,000 but below $750,000 falls into the second-highest tier. The eventual 2028 thresholds and dollar amounts will differ, but the two-year lookback will work the same way.
What the Reference-Year Bill Looks Like
Under the 2026 schedule, each spouse in that tier pays a total Part B premium of $649.20 per month. That includes the $202.90 standard premium plus a $446.30 monthly surcharge. For two spouses over 12 months, the Part B surcharge alone comes to $10,711.20. Part D adds another $83.30 per person each month, or $1,999.20 for the household during the year, on top of the premiums charged by their drug plans.
Together, the two income surcharges would add about $12,710 to the couple’s annual Medicare costs using the 2026 figures. The actual 2028 charge will depend on the rates and brackets published for that year. IRMAA is recalculated annually. If the couple’s 2027 income returns to normal, their 2029 premiums should follow it back down. The condo sale creates a one-year premium spike, not a permanent penalty.
The surcharge cannot simply be appealed because the income was unusual. Social Security can revisit a determination based on corrected tax information, but a properly reported gain remains part of MAGI. IRMAA is one of several Medicare surprises that quietly resize a retirement budget (we mapped the full set of IRMAA cliffs and coverage traps in a free Medicare guide if you want the whole picture).
Why Form SSA-44 Does Not Undo the Sale
Form SSA-44 applies when income falls after a qualifying life-changing event, such as marriage, divorce, the death of a spouse, retirement, reduced work or the loss of income-producing property because of circumstances beyond the owner’s control.
A voluntary sale is not one of those events. Neither is a Roth conversion or another intentionally realized gain. The fact that income will be lower the following year does not turn the condo closing into an eligible appeal. The couple can ask Social Security to correct an error in the tax information or filing status it used. They cannot ask the agency to pretend a valid sale never happened.
Put Medicare Into the Closing Math
The deed fixes the sale date, but several decisions made beforehand can change how much gain Medicare eventually sees:
- Rebuild the basis. Find the original closing statement, improvement records, selling expenses and depreciation schedules. Every supportable dollar added to basis reduces the gain entering MAGI.
- Examine an installment sale before accepting seller financing. Spreading eligible gain over several tax years may prevent one large IRMAA spike, although upfront payments and depreciation-related amounts require separate tax treatment.
- Review the rest of the return. Capital losses can offset capital gains, while postponing a Roth conversion or discretionary portfolio sale can keep another income event from landing beside the condo.
The condo earned its gain one summer at a time. Rebuilding the basis and checking the IRMAA brackets before closing keeps Medicare from becoming the final surprise packed into the sale.
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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.
