A $1.275 Million Home Is for Sale in Her Neighborhood. Selling Hers Won’t Cost a Social Security Check, but It Can Make 85% of Her Benefits Taxable
Selling a home near a million-dollar listing sounds like a windfall, but a retiree already collecting Social Security could find the IRS quietly pulling most of her monthly checks into taxable income before she even unpacks the moving boxes.
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A 4,000-square-foot home in Spring, Texas, is listed for $1.275 million. Let’s say a hypothetical 64-year-old neighbor sees that price and starts to wonder if it’s time to sell the house she has owned for decades.
The neighbor took Social Security at 62 and has yet to reach her full retirement age (FRA) of 67. Her first worry: will a big sale shrink her monthly checks? The IRS and Social Security each measure income differently.
Why Social Security Won’t Withhold a Dime Over the Sale
Before reaching the age for full benefits, Social Security applies a retirement earnings test. In 2026, it holds back $1 for every $2 earned above $24,480. That test counts only wages and net self-employment income.
A capital gain from selling her home falls outside both categories. She could realize $20,000 or $200,000 of taxable gain, and Social Security still wouldn’t withhold a single monthly check because of the sale.
Where the Home-Sale Exclusion Runs Out
Say she sells for $900,000. Her adjusted basis (the purchase price plus documented improvements) and her eligible selling expenses add up to $500,000. That leaves a $400,000 gain.
Section 121 of the tax code lets a qualifying single homeowner exclude $250,000 of gain. The remaining $150,000 goes into her adjusted gross income. Paying off a mortgage or putting the proceeds into another home leaves that number exactly where it is. That assumes she owned and lived in the house as her main home for at least two of the five years before the sale and did not use the exclusion on another home during the previous two years.
How $150,000 of Gain Makes 85% of Her Checks Taxable
To decide how much of her Social Security to tax, the IRS looks at provisional income: her other income plus half of her benefits. For a single filer, benefits become taxable once provisional income tops $25,000. Above $34,000, up to 85% can be taxed. Capital gains count toward the total.
She receives $36,000 a year from Social Security, plus $12,000 of pension and interest income. Before the sale, her provisional income is about $30,000, and roughly $2,500 of her benefits is taxable.
Add the home gain and her provisional income rises to roughly $180,000. That puts her at the maximum: $30,600, or 85% of her $36,000 benefit, becomes taxable.
The sale adds about $28,100 of her Social Security to her taxable income. The gain acts like a truck pulling a trailer: it gets taxed and drags most of her benefits into taxable income along with it.
That does not mean her Social Security faces an 85% tax rate. It means the taxable share joins her pension and interest as ordinary income, while the $150,000 home gain keeps its capital-gains treatment. Her deductions and the way those two types of income stack on the return determine the final bill, so one tax bracket alone cannot price it.
Plan Around the Gain Instead of the Listing Price
A $1.275 million listing down the street gets people talking. The number that drives her tax bill is the gain left after her basis, her selling expenses and the exclusion. Before she lists, she should find her original closing statement, gather her improvement receipts and estimate what the sale will cost her.
Timing matters. A December closing versus a January closing puts the sale in a different tax year, which may prevent it from piling on top of an IRA withdrawal, a Roth conversion, or other one-time income.
Her tax bill can also come due before filing season if she plans for it. Raising her withholding or making an estimated payment in the quarter she closes spreads out the cost and helps her avoid penalties.
The gain can also raise her Medicare Part B and Part D premiums two years later. The 2028 rates have not been published, but under the 2026 table, a single filer with MAGI above $109,000 pays an income-related surcharge on top of the standard $202.90 Part B premium. The 85% rule and the IRMAA surcharge are two of the quieter ways retirement income gets cut. We listed the full set in a free guide on retiree tax traps, here.
Run the Numbers Before You Sign
Every seller has a different basis, a unique list of improvements and personal other income, so her numbers won’t match yours. A tax professional can work through the details using your actual paperwork.
The home sale won’t take away a single Social Security check. Working out the gain before closing tells her how much of every check the IRS will get to tax.
Contact [email protected] for any questions or corrections.
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.
