Home values have climbed enough in many parts of the country that longtime homeowners selling now can end up with more profit than they expect, and more of it exposed to tax than they realize. A federal tax break shields a large chunk of that profit from capital gains tax for most sellers, but it has real limits, and a retiree downsizing after decades in the same house is exactly the kind of seller who can bump up against them.
How the Home-Sale Exclusion Works
Under longstanding federal tax law, a homeowner who sells a main residence can exclude up to $250,000 of the gain from taxable income, or up to $500,000 for a married couple filing a joint return, according to IRS Topic 701, Sale of Your Home. The gain, for tax purposes, is generally the sale price minus the original purchase price and the cost of qualifying home improvements made over the years, not simply the difference between what a seller paid decades ago and what the home sells for today, though for many long-term owners those numbers end up close.
To qualify, a seller must meet two separate tests during the five years leading up to the sale: the ownership test, meaning the home was owned for at least two of those five years, and the use test, meaning it served as the seller’s main home for at least two of those five years. The two-year periods for ownership and use do not have to be the same stretch of time, but both must fall within the five years before the sale. Sellers generally cannot claim the exclusion again if they already excluded gain from a different home sale within the two years before the current sale.
Free retirement updates: Social Security and Medicare change every year, and nobody sends you a memo. Our free Retirement Shield newsletter breaks down what changed and what to do. Get it free in your inbox.
Where Long-Term Owners Run Into the Limit
The exclusion amounts have not changed since they were set decades ago, while home values in many markets have risen substantially since then, particularly for homes purchased many years or decades ago at a fraction of today’s prices. A couple who bought a home in a fast-appreciating area long ago and is now selling for a large profit can find that their gain exceeds even the $500,000 joint exclusion, leaving the excess subject to capital gains tax. A single filer, with only a $250,000 exclusion, hits that ceiling more easily than a married couple filing jointly, which is one reason marital status and how a sale is reported can matter significantly for the tax outcome.
This scenario comes up often for retirees downsizing out of a home they have owned for thirty or forty years, or for a surviving spouse selling a longtime family home after a partner’s death. A widow or widower who inherits sole ownership may only qualify for the $250,000 single-filer exclusion going forward, even though the couple could have excluded up to $500,000 had they sold while both were alive and filing jointly, making the timing of a sale after a spouse’s death a genuine financial consideration.
Improvements and Records Matter
Because the taxable gain is based on the difference between the sale price and the home’s adjusted basis, which includes the original purchase price plus the cost of qualifying capital improvements over the years, keeping records of major renovations, additions, and upgrades can directly reduce the taxable portion of a sale. A new roof, a kitchen remodel, or an added bathroom generally increases the basis and lowers the taxable gain; routine repairs and maintenance generally do not. Sellers who never tracked these costs over the decades may want to reconstruct what records they can, since documented improvements can meaningfully shrink the amount of gain that falls outside the exclusion.
Reporting the Sale, Installment Payments, and a Military Service Exception
Even when a gain falls entirely under the exclusion, a seller is not automatically excused from reporting the sale. Anyone who receives Form 1099-S, Proceeds From Real Estate Transactions, from the closing agent or title company must report the sale, and anyone whose gain exceeds the exclusion must also report it, using Schedule D and Form 8949 to calculate and disclose the taxable portion. Skipping that step because the gain seems fully excluded can trigger a mismatch notice later, since the IRS separately receives its own copy of any 1099-S filed on the transaction.
Sellers who finance part of the sale themselves, collecting payments from the buyer over several years instead of the full price at closing, have made what the IRS calls an installment sale. The home-sale exclusion still applies, reducing or eliminating the taxable share of each year’s payment, but the seller generally must report the transaction on Form 6252 and spread any non-excluded gain across the years payments arrive, rather than reporting it all in the year of the sale.
A narrower provision benefits military families and certain government employees. A homeowner or spouse on qualified extended duty with the uniformed services, the Foreign Service, or the intelligence community, meaning stationed at least 50 miles from the home or living under government orders in government housing for more than 90 days, can elect to suspend the five-year ownership-and-use window for up to ten years. That suspension can effectively give a military family up to fifteen years, the original five plus a ten-year pause, to meet the ownership and use tests, which matters for a household stationed away from a home it intended to sell and reoccupy later.
What to Do Before Selling
Sellers who expect their gain to approach or exceed the exclusion limit benefit from running the numbers well before listing a home, since the excluded and non-excluded portions of a sale get reported differently on a tax return, and any gain above the exclusion is taxed at capital gains rates rather than ordinary income rates. A tax professional can help confirm whether the ownership and use tests are met, tally qualifying improvements against the purchase price, and estimate the taxable portion of a sale before a retiree commits to a closing date.
This article was produced with the assistance of AI and reviewed by The Financial Wire editorial team.
More Financial Reading
- How many CDs can you park at 1 bank? FDIC rules you must know
- Adding someone to your bank account: tax traps and smart moves
David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
