Married couples who sell a primary residence in 2026 can shield up to $500,000 in capital gains from federal income tax, the same dollar ceiling Congress locked in nearly three decades ago. Single filers face a $250,000 cap. Both thresholds were written into law by the Taxpayer Relief Act of 1997, and neither figure has been adjusted for inflation or rising home values since. For long-term homeowners sitting on steep appreciation, the gap between that fixed exclusion and actual gains keeps widening.
The 1997 law and its unchanged dollar limits
The exclusion lives in Section 121 of the Internal Revenue Code, which sets a $250,000 ceiling for most individual filers and a $500,000 ceiling for married couples filing jointly. Congress created these figures through Section 312 of Public Law 105-34, formally titled the Taxpayer Relief Act of 1997. That provision replaced an older, more complicated rollover system with a simpler per-sale exclusion. The IRS traced the change directly to Section 312 of the 1997 statute in its 2007 bulletin, confirming the legislative lineage that still governs every qualifying home sale filed on a federal return.
To claim the full exclusion, each spouse on a joint return must pass a two-out-of-five-year ownership and use test, meaning the couple must have owned and lived in the home as a principal residence for at least two of the five years before the sale date. Treasury regulations spell out the mechanics in regulation 1.121-2, which describes a $250,000 per-taxpayer structure. When both spouses independently satisfy the ownership and use requirements, their individual $250,000 allowances combine to produce the $500,000 joint cap.
That structure means a surviving spouse filing singly after a partner’s death, or a couple where only one spouse meets the use test, may be limited to the lower $250,000 figure. The regulation details how the cap shifts across different filing scenarios, but the headline numbers have not moved since the law took effect for sales after May 1997. While many other provisions of the tax code now adjust automatically with inflation, Congress did not build such an index into the principal residence exclusion, leaving the dollar amounts frozen even as housing markets have changed.
What remains uncertain about future adjustments
No publicly available legislative record confirms that Congress has formally considered, introduced, or voted on a bill to raise the $250,000 or $500,000 thresholds since 1997. The absence of any indexed inflation adjustment in the original statute means the exclusion erodes in real terms every year that home prices climb. Couples who purchased property in the late 1990s or early 2000s in markets that have experienced sharp appreciation may now hold gains that exceed the $500,000 ceiling, but no official IRS dataset or Treasury projection quantifying how many joint filers currently exceed the cap has been identified in available government publications.
Likewise, the IRS publishes guidance on the exclusion through resources such as Publication 523, yet those materials restate the existing dollar limits without projecting how changing property values affect the share of sellers who owe capital-gains tax above the threshold. Without that data, the precise scale of the problem for downsizing couples is difficult to pin down. What is clear from the statutory text is that the numbers have not budged, while the median sale price of existing homes has risen substantially over the same period according to broader housing market indicators not tied to the exclusion itself.
In theory, Congress could amend Section 121 to raise the exclusion, index it to inflation, or redesign it altogether. In practice, there is no binding timetable or procedural trigger that would force lawmakers to revisit these specific dollar amounts. Tax legislation tends to move in broad packages that combine many unrelated provisions, and without a clear legislative proposal on record, homeowners cannot reliably plan on relief from higher exclusion limits in any particular year.
Reading the primary evidence against secondary commentary
The strongest evidence on this topic comes directly from federal statute and regulation. The text of Public Law 105-34 on Congress.gov provides the original legislative language, including Section 312’s title, “Exemption from tax for gain on sale of principal residence.” The U.S. Code maintained by the House Office of the Law Revision Counsel reflects the current version of Section 121 with both dollar amounts intact. Treasury’s implementing regulation at Section 1.121-2 adds operational detail on how the per-taxpayer cap works in practice.
Secondary sources, including financial planning blogs and real estate commentary, frequently cite these same figures but sometimes conflate the exclusion with other tax benefits or overstate the likelihood of near-term legislative change. Some articles, for example, may imply that the exclusion is routinely “adjusted” or that proposals to double the limits are imminent, even when no such bills appear in the legislative record. Readers evaluating their own situation should treat the statute and IRS guidance as the controlling authority and view speculative commentary with caution.
The Treasury Department also publishes general information about taxpayer protections and agency obligations, including materials linked from its No FEAR Act page, but those resources do not alter the substantive rules for principal residence gains. They illustrate a broader point: official federal sites are best read as sources for what the law and administrative policy actually say, not for predictions about what Congress might do next.
One gap in the public record is worth flagging. No primary-source data has been identified showing the number of married joint filers who claimed the full $500,000 exclusion in recent tax years, or how many reported taxable gains above that ceiling on Form 8949. That data would be necessary to measure whether the fixed threshold is producing a measurable increase in capital-gains tax liability among older homeowners who bought decades ago. Until the IRS or Treasury publishes such breakdowns, any estimate of the share of sellers affected will rest on indirect indicators, such as regional price indexes and anecdotal reports from tax practitioners, rather than on direct administrative statistics.
Implications for homeowners and planners
For homeowners approaching a sale, the current framework has several practical consequences. Long-term owners in high-growth markets may face capital gains that exceed the exclusion, even when they have never refinanced aggressively or treated the home as an investment. In those cases, careful recordkeeping around improvements, selling costs, and basis adjustments remains critical, because every documented dollar added to basis can reduce taxable gain above the exclusion cap.
Advisers and homeowners also need to be realistic about timing. Because the law does not automatically adjust, waiting a few years to sell in the hope that Congress will raise the limits carries legislative risk. Decisions about downsizing, relocating, or converting a home to rental use should therefore be grounded in current law as reflected in Section 121 and its regulations, not in uncertain forecasts about future reforms.
Ultimately, the principal residence exclusion still shields a substantial amount of gain for many sellers, and its basic structure has remained stable for nearly three decades. Yet the unchanged dollar caps, set against decades of home-price growth, mean that more households will gradually bump into the ceiling. Until lawmakers revisit the statute or agencies publish more detailed data on who is affected, the best that homeowners can do is understand the existing rules, document their costs carefully, and plan transactions with the current $250,000 and $500,000 thresholds firmly in view.
