Why Outdated Tax Thresholds Are Punishing Millions of American Homeowners — and What Needs to Change
What Is Capital Gains Indexing — and Why Does It Matter?
When you sell an asset for more than you paid for it, the profit is called a capital gain. For homeowners, that gain is the difference between what they paid for their home and what they sell it for. Under current U.S. tax law, individuals can exclude up to $250,000 in home sale profits from capital gains taxes, and married couples filing jointly can exclude up to $500,000 — provided they meet certain ownership and residency requirements.
That sounds like a generous buffer. But here’s the problem: those exclusion thresholds were set in 1997 and have never been adjusted for inflation.
Indexing capital gains rates means tying the exclusion thresholds — and potentially the tax rates themselves — to inflation, so that homeowners aren’t penalized simply because the dollar has lost purchasing power over time. Without indexing, a threshold that was meaningful a generation ago has quietly eroded into something far less protective.
Nearly 30 Years Without an Update
The Tax Relief Act of 1997 introduced the current home sale exclusions: $250,000 for individuals and $500,000 for married couples. At the time, those figures offered meaningful protection for the vast majority of homeowners.
But that was nearly 30 years ago.
Since 1997, cumulative inflation has reduced the real value of the dollar by more than 40%. A home that sold for $400,000 in 1997 would need to sell for well over $700,000 today just to represent the same real purchasing power. Meanwhile, home values in many U.S. markets have surged far beyond inflation — driven by chronic housing supply shortages, demographic demand, and record-low interest rates during the 2010s and early 2020s.
The result is a tax threshold that hasn’t moved an inch while the housing market has moved dramatically. The gap between what the law was designed to protect and what it actually protects today has never been wider.
29 Million Homeowners Are Already Exposed
The scale of this problem is not theoretical. According to research from the National Association of REALTORS® (NAR), approximately 29 million homeowners — representing 34% of all current U.S. homeowners — already face potential capital gains tax liability if they sell their homes today.
That figure is striking on its own. But the trajectory makes it more urgent.
As home values continue to appreciate and the exclusion thresholds remain frozen, the number of exposed homeowners is expected to climb sharply over the next decade. Millions of middle-class homeowners who purchased modest homes in appreciating markets — not wealthy investors, not house flippers, but ordinary families who bought a home and stayed — are now sitting on paper gains that exceed the legal exclusion limits.
These homeowners made no exotic financial moves. Many of them simply bought in cities like Austin, Denver, Miami, or Seattle at the right time and watched their local market transform around them. Under current law, if they sell, they owe taxes on gains they never anticipated and may not even be able to spend — because buying a comparable home in the same market may cost just as much or more.
The Hidden Tax on Home Equity
Capital gains taxes on home sales create a dynamic that economists sometimes call a “lock-in effect.” When selling triggers a significant tax bill, homeowners have a financial incentive to stay put — even when moving would better suit their needs.
Consider a retired couple who bought their home in 1995 for $180,000. Today, it’s worth $900,000. Their gain is $720,000. After the $500,000 married exclusion, they owe capital gains tax on $220,000. At the federal long-term capital gains rate — which can be 15% or 20% depending on income — that’s a tax bill of $33,000 to $44,000, before any applicable state taxes.
This couple may want to downsize. They may need to move closer to family or into a more accessible home. But the tax penalty for doing so is a powerful disincentive. So they stay. And their home — potentially well-suited for a growing family — stays off the market.
Multiply that scenario across millions of homeowners, and the lock-in effect becomes a structural constraint on housing supply. In a country already suffering from a well-documented housing shortage, frozen capital gains thresholds are quietly making the problem worse.
Who Is Most Affected?
The conventional image of a capital gains taxpayer is a wealthy investor with a portfolio of assets. But NAR’s data paints a different picture of who actually faces home sale capital gains exposure:
- Long-term homeowners in appreciating metros — families who bought in coastal cities or Sun Belt markets decades ago and have watched values surge
- Retirees and near-retirees — older Americans whose home equity represents a large share of their net worth and who may need to liquidate to fund retirement or eldercare costs
- Empty nesters — couples whose homes no longer fit their needs but who face punishing tax bills upon sale
- Moderate-income households in high-cost areas — people who are “house rich” but not wealthy in any other meaningful sense, for whom a large tax bill is genuinely burdensome
The frozen thresholds disproportionately affect these groups — not because they are wealthy, but because they have owned their homes long enough to benefit from decades of appreciation.
Why Indexing Is the Right Policy Response
Indexing capital gains exclusions to inflation is not a radical idea. It is a straightforward recognition that the purchasing power of money changes over time, and that tax law should reflect economic reality.
Here’s what indexing would accomplish:
1. Restore the original intent of the 1997 exclusion. Congress set the $250,000/$500,000 thresholds at levels designed to protect most homeowners. Indexing would ensure that protection remains real, not nominal.
2. Reduce the lock-in effect. When the tax cost of selling is lower or eliminated for more homeowners, more homes come onto the market — improving supply and easing price pressure for buyers.
3. Reflect actual economic gain, not inflation. If a home appreciated at the rate of inflation, the homeowner earned no real gain — they simply kept pace with rising prices. Taxing that outcome punishes homeowners for inflation they didn’t cause and couldn’t control.
4. Provide relief to middle-class households. As NAR’s research makes clear, the population of affected homeowners is not a narrow class of the ultra-wealthy. It is tens of millions of ordinary Americans who happened to own property in markets that appreciated.
5. Prevent the problem from compounding. With 29 million homeowners already exposed and the number expected to grow sharply, the cost of inaction rises every year. Indexing now prevents the gap from widening further.
The Numbers Are Going to Get Worse
NAR’s projection that the number of exposed homeowners will climb sharply over the next decade reflects a straightforward reality: home values in most U.S. markets are significantly higher than they were even five years ago, and the pace of appreciation has outrun wage growth, inflation, and every policy adjustment that might otherwise cushion the impact.
The median U.S. home price has roughly doubled since 2012. In some markets — particularly along the coasts and in high-growth Sun Belt metros — prices have tripled or more. Homeowners who purchased during the 2010s and early 2020s are already building equity that will, within years, push them past the current exclusion limits.
If the thresholds remain frozen at 1997 levels, the share of homeowners facing capital gains exposure is not going to stabilize at 34%. It will keep rising — reaching a point where a majority of homeowners face tax liability upon sale. At that point, capital gains taxes on home sales will no longer function as a targeted tax on large windfalls. They will function as a broad tax on homeownership itself.
What Congress Can Do
There are several policy levers available to address this problem. The most straightforward options include:
- Automatic CPI indexing of the $250,000/$500,000 exclusion thresholds, so they adjust with inflation going forward
- A one-time upward adjustment to bring the thresholds in line with where they would be today had they been indexed since 1997 (approximately $440,000 for individuals and $880,000 for couples)
- Broader capital gains rate reform that accounts for the inflationary component of asset appreciation
- Expanded exclusion amounts for homeowners who have owned their primary residence for longer periods, recognizing that long-term ownership drives larger nominal gains
Any of these approaches would be a meaningful improvement over the current policy of doing nothing while the affected population grows.
The Bottom Line
The United States has not updated its home sale capital gains exclusions in nearly 30 years. In that time, inflation has eroded the real value of those thresholds by more than 40%, and home values in many markets have surged far beyond inflation. The result is that 29 million American homeowners — 34% of all homeowners — already face potential capital gains taxes if they sell today, and that number is on track to grow substantially over the next decade.
This is not a problem of wealthy speculators gaming the tax code. It is a problem of ordinary homeowners being caught in a tax structure that hasn’t adapted to economic reality. It constrains housing supply, penalizes mobility, and imposes real financial hardship on families who simply owned a home in a rising market.
Indexing capital gains exclusions to inflation is the minimum reasonable response. It would restore the original intent of the 1997 law, provide relief to millions of middle-class homeowners, and help unlock inventory in a housing market that desperately needs more of it.
The case for indexing isn’t ideological. It’s mathematical. The numbers make it necessary — and the longer Congress waits, the larger the problem becomes.
Are you thinking about buying or selling real estate in the South Florida area? We can help! Contact Natasha at Live South Florida Realty, Inc. today! Also, be sure to download the free Florida Home Search App for your smartphone or tablet.
This article is intended for informational purposes and does not constitute tax or legal advice. Homeowners should consult a qualified tax professional regarding their individual circumstances.
