The Home Sale Tax Rule That Has Not Changed Since 1997 and Why Long-Term Homeowners Should Be Paying Attention

Three Decades of Home Value Growth. One Rule That Has Never Kept Up.

If you have owned your home for ten years or more you have likely watched its value climb in ways that felt encouraging and maybe even a little surprising along the way. That appreciation is real wealth and for many long-term homeowners it represents the most significant financial asset they own.

But when the conversation turns to actually selling and moving into the next chapter, a tax rule that has not been updated since 1997 may be turning that wealth into a reason to stay rather than a reason to act. That rule is now at the center of a serious and active conversation in Washington and if you are sitting on significant equity the details of what is being discussed matter directly to decisions you may be facing in the next few years.

What the Law Currently Allows

Federal tax law permits homeowners selling their primary residence to exclude a portion of their profit from capital gains taxes. Single filers can exclude up to $250,000 in gains. Married couples filing jointly can exclude up to $500,000. To qualify the home must have served as your primary residence for at least two of the last five years before the sale.

When Congress established these thresholds in 1997 the median home price in the United States was well under $200,000. The exclusions were designed to be generous enough to shield virtually every seller from any capital gains exposure at all. Today in markets across the country where home values have doubled, tripled, or more over the past two to three decades a growing number of long-term owners are sitting on gains that exceed those limits significantly. The thresholds have never been adjusted for inflation and have never been updated to reflect what has happened to housing values since the rule was written. The gap between a 1997 policy and a 2025 housing market is now wide enough to affect real decisions for real homeowners.

Why Long-Term Owners Are Choosing to Stay Put

The financial calculation that many long-term homeowners are running right now is leading a meaningful number of them to the same conclusion: staying is the smarter financial move even when moving is genuinely what they want to do.

As Shelby Pennix explains this dynamic plays out in very concrete terms. A homeowner who purchased their property for $190,000 and is now sitting on a home worth $700,000 faces a gain of $510,000. For a single filer that puts $260,000 above the current exclusion threshold and potentially subject to federal capital gains taxes at rates that can reach 20 percent before any applicable state taxes are considered. What was supposed to feel like a reward for years of homeownership can suddenly look like a significant and unexpected cost of moving forward.

When enough homeowners make this calculation simultaneously and decide to hold rather than sell the effect on housing supply is measurable. Homes that would otherwise enter the market simply do not and communities that could benefit from more available inventory stay constrained in ways that affect buyers across every price range.

What Is Being Debated in Washington

The policy conversation now happening among lawmakers centers on whether the exclusion thresholds need to be modernized for the first time in nearly three decades. Two approaches are under active discussion. The first is raising the caps to a new fixed amount that better reflects what home values actually look like across the country today. The second is indexing the exclusion to inflation going forward so that the thresholds adjust automatically over time rather than remaining frozen until Congress decides to revisit them again decades from now.

Both proposals are tied to the same underlying argument about housing supply. If long-term owners feel more financially comfortable with the financial outcome of selling more homes enter the market. Whether that effect would be large enough to produce meaningful inventory relief is debated among economists. Some analysts argue the majority of sellers already fall under the current thresholds and would not be directly affected by a higher cap. Others believe the barrier is real and significant enough in high-appreciation markets to genuinely shift behavior at scale.

What is not debatable is that the conversation is happening seriously enough and visibly enough that any long-term homeowner with substantial equity and a potential move on the horizon should be paying close attention even without final legislation in place.

The Planning Mistakes That Cost Long-Term Sellers the Most

Regardless of what ultimately happens with the exclusion thresholds there are steps long-term homeowners can take right now that directly affect how much of their gain they keep when they eventually sell. The most consistently overlooked involves documentation of capital improvements made throughout the years of ownership.

Significant upgrades including room additions, major renovations, roof replacements, new HVAC systems, and other substantial improvements can all be added to your cost basis. A higher cost basis means a smaller taxable gain at the point of sale. Without records to support those additions the financial benefit disappears entirely and you pay taxes on gains that your own investment should have offset.

Timing matters significantly as well. The calendar year in which a sale closes, your overall income for that year, and how the proceeds interact with other financial decisions can all affect what you ultimately owe. These variables can be managed thoughtfully but only when planning begins well before you are under contract and options have narrowed.

As Shelby Pennix points out, the sellers who come through this process in the strongest financial position are almost always the ones who started the conversation with both a tax professional and a knowledgeable loan officer at least a year before they were ready to list, not in the final weeks after signing a contract when the most consequential decisions have already been made.

What You Should Do Before the Rules or the Market Shifts

You do not need to wait for a congressional vote before getting your situation in order. If you are a long-term homeowner with meaningful equity and a move somewhere in your one to three year planning horizon taking stock of your position now puts you in a far stronger place regardless of what ultimately happens with the exclusion thresholds.

Start by pulling together records of your original purchase price and any documented improvements made since buying. Have a preliminary conversation with a tax professional to estimate your potential gain under current law and understand what your exposure looks like. And connect with a loan officer who can help you think through how a sale fits into your broader financial picture and what your options look like on the other side of the transaction.

Shelby Pennix works with long-term homeowners to build clarity and a real plan before decisions need to be made under pressure or on a compressed timeline. Reach out to Shelby Pennix to get ahead of the conversation before the market or the tax code shifts around you.

Sources

IRS.gov NAR.realtor TaxFoundation.org Forbes.com Realtor.com