One in Four California Sellers Now Owes Tax on Home Equity Gains

One in four California home sellers now walks away from a primary-home sale with more than $500,000 in gains — the exact threshold where federal capital gains taxes kick in for married couples filing jointly. For single filers, that threshold is half as high: $250,000. New data from property analytics firm Cotality puts California at the top of the national ranking for this kind of tax exposure, and the numbers are stark enough that sellers in any fast-appreciating market should be paying attention.

A 1997 Rule Meeting 2026 Home Prices

The federal exclusion that shields primary-home sale profits from capital gains tax — $500,000 for married joint filers, $250,000 for single filers — was written into law in 1997. At the time, the national median home price was roughly $129,000. Today it sits above $419,000, meaning national prices have more than tripled since Congress set those limits. The limits themselves have never been adjusted.

Cotality principal economist Archana Pradhan puts the problem plainly: the current data shows how far housing market conditions have moved beyond the tax law's original intent. In 1997, a million-dollar home in California signaled a luxury property — a genuine outlier. Today, five California metros rank among the ten U.S. markets with the highest luxury-listing thresholds. In Los Angeles, a home doesn't break into the top 10% of listings until it clears $4.1 million. In San Jose, that mark is around $3.25 million. The million-dollar listing, once a rarity, is now common inventory across much of the state.

The National Association of Realtors estimates that more than 13.1 million homeowners nationwide would exceed the applicable capital gains exclusion if they sold today — a figure projected to grow by 1.3 million by 2030, with some analyses putting the 2030 total as high as 20 million affected households, or roughly 23% of all owner-occupied homes.

Long Tenure Amplifies the Problem for California Sellers

High prices alone don't tell the whole story. California sellers also hold their homes longer than nearly anyone else in the country. The typical California seller today has owned their home for just under 11 years — the fourth-longest average tenure of any state, according to real estate data firm ATTOM. Over that same general window, California home prices climbed more than 93%. Nationally, sellers have held for about 8.5 years while prices rose roughly 70%.

The math compounds quickly. Consider a homeowner who bought a median-priced California home around 2002, when that property would have been worth approximately $280,000. At today's California median of about $785,000, that seller is sitting on more than $500,000 in appreciation — right at the married-couple exclusion limit, with any additional gain fully taxable. A single-filer version of that same scenario crosses the exclusion threshold by a much wider margin.

For senior homeowners who have held for 20, 30, or more years, the exposure can be severe. California isn't alone: Cotality found that 21% of sellers in Hawaii and 19% in Washington are also recording gains above $500,000. Roughly 63% of homeowner households in San Jose have unrealized gains above their applicable exclusion threshold, according to NAR analysis. In San Diego, that share is around 54%.

What This Means for Your Pricing Strategy and Net Proceeds

If you're a California seller — or a seller in any market where home values have run hard over the past decade — this data should directly shape how you think about timing, pricing, and what you'll actually keep after the sale.

Know your cost basis before you set a price. Your taxable gain isn't just the difference between your purchase price and your sale price. Capital improvements you've made over the years — a kitchen remodel, a room addition, new HVAC — are added to your cost basis, which reduces your calculated gain. Many sellers underestimate their basis because they never kept organized records of improvement costs. Pull those receipts now, before you list.

Confirm your exclusion eligibility early. To claim the $500,000 or $250,000 exclusion, you generally must have lived in the home as your primary residence for at least two of the five years before the sale. If you've been renting the property out, that clock may have been interrupted. Don't assume you qualify — verify with a tax professional before you price the home.

Model your actual net, not your gross proceeds. A $1.2 million sale sounds like a windfall until you subtract your mortgage payoff, selling costs, and then a capital gains tax bill on the portion of your equity above the exclusion. Federal long-term capital gains rates run 0%, 15%, or 20% depending on your income, and California adds its own state income tax on top — one of the highest in the nation. Your true net could look meaningfully different from the headline number.

Consider the timing of your sale relative to your income year. If your other income varies year to year — retirement distributions, business income, investment sales — the tax year in which you close can shift which federal bracket applies to your gains. A conversation with a CPA before you sign a listing agreement costs far less than a surprise tax bill after closing.

If a faster, simpler sale fits your situation, knowing your net with certainty upfront — before you've committed to months of showings, repairs, and negotiations — is worth calculating. Our instant-offer tool can give you a baseline number to work from as you weigh your options.

The broader policy picture may eventually change. NAR's chief advocacy officer Shannon McGahn has pointed out that the home equity tax has become a measurable barrier to housing mobility — keeping longtime owners in homes they'd otherwise sell, which in turn tightens supply for buyers. But sellers planning a move in 2026 can't wait on legislative action. The exposure is real, the thresholds haven't moved in nearly three decades, and the calculation is yours to run now.