Capital gains tax on selling a house in California

A home sale in California, especially one held for many years in a market that has appreciated the way parts of the state have, raises a real tax question. Take Temecula as an example: a home bought there two decades ago for a fraction of its current value can carry a large gain, and knowing which part of that gain is actually taxable matters before you list. Here is the mechanic, plainly, and where the traps are.

The federal exclusion

Under IRS Publication 523, Selling Your Home, a homeowner can exclude up to $250,000 of gain from federal tax if filing single, or $500,000 if married filing jointly, provided the home was owned and used as a primary residence for at least two of the five years before the sale. Gain above that threshold is taxable. This is the single most important number in this article, and it covers the majority of primary-residence sales without any tax owed at all.

California conforms, it does not add its own break

California does not have a separate home-sale exclusion. The state generally conforms to the federal Section 121 rules, so the same $250,000 and $500,000 thresholds apply for state purposes as well. Where California differs is what happens above that threshold: gain that exceeds the federal exclusion is taxed as ordinary income under state law, not at a preferential capital-gains rate the way it might be federally, with a top marginal rate of 13.3 percent. See the Franchise Tax Board’s real estate income guidance for the state’s treatment. That is a meaningfully different calculation than the federal long-term capital gains rate, and it is worth running with a CPA rather than assuming the two numbers move together.

What actually counts as gain

Gain is not simply sale price minus purchase price. It is sale price, minus your adjusted basis (what you paid, plus qualifying capital improvements over the years, not routine maintenance), minus selling costs like commission and certain closing fees. A homeowner who has owned a home for fifteen or twenty years and made real improvements, a room addition, a pool, a major system replacement, may have a meaningfully higher basis, and therefore lower taxable gain, than a simple purchase-price comparison suggests. Keep receipts and permits for improvements; they are the documentation that actually lowers the number.

The depreciation-recapture trap

If the home was ever a rental, even for part of its ownership history, there is a separate wrinkle. Any depreciation you claimed (or were entitled to claim) while it was a rental is recaptured at sale, taxed federally at a flat rate of up to 25 percent on that recaptured portion, regardless of your regular income tax bracket, per IRS Publication 523 and the related depreciation-recapture rules in IRS Publication 551, Basis of Assets. This is easy to miss because the rest of the gain may be fully excluded under Section 121, while the recaptured depreciation is not. If your home was ever rented out, even briefly, tell your CPA before you list, not after you close.

The separate question of an inherited home

If the home you are selling was inherited rather than purchased, the basis rules are entirely different, an heir’s basis is generally stepped up to the home’s value on the date of death, which can eliminate most or all capital gains on a prompt sale even without the Section 121 exclusion. That is a separate system from Prop 19’s changes to property tax reassessment on inherited homes, and the two get confused constantly. If this applies to you, this article is not the full answer, ask your CPA specifically about basis step-up rules for inherited property. Special situations covers the broader process for a probate or an inherited home sale in this market.

An alternative for an investor: the 1031 exchange

An investor selling a rental property, rather than a primary residence, has an option a primary-residence seller does not: a 1031 exchange, which defers capital gains tax by rolling proceeds into a replacement investment property under strict timing rules. This is a separate mechanism from the Section 121 exclusion above and applies only to investment or business property, not a personal residence. If you are financing the replacement property as a rental, DSCR loans in California covers how that qualifying process works for an investor buyer.

What to gather before you list, not after you close

Before you talk to a CPA, or ideally before you even list, gather: your original purchase documents and closing statement, records of capital improvements with receipts or permits where possible, records of any period the home was rented (including depreciation claimed), and, if inherited, a date-of-death appraisal or comparable sales from that time. Having this ready before escrow closes, rather than reconstructing it afterward under a filing deadline, is the difference between an accurate return and a guess.

Start with a real number on the home itself. Get your home’s value gives you the current comparable-sales range for your specific property, the same kind of specific figure your CPA will need to estimate gain before you ever put the home on the market. For the full picture of what selling actually costs beyond taxes, commission, closing costs, and local line items, see How much does it cost to sell a house in California.

This is not tax advice

Capital gains rules, exclusion amounts, and California’s conformity to federal tax law are all subject to change, and how they apply to your specific ownership history, basis, and filing status is a calculation a CPA should run, not a general article. Treat everything above as the framework for that conversation, not a substitute for it.