Key Takeaways

• Inherited property gets a stepped-up basis — its cost basis resets to the fair market value at the date of death.
• That step-up can dramatically reduce or eliminate capital gains tax when heirs later sell, since gain is measured from the stepped-up value, not what the deceased originally paid.
• California community property can get a valuable double step-up — both halves reset when the first spouse dies.
• This is a tax matter, and the rules and figures are a question for a CPA — the firm does not give tax advice.
• Understanding the step-up helps heirs and surviving spouses make smart decisions about selling inherited property.

Why Basis Matters So Much

When you sell property, you’re taxed on the gain — roughly, the sale price minus your “basis” (generally what you paid for it, with adjustments). For an asset that’s appreciated over decades, like a California home bought long ago, that gain can be enormous, and the capital gains tax substantial.

Here’s where inheritance changes everything. When property passes at death, the heir generally doesn’t take over the deceased person’s old, low basis. Instead, the basis steps up to the property’s fair market value as of the date of death. This stepped-up basis can wipe out decades of appreciation for tax purposes — which is why it’s one of the most valuable features in all of estate and tax planning, and something every heir of appreciated California real estate should understand.

Because this is fundamentally a tax topic, what follows is general information, not tax advice — the specifics for any estate belong with a CPA or tax professional.

How the Step-Up Works

Imagine a parent bought a California home decades ago for $100,000, and it’s worth $1,000,000 when they die. If the parent had sold it during life, they’d have faced capital gains tax on roughly $900,000 of appreciation (subject to any available exclusions).

But when the child inherits the home, its basis steps up to the $1,000,000 date-of-death value. If the child then sells it for $1,000,000, there’s little or no taxable gain — the appreciation that built up during the parent’s life essentially escapes capital gains tax. If the child holds the property and sells later for $1,100,000, the taxable gain is only the $100,000 of appreciation after the step-up, not the full appreciation since the original purchase.

That reset is the power of the step-up: it measures the heir’s gain from the date-of-death value forward, not from the deceased person’s original cost. For long-held, highly appreciated California real estate, the savings can be life-changing.

The California Community Property Double Step-Up

California, as a community property state, offers an especially valuable version of this for married couples: the double step-up.

For property held as community property, when the first spouse dies, both halves of the community property get a stepped-up basis — not just the deceased spouse’s half. So the surviving spouse ends up with a full step-up on the entire asset, even though only one spouse died.

Compare that to property held in some other forms (like joint tenancy), where typically only the deceased owner’s half steps up. The double step-up can mean a dramatically lower taxable gain when the surviving spouse later sells — which is why how a couple holds title to appreciated property has real tax consequences. Whether a particular asset qualifies, and how to document it, is exactly the kind of question to bring to a CPA, ideally before the first spouse’s death.

Inherited a long-held California home and weighing whether to sell? The step-up can make a huge tax difference, and a CPA can run your specific numbers. Bay Legal can help with the legal side of handling the property.

For guidance on your specific situation, call (650) 668-8000 or schedule a consultation at baylegal.com/contact.

Selling an Inherited Home: The Practical Picture

For an heir who inherits a California home, the step-up shapes the sell-or-hold decision:

• Selling soon after death often produces little taxable gain, because the sale price is close to the stepped-up (date-of-death) value. This is why many heirs sell relatively soon — the tax cost of doing so is frequently low.
• Holding and selling later means any appreciation after the date of death is taxable gain, measured from the stepped-up basis.
• A surviving spouse selling a former primary residence may also have a separate capital gains exclusion available, on top of the step-up — another CPA question.

The step-up also interacts with how the property was titled and whether it passed through probate, a trust, or otherwise — but the basis reset generally applies to property included in the estate at death regardless of the transfer mechanism. The valuation that establishes the stepped-up basis often comes from the same date-of-death appraisal used in probate, which is one reason getting that appraisal right matters.

This Is a Tax Question — Get a CPA

It bears repeating: step-up in basis and capital gains are tax matters. The rules have nuances — how basis is documented, how the double step-up is established, how exclusions apply, how state and federal treatment interact — and the figures change. The firm does not provide tax advice, and nothing here is a substitute for a CPA or tax professional who can apply the current rules to your specific situation. What a probate attorney can do is help you handle the property correctly — the title, the sale within an estate, the legal steps — while your tax professional handles the tax analysis. The two work best together.

Handling inherited California real estate involves both legal and tax pieces. Bay Legal can handle the legal side and coordinate with your CPA on the rest.

For guidance on your specific situation, call (650) 668-8000 or schedule a consultation at baylegal.com/contact.

How This Fits With the Rest of Probate

The stepped-up basis often relies on the date-of-death value set by the probate referee’s appraisal, and it shapes decisions about selling an inherited home. It interacts with Proposition 19 (which is about property tax, a separate issue from capital gains) and with overall estate planning. For the full process, see our complete guide to California probate.

Frequently Asked Questions

What is a step-up in basis on inherited property?

It’s the reset of an inherited asset’s cost basis to its fair market value at the date of death. Capital gains on a later sale are then measured from that stepped-up value, which can sharply reduce or eliminate tax on appreciation that built up during the deceased person’s life.

Do you pay capital gains tax on an inherited house in California?

Only on appreciation after the date of death, because the basis steps up to the date-of-death value. Selling soon after death often produces little taxable gain; holding and selling later taxes the post-death appreciation. Specifics are a CPA question.

What is the double step-up in California?

For community property, both halves of the asset receive a stepped-up basis when the first spouse dies — not just the deceased spouse’s half. This can dramatically reduce the surviving spouse’s taxable gain on a later sale.

Does inherited property in California get a step-up if it was in a trust?

The basis step-up generally applies to property included in the estate at death regardless of whether it passed through probate or a trust. The details are a tax question for a CPA.

Is step-up in basis the same as Proposition 19?

No. Step-up in basis is about capital gains tax on a sale. Proposition 19 is about property tax reassessment when property changes hands. They’re separate issues that both affect inherited California property.