CALIFORNIA REAL ESTATE & TAX  |  WHAT HEIRS NEED TO KNOW

Step-Up in Basis When You Inherit a Home in California. What Heirs Need to Know

This is the most valuable and least understood tax rule in a California estate sale. It can eliminate decades of capital gains tax in a single step. Here is how it works, what it does not cover, and what heirs need to do to protect it.

When a parent passes away and leaves a home to their children, one of the first questions that comes up is the tax question. How much will we owe when we sell? Will decades of appreciation get taxed all at once? Do we need to sell quickly or wait?

For most California heirs, the answer to the first two questions is far better than they expect. And it comes down to a single rule that most people have never heard of until they are in the middle of an estate situation.

It is called the step-up in basis. And for families inheriting a home in California, understanding it can mean the difference between owing tens of thousands of dollars in taxes and owing essentially nothing.

I am not a tax advisor, and nothing in this post is tax or legal advice. But I work regularly with heirs navigating inherited properties, and I have seen this rule surprise people in the best possible way often enough that I think it deserves a plain-English explanation.

What Is a Basis, and Why Does It Matter?

To understand the step-up, you first need to understand what basis means in the context of real estate.

When someone sells a home, they do not pay capital gains tax on the full sale price. They pay it on the gain, which is the difference between the sale price and their basis. The basis is, broadly speaking, what the property cost them, the original purchase price, plus documented capital improvements, minus any depreciation claimed.

For a parent who bought a home in the 1980s or 1990s, the basis might be $120,000 or $150,000. If that home is now worth $750,000, the gain on a sale would be $600,000 or more, subject to whatever exclusions apply. That is a significant tax exposure.

Here is where the step-up changes everything.

"Instead of inheriting your parent's tax history, you start over with a new basis based on what the property was worth when they died."

When a property is inherited, the heir does not inherit the original owner's basis. Under federal law, specifically Internal Revenue Code Section 1014, the basis of inherited property is reset to the fair market value of the property on the date of the owner's death. That reset is called the step-up in basis.

What this means in practice: if your parent bought their home for $150,000 in 1990 and it is worth $850,000 when they pass away, your inherited basis is $850,000, not $150,000. If you sell the home shortly after for $850,000, your taxable gain is zero. The $700,000 of appreciation that occurred during your parent's lifetime is not taxed at all.

A Plain-English Example

How the step-up in basis works:

  Parent purchased home in 1988 for:                    $145,000

  Fair market value at date of death in 2026:          $875,000

  WITHOUT the step-up (if they had sold it themselves):

  Taxable gain would be approximately $730,000   minus any exclusions and selling costs

  WITH the step-up (heir inherits and sells):

  Inherited basis:                                      $875,000

  Sale price (shortly after):                       $875,000

  Taxable gain:                                         $0

  The $730,000 of lifetime appreciation is not taxed.   It is erased at the moment of inheritance.

 Note: If the home continues to appreciate after the date   of death, that new appreciation is taxable when the heir sells.   The step-up eliminates pre-death gain, not post-death gain.

The California Advantage - Community Property

In most states, only half of a jointly owned home gets the step-up when the first spouse dies. The deceased spouse's half resets to current market value. The surviving spouse's half keeps the original, often much lower, basis from decades ago.

California works differently, and for married homeowners here, the difference is significant.

California is a community property state. For a home held as community property, both halves of the property generally step up to fair market value when the first spouse dies. Not just the deceased spouse's half. Both halves.

This means a surviving spouse who sells the family home after a spouse's death starts with a basis equal to the full current market value of the home, not just half of it. The potential tax savings compared to a non-community property state can be enormous.

Community property step-up — California vs. other states:

  Example: Married couple, home purchased for $200,000 in 1995.

  Current value: $900,000. First spouse passes away in 2026.

  Most states (separate property states):

  Only the deceased spouse's half steps up.

  Surviving spouse's new combined basis: approximately $550,000

  ($100,000 original half + $450,000 stepped-up half)

  California (community property state):

  Both halves step up to current value.

  Surviving spouse's new basis: $900,000

  Difference in taxable gain if the survivor sells: $350,000

  At a combined federal and California rate of 25-30%,

  that difference can represent $87,000 to $105,000 in taxes.

This benefit applies to property held as community property or as community property with right of survivorship. It does not apply to property held as joint tenancy, which is a common titling choice but one that may cost the surviving spouse significantly more in taxes. If you are unsure how your home is titled, your county recorder's office or a title company can confirm.

Step-Up in Basis vs. Proposition 19 - Two Different Rules

This is one of the most common points of confusion I see among heirs, and it is worth addressing directly.

The step-up in basis and Proposition 19 are two completely separate rules that govern two completely different taxes.

The step-up in basis is a federal income tax rule. It governs how much capital gains tax an heir owes when they eventually sell the inherited property. It is administered by the IRS and applies nationwide.

Proposition 19 is a California property tax rule. It governs how the county assessor values the property for ongoing property tax purposes after the transfer. It has nothing to do with capital gains tax, and the step-up in basis has nothing to do with property taxes.

A home that gets the full step-up in basis for capital gains purposes may still be fully reassessed for property tax purposes under Prop 19 if the heir does not move in within one year. Both rules apply independently, and they can produce very different outcomes. Getting the step-up does not protect you from a Prop 19 reassessment. And avoiding a Prop 19 reassessment by moving in does not give you any additional capital gains benefit beyond the step-up you already received.

"The step-up in basis and Prop 19 are two completely separate rules governing two completely different taxes. Both apply independently."

What the Step-Up Does Not Cover

The step-up in basis is a powerful benefit, but it has limits that heirs need to understand.

Post-Death Appreciation

The step-up only eliminates gain that accrued before the owner's death. If the home continues to appreciate after the date of death, that new appreciation is fully taxable when the heir sells. An heir who inherits a home worth $850,000 and sells it two years later for $920,000 has a taxable gain of $70,000, minus selling costs. The step-up helped enormously on the pre-death appreciation but did not create a permanent tax shelter.

Inherited Rental Property

If the parent claimed depreciation on a rental property, the heir inherits the stepped-up basis but the depreciation history creates a separate exposure called depreciation recapture. The step-up does not eliminate that. This is a situation that genuinely requires a CPA with experience in rental property estates.

Property Held in Certain Trust Structures

Property held in some types of irrevocable trusts may not receive the full step-up. If a parent transferred their home into an irrevocable trust during their lifetime, the tax treatment at death depends on the specific structure of the trust. A CPA or estate attorney should review the trust documents before any decisions are made about selling.

Gifted Property

The step-up only applies to inherited property, not gifted property. If a parent transfers a home to a child as a gift during their lifetime, the child takes the parent's original basis, not the current value. A home gifted at $850,000 current value with a $150,000 original basis means the child holds a $150,000 basis and faces full capital gains exposure on any future sale. This is a meaningful distinction that surprises families who thought a lifetime gift would have the same tax treatment as an inheritance.

What Heirs Need to Do to Protect the Step-Up

The step-up in basis is not automatic in the sense that someone documents and protects it for you. As an heir, there are two things you should do to make sure the benefit is properly established.

Get a Date-of-Death Appraisal

The stepped-up basis equals the fair market value of the property on the date of death, and that value needs to be documented. The most reliable way to establish it is with a formal appraisal conducted by a licensed real estate appraiser, with the valuation date set to the date of death. Without that documentation, the IRS can dispute the value you claim as your basis.

A date-of-death appraisal is not expensive relative to the tax savings it protects. It is one of the first calls worth making when settling an estate that includes real property.

Have a CPA Review the Numbers Before You List

The step-up eliminates most or all of the capital gains tax for many heirs. But every situation has its own details, whether the property was a rental, how title was held, whether a trust is involved, how long the heir holds the property before selling and a CPA who reviews the specific facts before the home is listed can confirm the tax picture and identify anything that needs attention.

Do not assume the tax bill is zero without having someone run the actual numbers. And do not assume it is large without running those numbers either. For most California heirs selling shortly after inheritance, the result is better than they expected. But the only way to know for certain is to have a qualified professional look at the specifics.

If you have inherited a home and are trying to figure out the next steps, I work with families in exactly this situation regularly and I am glad to help think through the real estate side. I can also connect you with a CPA and estate attorney in the area who work regularly with inherited properties if that would be useful.

Important: this post is educational, not legal or tax advice.

The step-up in basis rules described here reflect federal law and California community property rules as of 2026. Individual situations vary significantly based on how title is held, trust structures, rental history, and other factors. Please consult a qualified CPA and estate attorney before making decisions based on this information.

I am happy to refer you to professionals in our area who work regularly with inherited property situations.

Lori Little

Realtor - DRE #01758039

TLC Real Estate / RE/MAX Executive

209-427-1687

lori.little@tlcrealtors.com