What is stepped-up basis?

Stepped-up basis is a federal income tax rule that resets an inherited asset's cost basis to its fair market value on the date the previous owner died. For an inherited California home, it usually erases the gain that built up during the previous owner's lifetime, lowering capital gains tax when the heir sells.

Does California follow the stepped-up basis rule?

Yes. California follows the federal stepped-up basis rule for property inherited after 1986, so the heir's basis becomes the home's value on the date of death. California has no separate capital gains rate, so any remaining gain is taxed as ordinary income at rates from 1 percent to 13.3 percent.

How does stepped-up basis lower capital gains tax on an inherited home?

When you inherit a home, your basis resets to its date-of-death value instead of the original purchase price. If you sell soon after, your taxable gain is only the growth since you inherited, so decades of the previous owner's appreciation are not taxed.

Is stepped-up basis the same as Proposition 19?

No. Stepped-up basis is an income tax rule that affects capital gains when you sell. Proposition 19 is a property tax rule that decides whether a county reassesses an inherited home and raises the yearly property tax bill. They are separate rules, and you plan for each on its own.

Does gifting a home during life keep the stepped-up basis?

No. A home given away during the owner's life carries the owner's original low basis to the recipient, called carryover basis. The recipient inherits the built-in gain and can owe large capital gains tax on a later sale, which is why many families hold appreciated property until death.

Stepped-Up Basis: How It Cuts Capital Gains Tax on an Inherited California Home

Q: Do married couples in California get a bigger step-up in basis?

Often yes. California is a community property state, so when one spouse dies, community property usually receives a full step-up on both halves, not just the deceased spouse's share. That can erase most of the built-in gain when the surviving spouse later sells.

Stepped-up basis is one of the most valuable tax breaks a California family can inherit, yet it is easy to misunderstand. This article explains what the term means, walks through a simple example, and shows how the rule treats a step down in value, a bigger step-up for married couples, and a home given away during life. It also draws a clear line between stepped-up basis and Proposition 19, because the two are different taxes that people often confuse. Every source linked at the end is a government page you can read for yourself.

What "Stepped-Up Basis" Means

Stepped-up basis is a federal income tax rule that resets the cost basis of an inherited asset to its fair market value on the date the previous owner died. Your basis is the number you subtract from a sale price to figure your taxable gain. For a home you buy, the starting basis is roughly what you paid. For a home you inherit, the starting basis is what the home was worth on the date of death, no matter what the previous owner originally paid.

The effect is large. Every dollar the home gained in value during the previous owner's lifetime drops out of your tax picture. You owe capital gains tax only on the growth that happens after you inherit. This rule lives in Section 1014 of the Internal Revenue Code, and California follows it for property inherited after 1986.

A Simple Example

Suppose a mother bought a California home decades ago for $80,000, and it is worth $900,000 on the day she dies. Her son inherits it. His basis is not the old $80,000 purchase price. It steps up to the $900,000 value on the date of death.

Now say the son sells the home a few months later for $910,000. His taxable gain is only $10,000, the growth since he inherited, not the $820,000 the home gained during his mother's life. Had she instead sold the home herself before dying, she would have faced tax on that full $820,000 gain. The step-up erased it.

The Step Can Go Down, Too

The reset works in both directions, so the name can mislead. If a home is worth less on the date of death than the previous owner paid, the basis steps down to the lower value. The heir cannot inherit the old higher basis and claim a paper loss. For most California homes, values have risen over the long run, so a step up is the common result. Still, it helps to know the rule adjusts to the date-of-death value either way.

A Bigger Step-Up for Married Couples in California

California is a community property state, and that gives married couples an extra benefit. When one spouse dies, community property usually receives a full step-up on both halves, not just the half the deceased spouse owned. So the surviving spouse can end up with a new basis equal to the whole home's value on the date of death.

This matters when the survivor later sells. A couple who bought a home long ago may hold a very low original basis, and a full double step-up can wipe out most of the built-up gain at the first spouse's death. How title is held affects the outcome, so this is a good point to confirm with a tax advisor.

Why Giving the Home Away During Life Usually Costs More

Families sometimes think of transferring a home to a child early, as a gift, to simplify matters. For income tax, this often backfires. A home given away during the owner's life carries the owner's original low basis to the child. Tax law calls this a carryover basis, and it means the child inherits the built-in gain instead of shedding it.

Compare the two paths. A child who receives the home at death gets the stepped-up basis and may owe little or no capital gains tax on a prompt sale. A child who receives the same home as a lifetime gift keeps the parent's old basis and can owe tax on decades of appreciation when they sell. This is a major reason many California families hold appreciated property until death rather than gifting it early.

Stepped-Up Basis Is Not Proposition 19

Keep these two rules separate, because mixing them up leads to costly mistakes. Proposition 19 is a property tax rule. It decides whether a county reassesses an inherited home and raises the yearly property tax bill. Stepped-up basis is an income tax rule. It decides how much capital gains tax you owe when you later sell.

You analyze each one on its own. A home can lose its low property tax base under Proposition 19 and still receive a full step-up in basis for income tax. One rule can help you while the other hurts you, so plan for both at the same time.

If You Sell the Home You Inherited

Stepped-up basis often pairs with a second break when an heir moves in and later sells. Under Section 121, an owner who lives in a home as their main residence for at least two of the five years before selling can exclude up to $250,000 of gain, or up to $500,000 for a married couple filing jointly. California follows this federal exclusion.

Remember one California detail on the gain that remains. California has no lower rate for capital gains and taxes them as ordinary income, at rates that currently run from 1 percent to 13.3 percent depending on total income. So even when the federal exclusion and a fresh step-up erase most of the tax, any leftover gain is still ordinary income to the state.

A Practical Habit

Get a written appraisal of the home's value as of the date of death, and keep it. That appraisal fixes your stepped-up basis, and you will want the proof if you sell years later and the county or the tax agencies ask how you set your basis. As of 2026, the stepped-up basis rule remains in effect. Confirm the current rules and dollar figures when your own moment comes, since tax law can change.