If you recently lost your spouse and you are weighing whether to sell the family home, you have probably been warned about capital gains tax. In California, that warning is often wrong based on the rules related to the California Step-up in Basis.
California rules often change that answer at the first spouse’s death. The community property tax basis of the entire home generally resets to its date-of-death value. Decades of appreciation can disappear for tax purposes in a single moment.
I hold an LL.M. in Taxation and have practiced California estate planning for roughly two decades. I have sat with a lot of surviving spouses bracing for a tax that, in California, frequently is not there.
This article explains what a step-up in basis is and why California gives a larger break than most states. It also covers how the way you hold title can quietly cost you half of that break. The two-year window every surviving spouse should know is covered below. This post is part of our complete guide to California trusts.
Key Takeaways on the California Step-Up in Basis
- A step-up in basis resets an asset’s tax cost to its fair market value on the owner’s date of death under IRC 1014.
- Because California is a community property state, the entire home basis generally steps up at the first spouse’s death, not just the deceased spouse’s half.
- Joint tenancy title can forfeit half of that benefit. Community property with right of survivorship, or a properly drafted trust, generally preserves it.
- A surviving spouse may generally use the full $500,000 home-sale exclusion if the home sells within two years of the death, under IRC 121(b)(4).
- Step-up in basis is a federal income tax rule. Proposition 19 is a California property tax rule. They are not the same thing.
What Is a California Step-Up in Basis?
A step-up in basis resets the tax cost of an asset to its fair market value on the date the owner dies, under IRC 1014. Capital gains tax is charged on the sale price minus the basis. A step-up can therefore erase decades of appreciation, so a home sold soon after death often produces little or no capital gain.
The arithmetic is easier than the label suggests. Say a San Diego County couple bought their home in 1988 for $200,000. The home is worth $1,200,000 when the first spouse dies.
Before the death, that home carries $1,000,000 of built-in gain. A step-up to $1,200,000 generally wipes out that gain for tax purposes if the home sells near that value.
The governing authority is IRC 1014, basis of property acquired from a decedent. The One Big Beautiful Bill Act (OBBBA) left IRC 1014 in place. There is no sunset and no repeal of the step-up to plan around.
One scope note before going further. The step-up is a federal income tax rule about capital gains. California has no state estate tax, no inheritance tax, and no gift tax. The step-up is also not the same thing as Proposition 19, which is covered below.
Important: Retirement Accounts Do Not Step UpA step-up applies to capital assets such as a home, a rental property, or a brokerage account. It does not apply to a traditional IRA or a 401(k). Those accounts are taxed as ordinary income to the beneficiary when withdrawn. Readers routinely assume a retirement account steps up at death. It does not. If a large share of your estate sits in retirement accounts, the planning questions are different, and your CPA should be part of that conversation. |
Why California Gives a Bigger Break: The Community Property Double Step-Up
In most states, only half of a jointly owned home steps up when the first spouse dies. The deceased spouse’s half resets to date-of-death value. The surviving spouse’s half keeps its old, often much lower, basis.
California works differently. California is a community property state under California Family Code Section 760. For a home characterized as community property, the entire basis generally steps up to date-of-death value at the first spouse’s death, under IRC 1014(b)(6).
That is the community property double step-up. Both halves reset, including the half the surviving spouse already owned.
For a surviving spouse in San Diego County, the practical effect is large. A home that appreciated for thirty years can often be sold shortly after a spouse’s death with little or no capital gains tax.
California Compared With a Common-Law State
| Question | California (community property) | Common-law state |
| What steps up at the first death? | Both halves of the home generally step up. | Generally only the deceased spouse’s half. |
| Effect on built-in gain | Gain built up during the marriage is usually eliminated. | Gain is usually cut roughly in half. |
| Result for a surviving spouse who sells | Often little or no capital gain on a near-term sale. | A meaningful capital gain frequently remains. |
Treatments in this table are general and depend on how the property is characterized and titled.
Two honest limits belong here. First, appreciation after the date of death is still taxable when the home sells. Second, the double step-up depends on the property being characterized as community property.
That second point is where title comes in, and it is the part most couples never examine.
From Our Carlsbad Office We frequently reassure a surviving spouse that the capital gains bill they are dreading may not exist. When the home was community property, the basis usually reset in full on the day their spouse died. Thirty years of appreciation often disappears for tax purposes in a single moment. |
How You Hold Title Decides Whether You Get the Full Step-Up
The double step-up is not automatic. It generally depends on the home being community property. The words on the deed can preserve that character or quietly forfeit half the benefit.
California recognizes four common ways for a married couple to hold title to a home. Each one carries a different tax consequence at the first death.
- Community property. Generally qualifies for the full double step-up. Standing alone, it does not avoid probate at the second death without a trust or a survivorship feature.
- Community property with right of survivorship. Created under California Civil Code Section 682.1. This form generally combines the full double step-up with automatic transfer to the survivor, outside probate.
- Joint tenancy. The common trap. Joint tenancy avoids probate, but the halves may be treated as separate property. The survivor can then receive only a half step-up, unless the home is shown to be community in character.
- Tenancy in common. No survivorship right. Generally only the deceased owner’s share steps up, and that share passes under the will or by intestacy.
The trust question follows directly. A properly drafted California revocable living trust can hold the home as community property. That structure generally preserves the double step-up and avoids probate at both deaths. This is a core reason California couples use a trust instead of joint tenancy title.
What We See in First Meetings One of the most common and most expensive things we see is a long-married Carlsbad couple holding their home in joint tenancy because a title officer set it up that way in the 1990s. It avoids probate. It can also cost the survivor half of the step-up. Correcting title while both spouses are living is usually a straightforward fix. After the first death, it is generally too late. |
The Surviving Spouse Home-Sale Exclusion and the Two-Year Window
Under IRC 121, a married couple can generally exclude up to $500,000 of gain on the sale of a primary residence. A single filer can generally exclude up to $250,000. A surviving spouse may still claim the full $500,000 exclusion if the California home sells within two years of the death, under IRC 121(b)(4). The other IRC 121 requirements must also be met.
These two rules stack in the survivor’s favor. In California, the double step-up often erases the gain by itself, so the exclusion may never be needed. Where post-death appreciation or a partial step-up leaves some gain, the two-year $500,000 window can matter. The IRS explains the rules in Publication 523, Selling Your Home.
A word about pace. The two-year window is worth knowing, but it is rarely a reason to rush a sale in the first weeks after a loss.
What does deserve early attention is documentation. A date-of-death appraisal is what fixes the stepped-up basis in the record. That appraisal belongs to a qualified appraiser, and the gain calculation belongs to your CPA. Neither is work Opelon LLP performs. Our estate planning guidance for widows and widowers walks through the wider set of first-year tasks.
Step-Up in Basis Is Not Prop 19
Readers merge these two rules constantly, and so do many national articles. They are different taxes, triggered by different events, administered by different agencies.
Step-up in basis is a federal income tax rule. It lowers the capital gain you report when you sell. Proposition 19 is a California property tax rule. It governs the assessed value the county uses for your annual property tax bill.
Here is the point that reassures most surviving spouses. A transfer between spouses, including a transfer at the first spouse’s death, is generally excluded from California property tax reassessment. The survivor usually keeps the existing low property tax base. At the same time, the home generally receives the federal basis step-up. The California State Board of Equalization publishes the current guidance.
Proposition 19 generally bites later, when a home passes to children or leaves the family, not at the first spouse’s death. Our post on Prop 19 and inherited property in California covers those rules in detail.
What This Means When You Sell the Family Home
Put the pieces together for a surviving spouse deciding whether and when to sell a California home. The double step-up has likely already reset the basis. The interspousal exclusion has likely protected the property tax base.
The two-year $500,000 exclusion sits behind both as a backstop, not a starting gun. In our experience with San Diego County families, the capital gains fear is usually larger than the actual bill.
Two tasks genuinely matter, and both are referrals rather than legal work. Get a date-of-death appraisal so the stepped-up basis is documented. Then have a CPA run the numbers before the home is listed.
One honest ceiling. A step-up helps at the first death, and again for the survivor’s share of later appreciation at the second death. It does not make a home tax-free forever. Appreciation after the date of death is taxable, and the exclusion drops to $250,000 once the two-year window closes.
Frequently Asked Questions
Yes. A California home generally receives a step-up in basis to its fair market value on the owner’s date of death under IRC 1014. For a home held as community property, the entire home generally steps up at the first spouse’s death, not only the deceased spouse’s half.
The community property double step-up resets both halves of a California community property asset to date-of-death value under IRC 1014(b)(6). The trigger is the death of the first spouse. The surviving spouse’s own half steps up along with the deceased spouse’s half.
Often little or none, though the answer depends on your facts. If the California home was community property, the full basis generally reset to date-of-death value when your spouse died. Gain built up during the marriage is usually eliminated. Appreciation after the date of death is still taxable, and gain above the applicable IRC 121 exclusion is taxable as well. California also taxes that gain as ordinary state income. Have a CPA calculate the number before you list the home.
There is no single right answer, and the choice deserves a review of your deed and your estate plan. Joint tenancy avoids probate at the first death. The halves may be treated as separate property, which can limit the survivor to a half step-up. Community property generally supports the full double step-up but does not by itself avoid probate. Community property with right of survivorship, under California Civil Code Section 682.1, generally offers both. A revocable living trust is often the cleaner solution for a California couple.
Community property with right of survivorship is a California title form created under Civil Code Section 682.1. It generally combines the full community property double step-up with automatic transfer of the home to the surviving spouse, without probate at the first death.
Generally two years from the date of your spouse’s death. Under IRC 121(b)(4), a surviving spouse who has not remarried may claim the full $500,000 exclusion within that period. The other IRC 121 requirements must also be met. After two years, the exclusion generally drops to $250,000.
No. Step-up in basis is a federal income tax rule that lowers capital gain when property is sold. Proposition 19 is a California property tax rule that governs assessed value for the annual tax bill. A transfer between spouses is generally excluded from reassessment, so a surviving spouse usually keeps both breaks.
Generally no. A properly drafted California revocable living trust can hold a home as community property and preserve the double step-up. Some older trusts split assets in ways that may not preserve community property character, so a trust drafted years ago is worth reviewing.
No. Traditional IRAs and 401(k) accounts do not receive a step-up in basis. Those accounts are taxed as ordinary income to the beneficiary when funds are withdrawn. That treatment is very different from a home or a brokerage account, which generally do step up at death.
No. California imposes no state estate tax, no inheritance tax, and no gift tax. The tax a California family should understand is the capital gains tax on a later sale. The step-up in basis is what reduces that gain.
Related Guides
What California Families Should Do Now
The right next step depends on where you are.
- If you are married and own a California home. Find out how you actually hold title. If the deed says joint tenancy, ask whether community property with right of survivorship would better protect the survivor. This is usually a simple fix while both spouses are living.
- If your home is already in a living trust. Confirm the trust preserves community property character so the double step-up is not lost. Not every older California trust does.
- If you have recently lost a spouse. Get a date-of-death appraisal to document the stepped-up basis, note the two-year exclusion window, and loop in a CPA before selling. Do not rush the decision.
Opelon LLP helps California families structure title and trusts so a surviving spouse keeps the full community property step-up. For the appraisal, the gain calculation, and the tax return, we will point you to the appraiser and CPA who should own that piece. From our Carlsbad office we work with families across San Diego County and throughout California. You can reach a San Diego estate planning attorney at our firm, or request a free estate planning consultation in Carlsbad.
