Yes, you can set up a trust without your spouse in California, but only your separate property can go into it. California Family Code Section 770 gives a married person the same control over separate property as an unmarried person, including the right to transfer it into a trust without spousal consent.1California Legislative Information. California Family Code 770 – Separate Property Community property is a different story, and a few other rules protect your spouse even when they’re left out of the document entirely.
What Counts as Separate Property
California is a community property state. Under Family Code Section 760, property either spouse acquires during the marriage while living in California is presumed to be community property, owned equally by both.2California Legislative Information. California Code FAM 760 – Community Property Wages, investment gains from those wages, and real estate purchased with marital earnings all fall into this category.
Separate property belongs to one spouse alone. Under Family Code Section 770, that includes anything you owned before the marriage, anything you received during the marriage as a gift or inheritance, and any income those assets generate, such as rent from a pre-marriage rental.1California Legislative Information. California Family Code 770 – Separate Property
The presumption runs toward community property, so if you claim an asset is separate, you carry the burden of proving it. Courts look for documentation that traces the asset back to a separate-property source: bank statements, inheritance records, closing documents from before the marriage. Vague recollections won’t do.
Community Property Is Off-Limits
Family Code Section 1100 prohibits a spouse from gifting community personal property or disposing of it for less than fair value without the other spouse’s written consent.3California Legislative Information. California Family Code 1100 – Management and Control of Community Property If you move community property into a trust on your own, the transfer isn’t effective against your spouse’s half-interest. Probate Code Section 5020 provides that a nonprobate transfer of community property made without the other spouse’s written consent does not affect that spouse’s ownership of their half, and a court can set the transfer aside.4California Legislative Information. California Probate Code 5020 – Consent to Nonprobate Transfer
Keeping Separate Property Separate
The biggest practical risk to a solo trust plan is that the assets you believed were separate have lost that character before you ever fund the trust. Two patterns cause this.
Commingling
Commingling happens when separate funds mix with community funds. Depositing an inheritance into a joint checking account that also receives both spouses’ paychecks is the textbook example. Once the funds blend, tracing what came from where becomes difficult, and a court may treat the entire account as community property. Keep separate property in accounts titled only in your name and funded only with separate-property money.
Transmutation
Transmutation is a formal agreement between spouses to change the character of an asset, such as converting a separate-property rental into community property. Under Family Code Section 852, a transmutation is only valid if it’s in writing, contains an express statement that ownership is changing, and is signed by the spouse whose interest is being reduced.5California Legislative Information. California Family Code 852 – Transmutation Requirements Casual conversation or jointly filing taxes on rental income doesn’t qualify. But if you did sign a written transmutation at some point, that asset may no longer be separate regardless of where it came from.
Before you draft anything, gather the documentation that proves each asset’s origin. Account statements, inheritance records, pre-marriage purchase documents, and the paper trail of any post-marriage transactions involving the asset are what you’d need if the property’s character were ever challenged.
Spousal Protections That Still Apply
Even a properly built separate-property trust runs into a few rules designed to protect a spouse’s interests. Knowing them in advance is how you avoid a surprise after your death.
The Omitted Spouse Rule
If you create a trust and later marry someone who isn’t mentioned in it, California’s omitted spouse statute can override your plan. Under Probate Code Section 21610, a surviving spouse who married you after you executed all of your estate planning documents is entitled to receive the decedent’s half of community property, the decedent’s half of quasi-community property, and a share of separate property equal to what they would have received under intestacy rules, capped at half the value of the separate property in the estate.6California Legislative Information. California Probate Code 21610 – Omitted Spouse
There are exceptions. The rule does not apply if the trust or other documents show you intentionally chose not to provide for the spouse, if you provided for them through transfers outside the trust with evidence that those transfers were meant as a substitute, or if the spouse signed a valid waiver. The cleanest fix if you marry after creating a trust is to update it.
Retirement Accounts
Federal law governs most employer-sponsored retirement accounts and adds spousal protections that California trust law cannot override. Under the Retirement Equity Act of 1984, most employer plans must pay death benefits to the surviving spouse unless the spouse has signed a written waiver, regardless of what your trust says.7Internal Revenue Service. Fixing Common Plan Mistakes – Failure to Obtain Spousal Consent To name your trust (or anyone other than your spouse) as beneficiary of a 401(k) or pension, you need your spouse’s written consent.
IRAs don’t carry the same federal consent requirement, but California’s community property rules may still give your spouse a claim to IRA funds accumulated during the marriage. Listing a retirement account on your trust’s schedule of assets doesn’t accomplish anything on its own; the beneficiary designation and any required spousal consent control.
Creating the Trust Document
Under Probate Code Section 15200, a trust can be created by declaring that you hold property as trustee, by transferring property to another person as trustee during your lifetime, or by transfer at death through a will or other instrument.8California Legislative Information. California Probate Code 15200 – Methods of Creating a Trust Most people building a solo revocable trust use the first method: you draft a document declaring yourself both the initial trustee and the lifetime beneficiary, with instructions for what happens after your death.
The document needs to identify a few things clearly:
- The initial trustee (usually you) and the successor trustee who takes over at your death or incapacity.
- Each beneficiary, by full legal name and relationship to you.
- The separate property going into the trust, with account numbers, legal descriptions for real estate, and other identifying details.
- Distribution instructions specifying who receives what and under what conditions.
If the trust will hold real property, Probate Code Section 15206 requires it to be evidenced by a written instrument signed by the trustee.9California Legislative Information. California Probate Code 15206 – Trust of Real Property California does not require the trust document itself to be notarized to be valid, but notarization is standard practice because it confirms authenticity and makes the document harder to challenge. Any deed transferring real estate into the trust does have to be notarized before the county will record it.
Funding the Trust
A signed trust document that holds nothing accomplishes nothing. Only property legally titled in the trust’s name is governed by the trust’s terms. Everything else passes through probate at your death, which defeats the point of creating the trust.
- For real estate, prepare a new deed (typically a grant deed or quitclaim deed) transferring the property from your name to the trust’s name. The deed must be notarized and recorded with the county recorder.
- For bank and investment accounts, contact each institution to retitle the account in the trust’s name. Most banks handle this in a single visit.
- For vehicles, business interests, and other titled property, each type has its own transfer process. For valuable personal property without formal title, a written assignment to the trust is generally enough.
This is where many solo trusts quietly fail. The document gets signed, the folder goes in a drawer, and the assets never actually move. At death, the untransferred assets end up in probate, and the separate-property trust the person worked to build governs very little of what they owned.