In California, you can set up a trust without your spouse, but only your separate property can go into it. Family Code Section 770 lets a married person transfer separate property without spousal consent, giving you the same authority over it that an unmarried person would have.1California Legislative Information. California Family Code 770 – Separate Property The harder work is proving that the assets you want to move actually qualify as separate, and understanding the spousal protections that apply even when your spouse is nowhere in the document.
What Counts as Separate Property
California is a community property state. Under Family Code Section 760, everything either spouse acquires during the marriage while living in California is presumed to belong to both of you equally.2California Legislative Information. California Code FAM 760 – Community Property Wages, investment gains from those wages, and real estate bought with marital earnings all fall into that bucket.
Separate property is narrower. Under Family Code Section 770, it covers what you owned before the marriage, anything you received during the marriage as a gift or inheritance, and the income those assets produce, such as rent from a rental property you owned before the wedding.1California Legislative Information. California Family Code 770 – Separate Property
The presumption tilts toward community property. If you claim an asset is separate, the burden of proving it is yours, and courts look for documentation: bank statements, account records, and a clean paper trail back to the asset’s origin. Memory won’t do it.
What You Cannot Put in the Trust Alone
Community property is off the table without your spouse’s written consent. Family Code Section 1100 prohibits one spouse from gifting community personal property or disposing of it for less than fair value without the other spouse’s written agreement.3California Legislative Information. California Family Code 1100 – Management and Control of Community Property Even if you move community property into a solo trust anyway, the transfer doesn’t bind your spouse’s half. 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 interest, and a court can set the transfer aside.4California Legislative Information. California Probate Code 5020 – Consent to Nonprobate Transfer
Keeping Separate Property Actually Separate
The biggest threat to a solo trust plan is losing the separate character of your assets before you ever fund the trust. Two problems cause most of the trouble.
Commingling
Commingling happens when separate funds get mixed with community funds. The textbook example is depositing an inheritance into a joint checking account that also receives both spouses’ paychecks. Once the money is blended, tracing becomes difficult, and a court may treat the whole account as community property. Keep separate property in accounts titled only in your name, funded only with separate-property money.
Transmutation
Transmutation is a formal agreement between spouses that changes the character of an asset. You might, for instance, agree to convert a separate-property rental home into community property. Under Family Code Section 852, a transmutation is only valid if it is 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 conversations don’t count, and neither does jointly filing taxes on rental income. But a written transmutation you signed years ago can quietly reclassify an asset you still think of as yours alone.
Before you draft anything, gather the paperwork: account statements showing origin, inheritance records, pre-marriage purchase documents, and any post-marriage transactions touching the asset. That’s the evidence you’d need if the property’s character were ever challenged.
If You Marry After Creating the Trust
Here’s a scenario people miss. You create the trust, then marry someone new later. Your new spouse isn’t named anywhere. 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, and who wasn’t provided for, is entitled to 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, capped at half the value of the separate property in the estate.6California Legislative Information. California Probate Code 21610 – Omitted Spouse That can claim a large piece of what you put in the trust.
The rule doesn’t 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 those transfers were meant as a substitute, or if the spouse signed a valid waiver. Marrying after you’ve done your estate planning is a signal to update the trust.
Retirement Accounts Follow Federal Rules
401(k)s and pensions live under federal law, which adds spousal protections that California trust law cannot override. Under the Retirement Equity Act of 1984, most employer-sponsored retirement 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
Naming your trust (or anyone other than your spouse) as beneficiary of a 401(k) or pension requires your spouse’s written consent to that designation. IRAs don’t carry the same federal spousal consent requirement, though California 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 accomplishes nothing on its own; the beneficiary designation and any required consent have to be handled separately with the plan administrator.
How to Set Up the Trust
Under Probate Code Section 15200, one way to create a trust is to declare that you hold property as trustee for yourself.8California Legislative Information. California Probate Code 15200 – Methods of Creating a Trust Most solo trusts work this way: you draft a document naming yourself as initial trustee and lifetime beneficiary, with a successor trustee and distribution instructions that take effect at your death or incapacity.
The Document
The trust document needs to identify your successor trustee, name your beneficiaries by full legal name and relationship, inventory the separate property going in with enough detail to identify each asset (account numbers, legal descriptions for real estate), and spell out who receives what and under what conditions.
If the trust will hold real property, Probate Code Section 15206 requires the trust to be evidenced by a written instrument signed by the trustee.9California Legislative Information. California Probate Code 15206 – Trust of Real Property California doesn’t require the trust document itself to be notarized for validity, but notarization is standard practice because it confirms authenticity and makes the document harder to challenge later. The deed transferring real estate into the trust does have to be notarized before the county will record it.
Funding
A signed trust does nothing until you move assets into it. Only property titled in the trust’s name is governed by the trust’s terms; anything else passes through probate at your death.
- For real estate, prepare a new deed (typically a grant deed or quitclaim deed) transferring the property from your name to the trust, have it notarized, and record it with the county recorder. County recording fees vary but are generally modest.
- 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, follow the specific transfer process for that asset type. For valuable personal property without formal title, a written assignment to the trust is generally enough.
Funding is where most trusts fail in practice. People sign the document, assume the job is done, and the unfunded assets end up in probate anyway.
Why Do This
The most common reason is avoiding probate. Property held in trust at your death doesn’t pass through California’s formal court estate process; your successor trustee distributes it directly to beneficiaries, saving time and cost. A trust also gives you an incapacity plan: rather than your family petitioning for a conservatorship, your successor trustee steps in and manages the trust assets. And probate proceedings are public record in California, while a properly funded trust stays out of the court file, keeping your assets and beneficiaries private.
The legal right to create this kind of trust without your spouse’s involvement is clear. The work is in making sure every asset genuinely qualifies as separate property and that you’ve accounted for the spousal protections California and federal law apply whether you planned for them or not.