Community Property vs. Separate Property in Trust Administration

Community property is anything a married couple acquired while living in California during the marriage, other than by gift or inheritance, and both spouses own the whole thing equally. Separate property is anything owned before the marriage, or received by gift or inheritance, or bought with funds traceable to one of those sources. Before a trustee distributes a single dollar, that distinction has to be sorted out, because it changes who owns what, what gets taxed, and what the surviving spouse is actually entitled to.

It sounds like an academic distinction until someone gets it wrong. Misclassify an asset and a trustee can misstate the tax basis, shortchange a surviving spouse out of property they already owned, or hand a beneficiary money that was never the deceased spouse’s to give away in the first place. None of those are small mistakes, and unwinding them later comes with interest, legal fees, and sometimes a breach of fiduciary duty claim.

Why nobody thinks about this until someone dies

Most married couples in California never separate “his” money from “her” money from “our” money while they’re both alive. Everything sits in the same trust, the same accounts, the same house. There’s no reason to draw the line day to day, because it doesn’t matter yet. Then one spouse dies, and the line matters enormously, because half of everything already belonged to the survivor and never becomes part of the trust administration at all.

What community property actually means

Under California Family Code section 760, everything a married couple acquires while living in California, other than by gift or inheritance, is community property. It doesn’t matter whose paycheck bought it or whose name is on the deed. If it was earned or bought during the marriage with marital funds, both spouses own the whole thing, not half each of two separate piles. A house bought during the marriage with wages from either spouse’s job is community property even if only one spouse’s name is on the title.

What separate property means

Separate property, under Family Code section 770, is anything owned before the marriage, anything received during the marriage by gift or inheritance, and anything bought with money that traces back to one of those sources. If a spouse inherited $150,000 from a parent in 2010 and used it, untouched, to buy a rental property, that rental property is separate property, as long as it wasn’t mixed with community funds along the way.

The trust itself doesn’t answer the question

A revocable trust can hold both community and separate property inside the same set of accounts. The trust is just a container. What’s inside it keeps its original character unless the spouses did something specific to change that, most commonly a valid transmutation agreement, which we cover in transmutation agreements and trust property in California. Putting an asset into a joint trust does not, by itself, convert one spouse’s separate property into community property.

Why this determines what the surviving spouse gets

When the first spouse dies, the surviving spouse already owns their half of every community property asset. They owned it before death. They don’t inherit it, and it doesn’t pass through the trust’s distribution scheme at all. What passes through the trust is the deceased spouse’s half of the community property, plus all of the deceased spouse’s separate property, according to whatever the trust says.

Say a couple has a $1,000,000 brokerage account, entirely community property, built from both spouses’ careers. When one spouse dies, $500,000 of that account was already the surviving spouse’s. It doesn’t get distributed under the trust’s terms at all, it just stays theirs. The other $500,000 is the deceased spouse’s half, and that’s what the trust actually controls, whether it goes outright to the surviving spouse, into a bypass trust, or to children. A trustee who treats the whole $1,000,000 as trust property to be divided according to the trust’s distribution scheme has just made a serious mistake, potentially distributing $500,000 that was never available to distribute. For the fuller breakdown of what a surviving spouse is entitled to and when, see our guide to surviving spouse rights in trust administration, and our page on whether a surviving spouse can change the trust after the first death.

Why this determines the tax basis

This is where characterization has real dollar consequences, not just legal ones. Under Internal Revenue Code section 1014(b)(6), when one spouse in a community property state dies, the entire community property asset gets a stepped-up basis to fair market value as of the date of death, not just the deceased spouse’s half.

Compare that to separate property, or to property in a common-law state, where only the deceased owner’s share gets the step-up. Say a married couple bought a rental property in 1995 for $200,000, and it’s worth $900,000 when the first spouse dies. If it’s correctly characterized as community property, the entire basis resets to $900,000, and $700,000 of appreciation disappears from any future capital gains calculation. If it’s misclassified as separate property, or the community character is never documented, only half the step-up applies, the basis might reset to only $550,000 ($100,000 original basis on the surviving spouse’s un-stepped half, plus $450,000 stepped-up on the deceased spouse’s half), and the surviving spouse could be sitting on a capital gains bill roughly $350,000 higher than it needed to be when they eventually sell. Our page on stepped-up basis in California trusts walks through the mechanics in more detail, and community property step-up vs. separate property compares the two side by side.

How trustees actually figure this out

In practice, characterization starts with documents: when was the asset acquired, what funds paid for it, is there a deed, a title, an account statement showing the acquisition date. California presumes property acquired during marriage is community property under Family Code section 760, so the burden falls on whoever claims an asset is separate to prove it, not on the trustee to disprove it.

That proof gets harder the longer a couple has been married and the more their accounts have been combined. A trustee administering an estate where the couple was married 40 years, refinanced the house twice, and rolled three old retirement accounts into one IRA has real work to do before making any distribution. We walk through the actual tracing mechanics, including what happens when separate funds get mixed into a joint account, in how trustees characterize and trace assets after death and in commingled assets in trust administration.

What this means for the trust administration timeline

Characterization isn’t a box to check once at the start. It affects the trust accounting, the tax returns, the Schedule K-1s if there’s a business involved, and the final distribution schedule. Trustees who skip this step, or who assume the trust document already settled it, tend to reopen the whole administration when a beneficiary’s CPA or attorney asks a pointed question six months later, usually after distributions have already gone out and are much harder to unwind.

The honest caveat

Characterization is often clean and often is not. A house bought before marriage and paid down with community income for twenty years isn’t cleanly one or the other, it’s a mixed asset requiring its own reimbursement calculation. Records from thirty years ago frequently don’t exist. And even with good documentation, reasonable people, including opposing counsel, can disagree about what the paper trail actually proves. This isn’t a rule you apply once and move on from. It’s a fact-intensive process that rewards patience and good records, and punishes assumptions.

Talk to a real California estate attorney

If you’re serving as trustee and you’re not sure whether an asset is community or separate property, that’s the first question to get answered, not the last. I’ll look at what the trust holds and the records you have, and tell you what’s clean, what needs tracing, and what needs to wait.

Talk to Eric Ridley is a free 60-minute consultation by phone or Zoom, anywhere in California. Or call (805) 244-5291. You’ll leave knowing where you stand, whether or not you hire me.

Frequently asked questions

What’s the difference between community property and separate property in California?

Under Family Code section 760, anything a married couple acquires while living in California during the marriage, other than by gift or inheritance, is community property owned equally by both spouses. Separate property, under section 770, is anything owned before marriage, received by gift or inheritance, or bought with funds traceable to one of those sources.

Why does a trustee need to figure out which is which?

Because it determines what actually passes through the trust. A surviving spouse already owns their half of every community property asset and doesn’t inherit it. Only the deceased spouse’s half of community property, plus all of the deceased spouse’s separate property, passes according to the trust. Misclassify an asset and the trustee can shortchange the surviving spouse or distribute money that was never the decedent’s to give.

How does characterization affect the stepped-up basis?

Under IRC section 1014(b)(6), when one spouse dies, an entire community property asset gets a stepped-up basis to fair market value, not just the deceased spouse’s half. Separate property, or community property in a common-law state, only gets a step-up on the deceased owner’s share. Misclassifying community property as separate can leave a surviving spouse with a much larger capital gains bill on a later sale.

Who has the burden of proving an asset is separate property?

California presumes property acquired during marriage is community property under Family Code section 760. Whoever claims an asset is actually separate property, whether that’s a beneficiary or the trustee, carries the burden of proving it with documentation: acquisition dates, funding sources, deeds, and account records.

Can a trust document override the community or separate property character of an asset?

Not by itself. A revocable trust is just a container, and assets inside it keep their original community or separate character unless the spouses did something specific to change it, such as a valid transmutation agreement. The trust holding an asset doesn’t answer the characterization question on its own.

This is general information about California law, not legal advice for your situation.

Community Property vs. Separate Property in Trust Administration