New to California: Does Your Old Estate Plan Still Work?

What’s inside the guide

• Whether an out-of-state trust or will is still legally valid once you move to California
• The assumptions baked into an out-of-state plan that no longer match California law
• How California’s community property system changes the tax math behind your plan
• Why a power of attorney signed in another state may not open doors at a California bank
• A relocation checklist for reviewing your existing documents against California rules

Is an out-of-state trust or will still valid in California?

California generally recognizes wills and trusts that were validly executed under the law of the state where you signed them. Validity is not the same as fit, though. A document built around another state’s ownership rules can carry assumptions, like separate-property defaults, that do not match how California treats what a married couple owns. The real question after a move is not whether the document survives, but whether it still does what you think it does.

How does California’s community property system change the tax math?

California is a community property state, and that status carries a real tax advantage most other states do not offer. Under IRC section 1014(b)(6), when the first spouse dies, both halves of a community property asset receive a step-up in basis to fair market value, not just the half that belonged to the spouse who died. Under joint tenancy, the more common structure in many other states, only the deceased spouse’s half gets that step-up. A plan that was never restructured to hold assets as community property can leave that benefit on the table.

Will an out-of-state power of attorney work at a California bank?

Not reliably. Banks and other institutions are often reluctant to honor a power of attorney drafted under another state’s form or language, even when the document remains technically valid. That hesitation shows up at the worst possible time, when someone is trying to act on your behalf and gets turned away at the counter. The fix is to have the document reviewed against California practice before you need it, not after.

For a broader look at how these documents fit together in California, see our estate planning overview.