A Trust Doesn't Solve Prop 19: What Families Need to Know About Inherited Property Taxes
If you've done your estate planning, you've probably heard that a trust keeps your family out of probate court. That's true. What a trust doesn't do is protect your children from a property tax reassessment when they inherit your home — and in the Bay Area, where a home bought decades ago can carry a very low assessed value, that's often the more expensive surprise.
What Prop 19 Actually Changed
For transfers before February 16, 2021, California let parents pass a principal residence to their children with no property tax reassessment and no value limit, regardless of what the child did with the home afterward. Proposition 19 narrowed that considerably. For transfers on or after February 16, 2021, the parent-child exclusion applies only if:
The home was the parent's principal residence, and it becomes the child's principal residence. Rentals, vacation homes, and second properties get no exclusion at all.
The child moves in within one year of the transfer, and files for the homeowners' or disabled veterans' exemption within that same year.
The value falls within the parent's factored base year value plus $1,044,586. That figure applies to transfers from February 16, 2025 through February 15, 2027; the Board of Equalization recalculates it every two years, with the next change effective February 16, 2027.
The child also has to file Form BOE-19-P with the county assessor to claim the exclusion. It isn't automatic.
How the Cap Actually Works
This is the part that gets described incorrectly most often. If the home's market value at transfer exceeds the value limit, the excess is added to the parent's factored base year value — that sum becomes the new assessed value. Nothing is prorated or split.
A Realistic Example
Say the parents' home has a factored base year value of $400,000, and it's worth $2.5 million when it passes to their child.
Value limit: $400,000 + $1,044,586 = $1,444,586
Market value exceeds that limit by: $2,500,000 − $1,444,586 = $1,055,414
New assessed value: $400,000 + $1,055,414 = $1,455,414
So the child is assessed on roughly $1.46 million instead of the full $2.5 million — real protection, but a long way from the parents' $400,000. Property tax runs 1% of assessed value plus voter-approved local levies, so the annual bill rises substantially even though the exclusion applied. And if the child doesn't move in within a year, none of it applies and the home is reassessed at full market value.
Why "I Have a Trust" Doesn't Answer This
A revocable living trust controls how your home passes — to whom, on what terms, without a probate proceeding. It does not change how the county assessor treats the transfer. Whether the home is held in a trust or passes by will, Prop 19's rules apply the same way. Holding real property in a trust is a probate and control strategy, not a property tax strategy.
What This Means for Your Planning
This isn't a reason to panic, and it isn't something a will or trust alone can fix. It's a reason to know your numbers: your home's current assessed value, what it's likely worth today, and whether the people who will inherit it actually intend to live in it. Those answers change what planning makes sense — including whether anything is worth doing before a transfer happens.
If you haven't looked at this since Prop 19 took effect, or you assumed your trust already covered it, it's worth a conversation. Book a Discovery Call and we'll walk through what your specific numbers mean for your family.