The exclusion cap: moving in doesn't always freeze everything

Even when an heir moves in on time and files correctly, Prop 19 caps how much value is protected.

The math: take the parent's old taxable value and add the cap (it started at $1,000,000 in 2021 and adjusts every two years; it's currently a bit higher). If the home's market value at death is under that sum, the child keeps the parent's taxable value exactly.

If the market value is higher, the amount above the cap gets added to the taxable value. Example with round numbers: parent's taxable value $200,000, cap $1,000,000, market value at death $1,900,000. The threshold is $1,200,000; the home is $700,000 over; the child's new taxable value is $200,000 + $700,000 = $900,000. Better than $1.9M — but the tax bill still roughly quadruples.

On much of coastal Orange County, the cap is the rule rather than the exception. Getting the actual numbers for a specific property takes about a day — the home's assessed value is public, and its market value can be estimated professionally.

General education, not advice — verify anything you’ll rely on with a CPA or estate attorney.