The Prop 19 Value Cap: How Partial Reassessment Works on an Inherited Home

Under Proposition 19, a child who inherits the family home and moves in keeps the parent's low property tax base only up to a ceiling called the value limit. The value limit equals the home's factored base year value plus an inflation-adjusted exclusion amount, currently $1,044,586 for transfers from February 16, 2025 through February 15, 2027. If the home's market value at transfer sits at or below that limit, nothing changes. If it sits above, the excess is added to the low base, and the child pays tax on the higher figure. That outcome is a partial reassessment, and it is far better than losing the exclusion entirely.

Key Facts

• Qualifying for the family home exclusion does not fully protect a valuable home. Proposition 19 caps how much value passes at the low base.

• The value limit equals the factored base year value plus the indexed exclusion amount.

• The indexed exclusion amount is $1,044,586 for transfers from February 16, 2025 through February 15, 2027. The next adjustment takes effect February 16, 2027.

• Market value at or below the value limit means no increase. Market value above it means the excess is added to the low base.

• A shortcut for homes over the limit: the new taxable value equals market value minus the indexed exclusion amount.

• When several children inherit together, only the child who makes the home their principal residence keeps the low base, and only on their share.

Why Can a Qualifying Family Home Still Be Reassessed?

Because the exclusion has a ceiling. Moving into the inherited home satisfies the conditions covered in Chapter 8, but satisfying them does not shelter unlimited value.

This is a real break from the old rules. Under Proposition 58, a family home passed with its low base fully intact whether it was worth $400,000 or $4 million. Proposition 19 kept the family home exclusion and placed a cap on it, so very valuable homes no longer pass entirely at the parent's old assessed value.

The result is a partial reassessment. The child keeps the low base on part of the home's value and picks up a higher assessment on the rest.

What Is the Prop 19 Value Limit?

The value limit is the ceiling, and it has two parts added together.

The first part is the home's factored base year value, which is the parent's Proposition 13 assessed value as adjusted over the years. The second part is an indexed exclusion amount set by the state.

Add those two figures and you have the value limit for that specific home. The limit is different for every property, because every property has a different base year value.

What Is the Current Exclusion Amount?

The indexed exclusion amount started at $1 million when Proposition 19 took effect and rises over time. The California State Board of Equalization recalculates it every other year using the Federal Housing Finance Agency's House Price Index for California.

The amounts to date:

• $1,000,000 for transfers from February 16, 2021 through February 15, 2023

• $1,022,600 for transfers from February 16, 2023 through February 15, 2025

• $1,044,586 for transfers from February 16, 2025 through February 15, 2027

Use the amount in effect on the date of transfer, not the amount in effect when you run the numbers. The next adjustment arrives February 16, 2027, so confirm the figure before relying on it for a transfer near that date.

How Do You Calculate the New Taxable Value?

The rule has two branches, and which one applies depends on how the market value compares to the value limit.

If the home's market value at transfer is at or below the value limit, there is no increase. The child keeps the full low base.

If the market value is above the value limit, the amount above the limit is added to the low base. That sum becomes the new taxable value.

There is a shortcut worth knowing. Once a home exceeds the ceiling, the arithmetic collapses to a single step: the new taxable value equals the home's market value minus the indexed exclusion amount. The child effectively shelters $1,044,586 off the top and pays tax on everything else.

A Worked Example

A family home has a factored base year value of $400,000 and a market value at transfer of $1,900,000. The child moves in within the one-year window and qualifies for the exclusion.

• Step 1. Value limit: $400,000 + $1,044,586 = $1,444,586

• Step 2. Excess over the limit: $1,900,000 − $1,444,586 = $455,414

• Step 3. New taxable value: $400,000 + $455,414 = $855,414

The shortcut confirms it: $1,900,000 − $1,044,586 = $855,414.

Is a Partial Reassessment Still Worth It?

Yes, and the gap is large.

Continue the example at the basic one percent tax rate. With the exclusion, the child's taxable value is $855,414 and the annual tax runs roughly $8,554. Without moving in and claiming the exclusion, the home is reassessed to its full market value of $1,900,000, and the annual tax runs roughly $19,000.

The cap did not erase the benefit. It left the child paying tax on about $855,000 of value instead of $1,900,000, a saving of more than $10,000 every year for as long as the child owns the home.

So the cap is a reason to plan carefully, not a reason to give up on the exclusion. For a modest family home worth less than the value limit, the child may see no increase at all.

What Happens When Several Children Inherit Together?

The exclusion and the cap apply to each qualifying owner's share, which matters whenever siblings inherit as co-owners.

Picture two siblings inheriting a home equally. One moves in and claims the homeowners' exemption. The other lives out of state and does not. The sibling who moves in keeps the low base on their half, subject to the cap. The other sibling's half is reassessed to market value.

The family keeps part of the benefit rather than all of it. These situations grow complicated quickly, especially when one sibling buys out another or the home passes through a trust. Chapter 11 covers those change-in-ownership traps in detail.

Summary

• A qualifying family home is not fully protected. Proposition 19 caps how much value passes at the parent's low base.

• The value limit equals the factored base year value plus the indexed exclusion amount.

• That amount is $1,044,586 for transfers from February 16, 2025 through February 15, 2027, with the next adjustment due February 16, 2027.

• Market value at or below the value limit produces no increase. Market value above it means the excess is added to the low base.

• For a home over the limit, the new taxable value equals market value minus the indexed exclusion amount.

• A partial reassessment still saves far more than a full one, so qualifying is worthwhile even for a high-value home.

• When several children inherit, only the one who makes the home their principal residence keeps the low base, and only on their share.

Get the Full Picture

Read the book. Prop 19 Hero works through the inheritance math step by step, including the value cap, the filing deadlines, and the planning moves families can still make before a transfer happens. Find it on Amazon.

Talk to Bart. If you are in the Sacramento area and want to run these numbers against a specific property, Bart Hubbard can walk you through the situation. Reach out at Prop19Hero.com.

About the Author

Bart Hubbard is a California real estate associate at HomeSmart ICARE Realty (DRE #01815497) and a C.A.R. Certified Probate & Trust Specialist. He wrote Prop 19 Hero to give California homeowners 55 and older a clear, practical guide to the property tax rules that affect every move they make. He works with buyers and sellers throughout the Sacramento area. Reach him at [email protected] or www.prop19hero.com.