Fidelity Prop 19 Calculator: estimate the new tax base
Estimate the property taxes on a Prop 19 base transfer before your client commits to the move.
What does Prop 19 Calculator do?
- Estimates property taxes under Proposition 19 in seconds
- Built for base-value transfers, not generic tax math
- Useful in listing appointments with 55+ sellers
- Pairs with the county assessor's official claim forms
How do I use Prop 19 Calculator?
- 1Open fidelityprop19.com.
- 2Enter the current home's assessed value (from the tax bill, not the market value).
- 3Enter the expected sale price of the current home.
- 4Enter the purchase price of the replacement home.
- 5Read the estimated new tax base and annual tax.
- 6Send the client to the LA County Assessor to file the actual claim — the calculator is an estimate, not a filing.
Prop 19 in one paragraph
Proposition 19 lets homeowners who are 55 or older, severely disabled, or victims of a wildfire or natural disaster transfer their existing property tax base to a replacement home anywhere in California, up to three times. If the replacement costs more, the difference is added to the transferred base. It also narrowed the parent-child exclusion: inherited property generally keeps its low base only if the child makes it their principal residence, and even then a value cap applies.
Why it matters on the Westside and in the South Bay
In neighborhoods where a longtime owner in El Segundo, Torrance, or Mar Vista may be paying tax on a 1980s base, Prop 19 is often the single factor deciding whether they sell at all. Running the number in front of them turns an abstract fear into a specific figure.
Team Goeglein sets agents up with this tool across the South Bay and Westside of Los Angeles — Manhattan Beach (90266), Hermosa Beach (90254), Redondo Beach (90277/90278), El Segundo (90245), Torrance (90503–90505), Palos Verdes (90274/90275), Culver City (90230/90232), Playa Vista (90094), Mar Vista, Venice (90291), Santa Monica (90401–90405), and Westchester (90045).
Prop 19 Calculator FAQ
- Who qualifies for a Prop 19 base transfer?
- Homeowners 55 or older, severely disabled homeowners, and victims of a wildfire or natural disaster. Eligible owners may transfer their base up to three times.
- Can the replacement home cost more than the home sold?
- Yes. When the replacement is more expensive, the difference in value is added to the transferred tax base rather than disqualifying the transfer.
- Does Prop 19 apply anywhere in California?
- Yes — the base can transfer to a replacement home anywhere in the state, not just within the same county.
- How did Prop 19 change inherited property?
- The parent-child exclusion is much narrower. Inherited property generally keeps the low base only if the child uses it as a principal residence, subject to a value cap; otherwise it is reassessed.
- Is the calculator an official filing?
- No. It produces an estimate. The actual claim is filed with the Los Angeles County Assessor.
Related tools
County plus city documentary transfer tax, calculated both directions — price to tax, or tax to price.
The closing cost app: seller net sheets, buyer estimates, affordability, rent vs. buy, and multi-offer comparison, on any device.
The color-coded preliminary report that summarizes vesting, exceptions, and requirements in plain English.