Over-55 Property Tax Transfer in California: Prop 19 Rules
Updated July 2026. Rules and figures current as of this date.
Sell your long-held home, keep your low property tax bill, and take it to any county in California. Here is exactly how the Prop 19 base year value transfer works, with the dollar math.
The Over-55 Home Sale Exemption in California: What It Actually Is
There is no "over-55 home sale exemption" in California, and the phrase causes real confusion for sellers in Pasadena and across LA County every tax season. What people are usually looking for is one of three separate benefits, and only one of them is age-based. The age-based one is Proposition 19's base year value transfer: it does not exempt your sale from any tax, it lets you carry your current home's low property tax assessment to your next home anywhere in California (Board of Equalization, boe.ca.gov/prop19).
Here is the three-way distinction I walk clients through before they list a long-held home in Arcadia or South Pasadena:
| Benefit | What it covers | Age rule |
|---|---|---|
| Prop 19 base year value transfer | Moves your low property tax assessment to a replacement home in any CA county (BOE) | 55+ (or disabled/disaster victim at any age) |
| Federal home sale exclusion (IRC Section 121) | Excludes up to $250,000 single / $500,000 married of capital gain if you owned and lived in the home 2 of the last 5 years (IRS Topic 701) | Any age |
| The old one-time $125,000 over-55 exclusion | A once-per-lifetime capital gains break for sellers 55+ | Repealed in 1997 (Taxpayer Relief Act). It no longer exists. |
The repealed $125,000 rule is the ghost that haunts this topic. Sellers in their 60s and 70s remember it from their parents' generation and assume an age-triggered capital gains break still exists. It does not. What you get today at any age is the $250,000/$500,000 federal exclusion, and what you get at 55 is the Prop 19 property tax transfer. They stack: a Temple City couple selling a $1.2M home can often use both in the same transaction.
This article covers the Prop 19 side: who qualifies, the exact transfer math, and how to file. If you are weighing whether to downsize at all, my guide on downsizing in LA County for homeowners 55 and older covers the where-to-move decision. The property tax transfer is the piece that changes the math most: done right, it can keep a tax bill locked near what you paid decades ago, instead of resetting on a purchase at today's LA County median of $838,350 (CAR, May 2026).
How Does Prop 19 Work for Seniors?
Proposition 13 caps how fast your assessed value can grow: 2 percent a year, no matter what the market does. A homeowner who bought in Alhambra decades ago can easily be carrying an assessed value under $400,000 on a home that would sell near $1M today. Selling normally means the next home gets assessed at its full purchase price, and the property tax bill can triple or quadruple overnight. Prop 19's base year value transfer, operative since April 1, 2021, is the escape hatch: it lets qualifying homeowners take the old assessed value with them (BOE).
Three groups qualify for the transfer. Age is only one of them:
Age 55 or Older
You or your spouse must be at least 55 when the original home sells. Per BOE guidance, one qualifying spouse is enough, and the spouse counts as a claimant if they are a record owner of the replacement home. This is the pathway most LA County downsizers use.
Severely Disabled
Severely and permanently disabled homeowners qualify at any age, on the same terms as the over-55 pathway: statewide portability and the same value math. The claim uses form BOE-19-D plus a physician's certificate, BOE-19-DC.
Disaster Victims
Homeowners whose primary residence was substantially damaged or destroyed in a Governor-declared disaster, including the January 2025 LA County wildfires, can transfer their base year value to a replacement home anywhere in California using form BOE-19-V.
The Core Requirements
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The home you sell must be your primary residence. BOE requires it to be eligible for the homeowners' or disabled veterans' exemption at the time of sale, or within two years of the replacement purchase. Rentals and second homes do not qualify.
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The replacement must also become your primary residence. A condo in Pasadena, a single-story in Glendale, or a home near the grandkids in San Diego County all work. An investment property does not.
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Both transactions must fall within a 2-year window. You can sell first and then buy, or buy first and then sell, as long as the two events are within two years of each other (BOE).
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The replacement can be anywhere in California. All 58 counties. Before Prop 19, cross-county moves only worked into roughly 10 counties that opted in under Prop 90.
For a plain-language overview of every group Prop 19 touches, including the inheritance provisions this article does not cover, see who qualifies for Proposition 19. The headline numbers for the senior pathway are simple: at least one spouse aged 55 at sale, a 2-year window, and up to 3 uses per person over a lifetime (BOE).
How to Transfer Your Property Tax Base in California, Step by Step
The transfer is not automatic. It is a claim you file after both transactions close, and the order of operations matters because the value comparison changes depending on when you buy. Here is the sequence I map out with sellers in the San Gabriel Valley:
You or your spouse must be 55 or older on the date the original home sells, not the date you file. The home must be your primary residence, eligible for the homeowners' exemption. Check your latest property tax bill for the $7,000 homeowners' exemption line.
Either order works. Buying first is often the stronger play in a slow market: the value comparison uses 100 percent of the original home's sale price instead of 105 or 110 percent. My article on buying before you sell under Prop 19 walks through that strategy.
The 2-year clock runs between the sale of the original home and the purchase or completion of new construction on the replacement. Miss the window and there is no transfer, no exceptions in the statute.
File with the assessor of the county where the replacement home is located, within 3 years of the replacement purchase. In LA County that is the LA County Assessor (assessor.lacounty.gov, (213) 974-3211). File late and relief only runs forward from the year you file (BOE).
Occupy the replacement as your principal residence and file for the homeowners' exemption there. Expect the county to issue regular bills at the purchase-price assessment until the claim processes, with a corrected value once it is approved.
The filing itself is one form and supporting documents. If you want the paperwork walkthrough with screenshots of each section, see the companion guide on how to file Proposition 19. The two numbers to tattoo on the timeline: 2 years to complete both transactions, 3 years to file the claim for full relief.
The Value-Difference Math: Buying a More Expensive Replacement
The old Prop 60/90 rules had a hard wall: the replacement had to cost the same or less than the home you sold. Prop 19 removed the wall. You can buy a more expensive replacement and still transfer your base; the price tag alone no longer disqualifies you. The difference above an adjusted threshold simply gets added to your transferred value (BOE).
The threshold depends on timing. The replacement's market value is compared against your original home's market value multiplied by an adjustment factor:
| When you buy the replacement | Adjustment factor | On a $1,200,000 sale, full transfer up to |
|---|---|---|
| Before the original home sells | 100% | $1,200,000 |
| Within the first year after the sale | 105% | $1,260,000 |
| Within the second year after the sale | 110% | $1,320,000 |
Below the threshold, your entire base year value transfers untouched. Above it, only the excess is added. California property taxes run roughly 1.1 to 1.25 percent of assessed value once local assessments are included; I use 1.2 percent in the examples below as a working LA County figure.
Example A: Downsizing to a Less Expensive Home, Full Transfer
Original home sells for: $1,200,000 (factored base year value: $300,000) | Replacement: $900,000 Pasadena condo | Comparison: $900,000 is under every threshold, so the full base transfers. | New assessed value: $300,000 | Annual tax: ~$3,600 instead of ~$10,800 without the transfer. Savings: ~$7,200 per year.
Example B: Buying Up Within the First Year, Partial Add-On
Original home sells for: $1,200,000 (factored base: $300,000) | Replacement: $1,500,000, bought 8 months after the sale | Threshold: $1,200,000 × 105% = $1,260,000 | Excess: $1,500,000 − $1,260,000 = $240,000 | New assessed value: $300,000 + $240,000 = $540,000 | Annual tax: ~$6,480 vs. ~$18,000 with no transfer. Savings: ~$11,520 per year.
Example C: Same Purchase in the Second Year
Same $1,500,000 purchase made in month 18 instead of month 8: the threshold rises to $1,200,000 × 110% = $1,320,000, the excess drops to $180,000, and the new assessed value lands at $480,000, about $5,760 per year in tax. Waiting into the second year saved this buyer roughly $720 per year, permanently. Timing is a lever, not a footnote.
The State Board of Equalization's own worked example follows the identical pattern at smaller numbers: a $400,000 home with a $100,000 base, replaced by a $600,000 purchase in the first year, compares against $420,000, adds the $180,000 excess, and lands at a $280,000 new taxable value (BOE, boe.ca.gov/prop19). Whatever your price band, the structure is the same: base + excess over the adjusted threshold, and the excess only exists if you spend past 100 to 110 percent of what you sold for.
What's My Home Worth in 2026?
The Prop 19 math starts with what your current home would actually sell for. Get a free valuation from Justin Borges, backed by real comps, not a Zestimate.
Get My Free Home ValuationProp 19 vs. the Old Prop 60/90 Rules
If you researched this move before 2021, or used a transfer years ago, most of what you remember has changed. Propositions 60 and 90 governed over-55 transfers from 1986 until Prop 19's base transfer provisions took over on April 1, 2021, and every major restriction loosened (BOE):
| Rule | Old Prop 60/90 | Prop 19 (April 1, 2021 onward) |
|---|---|---|
| Where you can move | Same county, or ~10 opt-in counties | Anywhere in California, all 58 counties |
| Lifetime uses | Once | 3 times per person (55+/disabled) |
| More expensive replacement | Disqualified entirely | Allowed; excess over 100-110% threshold is added to base |
| Window between transactions | 2 years | 2 years (unchanged) |
| Prior Prop 60/90 use counts against you? | n/a | No. The 3 Prop 19 uses reset regardless of a prior transfer (BOE) |
Under the old rules, a Glendale homeowner could not carry their tax base to Ventura or San Diego County unless that county had opted in. Now the entire state is open, which changes the retirement calculus for the SGV homeowners I work with: Sacramento suburbs, the Central Coast, and lower-cost inland markets are all on the table with the LA tax base in hand. And if you already used a Prop 60 transfer in the 1990s or 2000s, you still get 3 fresh uses under Prop 19.
One thing Prop 19 took away sits on the inheritance side of the measure, not the senior side: children who inherit now face reassessment unless they occupy the home, a major tightening versus the old Prop 58 rules. That lane has its own rules, forms, and deadlines, covered in the guide linked in the next section. For sellers 55 and older, the scorecard is one-directional: statewide portability, 3 uses, and no price ceiling since April 1, 2021.
Form BOE-19-B: Filing Deadlines and County Processing
The claim form for the over-55 transfer is BOE-19-B, "Claim for Transfer of Base Year Value to Replacement Primary Residence for Persons at Least Age 55 Years" (BOE forms list, boe.ca.gov/prop19). Two other versions of the claim exist for the other pathways. Getting the form number right matters: county assessors process parent-child inheritance claims on an entirely different form, and mixing them up stalls the claim.
File BOE-19-B within 3 years of buying the replacement and the transfer applies back to the date of transfer, wiping out the interim difference. File after 3 years and BOE guidance is blunt: you get prospective relief only, starting with the lien date of the year you file. The low base still transfers going forward, but every year you waited was taxed at full purchase-price assessment, and that money is gone.
In LA County, claims go to the LA County Assessor. Current forms and county instructions are on the assessor's Prop 19 page at assessor.lacounty.gov, and the office answers Prop 19 questions at (213) 974-3211. Expect regular tax bills at the unadjusted assessment while the claim processes; the correction and any refund come after approval. Plan around the two deadlines that control everything: 2 years to complete both transactions, 3 years to file for full relief.
What Changed for Prop 19 in 2026?
For the over-55 base year value transfer: nothing. The rules described in this article, statewide portability, the 3-transfer limit, the 2-year window, the 100/105/110 percent value factors, and the BOE-19-B claim process, are unchanged in 2026 and operate exactly as they have since April 1, 2021 (BOE). If you read a 2021 or 2022 explainer, the senior-side mechanics still hold.
The political noise around Prop 19 is real but aimed at the other half of the measure. The "Repeal the Death Tax" initiative, which would have restored the old parent-child inheritance rules, failed to qualify for the November 2026 ballot, collecting roughly 560,000 of the 874,641 signatures required; its sponsors have said they are targeting 2028. A pending constitutional amendment in the Legislature, SCA 4, also addresses the inheritance side and is not law. Neither effort touches the over-55 transfer.
Prop 19's other provision governs what happens when children inherit a family home, with a 1-year occupancy requirement, a value cap, and its own claim form. That is a different lane with different deadlines. The full breakdown is in my guide to Prop 19 inheritance and family home rules, updated for 2026.
One 2026-specific reality does affect this lane in practice: disaster-victim transfers. LA County homeowners whose primary residence was substantially damaged in the January 2025 wildfires can use the disaster pathway at any age, and the 2-year clock runs between the sale of the damaged property and the replacement purchase, so many of those windows are still open now. For a homeowner who is also 55 or older, both pathways lead to the same value math; which claim to file is worth a call to the assessor, because the paperwork differs: the age-based claim is form BOE-19-B, and the disaster claim is form BOE-19-V.
Frequently Asked Questions
How does Prop 19 work for seniors?
If you are 55 or older when you sell your primary residence, Prop 19 lets you transfer that home's low assessed value to a replacement home anywhere in California, purchased within 2 years of the sale. If the replacement costs more, only the difference above an adjusted threshold is added to your tax base. You can use it up to 3 times.
What is the over-55 home sale exemption in California?
There is no over-55 exemption from tax when you sell. What exists is the Prop 19 base year value transfer, which moves your low property tax assessment to your next home. The federal capital gains exclusion of $250,000 single or $500,000 married applies at any age. The old one-time $125,000 over-55 exclusion was repealed in 1997.
How do I transfer my property tax base in California?
Sell your primary residence at or after age 55, buy or build a replacement anywhere in California within 2 years, occupy it as your primary residence, and file form BOE-19-B with the assessor of the county where the replacement home is located. File within 3 years of the purchase to get relief back to the transfer date.
How many times can you use Prop 19?
Homeowners who are 55 or older or severely disabled can transfer their base year value up to 3 times under Prop 19, per the State Board of Equalization. That is a per-person limit, and it applies regardless of whether you used a transfer under the old Prop 60/90 rules before April 1, 2021.
Is Prop 19 only in California?
Yes. Proposition 19 amended the California Constitution and applies only to California property taxes; other states have their own, separate senior property tax relief programs.
Do both spouses need to be 55 to qualify for Prop 19?
No. Per BOE guidance, either the claimant or the claimant's spouse must be at least 55 when the original home is sold, and the spouse counts as a claimant if they are a record owner of the replacement home. One qualifying spouse is enough for the household.
Can I buy my replacement home before selling my current one?
Yes. BOE guidance confirms the base year value transfers as long as the original home sells within 2 years of the replacement purchase. Buying first has a math advantage: the replacement only needs to be at or below 100 percent of the original home's sale price for a full transfer, versus 105 or 110 percent after.
What form do I file for the over-55 property tax transfer?
File form BOE-19-B, the Claim for Transfer of Base Year Value to Replacement Primary Residence for Persons at Least Age 55 Years. Severely disabled homeowners file BOE-19-D with certificate BOE-19-DC, and disaster victims file BOE-19-V. All are filed with the county assessor where the replacement home sits.
Over-55 Transfer Quick Reference
| Question | Answer |
| Who qualifies? | 55+ at time of sale (either spouse), severely disabled, or Governor-declared disaster victims |
| What transfers? | Your factored base year value (the low Prop 13 assessment) to the replacement home |
| Where can the replacement be? | Anywhere in California, all 58 counties |
| Time window | Both transactions within 2 years, either order |
| More expensive replacement? | Allowed. Excess over 100% / 105% / 110% of the original's value is added to your base |
| How many times? | 3 per person for the 55+/disabled pathways, even if you used Prop 60/90 before |
| Which form? | BOE-19-B (55+), BOE-19-D + DC (disabled), BOE-19-V (disaster) |
| Filing deadline | Within 3 years of the replacement purchase for full relief; later filings run forward only |
| Where to file (LA County) | LA County Assessor, assessor.lacounty.gov, (213) 974-3211 |
Ready to Run Your Prop 19 Numbers?
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