Last updated 2026-07-09
TL;DR
California's base property tax rate is 1% of assessed value, set by Proposition 13 in 1978. Local voter-approved bonds and assessments push most homeowners to an effective rate between 1.1% and 1.4%. Assessed value locks at your purchase price and rises no more than 2% a year until the property sells again.
What is the California property tax rate?
California's base property tax rate is exactly 1% of a property's assessed value. That's not a county decision. It's written into the California Constitution by Proposition 13, which voters passed in June 1978 [1].
The 1% base is only the floor. Every county stacks voter-approved bonds on top: school bonds, water district bonds, community college bonds. In most counties your total effective rate lands between 1.1% and 1.4% of assessed value. Some parcels in newer master-planned communities carry multiple Mello-Roos districts and push past 1.8% [2].
The word "effective" carries weight here. Proposition 13 ties assessed value to your purchase price, not to current market value. A homeowner who bought in 1995 at $250,000 still pays 1% on something close to $250,000, even if the house is worth $1.2 million now. Their effective rate against market value is tiny. A buyer who closed last month pays on $1.2 million. Same house. Very different bill.
California runs no single statewide property tax calculator. Each county assessor runs its own tools. The Los Angeles County Assessor, the Santa Clara County Assessor, and most other large counties publish online ca property tax calculator pages where you enter an address or APN and see the assessed value plus a line-item breakdown of your total rate [3].
You can also do the math by hand. Find your county's total rate for your tax rate area (TRA), then multiply by assessed value. That's your annual tax. Divide by 12 to see what your lender is likely escrowing each month.
How does Proposition 13 actually control your assessed value?
Proposition 13 did two things in 1978. It capped the base tax rate at 1%. And it capped annual increases in assessed value at 2% or the rate of inflation, whichever is lower [1]. That second cap is the one that reshaped the whole system.
Most states reassess at or near market value every year or every few years. California reassesses only when a property changes ownership or completes new construction. A sale triggers a full reassessment to the purchase price. Adding a room triggers reassessment only on the added value. The original structure's base value stays locked.
The legal term for your locked starting value is "base year value." The California State Board of Equalization describes it as "the full cash value of the property as of the date of change in ownership or completion of new construction" [4]. From that date forward, the assessor can raise your assessed value by no more than 2% a year, no matter what the market does.
This creates enormous gaps between neighbors. Two identical houses on the same block can carry assessed values 10x apart if one sold recently and the other has been in the same family for 40 years. That's not a bug. Prop 13 voters wanted exactly this.
One wrinkle catches people off guard. If market values fall, the assessor is supposed to reduce your assessed value below your Prop 13 "factored base year value" temporarily, under a provision called Proposition 8 (1978) [5]. This happened widely during the 2008 to 2012 housing crash. When the market recovers, the assessor can raise assessed value back up faster than 2% a year, but only until it hits the factored base year value ceiling again.
What does the typical California property tax bill actually include?
Your annual bill is not one line. It's a stack of charges, each with its own rate, each approved separately by voters.
| Charge type | Who sets it | Typical rate range |
|---|---|---|
| General levy (Prop 13 base) | State Constitution | 1.000% |
| County general fund bonds | County voters | 0.010%, 0.060% |
| School district bonds | District voters | 0.020%, 0.100% |
| Community college bonds | District voters | 0.010%, 0.050% |
| Mello-Roos (CFD) charges | District voters at formation | Varies widely; can be $1,000, $5,000+ flat |
| Special assessments (lighting, etc.) | District voters | Flat dollar amounts |
Source: California State Board of Equalization, Property Tax Overview [4]
Mello-Roos charges are the most variable and the least understood part of the bill. Community Facilities Districts form them to pay for infrastructure in newer developments: roads, schools, fire stations. The charge can be flat or tied to value, and it can run 25 to 40 years. Buying in a subdivision built after roughly 1985? Ask for the CFD disclosure before you close [6].
Your total rate is specific to your "tax rate area" (TRA), a geographic slice that matches the exact combination of overlapping taxing districts for your parcel. Two houses one block apart can sit in different TRAs and carry slightly different total rates if they fall into different school districts. Your county's property tax rate calculator page shows your specific TRA rate when you look up the parcel.
How do California property tax exemptions lower your bill?
California offers several exemptions that cut assessed value directly, shrinking the amount the 1% rate applies to. Some save real money. One saves the price of a decent lunch.
The homeowner's exemption is the common one. It removes $7,000 from assessed value for any owner-occupied primary residence. At a 1% rate, that's $70 a year. Not transformative, but filing it is free and takes about five minutes [4]. File once and it renews automatically as long as you own and occupy the home.
The veterans' exemption goes further. The basic exemption removes $4,000 from assessed value for qualifying veterans. The disabled veterans' exemption removes between $100,000 and $150,000 depending on income (the higher figure applies to households under a threshold the State Board of Equalization sets each year) [4]. If you or your spouse is a totally disabled veteran, this one is worth $1,000 to $1,500 a year at a 1% rate.
The welfare exemption covers property owned and used exclusively by qualifying religious, charitable, scientific, or hospital organizations. Churches, nonprofits, and qualifying affordable housing operators file with both the county assessor and the State Board of Equalization.
Two newer programs help long-time owners who want to move. Proposition 19 (passed November 2020, effective February 2021) lets qualifying homeowners who are over 55, severely disabled, or victims of a natural disaster transfer their base year value to a replacement home anywhere in California [7]. Before Prop 19, transfers stayed inside the same county or a handful of participating counties. Prop 19 made portability statewide but changed the formula: if the replacement home costs more than the original, only part of the base value transfers.
Parent-to-child and grandparent-to-grandchild transfers changed too. The old exclusion was broad. The new rules (effective February 16, 2021) require the inheriting child to use the property as a primary residence, and the exclusion is capped. If the inherited home's market value tops the parent's assessed value by more than $1 million, the excess gets reassessed [7].
Deadlines matter. Most exemption applications are due by February 15 of the tax year for the full exemption, though late filings can sometimes earn a partial benefit.
When are California property taxes due, and what happens if you miss the deadline?
California splits the annual bill into two installments. Miss either deadline and you eat a 10% penalty the next day.
| Installment | Covers | Due date | Delinquent after |
|---|---|---|---|
| First | July 1, Dec 31 | November 1 | December 10 |
| Second | Jan 1, June 30 | February 1 | April 10 |
Source: California State Board of Equalization, Property Tax Calendar [4]
If December 10 or April 10 falls on a weekend or holiday, the deadline moves to the next business day.
Miss a deadline and the penalty is 10% of the unpaid amount, added right away. Still delinquent on June 30 (the end of the fiscal year)? The county can add a $10 charge and mark the bill "tax defaulted." Let a bill sit in default long enough and it can eventually reach a tax lien sale, though California's process runs through several notice and redemption steps first.
The penalties are steep against any benefit from waiting. If you can't pay, most counties run a formal "penalty cancellation" process for documented hardship, military deployment, or a county error in sending the bill. You apply in writing, and approval isn't guaranteed, but do it if you have a real reason.
How do you appeal a California property tax assessment?
If your assessed value is higher than it should be, you appeal to your county's Assessment Appeals Board (AAB). It's a formal administrative process. You do not need a lawyer or a contingency firm to do it.
The grounds are specific. You can argue your base year value was set wrong (this often catches errors on newly purchased properties), that the assessor enrolled a change of ownership that shouldn't have triggered reassessment, or that your property's current market value sits below your current assessed value (a Proposition 8 reduction) [8].
The timeline is strict. For most properties, you must file your appeal petition by November 30 of the assessment year, or within 60 days of the date on a supplemental assessment notice, whichever applies [8]. Miss that window and you're locked out for the year. There's no good-faith exception for a day late.
Here's how the process runs in most counties. You file a petition with the Assessment Appeals Board (the form is county-specific; search your county's name plus "assessment appeals board" to find the official one). You pay a small filing fee, usually $10 to $35 depending on the county. The board schedules a hearing, which in large counties like Los Angeles can land 6 to 18 months after filing. You present evidence of correct value: comparable sales, your own appraisal, listing data. The assessor's office presents counter-evidence. The board decides.
For comparable sales arguments, the assessors and boards want sales that are genuinely similar: same neighborhood, similar size, similar age and condition, closed within 90 days before or after the lien date (January 1). The tighter the comp, the more weight it carries. Three tight comps beat a dozen loose ones.
Want to build your own appeal package without handing a contingency firm 25% to 40% of your first-year savings? The TaxFightBack DIY appeal kit walks through which documents to gather and how to format your evidence for a California AAB hearing.
For a deeper look at Los Angeles County's process, including the APN lookup and local TRA breakdowns, see our LA County property tax guide. Santa Clara County has its own quirks, covered in our Santa Clara property tax guide. In the East Bay, the Contra Costa County property tax guide covers their assessment and appeal procedures. San Mateo County's high assessed values make appeals worth pursuing; see the San Mateo County property tax guide.
What evidence actually wins a California assessment appeal?
The strongest evidence is a tight set of comparable sales, sometimes called "comps," that closed near the January 1 lien date and show a market value below your assessed value. Everything else supports that core.
Here's what makes a comp credible to a California AAB.
Location proximity carries a lot. The assessor will discount a comp from a different neighborhood fast. Ideally your comps sit in the same tract or subdivision, or within a quarter mile.
Sale date proximity counts. California AABs generally prefer sales within 90 days before or after January 1 of the tax year in question. Sales older than 12 months carry much less weight.
Physical similarity counts. Square footage, lot size, bedroom and bath count, age, condition, and garage type all need to be close. A 1,400-square-foot house and a 2,100-square-foot house in the same tract are not a good pair.
Sale type counts. Bank-owned sales, foreclosure auctions, and sales between relatives can all be non-arm's-length, and the board can toss them as unreliable indicators of market value.
If your comps show market value below assessed value, attach them to your petition with MLS data or county recorder data showing the actual sale price and property details. An independent appraisal from a licensed California appraiser is the strongest single piece of evidence, but it costs $500 to $800 and isn't always necessary when your comps are strong.
Photographs of deferred maintenance, functional obsolescence, or damage the assessor missed can back up your sales evidence, especially paired with what similar homes in better condition sold for against yours.
How do supplemental and escape assessments work in California?
Regular tax bills cover the fiscal year (July 1 to June 30) and reflect the assessed value on the January 1 lien date. When ownership changes or new construction finishes mid-year, the assessor issues a separate "supplemental assessment" that charges you for the change in value from the event date through the end of the fiscal year [9].
Buy a home in September and you'll get a supplemental bill a few months after closing, covering the increase in assessed value from September through June 30. You may also still owe the prior owner's tax rate on the original assessed value for the early part of the year, which your title company's escrow calculation should have handled. Confused by a bill? Call the county assessor's office before assuming it's wrong.
An "escape assessment" is a different animal. It's the assessor catching a change of ownership or new construction missed in prior years, reaching back up to four years in most cases. Add a permitted addition the assessor doesn't pick up for three years, and you can get a three-year retroactive escape assessment all at once. These land large and unexpected. You can appeal escape assessments under the same process as regular assessments, but the 60-day clock from the notice date is strict.
How does California property tax compare to other states?
California's 1% constitutional cap gives it one of the lowest statutory rates in the country. The Tax Foundation's 2024 ranking of effective property tax rates (taxes paid as a share of home value) puts California around 0.68% to 0.73% on owner-occupied housing, well under the national median near 1.0% [10].
That low average is almost entirely Prop 13 protecting long-term owners. Recent buyers pay on current market values and face effective rates comparable to, or higher than, many Midwestern states, just denominated against much higher home prices.
| State | Approx. effective rate on market value | Note |
|---|---|---|
| California | 0.68%, 0.73% | Prop 13 base; new buyers closer to 1.0%, 1.4% |
| Texas | 1.6%, 1.8% | No income tax; higher property tax reliance |
| New York | 1.3%, 1.7% | Varies sharply by county; NYC has own system |
| Florida | 0.8%, 1.1% | Homestead exemption moderates bills |
| Illinois | 1.8%, 2.3% | Consistently among highest in U.S. |
Source: Tax Foundation, state property tax comparisons, 2023 to 2024 [10]
For how another major metro handles this, see our NYC property tax guide. Texas's structure, no income tax but high property levies, gets examined in our property tax taxation overview.
What should new California homebuyers know before they close?
Your tax bill will reset to your purchase price on the next January 1 lien date after closing, and the assessor issues a supplemental assessment for the interim period. Budget for both, because the two arrive close together and hit harder than most buyers expect.
Get a copy of the county tax collector's current tax bills for the property before you close. Your title company should provide it, but verify yourself. Look for Mello-Roos and CFD line items specifically. They aren't always clearly labeled, and the seller may not have mentioned them.
The California Civil Code requires sellers to disclose special assessments and Mello-Roos charges on the Natural Hazard Disclosure statement and in the Preliminary Title Report [6]. Read both. The Mello-Roos disclosure lists the annual charge, the years remaining, and which facilities the district is paying for.
If the assessed value from the prior owner's era sits well below your purchase price, your first post-purchase bill may shock you. That's not an error. That's Prop 13 working as designed. Your new base year value is your purchase price, and the assessor enrolls it within a few months of the transfer being recorded.
One practical step: use your county's online property tax rate calculator to get the total TRA rate for your parcel before close. Multiply that rate by your purchase price for a solid estimate of your first full-year bill. Going into escrow? Divide by 12 to check whether your lender's escrow estimate holds up.
Are there special programs that reduce California property taxes for seniors and low-income owners?
California runs two main programs outside standard exemptions, and one of them people count on that no longer exists in any useful form.
The Senior Citizen Property Tax Postponement Program lets qualifying homeowners who are 62 or older, or blind or disabled, postpone payment of current property taxes. The State Controller's Office pays the taxes for you, and the amount builds as a low-interest lien against your property, currently at 7% annual interest. You repay when you sell, refinance, or die. Income limits apply: household income must be $51,762 or less (this figure is set annually, so confirm the current year with the State Controller's Office) [11]. The program was suspended for several years and came back in 2016. Demand has historically outrun funding, so apply early.
The Homeowners' and Renters' Assistance program (sometimes called the "Gonsalves-Deukmejian-Petris" program) was a separate cash rebate. It was suspended in 2009 and, as of 2025, has not returned in any meaningful form. Don't count on it.
Some counties layer local programs on top of the state ones. Los Angeles County has a property tax postponement option for low-income seniors, as do some other counties. Check with your specific county assessor's office.
If you're a veteran with a service-connected disability rated at 100% by the VA, the disabled veterans' exemption under Revenue and Taxation Code Section 205.5 can remove $150,000 of assessed value (roughly $1,500 a year in savings) when your household income qualifies [4].
Frequently asked questions
What is the California property tax rate?
California's base property tax rate is 1% of assessed value, mandated by Proposition 13 (1978). Your actual bill adds local voter-approved bonds and special assessments on top. Most California homeowners pay a total effective rate between 1.1% and 1.4% of assessed value, though parcels with Mello-Roos charges can see total rates above 1.8%.
How is assessed value calculated in California?
Your assessed value starts at your purchase price (the "base year value") and can increase no more than 2% per year until the property sells again. The assessor does not reassess to current market value annually. If market value falls below your base year value, the assessor should reduce your assessment temporarily under Proposition 8 (1978).
When are California property taxes due?
California sends two installments. The first (covering July through December) is due November 1 and becomes delinquent after December 10. The second (January through June) is due February 1 and becomes delinquent after April 10. Late payments carry a 10% penalty. If April 10 or December 10 falls on a weekend, the deadline shifts to the next business day.
How do I use a California property tax calculator?
There's no single statewide calculator. Use your county assessor's online parcel search, enter your address or APN, and find the assessed value and tax rate area (TRA) rate. Multiply the two to estimate your annual bill. LA County, Santa Clara, and most large counties publish their own property tax calculator tools directly on the assessor's website.
Can I appeal my California property tax assessment?
Yes. You file a petition with your county's Assessment Appeals Board. The deadline for most assessments is November 30 of the tax year, or 60 days from a supplemental assessment notice. You'll need evidence that your property's market value or base year value is lower than what the assessor enrolled. Hearings in large counties can take 6 to 18 months after filing.
What is the homeowners' exemption in California and how do I get it?
The homeowners' exemption removes $7,000 from your assessed value, saving about $70 per year at the 1% rate. File once with your county assessor for your primary residence; it renews automatically. Most counties require the initial claim by February 15. The application is free and available on every county assessor's website.
What is Proposition 13 and how does it affect my taxes?
Proposition 13 (passed in 1978) limits California's base property tax rate to 1% and caps annual assessed value increases at 2% or the rate of inflation, whichever is lower. Reassessment to market value only happens when ownership changes or new construction is completed. The result is that long-term owners often pay taxes on assessed values far below current market value.
What is a Mello-Roos tax and do I have to pay it?
Mello-Roos charges are levied by Community Facilities Districts formed to pay for infrastructure in newer developments: schools, roads, fire stations. If your parcel is in a CFD, yes, you owe it. The charge appears as a line item on your tax bill. Sellers must disclose Mello-Roos obligations before closing under California Civil Code. These charges can run 25 to 40 years.
What happens if I miss a California property tax payment?
Missing the December 10 or April 10 deadline triggers an immediate 10% penalty on the unpaid amount. If the bill is still unpaid by June 30, the county adds a $10 charge and marks the property as tax defaulted. Continued default can eventually lead to a tax lien sale, though California has multiple redemption steps before that occurs.
Does California have a property tax exemption for veterans?
Yes. The basic veterans' exemption removes $4,000 from assessed value. Qualifying disabled veterans can remove between $100,000 and $150,000, depending on household income. A 100% service-connected disability rating with qualifying income qualifies for the full $150,000 exclusion under Revenue and Taxation Code Section 205.5. File annually with your county assessor.
Can seniors transfer their property tax base value to a new home?
Yes, under Proposition 19 (effective February 2021). Homeowners who are 55 or older, severely disabled, or victims of a declared natural disaster can transfer their base year value to a replacement home anywhere in California. If the new home costs more than the original, only a partial transfer applies and the difference gets reassessed to market value.
How do supplemental property tax bills work in California?
When you buy a home or complete new construction, the assessor issues a supplemental bill covering the increase in assessed value from the event date through the end of the fiscal year (June 30). Expect this bill 3 to 6 months after your closing date. It covers only the partial year and is separate from your regular annual tax bill.
What is the difference between assessed value and market value in California?
Market value is what a buyer would pay today. Assessed value in California is your purchase price (base year value) adjusted upward by no more than 2% per year. For long-term owners these can diverge dramatically: a home bought for $200,000 in 1990 may have an assessed value around $350,000 even if the market value is $1.5 million.
How do I find my California property's tax rate area and total rate?
Look up your parcel on your county assessor's or tax collector's website using your address or APN (Assessor's Parcel Number). The result will show your tax rate area (TRA) and the total combined rate for your specific parcel, including all bonds and special charges layered on top of the 1% base. The TRA code is also printed on your annual tax bill.
Sources
- California Constitution, Article XIII A (Proposition 13, 1978): Base property tax rate capped at 1% of assessed value; annual increases capped at 2% or inflation, whichever is lower; reassessment triggered by change of ownership or new construction
- California State Board of Equalization, Understanding Proposition 13: Local voter-approved bonds and special assessments added on top of 1% base rate push total effective rates above 1% in most counties
- Los Angeles County Assessor, Property Search and Tax Estimator: County assessor online tools allow parcel lookup showing assessed value and TRA rate breakdown
- California State Board of Equalization, Property Tax Overview and Assessors' Handbook: Base year value definition; homeowner's exemption of $7,000; veterans' and disabled veterans' exemptions; welfare exemption; property tax calendar and installment due dates; disabled veterans' exemption under Revenue and Taxation Code Section 205.5
- California State Board of Equalization, Proposition 8 Temporary Reduction in Assessed Value: Proposition 8 (1978) requires temporary reduction in assessed value when market value falls below Prop 13 factored base year value; assessor can restore value as market recovers up to the factored ceiling
- California Civil Code, Mello-Roos Community Facilities Act disclosure requirements: Sellers required to disclose Mello-Roos and special assessment obligations before closing; CFD charges can run 25-40 years
- California State Board of Equalization, Proposition 19 Fact Sheet: Proposition 19 (effective February 2021) allows base year value transfer statewide for homeowners 55+, severely disabled, or disaster victims; parent-to-child transfer rules effective Feb 16, 2021 require primary residence use and cap the exclusion, reassessing value above $1 million over the parent's assessed value
- California State Board of Equalization, Assessment Appeals Process (Publication 30): Assessment appeal deadline is November 30 of the assessment year or 60 days from supplemental notice; filed with county Assessment Appeals Board; hearing timing varies by county
- California State Board of Equalization, Supplemental Assessments guidance: Supplemental assessments charge for change in value from event date (change of ownership or completed new construction) through end of fiscal year; escape assessments recover missed changes going back up to four years
- Tax Foundation, State Property Tax Rates and Comparisons, 2023-2024: California effective property tax rate approximately 0.68%-0.73% on market value of owner-occupied housing, below national median of roughly 1.0%; Texas 1.6%-1.8%, Illinois 1.8%-2.3%
- California State Controller's Office, Property Tax Postponement Program: Senior Property Tax Postponement Program: qualifying homeowners 62+ with household income at or below $51,762 (annually adjusted) may defer taxes at 7% annual interest as a lien; reinstated 2016