California property tax is based on the assessed value of your home, not its market value

California's property tax system is built on Proposition 13, a law passed in 1978 that fundamentally changed how the state taxes real estate. Under this system, your property tax bill is calculated from the assessed value of your home — which is usually much lower than what your home is actually worth on the market. The state assesses your property at purchase, then increases that assessed value by a maximum of 2 percent per year, regardless of how much your home's market value rises.

The actual tax rate you pay is set by your county and local taxing agencies, not by the state. This means the total property tax you owe varies depending on where in California your property sits. A home worth $500,000 in one county may have a different tax bill than an identical home in another county because each county, school district, and local agency sets its own tax rate.

Property tax in California funds schools, county services, fire departments, and other local government operations. When you buy a home, you will receive a property tax bill from your county assessor's office, usually twice per year. If you have a mortgage, your lender typically collects property tax as part of your monthly payment and holds it in an escrow account.

Key Takeaways

  • Your property tax is based on the assessed value set at purchase, which increases by no more than 2 percent annually under Proposition 13, even if your home's market value rises much faster.
  • The tax rate varies by county and local jurisdiction, so you need to know your specific county's rate to estimate your bill.
  • Property tax bills are typically sent twice per year by your county assessor's office, and most mortgage lenders collect the tax through monthly escrow payments.
  • Your assessed value resets to current market value only when you sell the property or make major improvements, which is when your tax bill may increase significantly.

How the assessed value is determined and when it changes

When you purchase a property in California, the county assessor assigns an assessed value based on the purchase price. This becomes your base assessed value. From that point forward, the assessed value can increase by no more than 2 percent per year, even if your home's market value doubles or triples. This protection is one of the main reasons Proposition 13 was popular with homeowners.

The assessed value resets to current market value in two situations: when you sell the property, or when you make major improvements to the home. Major improvements include additions, renovations, or structural changes — not routine maintenance like painting or replacing a roof. If you add a second story, finish a basement, or build a garage, the assessor will reassess that portion of your property and may increase your overall assessed value beyond the 2 percent annual cap.

If you believe your assessed value is incorrect, you can file an appeal with your county assessor's office. The process and deadlines vary by county, but most assessors allow appeals within 30 days of receiving your property tax bill. You will need to provide evidence that the assessed value does not match the property's actual condition or market value.

What the tax rate is and how it's calculated

California's statewide property tax rate is 1 percent of the assessed value. However, this is only the base rate. On top of that 1 percent, your county, school district, city, and other local agencies can add their own tax rates, called voter-approved bonds or assessments. These additional rates are approved by local voters and fund specific services or infrastructure projects.

The total tax rate you pay is the sum of all these layers. In some areas, the total rate may be 1.2 percent of assessed value; in others, it could be 1.5 percent or higher. To find your specific tax rate, contact your county assessor's office or check your property tax bill, which will break down each component of the rate.

Your actual property tax bill is calculated by multiplying your assessed value by your total tax rate. For example, if your assessed value is $400,000 and your total tax rate is 1.25 percent, your annual property tax would be $5,000 (paid in two installments). The county assessor's office sends this bill to you directly, or your mortgage lender pays it on your behalf from your escrow account.

When property tax bills are due and how to pay them

California property tax bills are issued twice per year. The first installment is typically due November 1 and becomes delinquent if unpaid by December 10. The second installment is typically due February 1 and becomes delinquent if unpaid by April 10. These dates are the same statewide, though your county assessor's office may send bills on slightly different dates depending on processing schedules.

If you own your home outright without a mortgage, you will receive bills directly from your county assessor and are responsible for paying them on time. If you have a mortgage, your lender collects property tax through your monthly escrow payment and pays the county on your behalf. You can verify that your lender is paying your taxes by reviewing your mortgage statement, which should show the escrow account activity.

You can pay property tax bills by mail, in person at your county assessor's office, or online through your county's website. Some counties accept payment by credit card or electronic transfer, though fees may apply. If you miss a payment deadline, the county will charge a penalty and may eventually place a lien on your property or begin foreclosure proceedings.

Exemptions and reductions that may lower your bill

California offers several property tax exemptions and reductions for specific situations. The homeowner's exemption reduces the assessed value of your primary residence by $7,000, which lowers your tax bill by approximately $70 per year (at the 1 percent base rate). You must file for this exemption with your county assessor; it does not happen automatically.

Other exemptions include the disabled veteran's exemption, which can reduce assessed value by up to $168,000 depending on the veteran's disability rating, and the senior citizen's property tax deferral program, which allows homeowners age 62 or older to defer property taxes if their household income is below a certain threshold. may be able to access for these programs varies, and you must apply directly to your county assessor's office.

Some properties also may have access to for exemptions based on their use — churches, nonprofits, and government-owned properties may be exempt from property tax entirely. If your property falls into one of these categories, contact your county assessor to determine whether you need to file for the exemption or whether it is granted automatically.

How Proposition 13 affects your property tax over time

Proposition 13's 2 percent annual increase cap means that your property tax bill grows very slowly compared to your home's actual market value. If you bought a home for $300,000 in 2000, your assessed value would have grown to roughly $445,000 by 2024 (at 2 percent per year). But if that home is now worth $1.2 million on the market, your tax bill is based on the much lower assessed value, not the current market price.

This protection benefits long-term homeowners but creates a disparity: two neighbors with identical homes may pay vastly different property taxes if one bought decades ago and the other bought recently. The person who bought recently pays tax based on the current purchase price, while the long-term owner pays tax based on a much lower assessed value. This is a known feature of California's tax system, not a mistake.

When you sell your home, the assessed value resets to the sale price, and the new owner's tax bill will be based on that higher amount. This is why property tax can increase significantly after a sale — the new owner's assessed value starts fresh at the purchase price rather than continuing the previous owner's lower assessed value.

Frequently Asked Questions

What happens to my property tax if I don't sell my home for 20 years?

Your assessed value will increase by no more than 2 percent per year, so after 20 years it will have roughly doubled from your original purchase price. Your property tax bill grows at the same slow rate. When you eventually sell, the new owner's assessed value resets to the sale price, which may be much higher than what you were paying tax on.

Can I deduct California property tax on my federal income tax return?

Yes, but with limits. Federal tax law allows you to deduct up to $10,000 per year in state and local taxes combined (property tax, income tax, and sales tax). If your property tax alone exceeds $10,000, you can only deduct $10,000 total. Consult a tax professional to understand how this cap affects your specific situation.

What if I disagree with my assessed value?

You can file a Proposition 8 appeal with your county assessor within 30 days of receiving your property tax bill. You will need to provide evidence that the assessed value is incorrect — comparable sales, a recent appraisal, or documentation of property damage. The assessor will review your appeal and may reduce the assessed value if your evidence supports it.

Do I have to pay property tax if I rent out my home?

Yes. Property tax is owed by the property owner, not the tenant. If you own a rental property in California, you are responsible for paying property tax on it. You may be able to deduct property tax as a business expense on your federal income tax return if you report rental income.

What is the difference between property tax and homeowner's insurance?

Property tax is a government tax that funds schools and local services. Homeowner's insurance is a private insurance policy that protects your home against damage and liability. Both are often collected together in your mortgage escrow account, but they are separate payments to different entities.