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Updated 2025 Tax Year

Santa Clara County
Property Tax Guide

Everything you need to know about property taxes in Santa Clara County, CA. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
Quick Facts
Tax Rate
1.0% - 1.25%
1st Due
Nov 1
2nd Due
Feb 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Santa Clara County's property tax system operates under California's Proposition 13 framework, which limits the base tax rate to 1% of assessed value plus voter-approved debt service. Property taxes in Santa Clara County fund essential local services including public schools, fire protection, police services, libraries, parks, and county operations. The county assessor determines property values as of January 1st each year (the lien date), and these assessed values form the basis for annual tax calculations.

Property owners in Santa Clara County typically pay between 1.0% and 1.25% of their property's assessed value annually, depending on their specific tax rate area and any local bonds or special assessments. The county uses a two-installment payment system, with the first installment due November 1st (delinquent after December 10th) and the second installment due February 1st (delinquent after April 10th). Homeowners who qualify can reduce their taxable assessed value by $7,000 through the Homeowner's Exemption, which provides annual savings of approximately $70-80 depending on the specific tax rate.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
General Tax Levy1.00%Base rate mandated by Proposition 13
School Bonds0.10-0.15%Voter-approved bonds for school districts
City Bonds0.02-0.08%Municipal improvement bonds
Special Districts0.03-0.07%Fire districts, libraries, parks, water districts
Total Effective Rate1.0-1.25%Varies by Tax Rate Area (TRA)

The exact rate depends on your property's Tax Rate Area (TRA), which determines which local districts and bond measures apply to your property. Santa Clara County has over 900 different TRAs, each with its own combination of local agencies and voter-approved debt service. Your annual property tax bill will show the specific breakdown for your TRA.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Santa Clara County, property taxes are due in two installments:

First Installment
Nov 1
Delinquent after Dec 10
Second Installment
Feb 1
Delinquent after Apr 10
Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental property taxes are triggered by two main events: change in ownership or completion of new construction. When either occurs, the county assessor determines a new assessed value and calculates additional tax owed for the remainder of the fiscal year (July 1 - June 30). The supplemental tax covers the difference between the old assessed value and the new assessed value, prorated for the remaining months in the fiscal year.

The calculation formula is: (New Assessed Value - Old Assessed Value) × Tax Rate × (Months Remaining ÷ 12). For example, if you purchase a home in January that was previously assessed at $400,000 but sells for $700,000, and your tax rate is 1.15%, the supplemental tax would be: ($700,000 - $400,000) × 1.15% × (5 months remaining ÷ 12) = $1,437.50.

Supplemental tax bills are typically mailed within nine months after the triggering event, and you'll receive a Notification of Supplemental Assessment approximately 60 days before the bill arrives. These taxes become delinquent and subject to penalties if not paid within the timeframe specified on the bill, so it's important to monitor for these bills after any property transaction or construction completion.

Example Calculation

$300,000 Home (with Homeowner's Exemption):

  • Assessed Value: $300,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $293,000
  • Tax Rate (example TRA): 1.12%
  • Annual Tax: $293,000 × 1.12% = $3,281.60
  • First Installment: $1,640.80 (due Nov 1, delinquent Dec 10)
  • Second Installment: $1,640.80 (due Feb 1, delinquent Apr 10)
  • Monthly (if escrowed): $273.47

$600,000 Home (with Homeowner's Exemption):

  • Assessed Value: $600,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $593,000
  • Tax Rate (example TRA): 1.18%
  • Annual Tax: $593,000 × 1.18% = $6,997.40
  • First Installment: $3,498.70 (due Nov 1, delinquent Dec 10)
  • Second Installment: $3,498.70 (due Feb 1, delinquent Apr 10)
  • Monthly (if escrowed): $582.78

$1,000,000 Home (with Homeowner's Exemption):

  • Assessed Value: $1,000,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $993,000
  • Tax Rate (example TRA): 1.21%
  • Annual Tax: $993,000 × 1.21% = $12,015.30
  • First Installment: $6,007.65 (due Nov 1, delinquent Dec 10)
  • Second Installment: $6,007.65 (due Feb 1, delinquent Apr 10)
  • Monthly (if escrowed): $1,001.28

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Section 5

Escrow & Property Taxes

Most homeowners with mortgages have their property taxes paid through an escrow account managed by their mortgage servicer. The lender collects monthly escrow payments along with your mortgage payment, then pays the county directly before the delinquent dates (December 10th and April 10th). Your lender is responsible for ensuring timely payment to avoid penalties, but you should verify that payments are being made correctly by checking your annual escrow analysis statement and monitoring the county's online payment system at payments.sccgov.org/propertytax.

If your property taxes increase due to reassessment, supplemental taxes, or new voter-approved bonds, your monthly escrow payment will be adjusted during the annual escrow analysis. Lenders typically spread any escrow shortage over 12 months and may require an immediate payment if the shortage is substantial. You'll receive written notice of any escrow changes at least 60 days before the new payment amount takes effect.

Homeowners without escrow accounts must pay property taxes directly to Santa Clara County. You can pay online at payments.sccgov.org/propertytax using electronic check (no fee) or credit/debit card (2.22% convenience fee, minimum $1.49). You can also mail payments to SCC DTAC or pay in person at the Department of Tax and Collections office. Remember that taxes become delinquent at 5:00 PM on December 10th and April 10th, so allow adequate time for payment processing.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

When exactly are my property taxes due? The first installment is due November 1st and becomes delinquent after 5:00 PM on December 10th. The second installment is due February 1st and becomes delinquent after 5:00 PM on April 10th. If December 10th or April 10th falls on a weekend or county holiday, the delinquent date extends to the next business day. You must pay the first installment before you can pay the second installment.

How do I qualify for the Homeowner's Exemption? You must own and occupy the property as your principal residence as of January 1st (the lien date). File Form BOE-266 with the Santa Clara County Assessor's Office. This is typically a one-time filing that remains in effect as long as you continue to own and occupy the property. The exemption reduces your assessed value by $7,000, saving approximately $70-80 annually depending on your tax rate.

How is my property assessed and valued? The county assessor determines your property's value as of January 1st each year. Under Proposition 13, your assessed value can only increase by a maximum of 2% annually unless there's a change in ownership or new construction. The assessor uses recent comparable sales, replacement cost, and income approaches (for income properties) to determine market value at the time of purchase or construction.

How do I appeal my property assessment? File an Assessment Appeal Application with the Santa Clara County Assessment Appeals Board between July 2nd and September 15th (or within 60 days of receiving a notice of assessed value). There is no fee to file an appeal. The Appeals Board will schedule a hearing where you can present evidence that your property is overvalued. You can represent yourself or hire professional representation.

What happens if I pay my property taxes late? A 10% penalty is added to any installment paid after the delinquent date. If taxes remain unpaid for five years, the property can be sold at a tax sale. Additional redemption penalties and costs accumulate over time, making it expensive to bring delinquent taxes current. Interest also accrues on unpaid taxes.

How do I pay my property taxes online? Visit payments.sccgov.org/propertytax to view and pay your bill. You can pay by electronic check (eCheck) with no fee, or by credit/debit card with a 2.22% convenience fee (minimum $1.49). The site accepts Visa, Mastercard, American Express, and Discover. The payment portal is unavailable during scheduled maintenance on the third weekend of each month from 8:00 AM Saturday to 5:00 PM Sunday.

What other property tax exemptions are available? Veterans with service-connected disabilities may qualify for a Disabled Veterans' Exemption of $100,000-$150,000 (income limits apply). Seniors age 65+, blind, or disabled persons may qualify for property tax postponement if they meet income and equity requirements. Some properties may qualify for historical property exemptions or other specialized programs.

How does supplemental property tax work when I buy a home? When you purchase property, the county reassesses it based on your purchase price. If this creates a higher assessed value, you'll receive a supplemental tax bill for the difference, prorated from the first day of the month following your purchase through June 30th. This bill typically arrives 3-9 months after closing and is in addition to your regular annual property taxes.

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