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Updated 2025 Tax Year

Stanislaus County
Property Tax Guide

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

8 Official Sources
8 min read
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Quick Facts
Tax Rate
1.15% average effective rate (1% base + voter-approved additions)
1st Due
Nov 1
2nd Due
Feb 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Stanislaus County's property tax system operates under California's Proposition 13 framework, with an average effective tax rate of 1.15% as of 2023. Property taxes are the primary funding source for essential local services including public schools, county operations, fire protection, libraries, and special districts throughout Stanislaus County. The county's 2025-2026 assessment roll totals $72.82 billion, representing a 4.56% increase from the prior year.

Property owners in Stanislaus County benefit from Proposition 13's protections, which limit the base tax rate to approximately 1% of assessed value and cap annual assessment increases at 2%. Additional voter-approved bonds and special assessments may increase the total rate above the base 1%, resulting in the county's current average rate of 1.15%. All properties are reassessed to current market value upon change of ownership or completion of new construction, while existing owners enjoy predictable, modest annual increases.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
Base County Rate~1.00%Core county services, schools, and basic municipal functions
School Bonds~0.10%Voter-approved school district bonds for construction and improvements
City/Local Bonds~0.03%Municipal bonds for infrastructure and public improvements
Special Districts~0.02%Fire protection, water, library, and other special service districts
Total Average Rate1.15%Combined rate applied to assessed value

Note: Actual rates vary by specific location within Stanislaus County based on which tax rate areas and special districts serve each property.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Stanislaus 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 taxes are additional property tax bills issued when property undergoes a change in ownership or new construction is completed. These taxes cover the difference between the old assessed value and the new assessed value for the remaining portion of the fiscal year (July 1 - June 30). Supplemental taxes are calculated by taking the difference in assessed values, multiplying by the applicable tax rate, and prorating for the remaining months in the fiscal year.

For example, if you purchase a home in January that was previously assessed at $400,000 but sells for $600,000, you would receive a supplemental tax bill for the $200,000 difference in assessed value. At a 1.15% tax rate, this would equal $2,300 annually, prorated for the remaining 5 months of the fiscal year (January-June), resulting in a supplemental bill of approximately $958.

Example Calculation

$300,000 Home:

  • Assessed Value: $300,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $293,000
  • Tax Rate: 1.15%
  • Annual Tax: $3,370
  • Monthly Escrow: $281

$600,000 Home:

  • Assessed Value: $600,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $593,000
  • Tax Rate: 1.15%
  • Annual Tax: $6,820
  • Monthly Escrow: $568

$1,000,000 Home:

  • Assessed Value: $1,000,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $993,000
  • Tax Rate: 1.15%
  • Annual Tax: $11,420
  • Monthly Escrow: $952

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Stanislaus County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects monthly payments equal to 1/12 of your estimated annual property tax bill, holds these funds in escrow, and pays your tax bills directly to the county when due. Stanislaus County property taxes are due in two installments: the first installment by December 1st and the second installment by August 31st.

Lenders typically conduct annual escrow analyses to adjust monthly payments based on actual tax bills and account balances. If your property taxes increase due to reassessment or rate changes, your monthly escrow payment will be adjusted accordingly. You can verify that your lender has paid your taxes by checking the Stanislaus County Treasurer-Tax Collector's website or requesting a tax certificate showing payment history.

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

Q: When are property taxes due in Stanislaus County? A: Property taxes are due in two installments: first installment by December 1st and second installment by August 31st.

Q: What is the homeowner's exemption and how do I apply? A: The homeowner's exemption reduces your assessed value by $7,000, saving approximately $80 annually. Apply using form BOE-266 available from the Stanislaus County Assessor's Office.

Q: How can I pay my property taxes online? A: Visit the Stanislaus County Treasurer-Tax Collector's website to pay online using a bank account or credit card. Additional convenience fees may apply for credit card payments.

Q: What happens if I pay my property taxes late? A: Late payments incur penalties and interest charges. First installment penalties begin December 11th, and second installment penalties begin September 1st.

Q: How do I appeal my property assessment? A: File an assessment appeal application with the Stanislaus County Assessment Appeals Board between July 2nd and November 30th following the tax year.

Q: Can my property taxes decrease if my home value drops? A: Yes, under Proposition 8, you can request a decline-in-value review if your property's market value falls below its assessed value.

Q: What exemptions are available for seniors or disabled persons? A: Disabled veterans may qualify for exemptions using form BOE-261-G. Seniors and disabled persons may qualify for base year value transfers using form BOE-62.

Q: How is my property's assessed value determined? A: Properties are assessed at purchase price plus annual increases capped at 2%, or reassessed to market value upon ownership change or new construction completion.

Verified Sources

Backed by 8 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
Assessor's Officeco.stanislaus.ca.us
02
County
Stanislaus County Taxnacdashboard.nara.gov
03
County
BOE Tax Rate Area Maps – Stanislaus County 2025boe.ca.gov
04
County
Stanislaus County Property Taxnacdashboard.nara.gov
05
County
Assessor's Office - Important Dates Stanislaus Countyco.stanislaus.ca.us
06
Assessor's Office - Formsco.stanislaus.ca.us
07
State
Homeowners' Exemption - California State Board of Equalizationboe.ca.gov
08
Preliminary Budget 2024-25 - FC 052924.xlsxscfpd.us
All sources verified as of 2025 Tax Year

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