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Updated 2025 Tax Year

Orange County
Property Tax Guide

Everything you need to know about property taxes in Orange 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% - 1.31%
1st Due
Nov 1
2nd Due
Feb 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Orange County property taxes are primarily based on California's Proposition 13 system, which limits the base property tax rate to 1% of assessed value, plus voter-approved debt obligations. When you own property in Orange County, your annual property tax bill funds essential local services including public schools, fire protection, police services, libraries, parks, and other municipal services that directly benefit your community.

Property taxes in Orange County typically range from 1.0% to 1.25% of your home's assessed value, depending on your specific Tax Rate Area (TRA). Each TRA represents a unique combination of cities, school districts, and special districts that serve your property. The Orange County Assessor determines your property's assessed value based on either its purchase price (for recently sold properties) or its previous year's value plus an annual increase limited to 2% under Proposition 13. Understanding this system helps you budget accurately for one of homeownership's most significant ongoing expenses.

Your property tax year runs from July 1 through June 30, with taxes paid in two installments. The assessment reflects your property's value as of January 1st each year, which is known as the "lien date." This date determines not only your property's taxable value but also your eligibility for various exemptions, particularly the valuable Homeowner's Exemption that can save you approximately $70-80 annually.

Section 2

What Makes Up Your Tax Bill

ComponentRate RangeDescription
General Tax Levy1.00%Base property tax rate fixed by Proposition 13
School Bonds0.05% - 0.15%Voter-approved bonds for local school districts
City/Municipal Bonds0.02% - 0.08%City infrastructure and municipal bonds
Special Districts0.01% - 0.05%Water districts, fire districts, library districts
Community Facilities Districts0.00% - 0.03%Mello-Roos and other assessment districts
Total Effective Rate1.08% - 1.25%Combined rate varies by Tax Rate Area (TRA)

Your specific property tax rate depends on your Tax Rate Area (TRA), which is determined by your exact location and the combination of local agencies that serve your property. Orange County has hundreds of different TRAs, each with its own unique rate based on the voter-approved bonds and special districts in that area. You can find your specific TRA number and rate on your annual property tax bill or by searching the Orange County Assessor's website using your property address.

The base 1.00% rate is constitutionally fixed and cannot be increased without a statewide vote to amend Proposition 13. However, local voters can approve additional bonds and assessments that add to this base rate, which is why total rates vary across different areas of Orange County.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Orange 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 your property undergoes a "change in ownership" or "new construction" as defined by California law. The most common trigger for homeowners is purchasing a property, which results in a reassessment to current market value (your purchase price). This supplemental assessment covers the period from your purchase date through the end of the current fiscal year (June 30).

The supplemental tax calculation uses this formula: Supplemental Tax = (New Assessed Value - Previous Assessed Value) × Tax Rate × (Months Remaining ÷ 12)

For example, if you purchase a home on October 1, 2025, for $800,000 that was previously assessed at $600,000, with a tax rate of 1.15%, your calculation would be:

  • Value Increase: $800,000 - $600,000 = $200,000
  • Months Remaining: 9 months (October through June)
  • Supplemental Tax: $200,000 × 1.15% × (9 ÷ 12) = $1,725

You will receive your supplemental tax bill separately from the regular annual tax bill, typically 2-6 months after your purchase. This bill will have different due dates than regular property taxes and must be paid in full within 30 days of the bill date to avoid penalties. The Orange County Assessor may take up to 9 months to process your supplemental assessment, but when the bill arrives, it covers only the months you actually owned the property.

Example Calculation

$300,000 Home:

  • Assessed Value: $300,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $293,000
  • Tax Rate: 1.10% (example TRA rate)
  • Annual Tax: $293,000 × 1.10% = $3,223
  • Monthly (if escrowed): $3,223 ÷ 12 = $268.58

$600,000 Home:

  • Assessed Value: $600,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $593,000
  • Tax Rate: 1.15% (example TRA rate)
  • Annual Tax: $593,000 × 1.15% = $6,819.50
  • Monthly (if escrowed): $6,819.50 ÷ 12 = $568.29

$1,000,000 Home:

  • Assessed Value: $1,000,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $993,000
  • Tax Rate: 1.20% (example TRA rate)
  • Annual Tax: $993,000 × 1.20% = $11,916
  • Monthly (if escrowed): $11,916 ÷ 12 = $993

These calculations assume you qualify for and have applied for the Homeowner's Exemption. Without this exemption, you would pay approximately $70-80 more annually depending on your tax rate. Your actual tax rate may vary based on your specific Tax Rate Area, which you can find on your property tax bill or by contacting the Orange County Assessor at (714) 834-2727.

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Section 5

Escrow & Property Taxes

Most homeowners with mortgages have their property taxes collected through an escrow account managed by their mortgage lender or loan servicer. Your lender collects a portion of your estimated annual property tax with each monthly mortgage payment, holds these funds in an escrow account, and pays the Orange County Treasurer-Tax Collector on your behalf before the delinquent dates.

Your lender typically pays the first installment by early December (before the December 10 delinquent date) and the second installment by early April (before the April 10 delinquent date). However, you remain ultimately responsible for ensuring payments are made timely. You should receive an escrow analysis annually from your lender showing how much they collected and paid for property taxes, and you can verify these payments by checking your property tax account online at TaxBill.octreasurer.gov.

If your property taxes increase significantly due to reassessment or new bond measures, your lender may require you to make up any escrow shortage either in a lump sum or through increased monthly payments. Conversely, if taxes decrease or your lender over-collected, you may receive a refund or see reduced monthly payments.

For properties without escrow accounts, you must pay property taxes directly to Orange County. You can pay online at TaxBill.octreasurer.gov using eCheck (no fee) or credit/debit card (service fee applies), by phone at (714) 834-3411, by mail, or in person at the Treasurer-Tax Collector's office. Remember that payments must be received by the delinquent dates (December 10 and April 10) to avoid a 10% penalty plus $23 collection fee.

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 and what happens if I'm late? The first installment is due November 1 and becomes delinquent after December 10. The second installment is due February 1 and becomes delinquent after April 10. If December 10 or April 10 falls on a weekend or holiday, the deadline extends to the next business day. Late payments incur a 10% penalty plus a $23 collection fee.

How do I qualify for the Homeowner's Exemption and how much will I save? You must own and occupy the property as your principal residence on January 1 (lien date). The exemption reduces your assessed value by $7,000, saving approximately $70-80 annually depending on your tax rate. New homeowners typically receive the application automatically, but you can request one by calling (714) 834-3821.

How is my property's assessed value determined? For recently purchased properties, the assessed value equals your purchase price. For properties owned longer, the assessed value is based on the previous year's value plus an annual increase up to 2% (the actual increase is tied to the Consumer Price Index). Proposition 13 protects long-term owners from dramatic assessment increases based on market appreciation.

How do I appeal my property assessment if I think it's too high? You can file an Assessment Appeal Application with the Orange County Clerk of the Board between July 2 and December 1 each year. The filing fee ranges from $65 to several hundred dollars depending on your property's assessed value. Appeals are heard by the Assessment Appeals Board, and you'll need evidence that your property's market value is lower than its assessed value.

What payment options are available for my property taxes? You can pay online at TaxBill.octreasurer.gov using eCheck (no fee) or credit/debit card (service fee applies), by phone at (714) 834-3411, by mail with check or money order, or in person at the Treasurer-Tax Collector's office. Online and phone payments are credited immediately and provide instant receipts.

What other exemptions might I qualify for besides the Homeowner's Exemption? Veterans may qualify for a $4,000 exemption (though the Homeowner's Exemption is usually better), disabled veterans may qualify for $100,000-$150,000 exemptions, and seniors with limited income may qualify for property tax postponement programs. Contact the Orange County Assessor at (714) 834-2727 for specific eligibility requirements.

What is a supplemental tax bill and when will I receive one? When you buy property, you'll receive a supplemental tax bill covering the period from your purchase date through June 30. This bill reflects the difference between the previous owner's assessed value and your purchase price. The bill typically arrives 2-9 months after purchase and has different due dates than regular property taxes.

How can I verify that my mortgage company is paying my property taxes correctly? Check your annual escrow analysis statement and verify payments online at TaxBill.octreasurer.gov using your Assessor's Parcel Number (APN). You can also sign up for email or text notifications when payments are received. If you discover your lender hasn't paid by the delinquent dates, contact them immediately and consider making the payment yourself to avoid penalties.

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