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Updated 2025 Tax Year

Riverside County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
1.10% - 1.31%
1st Due
Nov 1
2nd Due
Feb 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Riverside County's property tax system is administered by the County Assessor and collected by the Treasurer-Tax Collector, funding essential local services including schools, fire protection, police, libraries, and various special districts. Property taxes are the primary revenue source for these services, with the tax calculated as a percentage of your property's assessed value as of January 1st each year.

California's property tax system operates under Proposition 13, which limits the base tax rate to 1% of assessed value, plus voter-approved debt service for bonds and special assessments. In Riverside County, the total effective tax rate typically ranges from 1.0% to 1.25% depending on your specific Tax Rate Area (TRA), which determines which combination of school districts, cities, and special districts serve your property. Each TRA has a unique six-digit identifier that corresponds to the specific tax rate applicable to properties within that geographic boundary.

Property taxes in Riverside County are billed annually but paid in two installments. The first installment covers July through December and is due November 1st, becoming delinquent after December 10th. The second installment covers January through June and is due February 1st, becoming delinquent after April 10th. Late payments incur a 10% penalty plus administrative costs.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
General Tax Levy1.00%Base county tax rate established by Proposition 13
School Bonds0.05% - 0.15%Voter-approved debt service for school district facilities
City Bonds0.02% - 0.08%Municipal bonds for city infrastructure and services
Community College Districts0.01% - 0.03%Funding for local community college operations
Special Districts0.02% - 0.05%Fire protection, library, parks, and other local services
Vector Control0.001% - 0.002%Pest and disease vector control services
Total Effective Rate1.0% - 1.25%Combined rate varies by Tax Rate Area (TRA)

The exact tax rate for your property depends on your specific Tax Rate Area, which can be found on your annual tax bill or by searching the Riverside County Assessor's TRA maps. Properties within city limits typically have higher rates due to additional municipal bonds and services, while unincorporated areas may have lower overall rates but different special district assessments.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Riverside 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 triggered by two main events: change in ownership (property sales) and completion of new construction. When either occurs, the County Assessor determines the new market value and issues a supplemental assessment for the difference between the old and new assessed values.

The supplemental tax is calculated using the formula: (New Assessed Value - Previous Assessed Value) × Tax Rate × (Number of Months Remaining in Tax Year ÷ 12). The tax year runs from July 1st to June 30th, so a property purchased in January would have supplemental tax calculated for the remaining 6 months of the tax year.

Example Calculation: If you purchase a home in January for $500,000 that was previously assessed at $350,000, with a tax rate of 1.10%, your supplemental tax would be: ($500,000 - $350,000) × 1.10% × (6 months ÷ 12 months) = $150,000 × 1.10% × 0.5 = $825. This supplemental bill is separate from the regular annual tax bills and typically arrives 4-8 weeks after the triggering event. The new higher assessment then becomes the base for future annual tax bills.

Example Calculation

$300,000 Home:

  • Assessed Value: $300,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $293,000
  • Tax Rate: 1.10% (average Riverside County rate)
  • Annual Tax: $293,000 × 1.10% = $3,223
  • First Installment (due Nov 1): $1,611.50
  • Second Installment (due Feb 1): $1,611.50
  • Monthly (if escrowed): $268.58

$600,000 Home:

  • Assessed Value: $600,000
  • Less Homeowner's Exemption: -$7,000
  • Net Taxable Value: $593,000
  • Tax Rate: 1.15% (higher rate area with more bonds)
  • Annual Tax: $593,000 × 1.15% = $6,819.50
  • First Installment (due Nov 1): $3,409.75
  • Second Installment (due Feb 1): $3,409.75
  • Monthly (if escrowed): $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% (city area with multiple bond measures)
  • Annual Tax: $993,000 × 1.20% = $11,916
  • First Installment (due Nov 1): $5,958
  • Second Installment (due Feb 1): $5,958
  • Monthly (if escrowed): $993

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Section 5

Escrow & Property Taxes

Most homeowners with mortgages have their property taxes collected through an escrow account, where the lender collects monthly payments and pays the county directly before the delinquent dates. Your monthly mortgage payment includes principal, interest, property taxes, and insurance (PITI), with the tax portion deposited into your escrow account.

Lenders typically pay property taxes well before the delinquent dates to avoid penalties. They usually pay the first installment in early November and the second installment in early February. Your annual escrow analysis statement shows exactly when payments were made to Riverside County and any adjustments needed for the following year based on current tax amounts.

To verify your escrow is paying correctly, check your annual tax bill against your escrow analysis statement. You can also verify payments online at www.countytreasurer.org by entering your Assessor's Parcel Number (APN). If you don't have an escrow account, you're responsible for making direct payments to the Riverside County Treasurer-Tax Collector by the due dates to avoid the 10% late penalty plus administrative costs.

If you pay directly, you can pay online at www.countytreasurer.org, by phone at 951-955-3900, in person at any Treasurer-Tax Collector office, or at the new self-service payment kiosk at the County Administrative Center (4080 Lemon St., 1st Floor, Riverside). Bank payments are now available with zero fees for a convenient payment option.

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 property taxes due in Riverside County? Property taxes are due November 1st (first installment) and February 1st (second installment). However, payments are not considered delinquent until after December 10th for the first installment and after April 10th for the second installment. Late payments incur a 10% penalty plus administrative costs.

How do I qualify for the Homeowner's Exemption? You must occupy the property as your principal residence as of January 1st and file an application with the Riverside County Assessor's office. The exemption provides a $7,000 reduction in assessed value (saving approximately $70-80 annually), and once approved, it automatically renews each year as long as you continue to occupy the home as your primary residence.

How is my property assessed in Riverside County? The County Assessor determines your property's assessed value based on its purchase price (for recently sold properties) or its factored base year value plus allowable annual increases under Proposition 13 (maximum 2% per year). New construction and improvements are assessed separately at current market value.

How do I appeal my property assessment? You must file an assessment appeal application with the Riverside County Clerk of the Board within specific deadlines - typically between July 2nd and September 15th for regular appeals, or within 60 days of receiving a notice of supplemental assessment. The appeals board will schedule a hearing to review evidence from both you and the assessor.

What happens if I pay my property taxes late? A 10% penalty plus administrative costs are added to delinquent payments. First installment becomes delinquent after December 10th, and second installment becomes delinquent after April 10th. If taxes remain unpaid for five years, the property may be sold at a tax sale.

How do I pay my property taxes online? Visit www.countytreasurer.org and use your Assessor's Parcel Number (APN) found on your tax bill. You can pay by bank transfer (no fees), credit card, or electronic check. You can also call 951-955-3900 to pay by phone or visit any Treasurer-Tax Collector office location.

What other property tax exemptions are available? Disabled veterans may qualify for exemptions up to $134,706 (basic exemption amount, adjusted annually for inflation) or up to $268,000 for severely disabled veterans. Senior citizens and disabled persons may qualify for property tax postponement programs. Contact the Riverside County Assessor's office for specific eligibility requirements.

How does supplemental tax work when I buy a home? When you purchase property, a supplemental tax bill covers the difference between the previous owner's assessed value and your purchase price, prorated for the remaining months in the tax year (July-June). This is separate from your regular annual tax bill and typically arrives 4-8 weeks after closing. Your new assessment then becomes the base for future annual bills.

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