HonestCasa logoHonestCasa
Updated 2025 Tax Year

Colusa County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
1.0-1.2% of assessed value (1% base rate plus voter-approved bonds and special districts)
1st Due
Nov 1
2nd Due
Feb 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Colusa County's property tax system serves as the primary funding mechanism for essential local services including public education, law enforcement, fire protection, and county operations. Property owners in Colusa County pay taxes based on their property's assessed value, with the total tax rate averaging around 1.0-1.2% of assessed value, though this varies significantly by location within the county.

The actual tax rate you pay depends on your property's location and the special taxing districts that serve your area, such as school districts, fire districts, and community services districts. California's Proposition 13 limits the base property tax rate to 1% of assessed value, but voter-approved bonds and special assessments can increase the total rate. Your annual tax bill funds critical services while being subject to Proposition 13's 2% annual assessment increase cap, providing predictability for long-term property owners.

Section 2

What Makes Up Your Tax Bill

The following represents typical tax rate components for Colusa County properties for FY 2024-2025, though rates vary by specific taxing districts:

ComponentRateDescription
General County~0.25%Basic county services, administration
Schools (Base)~0.65%K-12 education funding
Educational Revenue Augmentation Fund (ERAF)~0.09%State education funding mechanism
Community College~0.03%Yuba Community College District
Special Districts0.00-0.15%Fire protection, cemetery, lighting districts
Voter-Approved BondsVariesSchool bonds, infrastructure improvements
Total Effective Rate~1.02-1.17%Varies by location and districts

Note: These rates apply to your net assessed value after any applicable tax credits. Rates change annually based on local government budgets and vary significantly between different areas of the county depending on which special districts serve your property.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Colusa 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's assessed value changes mid-year due to ownership changes, new construction, or property improvements. When you purchase a property or complete construction, the Assessor's Office calculates the difference between the old and new assessed values and prorates the additional tax for the remaining months in the fiscal year.

For example, if you purchase a home in Colusa County in October 2024 that was previously assessed at $200,000 but sells for $400,000, you'll receive a supplemental tax bill for the increased assessment ($200,000 difference) covering October through June. The supplemental tax would be approximately $2,000-2,340 (depending on your tax rate) prorated for nine months, or about $1,500-1,755. Supplemental tax bills have specific due dates printed on the bill and are separate from your regular annual property tax payments.

Example Calculation

Here are three examples showing annual property tax calculations for different home values in Colusa County, assuming a 1.10% effective tax rate:

$300,000 Home:

  • Assessed Value: $300,000
  • Less: Homeowner's Exemption: -$7,000 (assessed value reduction)
  • Net Taxable Value: $293,000
  • Annual Tax (1.10%): $3,223
  • Monthly Escrow: $269

$600,000 Home:

  • Assessed Value: $600,000
  • Less: Homeowner's Exemption: -$7,000 (assessed value reduction)
  • Net Taxable Value: $593,000
  • Annual Tax (1.10%): $6,523
  • Monthly Escrow: $544

$1,000,000 Home:

  • Assessed Value: $1,000,000
  • Less: Homeowner's Exemption: -$7,000 (assessed value reduction)
  • Net Taxable Value: $993,000
  • Annual Tax (1.10%): $10,923
  • Monthly Escrow: $910

Note: The Homeowner's Exemption reduces assessed value by $7,000 and requires application. Additional tax credits may be available for seniors, veterans, or disabled persons but require separate applications.

See How Taxes Affect Your Payment

Property taxes are just part of your total monthly cost. Get the full picture.

Calculate Now
Section 5

Escrow & Property Taxes

Most mortgage lenders in Colusa County require borrowers to maintain an escrow account for property taxes and insurance. Your lender collects monthly payments equal to 1/12 of your estimated annual property tax bill, holds these funds in escrow, and pays your property taxes directly to the county when due. Lenders typically collect an additional 2-3 months' worth of taxes at closing to ensure adequate funds are available.

Property taxes in Colusa County are paid in two installments: the first installment covers July through December and is due by December 10th, while the second installment covers January through June and is due by April 10th. Your lender will receive tax bills directly and make these payments on your behalf. You should verify that payments are made timely and review your annual escrow analysis to ensure adequate funding, as supplemental taxes or assessment increases may require escrow adjustments.

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 Colusa County? A: For FY 2024-2025, the first installment is due December 10, 2024, and the second installment is due April 10, 2025. Unsecured property taxes are due August 31st annually.

Q: What tax credits are available and how do I apply? A: The Homeowner's Exemption provides a $7,000 reduction in assessed value and requires application with the Assessor's Office. Additional credits may be available for seniors (55+), veterans with service-connected disabilities, and disabled persons, but all require separate applications with specific documentation and deadlines.

Q: How does the Homeowner's Exemption work? A: This is not a credit but an exemption that reduces your assessed value by $7,000, saving approximately $70-80 annually in taxes. You must apply with the Assessor's Office and requalify if you move. It's not automatic and must be claimed for each property.

Q: When are properties reassessed? A: Properties are reassessed to current market value when sold or when ownership transfers occur. Otherwise, assessments can only increase by a maximum of 2% per year under Proposition 13, regardless of market value increases.

Q: How do I appeal my assessment? A: Assessment appeals must be filed between July 2 and September 15 (or November 30 if the assessed value increased). Contact the Clerk of the Assessment Appeals Board at the County Assessor's Office at (530) 458-0450.

Q: What are the penalties for late payment? A: A 10% penalty applies to payments received after April 10th for the second installment and after December 10th for the first installment. Additional penalties and interest accrue monthly.

Q: Can I pay property taxes online? A: Yes, contact the Colusa County Tax Collector at (530) 458-0440 or visit the County of Colusa website for online payment options and current payment methods.

Q: What are special district taxes on my bill? A: These fund local services like fire protection, street lighting, or community services districts. The specific districts and rates depend on your property location and the services provided to your area.

Q: How are supplemental tax bills calculated? A: Supplemental taxes cover the difference between old and new assessed values, prorated for the remaining months in the fiscal year. Due dates are specific to each bill and printed on the statement.

Q: Where can I get help with property tax questions? A: Contact the Colusa County Assessor's Office at (530) 458-0450 for assessment questions or the Tax Collector at (530) 458-0440 for payment and billing questions. The office is located at 546 Jay Street, Colusa, CA 95932.

See the Full Picture of Your Home Costs

Property taxes are just one piece of homeownership. HonestCasa helps you understand your total monthly cost and explore safe ways to access your home equity.

Total Monthly Cost

Mortgage + taxes + insurance + HOA

Equity Growth

Track how your equity grows over time

Safe Equity Access

Options for projects or debt payoff

Free • No credit check • 2-minute estimate