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Updated 2025 Tax Year

Imperial County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
1.05% to 1.5% (varies by district), base 1% + voter-approved additions
1st Due
Nov 1
2nd Due
Feb 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Imperial County operates under California's property tax system, where property taxes serve as the primary funding source for local government services including schools, public safety, infrastructure, and county operations. The county follows California's Proposition 13 framework, which establishes a base tax rate of approximately 1% of assessed value, with additional voter-approved taxes and assessments layered on top.

Property tax rates in Imperial County vary significantly by location within the county due to special taxing districts, school districts, and community facilities districts (CFDs/Mello-Roos). While the countywide average effective rate is approximately 1.1-1.3%, individual parcels may experience rates ranging from 1.05% to over 1.5% depending on their specific tax rate area (TRA). Each property's tax bill reflects the combination of the base county levy plus any applicable special district assessments, school bonds, and infrastructure financing districts that serve that particular area.

Section 2

What Makes Up Your Tax Bill

ComponentRate RangeDescription
Base County Rate~1.000%Core county services, schools (Prop 13 base)
School Districts0.050-0.150%Local school bonds and parcel taxes
Community College0.020-0.040%Imperial Valley College district
Water/Irrigation0.010-0.080%Imperial Irrigation District assessments
Fire Protection0.020-0.060%Local fire protection districts
Hospital Districts0.030-0.070%Pioneers Memorial, Heffernan Memorial
City Taxes0.000-0.100%Municipal bonds (Brawley, Calexico, El Centro, etc.)
CFD/Mello-Roos0.100-0.400%Infrastructure financing in newer developments
Total Effective Rate1.05-1.50%Varies by Tax Rate Area (TRA)

Rates shown are for FY 2024-2025 levy year. Actual rates vary significantly by specific location and Tax Rate Area within Imperial County. Contact the Imperial County Assessor-Recorder for your property's specific TRA rate.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Imperial 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 there's a change in ownership or new construction that increases a property's assessed value mid-tax year. In Imperial County, when you purchase property or complete substantial improvements, the Assessor must reassess the property at current market value, creating a "supplemental assessment" for the remaining months of the tax year.

The supplemental tax is calculated by taking the difference between the old and new assessed values, multiplying by your property's tax rate, then prorating for the remaining months in the fiscal year (July 1 to June 30). For example, if you purchase a $400,000 home in January that was previously assessed at $250,000, with a 1.2% tax rate, your supplemental tax would be: ($400,000 - $250,000) × 1.2% × (6 months ÷ 12 months) = $900. Supplemental tax bills are typically mailed 4-8 weeks after the triggering event and have separate due dates from your regular property tax installments.

Example Calculation

Example 1: $300,000 Home in Basic Tax Area

  • Market/Assessed Value: $300,000
  • Homeowners' Exemption: -$7,000 (saves ~$77/year)
  • Net Taxable Value: $293,000
  • Tax Rate: 1.15%
  • Annual Tax: $3,370
  • Monthly (if escrowed): $281

Example 2: $600,000 Home with Senior Credit

  • Market/Assessed Value: $600,000
  • Homeowners' Exemption: -$7,000
  • Senior Citizens' Property Tax Postponement: Varies by income
  • Net Taxable Value: $593,000
  • Tax Rate: 1.25%
  • Annual Tax: $7,413
  • Monthly (if escrowed): $618

Example 3: $1,000,000 Home in Mello-Roos District

  • Market/Assessed Value: $1,000,000
  • Homeowners' Exemption: -$7,000 (must apply)
  • Net Taxable Value: $993,000
  • Tax Rate: 1.45% (includes CFD assessment)
  • Annual Tax: $14,399
  • Monthly (if escrowed): $1,200

All tax credits and exemptions require annual application and are NOT automatic. Contact Imperial County Assessor-Recorder to apply.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Imperial County require borrowers to maintain an escrow account for property taxes, especially for loans with less than 20% down payment. Your lender collects 1/12th of your estimated annual property tax bill with each monthly mortgage payment and pays the county directly when taxes are due. Lenders typically collect 2-3 months of additional property taxes at closing to establish the escrow account cushion.

Property taxes are paid in two installments: the first installment covers July-December and is due November 1st, while the second installment covers January-June and is due February 1st. Your lender should pay these on your behalf, but you remain ultimately responsible for ensuring payments are made on time. Review your annual escrow analysis statement carefully, as Imperial County's varying special assessments can cause significant changes in your tax bill. You can verify payments were made by checking the Imperial County Tax Collector's website or calling their office directly.

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 Imperial County for FY 2024-2025? A: First installment is due November 1, 2024 (becomes delinquent December 10, 2024). Second installment is due February 1, 2025 (becomes delinquent April 10, 2025).

Q: What tax credits are available and do they require application? A: Homeowners' Exemption ($7,000 assessed value reduction, must apply), Veterans' Exemption (up to $196,261 for disabled veterans, requires application), Senior Citizens' Property Tax Postponement (income-qualified, requires annual application), and Disabled Persons' Exemption (requires application and income qualification). None are automatic.

Q: How does the Homestead exemption work in California? A: California doesn't have a traditional "Homestead exemption." The Homeowners' Exemption reduces assessed value by $7,000. Proposition 19 provides property tax savings for seniors, disabled persons, and disaster victims who transfer their tax basis to a new home, but this requires application and has strict eligibility rules.

Q: When does the county reassess my property? A: Under Proposition 13, property is reassessed at market value when ownership changes or new construction is completed. Otherwise, assessed value can only increase by a maximum of 2% annually. The county may also reassess downward if market values decline significantly (Proposition 8).

Q: What are the penalties for late payment? A: A 10% penalty is added if first installment isn't paid by December 10th, or second installment by April 10th. Additional costs and redemption fees apply if taxes remain unpaid, potentially leading to tax lien sales after five years of delinquency.

Q: Can I pay property taxes online? A: Yes, Imperial County offers online payment through their Tax Collector website. You can pay by e-check or credit card, though credit card payments include convenience fees. You'll need your Assessor's Parcel Number (APN) to make payments.

Q: How do I appeal my property assessment? A: File an Application for Changed Assessment with the Assessment Appeals Board between July 2 and either September 16 or December 2, 2024 (depending on when assessment notices were mailed). You must demonstrate your property's assessed value exceeds its fair market value on the January 1st lien date.

Q: Why did I receive a supplemental tax bill? A: Supplemental taxes are issued when property changes ownership or new construction is completed mid-tax year. The bill covers the difference between your old and new assessed values for the remaining months of the fiscal year, and is separate from your regular installment payments.

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