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Updated 2025 Tax Year

Caribou County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.940% average county-wide, varies significantly by taxing district location
Exemptions
5+ Available
Section 1

How Property Tax Works

Property taxes in Caribou County, Idaho, fund essential local services including schools, county operations, emergency services, and various special districts. The county uses market value assessments with property taxes calculated based on the assessed value multiplied by the applicable tax rate for your specific location. For the 2025 tax year, the average property tax rate in Caribou County is 0.940%, though this represents a county-wide average.

Your actual tax rate may vary significantly depending on your property's location within specific taxing districts, including school districts, fire districts, cemetery districts, and other special service areas. These additional levies can cause substantial variation in effective tax rates across different areas of the county. Property owners should verify their specific tax rate by checking with the Caribou County Assessor's Office, as rates are determined by the combination of all applicable taxing districts serving your property location.

Section 2

What Makes Up Your Tax Bill

ComponentRate RangeDescription
County General Levy~0.438%County operations, services, infrastructure
School District Levy~0.520%Local school funding, varies by district
Fire DistrictVariesFire protection services (if applicable)
Cemetery DistrictVariesCemetery maintenance (if applicable)
Highway DistrictVariesLocal road maintenance (if applicable)
Total Average Rate0.940%Combined rate for FY 2025

These rates apply to the FY 2025 levy year and represent the average across Caribou County. Your actual rate depends on which special taxing districts serve your property location. Some areas may have additional levies for ambulance services, library districts, or other local improvements. Contact the Caribou County Assessor's Office at (208) 547-4749 to determine your property's specific tax rate based on applicable districts.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Caribou County, property taxes are due in two installments:

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 in Caribou County are triggered when new construction is completed and assessed after the April assessment date, or when property undergoes significant improvements during the tax year. These taxes represent the prorated amount for the portion of the year after the change occurred, calculated at the same rate as your regular property taxes.

For example, if you complete a new home addition valued at $50,000 in July and your tax rate is 0.940%, you would owe supplemental taxes of approximately $235 ($50,000 × 0.00940 × 6/12 months remaining in the tax year). The county may issue a separate "Subsequent/Occupancy" bill for new construction, which is in addition to the regular November billing that covers the land portion. Property owners typically receive these supplemental bills within 30-60 days after the assessment is completed.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value: $300,000
  • Less: Homeowner's Exemption: $125,000 (if qualified and applied)
  • Net Taxable Value: $175,000
  • Annual Tax: $175,000 × 0.00940 = $1,645
  • Monthly Payment: $137

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Less: Homeowner's Exemption: $125,000 (if qualified and applied)
  • Net Taxable Value: $475,000
  • Annual Tax: $475,000 × 0.00940 = $4,465
  • Monthly Payment: $372

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000
  • Less: Homeowner's Exemption: $125,000 (if qualified and applied)
  • Net Taxable Value: $875,000
  • Annual Tax: $875,000 × 0.00940 = $8,225
  • Monthly Payment: $685

Note: Homeowner's exemption requires annual application and is not automatic. Contact the Caribou County Assessor's Office for current exemption amounts and eligibility requirements.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Caribou County collect property taxes through monthly escrow payments as part of your mortgage payment. Lenders typically collect 1/12th of your estimated annual tax bill each month, plus a cushion amount allowed by federal law. Tax bills are sent to both the property owner and the mortgage company when applicable.

Property taxes are due December 20th each year, with a second installment option due by June 20th for the following portion. Lenders usually pay the full amount by the December deadline to avoid any late fees. Property owners should review their annual escrow analysis to ensure adequate funds are being collected, especially after reassessments or rate changes. If you pay taxes independently, you can make partial payments throughout the year, and the Caribou County Treasurer accepts online payments for added convenience.

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 Caribou County for 2025? A: Property taxes are due by December 20, 2025. If paying in installments, the second half is due by June 20, 2026.

Q: What tax credits are available and do they require application? A: The primary credit is the Homeowner's Exemption, which reduces taxable value by up to $125,000 for owner-occupied homes. This credit requires annual application to the Assessor's Office and is not automatic.

Q: How does the Homestead Exemption work? A: Idaho's homestead exemption reduces the assessed value of owner-occupied homes, effectively lowering your tax bill. You must apply annually with the Caribou County Assessor's Office by April 15th to qualify.

Q: How often are properties reassessed? A: Idaho law requires annual assessment updates. The Caribou County Assessor reviews property values each year based on market conditions, with assessment notices typically mailed in April.

Q: What are the penalties for late payment? A: Late payments incur penalty charges. Contact the Caribou County Treasurer at (208) 547-4324 for current penalty rates and payment options.

Q: Can I pay property taxes online? A: Yes, Caribou County offers online property tax payment options. Visit the county website or contact the Treasurer's office for payment portal access.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Caribou County Board of Equalization by the fourth Monday in June. Contact the Assessor's Office for appeal forms and procedures.

Q: Why do tax rates vary within Caribou County? A: Different areas are served by various special taxing districts (fire, school, highway districts) that add their levies to the base county rate, creating location-specific total rates.

Q: Do I need to reapply for exemptions each year? A: Yes, most tax credits and exemptions require annual application by April 15th. Contact the Assessor's Office at (208) 547-4749 to ensure your applications are current.

Q: What happens if I miss the exemption application deadline? A: Late applications may not be accepted for the current tax year, meaning you'll pay full taxes without the credit. Apply early each year to ensure eligibility.

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