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Updated 2025 Tax Year

Teton County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
0.355% of market value (varies by special taxing districts within county)
Exemptions
4+ Available
Section 1

How Property Tax Works

Teton County, Idaho operates under a property tax system that funds essential local services including schools, emergency services, roads, and county operations. The county's property tax rate for the 2025 tax year is 0.355%, which is relatively low compared to many other Idaho counties. This rate represents the combined levy from various taxing entities including the county, school districts, and special service districts.

Property taxes in Teton County are assessed annually based on market value as determined by the County Assessor's Office. It's important to note that actual tax rates can vary significantly by location within the county due to different special taxing districts such as fire districts, cemetery districts, and highway districts. Property owners receive tax bills that reflect all applicable district levies for their specific location, making each property's effective rate unique to its geographic area and the services it receives.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
Base County Rate0.355%Combined rate for FY 2025-2026 levy year
County GeneralVariesCounty operations and services
School DistrictsVariesLocal school district funding
Special DistrictsVariesFire, cemetery, highway, and other special districts
Total Effective Rate~0.355%Average across all districts

Note: The 0.355% rate represents an average across the county. Individual properties may have higher or lower rates depending on their location within specific taxing districts. Rural properties typically have different rates than those in more developed areas due to varying special district assessments. Contact the Teton County Assessor's Office for your property's specific district combination and exact rate.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Teton 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 Teton County are additional property tax assessments that occur when there are changes in property ownership, new construction, or improvements that increase a property's assessed value during the tax year. These taxes are calculated based on the difference between the old and new assessed values, prorated for the remaining months in the tax year.

Common triggers for supplemental taxes include completing new construction projects, adding swimming pools or other significant improvements, or when the Assessor discovers previously unreported improvements during property inspections. For example, if you complete a $100,000 home addition in March and your tax rate is 0.355%, you would owe approximately $296 in supplemental taxes for the remaining 9 months of that tax year ($100,000 × 0.00355 × 9/12 = $296). Supplemental tax bills are typically issued within 60-90 days after the assessment change is processed.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value: $300,000
  • Less: Homestead Credit (if applied): -$125,000
  • Net Taxable Value: $175,000
  • Annual Tax: $175,000 × 0.00355 = $621
  • Monthly Escrow: $52

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Less: Homestead Credit (if applied): -$125,000
  • Net Taxable Value: $475,000
  • Annual Tax: $475,000 × 0.00355 = $1,686
  • Monthly Escrow: $141

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000
  • Less: Homestead Credit (if applied): -$125,000
  • Net Taxable Value: $875,000
  • Annual Tax: $875,000 × 0.00355 = $3,106
  • Monthly Escrow: $259

Note: Homestead Credit requires annual application and caps assessment increases rather than providing a flat reduction. These examples use estimated credit amounts - actual credits may vary.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Teton County require property tax escrow accounts for borrowers with less than 20% down payment. Your lender collects monthly property tax payments as part of your mortgage payment and maintains these funds in an escrow account. The lender pays your property taxes directly to Teton County when they become due on December 20th (first half) and June 20th (second half).

Lenders typically conduct annual escrow analyses to ensure adequate funds are collected. If property taxes increase due to assessment changes or rate adjustments, your monthly escrow payment may increase accordingly. Property owners should verify that their lender pays taxes on time, as you remain ultimately responsible for timely payment even when using escrow. You can monitor your tax payment status through the Teton County Treasurer's office or online payment portal. If you pay taxes directly without escrow, remember that full payment by November 10th avoids any delinquency penalties.

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 Teton County for FY 2025-2026? A: First half taxes are due December 20, 2025, and second half taxes are due June 20, 2026. Full payment by November 10, 2025 avoids delinquency penalties.

Q: What tax credits are available and do I need to apply? A: The primary credit is the Homestead Exemption (up to $125,000 assessed value reduction) which REQUIRES annual application. Veterans may qualify for additional credits that also require application. Contact the County Assessor's office for specific eligibility requirements and application forms.

Q: How does the Homestead credit work? A: The Homestead credit limits assessment increases on your primary residence rather than reducing market value. You must apply annually, and it's not automatic. This credit can significantly reduce your taxable assessed value, especially as property values increase over time.

Q: When does the county assess properties? A: Teton County reassesses all properties annually with values effective January 1st. Assessment notices are typically mailed in April, with appeal deadlines in June. Properties are inspected on rotating cycles unless significant improvements trigger a special assessment.

Q: What are the penalties for late payment? A: Late payments incur penalties and interest charges. First half payments become delinquent after December 20th, and second half after June 20th. Properties can face tax deed procedures if taxes remain unpaid for extended periods.

Q: Can I pay property taxes online? A: Yes, Teton County offers online payment options through their official website. You can pay by electronic check or credit card, though credit card payments may incur processing fees.

Q: Why do special district taxes vary across the county? A: Different areas of Teton County are served by different combinations of fire districts, cemetery districts, highway districts, and other special service districts. Your specific location determines which districts serve your property and thus which additional levies apply to your tax bill.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Teton County Board of Equalization by the fourth Monday in June. You'll need evidence supporting your claim that the assessed value exceeds market value, such as recent comparable sales or professional appraisals.

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