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Updated 2025 Tax Year

Teton County
Property Tax Guide

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

10 Official Sources
8 min read
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Quick Facts
Tax Rate
Varies by district location, experiencing 19% increase for 2025 tax year
1st Due
Nov 30
2nd Due
May 31
Exemptions
5+ Available
Section 1

How Property Tax Works

Teton County, Montana operates a property tax system that funds essential local services including schools, county government, fire protection, and various special districts. Property taxes are the primary revenue source for these services, with tax rates varying significantly by location within the county due to different combinations of special taxing districts such as school districts, fire districts, and conservation districts.

The Teton County property tax system is experiencing notable increases, with rates expected to rise by approximately 19% for the 2025 tax year, reflecting a 5.2% annual average increase over the past decade. Property owners should be aware that their actual tax rate depends on their specific location within the county, as each area may be served by different special districts that add their own levies to the base county rate. The Montana Department of Revenue oversees the assessment process, while local jurisdictions set their individual mill levies based on budgetary needs.

Section 2

What Makes Up Your Tax Bill

Based on available data for Teton County, MT (rates vary by special taxing district):

ComponentEstimated Rate RangeDescription
County General15-25 millsCounty operations, roads, law enforcement
School District180-220 millsK-12 education funding
State Education95 millsState-mandated education levy
Fire District10-30 millsFire protection services (varies by district)
Conservation District2-5 millsNatural resource management
Total Estimated Range302-375 millsVaries significantly by location

Note: These rates apply to the 2025 levy year and are estimates based on historical data and projected increases. One mill equals $1 per $1,000 of taxable assessed value. Your actual rate depends on which special districts serve your property location. Contact the Teton County Clerk and Recorder for your specific district combination.

Section 3

When Are Property Taxes Due?

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

First Installment
Nov 30
Delinquent after Dec 10
Second Installment
May 31
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 in Teton County are additional property tax bills issued when there are changes to property ownership, new construction, or improvements that increase assessed value during the tax year. These taxes cover the period from when the change occurred until the end of the current tax year.

Supplemental taxes are calculated by applying the current tax rate to the difference between the old and new assessed values, prorated for the remaining months in the tax year. For example, if you complete a $100,000 home addition in July and your total tax rate is 350 mills, you would owe supplemental taxes on the $100,000 increase for the remaining 5 months of the tax year. This would result in approximately $145 in supplemental taxes ($100,000 ÷ 1,000 × 0.350 × 5/12 months). Supplemental tax bills are typically issued 30-60 days after the county assessor processes the change and become due 30 days from the issue date.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessment Ratio: 100% of market value
  • Assessed Value: $300,000
  • Less: Homestead Credit (if applied): Caps assessment increases to ~3-10%
  • Taxable Value: $300,000 (assuming no credits applied)
  • Annual Tax (at 350 mills): $1,050
  • Monthly Escrow: $88

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessment Ratio: 100% of market value
  • Assessed Value: $600,000
  • Less: Available tax credits (application required): Varies
  • Taxable Value: $600,000 (assuming no credits applied)
  • Annual Tax (at 350 mills): $2,100
  • Monthly Escrow: $175

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessment Ratio: 100% of market value
  • Assessed Value: $1,000,000
  • Less: Applicable tax credits (must file application): Varies
  • Taxable Value: $1,000,000 (assuming no credits applied)
  • Annual Tax (at 350 mills): $3,500
  • Monthly Escrow: $292

Note: Tax credits require separate applications and are not automatically applied. Contact the Teton County Assessor for available programs and application requirements.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Teton County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects 1/12 of your estimated annual property tax bill each month along with your mortgage payment. The lender maintains these funds in an escrow account and makes payments directly to Teton County on your behalf.

Given Teton County's semi-annual payment schedule with due dates of November 30 and May 31, your lender will typically make two payments per year. Lenders usually maintain a cushion of 2-3 months of tax payments in your escrow account to handle potential increases. You'll receive an annual escrow analysis showing how your funds were used and any adjustments needed for the coming year. If property taxes increase significantly (as projected with the 19% increase for 2025), your monthly escrow payment will be adjusted accordingly, sometimes requiring a one-time catch-up payment to bring the account balance to the required level.

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 the current tax year? A: Property taxes are due November 30 and May 31 of each year. You can pay half the annual amount by each due date or pay the full amount by November 30. Only half or full payments are accepted - partial payments are not allowed.

Q: What tax credits are available and do they require applications? A: Montana offers several tax credit programs that require separate applications, including disabled veteran credits, elderly/low-income credits, and agricultural exemptions. Most credits are NOT automatically applied - you must file an application with the Teton County Assessor's office by specific deadlines.

Q: How does the Homestead Credit work in Montana? A: The homestead credit doesn't reduce your market value but instead caps the annual increase in your assessed value to help limit tax growth. This credit requires an application to be filed with the county assessor and must be renewed periodically. It limits assessment increases rather than providing a flat reduction.

Q: What happens if I pay my property taxes late? A: Late payments incur penalties and interest charges. Contact the Teton County Treasurer's office for current penalty rates and payment options if you've missed a due date.

Q: Can I pay my property taxes online? A: Contact the Teton County Treasurer's office for current online payment options. Note that starting January 1, 2026, electronic payments will be required for tax bills of $50,000 or more.

Q: How often are properties reassessed in Teton County? A: Montana law requires properties to be reassessed periodically. Contact the Teton County Assessor's office for the current assessment cycle and your property's next scheduled reassessment date.

Q: How do I appeal my property tax assessment? A: Assessment appeals must be filed with the Teton County Tax Appeal Board within specific timeframes after receiving your assessment notice. Contact the County Assessor's office for appeal forms and deadlines.

Q: Why do tax rates vary within Teton County? A: Different areas of the county are served by different combinations of special districts (school districts, fire districts, conservation districts), each with their own mill levies. Your total tax rate depends on which districts serve your specific property location.

Q: How will the projected 19% tax increase for 2025 affect my bill? A: The increase will vary by property and location within the county. Properties with homestead credits or other assessment limitations may see smaller increases than those without such protections. Contact the County Assessor to understand how this increase may specifically impact your property.

Q: Where can I find information about special district taxes that apply to my property? A: Contact the Teton County Clerk and Recorder's office to determine which special taxing districts serve your property address, as this combination determines your total mill levy rate.

Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
Tax Doc
Property Tax Departmenttetoncountymt.gov
02
County
Teton County Montanatetoncountymt.gov
03
Mill Levy Changes 2025 2026archive.legmt.gov
04
Property Assessmentrevenue.mt.gov
05
Tax Doc
Property Tax Search Appgis.tetoncountywy.gov
06
Montanairs.gov
07
Property Assessment Divisionsvc.mt.gov
08
Tax Doc
Property Taxesgov.mt.gov
09
Audit Report Submittal In-Lieu-of-AFR Recommended Formatsfsd.mt.gov
10
1 - Authorized Print Version – HB 816archive.legmt.gov
All sources verified as of 2025 Tax Year

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