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Updated 2025 Tax Year

Treasure County
Property Tax Guide

Everything you need to know about property taxes in Treasure 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 significantly by location and taxing districts within Treasure County
Exemptions
4+ Available
Section 1

How Property Tax Works

Treasure County, Montana operates under a property tax system that funds essential local services including schools, county government, roads, and emergency services. Property taxes are the primary source of revenue for these critical community functions. The county follows Montana's state-mandated assessment and taxation procedures, with properties assessed at their market value and taxed according to locally-determined mill levies.

The effective tax rate in Treasure County varies significantly by location within the county due to different combinations of special taxing districts. While the overall county experiences substantial rate variations, property owners can expect rates that reflect both county-wide services and local district needs such as school districts, fire districts, and other special assessments. The actual tax burden depends on your property's assessed value, applicable tax credits (which require application), and the specific taxing districts where your property is located.

Section 2

What Makes Up Your Tax Bill

ComponentRate (Mills)Description
County GeneralVariesBasic county services, administration, roads
School DistrictsVariesLocal school funding, varies by district
State Education~6.0State-mandated education funding
Fire DistrictsVariesFire protection services (if applicable)
Special DistrictsVariesWater, sewer, library, or other local services
Total Effective Rate~19% of assessed valueFY 2025-2026 (estimated)

Note: The 19% rate cited reflects recent legislative changes for the 2025 levy year. Actual rates vary significantly by property location within Treasure County due to different special taxing district combinations. Contact the Treasure County Assessor for your specific district's mill levy rates.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Treasure 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 Treasure County are additional tax bills issued when property ownership changes or when new construction is completed after the annual assessment date. These taxes cover the difference between what was originally assessed and what should have been assessed for the current tax year.

Supplemental taxes are calculated by taking the difference between the new assessed value and the previous assessed value, then applying the current year's tax rate to that difference. The tax is prorated based on the number of months remaining in the tax year. For example, if a property transfers in January with a $50,000 increase in assessed value at a 19% effective rate, the supplemental tax would be approximately $9,500 ($50,000 × 0.19) for the full year, prorated for the remaining months of the tax year.

Example Calculation

Example 1: $300,000 Property

  • Assessed Value: $300,000
  • Less: Homestead Tax Credit (if applied): -$0 to -$1,500
  • Net Taxable Value: $298,500 to $300,000
  • Annual Tax (19% rate): $5,670 to $5,700
  • Monthly Payment: $472 to $475

Example 2: $600,000 Property

  • Assessed Value: $600,000
  • Less: Homestead Tax Credit (if applied): -$0 to -$1,500
  • Net Taxable Value: $598,500 to $600,000
  • Annual Tax (19% rate): $11,372 to $11,400
  • Monthly Payment: $948 to $950

Example 3: $1,000,000 Property

  • Assessed Value: $1,000,000
  • Less: Available Tax Credits (if applied): -$0 to -$1,500
  • Net Taxable Value: $998,500 to $1,000,000
  • Annual Tax (19% rate): $18,972 to $19,000
  • Monthly Payment: $1,581 to $1,583

Note: Tax credits shown require annual application and are not automatic. Homestead credits primarily limit assessment increases rather than reduce current market value.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Treasure County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects a monthly amount equal to 1/12 of your estimated annual property tax bill along with your mortgage payment. The lender holds these funds in an escrow account and pays your property taxes directly to the county when due.

Treasure County property taxes are paid in two installments: the first half is due November 30th, and the second half is due May 31st of the following year. Lenders typically pay each installment shortly before the due date. Property owners should verify that their lender has made payments by checking with the Treasure County Treasurer's office, as homeowners remain ultimately responsible for ensuring taxes are paid on time, even when using escrow services.

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Section 6

Frequently Asked Questions

Q: When are property taxes due in Treasure County for the current fiscal year? A: For FY 2025-2026, the first half is due November 30, 2025, and the second half is due May 31, 2026.

Q: What tax credits are available and how do I apply? A: Montana offers homestead tax credits that must be applied for annually. Contact the Treasure County Assessor for specific credit applications and deadlines, as these are not automatic.

Q: How does the homestead credit work? A: The homestead credit primarily caps assessment increases rather than reducing your property's current market value. You must file an application to receive this benefit, and it's not automatically applied.

Q: When are properties reassessed? A: Montana requires property reappraisal every 6 years, with annual updates for market changes. Contact the Treasure County Assessor for your property's specific assessment schedule.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Treasure County Tax Appeal Board within 30 days of receiving your assessment notice. Contact the County Assessor's office for appeal forms and procedures.

Q: What are the penalties for late payment? A: Late payments accrue interest and penalties. Contact the Treasure County Treasurer's office at their temporary hours (3:00 PM, Monday through Friday) for current penalty rates.

Q: Can I pay my property taxes online? A: Check with the Treasure County Treasurer's office for available online payment options and accepted payment methods.

Q: Why do property tax rates vary within Treasure County? A: Different areas of the county are served by different combinations of school districts, fire districts, and other special taxing districts, each with their own mill levies that are added to create your total tax rate.

Q: Where is the Treasure County tax office located? A: The Treasurer's Office is temporarily operating with reduced hours (3:00 PM, Monday through Friday) due to staffing limitations. Contact them for current location and service information.

Verified Sources

Backed by 10 Official Government Sources

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

01
County
Annual Property Tax Changes by Countyrevenuefiles.mt.gov
02
Tax Doc
Property Taxesgov.mt.gov
03
Mill Levy Changes 2025 2026archive.legmt.gov
04
Treasure's Officefergusmt.gov
05
Tax Doc
Treasurer - Property Tax Divisiongallatinmt.gov
06
County
Treasure County: Hometreasurecountymt.gov
07
Montanairs.gov
08
Montana Department of Revenuerevenue.mt.gov
09
1 - Authorized Print Version – HB 816archive.legmt.gov
10
1 - Authorized Print Version – HB 816 HOUSE BILL NO. ...archive.legmt.gov
All sources verified as of 2025 Tax Year

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