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Updated 2025 Tax Year

Mineral County
Property Tax Guide

Everything you need to know about property taxes in Mineral 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
1.35% of assessed value (varies by district - base rate plus local districts)
Exemptions
4+ Available
Section 1

How Property Tax Works

Mineral County, Montana operates under a property tax system that funds essential local services including schools, roads, emergency services, and county operations. The county's property tax rate for 2025 is 1.35% of assessed value, which is slightly higher than Montana's base rate of approximately 1%. Property taxes in Mineral County are the primary funding source for local government services and school districts.

It's important to note that actual tax rates vary by location within Mineral County due to special taxing districts such as school districts, fire districts, and other local improvement districts. Your specific tax rate depends on which combination of these districts your property falls within. The county assessor determines property values based on market conditions, and Montana assesses residential property at approximately 1.35% of market value, with no statewide assessment cap limiting annual increases.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
County General0.45%Basic county services, administration, roads
School District0.65%Local school funding, varies by district
Fire District0.15%Fire protection services (where applicable)
Special Districts0.10%Libraries, weed control, other services
Total Base Rate1.35%FY 2025 combined rate

Note: These rates apply to the assessed value (not market value) for levy year 2025. Actual rates vary significantly by location within Mineral County based on which special taxing districts serve your property. Some areas may have additional assessments for school bonds or infrastructure improvements that can increase the total rate.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Mineral 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 Mineral County are triggered by changes in property ownership, new construction, or improvements that increase a property's assessed value during the tax year. When these events occur after the annual assessment date but before the end of the fiscal year, a supplemental tax bill is issued to capture the additional tax owed on the increased value.

The supplemental tax is calculated by taking the difference between the new assessed value and the previous assessed value, then applying the current tax rate for the remaining months in the fiscal year. For example, if you complete a $50,000 home addition in March and your tax rate is 1.35%, you would owe supplemental taxes of approximately $225 (($50,000 × 1.35% × 0.0135) ÷ 12 months × 4 remaining months) for that fiscal year.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value (1.35% of market): $4,050
  • Less: Homestead Credit (if applied): -$405
  • Net Taxable Value: $3,645
  • Annual Tax (1.35% rate): $49.21
  • Monthly Payment: $4.10

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value (1.35% of market): $8,100
  • Less: Homestead Credit (if applied): -$405
  • Net Taxable Value: $7,695
  • Annual Tax (1.35% rate): $103.88
  • Monthly Payment: $8.66

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value (1.35% of market): $13,500
  • Less: Homestead Credit (if applied): -$405
  • Net Taxable Value: $13,095
  • Annual Tax (1.35% rate): $176.78
  • Monthly Payment: $14.73

Note: Tax credits shown require separate applications and are not automatically applied. Actual taxes may vary based on your specific location's special district assessments.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Mineral County require property tax escrow accounts for loans with less than 20% down payment. Your lender collects 1/12 of your estimated annual property tax bill with each monthly mortgage payment, depositing these funds into an escrow account. The lender pays your property taxes directly to Mineral County when they become due on June 30th each year.

Lenders typically collect an initial escrow deposit at closing covering 2-3 months of estimated taxes, then adjust your monthly escrow payment annually based on actual tax bills. You'll receive an annual escrow analysis showing the account activity and any payment adjustments. If you pay off your mortgage or refinance, you're responsible for ensuring property taxes continue to be paid on time, as Montana can place liens on properties with delinquent taxes.

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 Mineral County? A: Property taxes for fiscal year 2025 are due by June 30, 2025. For tax years 2026 and beyond, payments over $50,000 must be made electronically.

Q: What tax credits are available and do they require application? A: Montana offers several tax credits including the Homestead Credit for primary residences and disabled veterans' credits. All credits require separate applications filed with the county assessor and are NOT automatically applied to your tax bill.

Q: How does the Homestead Credit work? A: The Homestead Credit caps the annual increase in your home's assessed value, rather than reducing the market value itself. You must apply for this credit annually with the county assessor - it is not automatic even if you qualified in previous years.

Q: How often are properties reassessed? A: Montana conducts property reappraisals on a cyclical basis. You can appeal your assessed value through the county tax appeal board if you believe it's incorrect, typically within 30 days of receiving your assessment notice.

Q: What are the penalties for late payment? A: Late payments incur penalties and interest charges. Properties with delinquent taxes may be subject to tax liens and eventual tax deed sales if taxes remain unpaid.

Q: Can I pay my property taxes online? A: Contact the Mineral County Treasurer's office directly for current online payment options and accepted payment methods, as these services may vary.

Q: Why do property tax rates vary within the county? A: Your specific tax rate depends on which special taxing districts serve your property, such as school districts, fire districts, library districts, and other local improvement districts. Each district adds its own levy to fund specific services.

Q: Are senior citizens eligible for property tax relief? A: Montana offers property tax assistance programs for qualifying seniors on fixed or limited incomes, providing tax rate reductions of 30% or 50%. Applications are required and must meet specific income and residency requirements - contact the county assessor for details and application deadlines.

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 Taxesgov.mt.gov
02
- 2025 69th Legislature 2025 HB0528.2 - 1docs.legmt.gov
03
County
Annual Property Tax Changes by Countyrevenuefiles.mt.gov
04
County
MAY 2025 - Mineral County Montanaco.mineral.mt.us
05
S 7- 13- 2529(1), MCA. Since rules of statutory ...courts.mt.gov
06
Property Assessmentrevenue.mt.gov
07
Tax Doc
Property Tax Helprevenue.mt.gov
08
Page 1 of 133 ORDINANCE NO. 06-5359 AN ...billingsmt.gov
09
1 - Authorized Print Version – HB 816 HOUSE BILL NO. ...archive.legmt.gov
10
HB0816.4 - 1 - Authorized Print Version – HB 816archive.legmt.gov
All sources verified as of 2025 Tax Year

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