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Updated 2025 Tax Year

Mountrail County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 1% of assessed value, varies significantly by location due to different taxing districts
Exemptions
4+ Available
Section 1

How Property Tax Works

Mountrail County's property tax system funds essential local services including schools, roads, law enforcement, emergency services, and county operations. Property taxes are levied annually based on assessed property values, with the county serving as the collection agent for various taxing entities including the county government, school districts, townships, and special assessment districts.

The effective property tax rate in Mountrail County typically ranges around 1% of assessed value, though this varies significantly by location within the county due to different combinations of special taxing districts. Properties are assessed at full market value without an assessment cap, and the actual tax rate depends on which school district, township, and special districts serve your specific property location. The county commissioners determine final tax rates annually, usually finalizing them by late fall for the following tax year.

Your total property tax bill combines levies from multiple entities that may include: Mountrail County general levy, your local school district, township or city government, park districts, water districts, and any special assessment districts. This means two properties of equal value can have different tax bills depending on their precise location and the services provided in that area.

Section 2

What Makes Up Your Tax Bill

Note: 2025 tax rates have not yet been finalized by county commissioners. The following represents typical levy components:

ComponentApproximate Rate (mills)Description
County General45-55Basic county services, roads, administration
School District120-180Varies by district (Stanley, New Town, etc.)
Township/City15-40Local municipal services
Park District5-15Recreation facilities and services
Water/Sewer Districts10-25Infrastructure maintenance
Special AssessmentsVariableRoad improvements, drainage projects

Total Effective Rate: 195-315 mills (1.95% - 3.15%)

These rates apply to Levy Year 2025 (payable in 2025) and vary significantly based on your property's location within specific taxing districts. Contact the Mountrail County Assessor at (701) 628-2915 for your property's exact tax rate combination.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Mountrail 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 Mountrail County are additional property taxes assessed when significant changes occur to your property during the tax year. Common triggers include new construction completion, property improvements exceeding $1,000 in value, changes in property ownership that reveal previously unreported improvements, or corrections to assessment errors.

Supplemental taxes are calculated by applying the current year's tax rate to the difference between your property's previous assessed value and new assessed value. The tax is then prorated based on how many months remain in the tax year after the change occurred. For example, if you complete a $50,000 addition in July, you would owe supplemental tax on that $50,000 increase for the remaining 9 months of the tax year.

Example: A $40,000 garage addition completed in September would generate approximately $400 in supplemental tax (assuming a 2% total tax rate), prorated for 7 months = $233. Supplemental tax bills are typically issued within 60-90 days of the assessment change and have the same due date as regular property taxes.

Example Calculation

$300,000 Home Example:

  • Assessed Value: $300,000
  • Homestead Tax Credit Applied: -$3,000 (requires application)
  • Net Taxable Value: $297,000
  • Tax Rate: 2.5% (250 mills)
  • Annual Tax: $7,425
  • Monthly (if escrowed): $619

$600,000 Home Example:

  • Assessed Value: $600,000
  • Homestead Tax Credit Applied: -$3,000 (requires application)
  • Net Taxable Value: $597,000
  • Tax Rate: 2.3% (230 mills)
  • Annual Tax: $13,731
  • Monthly (if escrowed): $1,144

$1,000,000 Property Example:

  • Assessed Value: $1,000,000
  • Homestead Tax Credit Applied: -$3,000 (requires application)
  • Net Taxable Value: $997,000
  • Tax Rate: 2.2% (220 mills)
  • Annual Tax: $21,934
  • Monthly (if escrowed): $1,828

Note: Tax credits shown require annual application and eligibility verification. Actual rates vary by specific taxing districts serving your property location.

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Section 5

Escrow & Property Taxes

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

Lenders typically conduct annual escrow analyses in late fall, comparing collected funds to actual tax bills. If your property taxes increase significantly due to reassessment or rate changes, your monthly escrow payment may increase. Conversely, if taxes decrease, you may receive a refund of excess escrow funds.

Property owners should verify their tax bills even when escrowed, as lenders occasionally make payment errors or miss supplemental tax bills. You can monitor your account and verify payments through the Mountrail County Treasurer's office at (701) 628-2405. If you pay taxes directly without escrow, payments are due April 15th annually, with a 5% penalty applied to late payments after May 15th.

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 Mountrail County? A: Property taxes are due April 15th annually. For Tax Year 2025, the due date is April 15, 2025, with a 5% penalty applied after May 15, 2025.

Q: What tax credits are available and do I need to apply? A: The primary credit is the Homestead Property Tax Credit, which can reduce your tax bill by up to several thousand dollars annually. This credit REQUIRES an annual application filed with the North Dakota Tax Department. Other credits may include disabled veteran credits and elderly/disabled person credits - all require separate applications.

Q: How does the Homestead Tax Credit work? A: The Homestead Credit doesn't reduce your property's market value, but rather caps annual assessment increases and provides a direct tax bill reduction. You must apply annually by April 15th through the ND Tax Department. This is NOT automatic and requires income eligibility verification.

Q: How often are properties reassessed in Mountrail County? A: Properties are subject to annual assessment review, with comprehensive revaluations typically occurring every 6 years. The county assessor may adjust individual property values annually based on market conditions, improvements, or sales data.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the Mountrail County Board of Equalization by April 15th. Contact the Assessor's office at (701) 628-2915 for appeal forms and procedures. You'll need comparable sales data or professional appraisals to support your appeal.

Q: What happens if I pay my taxes late? A: A 5% penalty is added to unpaid taxes after May 15th, with an additional 1% interest charged monthly. Properties become delinquent after three years, potentially leading to tax deed proceedings.

Q: Can I pay property taxes online? A: Contact the Mountrail County Treasurer at (701) 628-2405 to inquire about online payment options and accepted payment methods.

Q: Why do properties in the same neighborhood have different tax rates? A: Tax rates vary based on special taxing districts serving each property. Different school districts, water districts, townships, and special assessment areas create rate variations even between neighboring properties.

Q: What are special assessments and how do they affect my bill? A: Special assessments fund specific improvements like road paving, drainage projects, or utility installations that benefit particular properties. These appear as separate line items on your tax bill and may continue for multiple years until the improvement costs are recovered.

Q: Where can I get current tax rate information? A: Contact the Mountrail County Assessor at (701) 628-2915 or visit the county website at www.co.mountrail.nd.us. Tax rates are typically finalized by county commissioners in late fall for the following tax year.

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