HonestCasa logoHonestCasa
All Tax Guides
Updated 2025 Tax Year

Williams County
Property Tax Guide

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

10 Official Sources
8 min read
Calculate Your True CostMortgage Calculator
Quick Facts
Tax Rate
$0.413776 per $100 assessed value (base county rate), varies by district with additional local taxes
1st Due
May 15
2nd Due
Oct 15
Exemptions
4+ Available
Section 1

How Property Tax Works

Williams County, North Dakota operates under a property tax system that funds essential county services including law enforcement, road maintenance, emergency services, and administrative functions. The county's property tax rate for the 2025-2026 fiscal year is $0.413776 per $100 of assessed valuation, though your actual tax rate will vary depending on your specific location within the county due to additional special taxing districts such as school districts, park districts, and other local service areas.

Property taxes in Williams County are assessed annually based on true and full value as determined by the county assessor. North Dakota does not impose an assessment cap, meaning property values can increase without limitation year over year. However, eligible homeowners may qualify for various tax credits that can significantly reduce their tax burden, though these require separate applications and are not automatically applied to your tax bill.

Section 2

What Makes Up Your Tax Bill

ComponentRate per $100Description
County General$0.413776Basic county services, law enforcement, administration
School DistrictVariesLocal school district operations and bonds (varies by district)
City/MunicipalityVariesMunicipal services if located within city limits
Special DistrictsVariesFire districts, park districts, water districts as applicable
Total Effective RateVaries by LocationCombination of all applicable levies

Rates shown are for fiscal year 2025-2026. Your actual total tax rate depends on which special taxing districts serve your property location. Contact the Williams County Assessor for your specific district combination and total rate.

Section 3

When Are Property Taxes Due?

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

First Installment
May 15
Delinquent after Dec 10
Second Installment
Oct 15
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 Williams County are additional property tax assessments that occur when there are changes to property ownership, new construction, or improvements made during the tax year. These taxes are calculated based on the difference between the old and new assessed values, prorated for the portion of the tax year the change was in effect.

Common triggers for supplemental taxes include purchasing a newly constructed home, completing major renovations or additions, or when the county assessor discovers previously unreported improvements. For example, if you complete a $50,000 home addition in June, you would receive a supplemental tax bill for the additional assessed value from June through the end of the tax year, calculated at your applicable tax rate and due within 30 days of the bill date.

Example Calculation

Example 1: $300,000 Home

  • Assessed Value: $300,000
  • Less: Homestead Credit (if qualified): Varies by income
  • Net Taxable Value: $300,000 (assuming no credits)
  • Annual Tax (at base rate): $1,241.33
  • Monthly Escrow: $103.44

Example 2: $600,000 Home

  • Assessed Value: $600,000
  • Less: Homestead Credit (if qualified): Varies by income
  • Net Taxable Value: $600,000 (assuming no credits)
  • Annual Tax (at base rate): $2,482.66
  • Monthly Escrow: $206.89

Example 3: $1,000,000 Home

  • Assessed Value: $1,000,000
  • Less: Homestead Credit (if qualified): Varies by income
  • Net Taxable Value: $1,000,000 (assuming no credits)
  • Annual Tax (at base rate): $4,137.76
  • Monthly Escrow: $344.81

Examples use county base rate only. Actual taxes will be higher due to school and special district levies. Credits require separate application by April 1st deadline.

See How Taxes Affect Your Payment

Property taxes are just part of your total monthly cost. Get the full picture.

Calculate Now
Section 5

Escrow & Property Taxes

Most mortgage lenders in Williams County require property tax escrow accounts, collecting monthly payments along with your mortgage payment to ensure taxes are paid on time. Your lender will analyze your annual tax bill and divide it by 12, often adding a cushion of 1-2 months as required by federal regulations.

Williams County property taxes are typically paid in two installments - the first payment is due November 14th and the second payment due January 16th for the current tax year. Your lender will receive tax bills directly from the county and make payments on your behalf. You should verify annually that your escrow account has adequate funds and that payments are made timely, as you remain ultimately responsible for ensuring your property taxes are paid even when using escrow services.

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 Williams County property taxes due for the current fiscal year? A: For the 2024 tax year (payable in 2025), the first payment is due November 14, 2025, and the second payment is due January 16, 2026.

Q: What tax credits are available and do I need to apply? A: The primary credit is the Homestead Property Tax Credit for qualifying homeowners. This credit requires an annual application due by April 1st and is not automatically applied. The credit amount depends on your income level.

Q: How does the Homestead credit work? A: The Homestead Property Tax Credit helps limit property tax increases for qualifying homeowners based on income thresholds. It does not reduce your property's market value but provides a credit against your tax bill. You must apply annually by April 1st through your local county assessor.

Q: How often are properties reassessed in Williams County? A: Properties are assessed annually in North Dakota. The county assessor reviews property values each year, and there is no assessment cap limiting increases.

Q: What if I disagree with my property assessment? A: You can appeal your assessment to the local board of equalization. Contact the Williams County Assessor's office for specific deadlines and procedures for filing an appeal.

Q: Are there penalties for late property tax payments? A: Yes, late payments incur penalties and interest charges. Contact the Williams County Treasurer's office for specific penalty rates and collection procedures.

Q: Can I pay my property taxes online? A: Contact the Williams County Treasurer's office to inquire about online payment options and accepted payment methods for property taxes.

Q: Why do property tax rates vary within Williams 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 levy rates that are added to the base county rate.

Verified Sources

Backed by 10 Official Government Sources

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

01
County
Williamson County Approves FY25-26 Budget and Sets ...wilcotx.gov
02
Tax Doc
Tax Estimatorrealestate.williamscountyoh.gov
03
Tax Doc
2025 SENATE FINANCE AND TAXATION SB 2320ndlegis.gov
04
County
Real Estate Tax | Williams County, OHwilliamscountyoh.gov
05
County
Manufactured Home Tax | Williams County, OHwilliamscountyoh.gov
06
County
County Treasurerwilliamsoncountyil.gov
07
Tax Doc
Homestead Property Tax Credittax.nd.gov
08
Tax Doc
Homestead Property Tax Credit and Renter's Refundtax.nd.gov
09
State
office of state tax commissionerndlegis.gov
10
County
https://iteam.williamscountyoh.gov/AgendaCenter/Vi...iteam.williamscountyoh.gov
All sources verified as of 2025 Tax Year

See the Full Picture of Your Home Costs

Property taxes are just one piece of homeownership. HonestCasa helps you understand your total monthly cost and explore safe ways to access your home equity.

Total Monthly Cost

Mortgage + taxes + insurance + HOA

Equity Growth

Track how your equity grows over time

Safe Equity Access

Options for projects or debt payoff

Run Your ScenarioTry Calculator

Free • No credit check • 2-minute estimate