HonestCasa logoHonestCasa
Updated 2025 Tax Year

Dewey County
Property Tax Guide

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

6 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 1% of assessed value (varies significantly by location due to overlapping school districts, municipal districts, and special service areas)
1st Due
Oct 1
Exemptions
2+ Available
Section 1

How Property Tax Works

Dewey County levies property taxes to fund essential county services including public safety, road maintenance, judicial operations, and administrative functions. Property taxes in Oklahoma are administered at the county level, with Dewey County following the state's ad valorem tax system where taxes are levied each October 1 on assessed values as of January 1 of the same year.

The effective property tax rate in Dewey County typically ranges around 1% of assessed value, though actual rates vary significantly by location within the county due to overlapping special taxing districts including school districts, municipal districts, and various special service areas. Property owners may be eligible for certain tax credits that require application, including homestead credits for qualifying primary residences. These credits can provide meaningful tax relief but are not automatically applied and must be requested through the Dewey County Assessor's office.

Section 2

What Makes Up Your Tax Bill

ComponentApproximate RateDescription
County General0.12-0.15%Basic county operations and services
School District0.35-0.55%Local school district operations and debt service
Career Tech0.05-0.08%Vocational and technical education
Municipal0.08-0.15%City services (if within city limits)
Special Districts0.05-0.20%Fire districts, library districts, other special services
Total Effective Rate0.65-1.13%Combined rate varies by location

Rates shown are estimates for FY 2024-2025 levy year and vary significantly by specific taxing districts within Dewey County. Contact the Dewey County Assessor at (918) 534-3312 for exact rates applicable to your property location.

Section 3

When Are Property Taxes Due?

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

First Installment
Oct 1
Delinquent after Dec 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 Dewey County are additional property tax assessments that occur when there are changes in property ownership, completion of new construction, or improvements that increase a property's assessed value after the January 1 assessment date. These supplemental bills cover the tax difference between the old and new assessed values for the remaining portion of the current tax year.

For example, if you complete a home addition in June that increases your property's assessed value by $50,000, you would receive a supplemental tax bill for approximately 75% of the annual tax on that $50,000 increase (covering July through March of the following year). The supplemental tax is calculated using the same tax rates that apply to your regular property tax bill and is typically due within 30 days of the bill date.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value (11-12% of market): $33,600
  • Less: Homestead Credit (if applied): -$1,000
  • Net Taxable Value: $32,600
  • Annual Tax (0.85% rate): $277
  • Monthly Escrow: $23

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value (11-12% of market): $67,200
  • Less: Homestead Credit (if applied): -$1,000
  • Net Taxable Value: $66,200
  • Annual Tax (0.90% rate): $596
  • Monthly Escrow: $50

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value (11-12% of market): $112,000
  • Less: Homestead Credit (if applied): -$1,000
  • Net Taxable Value: $111,000
  • Annual Tax (0.95% rate): $1,055
  • Monthly Escrow: $88

Note: Credits require application and approval. Rates vary by specific location within county.

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 Dewey County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects a monthly amount (typically 1/12 of your annual tax bill plus a small cushion) and pays your property taxes directly to Dewey County when due. Property taxes are typically due in two installments: the first half due by December 31 and the second half due by March 31 of the following year.

Lenders are required to provide an annual escrow statement showing deposits, payments, and account balance. If you believe your escrow payment is incorrect, request a current tax certificate from the Dewey County Treasurer's office to verify the exact amount. Property owners without escrow accounts receive tax bills directly from the county and are responsible for making payments by the due dates to avoid penalties and interest charges.

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 Dewey County for FY 2024-2025? A: The first half payment is due by December 31, 2024, and the second half is due by March 31, 2025. Payments received after these dates are subject to penalties and interest.

Q: What homestead tax credit is available and how do I apply? A: Oklahoma offers a homestead credit that caps annual assessment increases on your primary residence. You must file an application with the Dewey County Assessor's office by March 15 to receive the credit for that tax year. Late applications will be effective the following tax year.

Q: Are there tax credits for senior citizens? A: Yes, taxpayers age 65 and older may qualify for additional property tax credits. Contact the Dewey County Assessor at (918) 534-3312 for current eligibility requirements and application procedures.

Q: How is my property's assessed value determined? A: The County Assessor determines assessed value annually as of January 1, typically at 11-12% of fair market value for residential properties. Assessment notices are mailed in spring.

Q: Can I appeal my property assessment? A: Yes, you can appeal your assessment to the Dewey County Board of Equalization. Appeals must typically be filed by April 1 following the assessment notice date.

Q: What happens if I pay my property taxes late? A: Late payments incur penalties and interest charges. First half payments made after December 31 and second half payments made after March 31 are considered delinquent.

Q: Can I pay my property taxes online? A: Contact the Dewey County Treasurer's office at (918) 534-2293 to inquire about online payment options and accepted payment methods.

Q: How do special district taxes affect my bill? A: Your total tax rate includes charges from all applicable taxing districts where your property is located, such as school districts, fire districts, and municipal districts. These vary significantly throughout Dewey County.

Q: Do I need to reapply for tax credits annually? A: Most credits, including homestead credits, remain in effect once approved unless your eligibility changes. However, you should verify your credits appear on your annual tax statement and contact the Assessor's office if any are missing.

Q: What exemptions are available for personal property? A: Oklahoma voters exempted all intangible personal property from taxation in 2012. Tangible personal property used for business purposes may still be subject to assessment and taxation.

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

Free • No credit check • 2-minute estimate