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Updated 2025 Tax Year

Tillman County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Varies by taxing district - no statewide assessment cap, rates differ by school district, fire district, and municipal areas
1st Due
Nov 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Tillman County, Oklahoma operates on a property tax system that funds essential local services including schools, county operations, fire protection, and infrastructure maintenance. Property owners in Tillman County face an effective tax rate that varies significantly based on their specific location within the county due to different combinations of special taxing districts such as school districts, fire districts, and municipal service areas.

The county assesses property at its fair market value without a statewide assessment cap, though various tax credits are available to qualifying property owners. Property taxes in Tillman County are due on November 1st following the levy date and may be paid in two equal installments. Property owners should note that tax rates can vary considerably between different areas of the county, as each property's total rate represents a combination of the county levy plus applicable school district, municipal, and special district assessments that serve that specific location.

Section 2

What Makes Up Your Tax Bill

ComponentRateDescription
County General Levy3.0% (2025)Base county operations, services, and infrastructure
School District LevyVaries by districtLocal school district operations and debt service
Municipal LevyVaries by cityCity services (where applicable)
Fire District LevyVaries by districtLocal fire protection services
Other Special DistrictsVariesAdditional special assessments as applicable
Projected 2026 Rate2.0%Projected county portion for tax year 2026

Note: These rates apply to the FY 2025-2026 tax year. The total effective rate for any property depends on the specific combination of taxing districts that serve that location. School district rates, municipal rates, and special district assessments vary significantly throughout Tillman County, making the actual tax rate location-specific within the county boundaries.

Section 3

When Are Property Taxes Due?

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

First Installment
Nov 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 Tillman County are triggered when there are changes in property ownership or improvements to existing property during the tax year. The most common triggers include new construction, major renovations that increase property value, or changes in property classification. When supplemental taxes are assessed, they represent the difference between the taxes already levied on the property and the taxes that should be levied based on the new assessed value.

For example, if a property owner completes a $50,000 addition to their home mid-year, the county assessor will determine the increased assessed value and calculate additional taxes owed for the remaining portion of the tax year. If the addition was completed in January and increased the assessed value by $50,000, with a combined tax rate of 5%, the supplemental tax would be approximately $2,500 for the full remaining tax year.

Example Calculation

Example 1 - $300,000 Home:

  • Market Value: $300,000
  • Assessed Value: $300,000
  • Less: Homestead Credit (if applied): Varies
  • Net Taxable Value: ~$300,000
  • Annual Tax (at 5% combined rate): $15,000
  • Monthly Escrow: $1,250

Example 2 - $600,000 Home:

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Less: Available Credits (if applied): Varies
  • Net Taxable Value: ~$600,000
  • Annual Tax (at 5% combined rate): $30,000
  • Monthly Escrow: $2,500

Example 3 - $1,000,000 Home:

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000
  • Less: Available Credits (if applied): Varies
  • Net Taxable Value: ~$1,000,000
  • Annual Tax (at 5% combined rate): $50,000
  • Monthly Escrow: $4,167

Note: These examples use a hypothetical 5% combined rate. Actual rates vary by location within Tillman County. All tax credits require separate applications and are not automatically applied.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Tillman County require property tax escrow accounts for borrowers with less than 20% down payment, though some lenders may require escrow regardless of down payment amount. Your lender collects monthly property tax payments as part of your mortgage payment and deposits them into an escrow account. The lender then pays your property taxes directly to Tillman County when they become due on November 1st.

Lenders typically conduct an annual escrow analysis to ensure adequate funds are collected. Since Tillman County allows payment in two equal installments, some lenders may choose to pay the full amount at once in November, while others may split the payment. Property owners should verify their escrow account activity annually and understand that escrow payments may fluctuate based on changes in assessed value or tax rates. If you pay your own taxes without escrow, remember that payments are due November 1st, with the option to split into two equal installments.

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 Tillman County for the current fiscal year? A: Property taxes are due November 1, 2026, for the current tax year. You have the option to pay in two equal installments rather than one lump sum.

Q: What tax credits are available and do they require applications? A: The primary tax credit available is the homestead credit for primary residences. This credit requires a separate application filed with the Tillman County Assessor and is NOT automatically applied. Applications must be filed by March 15 to be effective for the current tax year.

Q: How does the homestead credit work? A: The homestead credit limits annual assessment increases on your primary residence rather than reducing the market value. It requires filing an application with the county assessor and only applies to your primary residence where you live as of January 1st.

Q: What happens if my homestead credit application is filed after March 15? A: Late applications will be processed for the following tax year if you otherwise qualify. The county assessor will notify you of the status and effective date.

Q: How often does Tillman County reassess property? A: Oklahoma law requires counties to reassess all property within the county at least once every four years, though market changes may trigger more frequent updates.

Q: Can I appeal my property assessment? A: Yes, property owners have the right to appeal their assessment. Contact the Tillman County Assessor's office for specific appeal procedures and deadlines.

Q: What are the penalties for late property tax payments? A: Late payments are subject to penalties and interest charges. Contact the Tillman County Treasurer's office for specific penalty rates and payment options.

Q: Are online payment options available? A: Contact the Tillman County Treasurer's office directly to inquire about available online payment methods and accepted forms of payment.

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

Q: If I'm over 65, do I automatically get tax benefits? A: No, age-based tax benefits require separate applications and are not automatically applied. Contact the Tillman County Assessor to determine what benefits may be available and to obtain the necessary application forms.

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