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Updated 2025 Tax Year

Osage County
Property Tax Guide

Everything you need to know about property taxes in Osage County, OK. 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
Varies by district combination - base county rate plus school districts, municipalities, and special districts
1st Due
Jan 1
Exemptions
4+ Available
Section 1

How Property Tax Works

Property taxes in Osage County, Oklahoma serve as the primary funding mechanism for essential local services including public schools, county government operations, fire protection, and various special districts. The county follows Oklahoma's standard assessment practices, with property valued at 11-13.5% of fair cash value depending on property type, and taxes levied annually based on January 1st assessments.

Osage County's property tax rates vary significantly by location within the county due to multiple overlapping taxing districts, including school districts, municipalities, rural fire districts, and other special assessment areas. While the county's base tax structure provides a foundation, your actual tax rate depends on which combination of these districts serves your specific property location.

The effective tax rate in Osage County was approximately 1.5% for the 2024 levy year, though individual properties may experience rates ranging from 1.2% to over 1.8% depending on their specific taxing district combination. Property owners should verify their exact taxing districts through the County Assessor's office, as rates and available tax credits can vary considerably across the county's diverse municipal and rural areas.

Section 2

What Makes Up Your Tax Bill

Based on available data for Osage County levy year 2024:

ComponentRate RangeDescription
County General0.15% - 0.25%County operations, roads, sheriff
School Districts0.80% - 1.20%Local school district operations and bonds
Municipal0.00% - 0.30%City services (varies by municipality)
Rural Fire0.05% - 0.15%Fire protection districts
Special Assessments0.00% - 0.20%Libraries, soil conservation, other districts
Total Effective Rate1.20% - 1.80%Combined rate varies by location

Rates shown apply to levy year 2024 (taxes due October 2024). The 2025 levy year rates are pending adoption by individual taxing districts. School district rates may include voter-approved bond levies that can significantly impact total rates. Contact the Osage County Assessor at (918) 287-4195 to verify the specific taxing districts and rates applicable to your property address.

Section 3

When Are Property Taxes Due?

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

First Installment
Jan 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 Osage County are triggered by two primary events: change in ownership and new construction completed after the January 1st assessment date. When property changes hands or new improvements are substantially completed, the County Assessor may issue a supplemental assessment to capture the change in taxable value during the current tax year.

The supplemental tax is calculated as a prorated amount based on the months remaining in the tax year after the triggering event. For example, if a property sale occurs in April resulting in a $50,000 increase in assessed value, the supplemental tax would apply to 9 months (April through December) of the tax year at the applicable district rate.

For a property with an effective tax rate of 1.5% where new construction adds $100,000 in assessed value in July, the supplemental tax would be: ($100,000 × 0.015 × 6/12 months) = $750. Supplemental tax bills are typically mailed 60-90 days after the assessment change and become delinquent if not paid within 30 days of the bill date.

Example Calculation

Example 1: $300,000 Market Value Home

  • Market Value: $300,000
  • Assessed Value (11.5%): $34,500
  • Less: Homestead Tax Credit: -$1,000
  • Net Taxable Value: $33,500
  • Annual Tax (1.5% rate): $503
  • Monthly Escrow: $42

Example 2: $600,000 Market Value Home

  • Market Value: $600,000
  • Assessed Value (11.5%): $69,000
  • Less: Homestead Tax Credit: -$1,000
  • Net Taxable Value: $68,000
  • Annual Tax (1.5% rate): $1,020
  • Monthly Escrow: $85

Example 3: $1,000,000 Market Value Home

  • Market Value: $1,000,000
  • Assessed Value (11.5%): $115,000
  • Less: Homestead Tax Credit: -$1,000
  • Less: Senior Citizen Credit (if applicable): -$200
  • Net Taxable Value: $113,800
  • Annual Tax (1.5% rate): $1,707
  • Monthly Escrow: $142

Tax credits shown require separate applications to the County Assessor and are not automatically applied. Actual rates vary by specific taxing districts within Osage County.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Osage County require property tax escrow accounts for borrowers with less than 20% equity. Your lender will estimate annual taxes, divide by 12, and collect this amount with your monthly mortgage payment. Since Osage County taxes are due October 1st each year, lenders typically maintain a 2-month cushion in your escrow account.

Lenders perform annual escrow analyses, usually in the fall after tax bills are received. If your taxes increase due to assessment changes or rate increases, your monthly escrow payment may be adjusted upward. Conversely, if taxes decrease or you receive new tax credits, you may receive a refund or reduction in monthly payments.

Property owners should verify that their lender is aware of any tax credits they've applied for, as these may not immediately reflect in escrow calculations. You can monitor your tax obligations directly through the Osage County Treasurer's website and compare with your lender's escrow projections to ensure accuracy.

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Section 6

Frequently Asked Questions

Q: When are property taxes due in Osage County for the current levy year? A: Property taxes are due October 1st annually. For levy year 2024, taxes were due October 1, 2024. The 2025 levy year taxes will be due October 1, 2025.

Q: What tax credits are available and do they require applications? A: Homestead tax credits, senior citizen credits, disabled veteran credits, and agricultural use assessments are available. All require separate applications filed with the County Assessor - none are automatic.

Q: How does the homestead tax credit work? A: Oklahoma's homestead credit typically provides a $1,000 reduction in taxable assessed value and may limit annual assessment increases. You must file an application with the County Assessor by March 15th to qualify for the following tax year.

Q: When are properties assessed and can I appeal? A: Properties are assessed as of January 1st each year. Assessment notices are mailed in spring. Appeals must be filed with the County Board of Equalization within 30 days of receiving your assessment notice.

Q: What are the penalties for late payment? A: Properties become delinquent on October 2nd and accrue interest and penalties. Contact the County Treasurer at (918) 287-2636 for current penalty rates and payment options.

Q: Can I pay property taxes online? A: Yes, Osage County typically offers online payment options through the County Treasurer's website. Verify current payment methods and any associated convenience fees.

Q: Why did my tax rate change from last year? A: Tax rates can change due to school district budget changes, voter-approved bond issues, new special district assessments, or changes in total assessed values within each taxing district.

Q: How do I find out which taxing districts apply to my property? A: Contact the Osage County Assessor's office at (918) 287-4195 or check your annual assessment notice, which lists all applicable taxing districts for your specific property location.

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
Sales Tax News Release January 2026 - Oklahoma.govoklahoma.gov
02
County
Osage County Assessorosagecountyindustrialauthority-ok.gov
03
Calculation Sheet - Oklahoma.govoklahoma.gov
04
County
OSAGE COUNTY - OK State Auditorsai.ok.gov
05
2026 Form 994 Application for Property Valuation Limitation ...oklahoma.gov
06
State
Overview of State Issuesoksenate.gov
07
2026-2027 Form 921 Application for Homestead Exemptionoklahoma.gov
08
Full page fax printdoi.gov
09
County
Osage County - Oklahoma Digital Prairiedigitalprairie.ok.gov
10
Oklahoma.gov Homeoklahoma.gov
All sources verified as of 2025 Tax Year

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