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Updated 2025 Tax Year

Delaware County
Property Tax Guide

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

9 Official Sources
8 min read
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Quick Facts
Tax Rate
0.8%-1.4% of assessed value (varies by taxing districts in your area)
Exemptions
5+ Available
Section 1

How Property Tax Works

Delaware County, Oklahoma operates under the state's property tax system to fund essential local services including schools, county government operations, emergency services, and infrastructure maintenance. Property taxes in Delaware County are assessed annually based on fair cash value, with Oklahoma's base assessment rate around 1% of market value for residential properties.

Actual tax rates vary significantly by location within Delaware County due to multiple overlapping special taxing districts, including school districts, municipalities, technology centers, and other local service districts. The effective tax rate typically ranges from approximately 0.8% to 1.4% of assessed value depending on your specific location and the combination of taxing districts that serve your property. Property owners should verify their specific district assignments and rates, as these determine the total tax liability.

Section 2

What Makes Up Your Tax Bill

ComponentRate RangeDescription
County General0.15-0.25%Basic county services and operations
School District0.35-0.55%Local school district operations and facilities
Career Tech0.05-0.10%Vocational and technical education
Municipal0.10-0.30%City services (if within city limits)
Other Districts0.05-0.25%Fire districts, library districts, other special assessments

Total Estimated Range: 0.80-1.40% of assessed value

Note: These rates apply to the FY 2024-2025 levy year. Actual rates vary by specific location within Delaware County based on which taxing districts serve your property. For exact current rates by district, consult the Delaware County Assessor's office or review the official 2025 Rates of Taxation documents.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Delaware 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 Delaware County are triggered by changes in property ownership, new construction, or improvements that increase assessed value during the tax year. When these events occur, the county assessor calculates additional tax based on the increased assessment for the remaining portion of the tax year.

For example, if you complete a $50,000 home addition in March that increases your assessed value by $50,000, and your total tax rate is 1.2%, you would owe supplemental tax of approximately $450 (75% of the year remaining × $50,000 × 1.2%). The supplemental bill is typically issued 30-60 days after the assessor processes the change and becomes due within 30 days of issuance.

Example Calculation

Example 1: $300,000 Home

  • Market Value: $300,000
  • Assessed Value (≈1%): $3,000
  • Less: Homestead Credit (if applied): -$1,000
  • Net Taxable Value: $2,000
  • Annual Tax (1.1% rate): $220
  • Monthly Escrow: $18

Example 2: $600,000 Home

  • Market Value: $600,000
  • Assessed Value (≈1%): $6,000
  • Less: Homestead Credit (if applied): -$1,000
  • Net Taxable Value: $5,000
  • Annual Tax (1.1% rate): $550
  • Monthly Escrow: $46

Example 3: $1,000,000 Home

  • Market Value: $1,000,000
  • Assessed Value (≈1%): $10,000
  • Less: Homestead Credit (if applied): -$1,000
  • Net Taxable Value: $9,000
  • Annual Tax (1.1% rate): $990
  • Monthly Escrow: $83

Note: Credits shown require separate application and approval. Actual rates vary by specific taxing districts.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Delaware County require property tax escrow accounts for borrowers with less than 20% down payment. Lenders collect monthly payments equal to 1/12th of the annual tax bill plus a cushion amount (typically 2 months) to ensure adequate funds for payment.

Property taxes in Delaware County are typically due in two installments during the fiscal year. Lenders monitor tax bills and make payments directly to the county treasurer when due. Property owners should verify their lender receives updated tax statements after any assessment changes or successful credit applications. If you pay taxes directly without escrow, ensure you budget for the full annual amount and understand the specific due dates for your tax year.

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 Delaware County for FY 2024-2025? A: Property taxes are typically due in two installments. Contact the Delaware County Treasurer's office for specific due dates as they can vary.

Q: What tax credits are available and how do I apply? A: Available credits include Homestead Credit, Double Homestead Credit (seniors/disabled), 100% Disabled Veterans Credit, and Frozen Value Exemption. All require separate applications filed with the County Assessor by March 15th for the following tax year.

Q: How does the Homestead Credit work? A: The Homestead Credit provides tax relief for primary residences and caps annual assessment increases. You must file an application with the County Assessor by March 15th. Late applications after March 15th will be effective the following tax year.

Q: How often are properties reassessed? A: Oklahoma requires annual assessment updates, but major revaluations typically occur every 4-5 years with annual adjustments for market changes.

Q: What happens if I pay my taxes late? A: Late payments incur interest charges of 1% per month on the unpaid balance. The county may also pursue additional collection actions for delinquent accounts.

Q: Can I pay my property taxes online? A: Contact the Delaware County Treasurer's office to verify current online payment options and accepted payment methods.

Q: How do I appeal my assessment? A: File an appeal with the Delaware County Board of Equalization during the designated appeal period, typically in early spring. You must provide evidence supporting your claim for a lower valuation.

Q: Do special district taxes apply to my property? A: Yes, properties may be subject to school districts, fire districts, library districts, and other special assessments depending on location. Check with the County Assessor to determine which districts serve your property.

Verified Sources

Backed by 9 Official Government Sources

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

01
County
Rates of Taxation - Delaware County Auditorauditor.co.delaware.oh.us
02
County
2025 Delaware County Real Estate Tax Deferral Programdelcopa.gov
03
County
2025 Delaware County Budget Orderin.gov
04
2026-2027 Form 921 Application for Homestead Exemptionoklahoma.gov
05
GET THE FACTS! ATTEND THE FINAL PUBLIC MEETINGcityofgroveok.gov
06
County
Homestead Program - Delaware County Auditorauditor.co.delaware.oh.us
07
County
DELAWARE COUNTY - Oklahoma Digital Prairiedigitalprairie.ok.gov
08
County
regular meeting - Delaware Countydelcony.us
09
2026 Form 901 Business Personal Property Renditionoklahoma.gov
All sources verified as of 2025 Tax Year

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