All articles · Updated: Oct 8, 2026

Oklahoma Property Tax Due Dates: Deadlines & Calendar

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Understanding the cycle of property taxes is essential for any homeowner or investor in the Oklahoma City Metro. Missing oklahoma property tax due dates can lead to unnecessary penalties and interest charges. In Oklahoma, the process is a cycle that involves assessment, notification, and two distinct payment windows.

This guide outlines the official timeline and the steps involved in the state's property tax system to help you keep your records organized.

How the Oklahoma Property Tax Cycle Works

Property taxes in Oklahoma are not a single event but a continuous cycle managed by county assessors and treasurers. The process generally follows these stages:

  1. Assessment: The County Assessor determines the value of the property. This is the basis for the tax calculation.
  2. Notification: The assessor sends a Notice of Value to the property owner, detailing the assessed value and any changes from the previous year.
  3. Protest Period: Owners have a specific window to challenge the assessment if they believe the value is incorrect.
  4. Billing: Once the value is finalized and the tax rate (millage) is set by local governing bodies, the County Treasurer issues the tax bill.
  5. Payment: Taxes are paid in two installments throughout the year.

When are Oklahoma Property Tax Due Dates?

Oklahoma utilizes a semi-annual payment system. While the billing process may vary slightly by county, the state-wide statutory deadlines for payment are consistent.

First Half Payment: December 31

The first installment of the property tax is due by December 31 of the tax year. This payment covers the first half of the annual tax liability.

Second Half Payment: March 31

The second installment is due by March 31 of the following calendar year. This completes the payment for the previous tax cycle.

It is important to verify with your specific county treasurer whether your taxes are paid in arrears or in advance, as this can affect how you budget for these dates.

The Assessment and Protest Timeline

Before the payment deadlines arrive, there is a critical phase regarding the valuation of your property. The Oklahoma Constitution and state statutes govern how properties are appraised.

Notice of Value

Typically, the County Assessor sends the Notice of Value during the summer or early fall. This document informs you of the market value assigned to your property for the upcoming tax year.

Filing a Protest

If you disagree with the assessment, you must file a formal protest. This is usually done through the County Board of Equalization. The deadline to file this protest is typically listed on the Notice of Value. If the Board of Equalization does not resolve the issue, the owner may have the option to appeal to the District Court.

Penalties for Late Payments

Failure to meet the oklahoma property tax due dates results in financial penalties. According to the Oklahoma Statutes, the County Treasurer is authorized to charge interest on delinquent taxes.

To avoid these outcomes, owners are encouraged to set up reminders or utilize automatic payment systems provided by their county treasurer's office.

Property Values in the OKC Metro (May 2026)

Property taxes are calculated based on the assessed value of the home. While tax rates vary by jurisdiction, the market value provides a baseline for understanding these assessments. As of May 2026, the median home prices in several areas of the OKC Metro are as follows:

These figures represent median market values and are not indicative of the assessed value used for tax purposes, which is often a percentage of the market value as determined by state law.

Frequently Asked Questions

Where do I pay my property taxes in Oklahoma?

Payments are made to the County Treasurer's office in the county where the property is located. Most counties offer online payment portals, mail-in options, or in-person payments.

What happens if I miss the March 31 deadline?

If the second installment is missed, the account becomes delinquent. Interest will accrue on the unpaid balance, and the property may eventually be listed for a tax sale.

Can I pay my full annual tax bill in December?

Yes, most county treasurers allow homeowners to pay the full year's taxes by the first deadline to avoid tracking the second date in March.

Who determines the tax rate (millage)?

Tax rates are determined by various local taxing districts, including the city, county, and school districts, based on their approved budgets.

Professional Guidance for Your Real Estate Needs

Navigating the complexities of property ownership, from understanding tax calendars to managing a closing, requires professional expertise. While this guide provides the general timeline for oklahoma property tax due dates, every property situation is unique.

If you are looking to buy or sell a property in the OKC Metro, it is important to work with a licensed real estate agent who understands the local market and the legal requirements of the region.

Elite Edge Properties, working under the broker Copper Creek Real Estate, LLC, provides professional representation for clients across the Oklahoma City Metro. Our team of licensed real estate agents is available to assist you in both English and Spanish to ensure a clear and transparent process.

For more information or to discuss your real estate goals, contact us at (405) 467-2418.

General information only. Not legal, tax, or financial advice. Prices and availability can change; verify with official sources and a licensed professional.