Oklahoma Law Requires Timely Payment of Taxes Under Written Notice of Protest

This update highlights recent developments affecting commercial property taxation in Oklahoma. It reflects analysis prepared by an APTC member firm based on conditions at the time of publication.

Treasurers across Oklahoma counties will begin mailing 2026 tax bills in October. By law, the taxes are due by December 31st. However, the taxpayers have the option of making two equal installment payments, one on December 31st and the other on the following March 31st.

If a taxpayer has a protest pending, it is imperative that the taxes be paid timely, with an accompanying written notice of protest on OTC Form 990 specifying the amount of tax being paid under protest. By law, the treasurer must escrow the disputed taxes pending outcome of the appeal. Failure to pay timely, or failure to pay under notice of protest, subjects the taxpayer’s appeal to dismissal.

Jay W. Dobson
Elias, Books, Brown & Nelson, P.C.
Member firm, American Property Tax Counsel (APTC)

For guidance on how these developments may apply to your property or portfolio, please contact the APTC representative listed above.