Assessment Ratio
11-13.5% (varies by county)
Appeal Deadline
Varies by county (2026)
Official Form
County Equalization Board protest
Risk of Increase
No
How Assessment Works in Oklahoma
Oklahoma assesses property at 11% to 13.5% of fair cash value, depending on the county. The assessment ratio varies because counties may not achieve the statutory 11% target. Your tax bill is based on this assessed value, not the full market value.
How to File in Oklahoma
File a protest with your county assessor or the county Board of Equalization. Deadlines vary by county. Contact your county assessor for specific procedures.
Step-by-Step
Oklahoma Appeal Process
Review your property assessment notice from the county assessor.
Contact the county assessor for an informal discussion.
File a formal protest with the county Board of Equalization.
Attend the hearing and present comparable sales evidence.
If denied, appeal to the Oklahoma Court of Tax Review or district court.
FAQ
Oklahoma Property Tax Appeal Questions
Can my Oklahoma assessment increase on appeal?
No. Oklahoma generally does not increase assessments during the protest process. Your value can only stay the same or go down.
Why do assessment ratios vary by county in Oklahoma?
While the statutory target is 11% of fair cash value, actual ratios vary because some counties have not updated values recently or apply different adjustment factors. The State Board of Equalization publishes ratio studies for each county.
What exemptions are available in Oklahoma?
Oklahoma offers a homestead exemption of $1,000 of assessed value for owner-occupied homes. Additional exemptions are available for seniors (double homestead) and disabled veterans.