Tulsa County homeowners pay a median of $2,227 a year in property tax on a median home value of $230,400. Its effective tax rate (property taxes paid as a share of home values, per the Tax Foundation) is 0.98%, the highest of 77 Oklahoma counties. The Tulsa County Assessor sets the fair cash (market) value of every home in Tulsa County each year and mails a Notice of Increase in Valuation when it goes up. You protest to the assessor first; if you disagree with the result, the Tulsa County Board of Equalization hears your formal appeal.
Closed for 2026As of October 21, 2026, the 2026 protest season is over: county boards of equalization adjourned by May 31 (or a short extension), and only appeals already filed in district court are still moving. The next window opens when assessors mail 2027 Notices of Increase in Valuation early in 2027 (30 days from each notice's mailing date); if your value does not go up, the 2027 deadline is Monday, April 5, 2027.
File a written protest with the county assessor within 30 calendar days of the mailing date printed on your Notice of Increase in Valuation. If you got no notice because your value did not rise, you can still protest, but only on or before the first Monday in April. Use OTC Form 974. If you miss the deadline, the assessor's value is final for that year. The whole process must normally finish by May 31, when county boards of equalization adjourn (some boards extend). Example: Tulsa County for 2026 took protests within 30 days of each notice's mailing date, or by Monday, April 6, 2026 for owners who got no notice; its board of equalization adjourns May 31 unless it votes to extend to June 30.
Phone: 918-596-5100
Email: [email protected]
Address: 218 W. 6th Street, 5th Floor, Tulsa, OK 74119
County Assessor: John A Wright
Official website: assessor.tulsacounty.org
The county assessor can show you your property record and how your value was set, fix factual errors at any time, and holds the informal protest hearing that must come before any appeal.
If the assessor raises your fair cash value or taxable value, you get a Notice of Increase in Valuation (OTC Form 926), clearly marked with its mailing date. It is not a tax bill. Mailing dates vary by county, so check the date printed on your notice. If your value stayed the same or went down, you get no notice. From November 1, 2026, the notice must also print an 'Oklahoma taxpayer bill of rights' (SB 1579).
Look up your home on the Tulsa County Assessor website and check square footage, bathrooms, condition and features. Mistakes are the easiest wins. Use our record card checklist.
File OTC Form 974 with the Tulsa County Assessor within 30 calendar days of the mailing date on your notice, or by the first Monday in April if you got no notice. If the informal hearing does not fix it, file Form 976 with the Tulsa County Board of Equalization (through the county clerk) and the assessor within 15 days of the assessor's decision.
Sales of similar nearby homes before January 1 of the tax year (Tulsa County will not consider sales after January 1); A recent independent appraisal; Your purchase price and date if you bought in the last two years (Form 974 asks for this); Photos, repair estimates, or fire, storm or insurance reports showing damage or condition problems.
Plan on proving that the assessor's value is wrong and what the right value is. The law does not spell out a homeowner's burden at the county board in plain terms. When you file your protest, the law also asks you to file a form under 68 O.S. 2835; if you do not, the assessor's value is presumed correct in any appeal. In district court the case is heard anew, so bring your full evidence again.
Next step: District court of your county. File within 30 calendar days of the date the board of equalization's order was mailed (or the date it was delivered to you). You must also file a notice of appeal with the county clerk, who is the board's secretary. File an appeal in the district court of the county where the home is. The case is tried anew (de novo), on questions of value, law or both; the county assessor is the defendant and is represented by the district attorney. Court filing fees apply. Either side can then appeal to the Oklahoma Supreme Court, but only on issues raised in district court. Properties valued over $3 million go to the Court of Tax Review instead.
The official appeal form is OTC 974: County Assessor Informal Protest (2026).
Open Form OTC 974Enter the market value on your assessment notice and what you think the home would really sell for. We estimate the yearly saving if the board agrees with you.
Some states cap how fast the taxable value of a home can rise (California, Florida, Michigan and Texas homesteads, for example). If your taxable value is already held below market value by a cap, a lower market value may not lower this year's bill.
Fill in your details and download a written appeal statement as a PDF or Word file. Most boards also require their own appeal form: file the form and attach this letter and your evidence to it.
Tax Appeal Map is a free information site, not a law firm or appraiser. The letter is a template, not legal advice.
File a written protest with the county assessor within 30 calendar days of the mailing date printed on your Notice of Increase in Valuation. If you got no notice because your value did not rise, you can still protest, but only on or before the first Monday in April. Use OTC Form 974. If you miss the deadline, the assessor's value is final for that year. The whole process must normally finish by May 31, when county boards of equalization adjourn (some boards extend). Example: Tulsa County for 2026 took protests within 30 days of each notice's mailing date, or by Monday, April 6, 2026 for owners who got no notice; its board of equalization adjourns May 31 unless it votes to extend to June 30.
Start with the Tulsa County Assessor: file OTC Form 974 there within 30 days of your notice's mailing date; appeals of the assessor's decision go to the Tulsa County Board of Equalization, whose secretary is the county clerk.
Phone 918-596-5100. Website: assessor.tulsacounty.org.
No filing fee appears on the state protest or appeal forms. But if you skip your board of equalization hearing without telling them in advance, the county can charge you its preparation costs, and you must pay them before appealing to court.
Contact details change; call or check the office website before you visit.