Property Taxes: Explaining Oklahoma’s Taxable Valuation Cap

Every year, Oklahoma homeowners receive a letter from the county assessor telling you how much the assessor thinks your home would sell for if someone bought it this year. Most of the time, that number has gone up from the year before. Sometimes it’s gone up a lot, especially in a hot real estate market where investors and other buyers are paying a premium for homes like yours. When comparable homes sell for more, that’s a signal to the assessor to raise your estimated market value too.

What if it goes up a lot? Say it goes up by 50%. Does that mean your property tax is also going up that much?

The short answer is no.

No matter how fast your home's market value climbs, the Oklahoma Constitution caps how much your taxable value can grow each year.

Here's how it works, and what it means for your bill.

How it works

Every year, the county assessor reviews your home and estimates what it would sell for. That's your market value. But your property taxes aren’t figured using market value. Your property taxes are calculated using taxable value. That’s a separate number that is influenced by the assessor’s market value estimate but moves independently , with limits that keep it growing slowly in those years when it does grow. That’s most years, but even real estate sales have the occasional down market.

Article 10, Section 8B of the Oklahoma Constitution says the taxable value on a homestead can only increase a maximum of 3% a year, even in a hot real estate market where the home's actual market value is climbing much faster.

Think of it like shifting your car into low gear to keep things from getting out of control while you're going down a steep hill. The market value is the hill. The 3% cap is the low gear.

Two Oklahoma homes

Here are two examples, both in the Oklahoma City metro.

Example 1: Oklahoma City. In 2018, the assessor said a home on the east side of Oklahoma City had a market value of about $237,000. In 2026, the market value had grown to about $366,000. That’s a 54% increase in what the assessor believes the house would sell for.

But the constitutional cap held the taxable value — the amount used to calculate property taxes — to about $300,000. That translates into roughly $1,000 less on this year's tax bill.

Example 2: Edmond. In 2018, the assessor estimated that a certain home in Edmond could sell for about $583,000. Today, the assessor's public tax data shows the market value at just over $1.1 million. (Wow! That’s definitely a hot real estate area!)

In spite of that growth, the taxable value used for property taxes is significantly less, at about $780,000. That’s roughly $320,000 below market value, thanks to the 3% constitutional cap. That means that family will pay about $4,000 less on this year’s property taxes.

See. That's what the cap does. In a hot market, your home value shoots up. But your tax bill inches up.

Frequently asked questions

What resets the cap?
The taxable value does reset to market value under certain circumstances. The primary reasons are a major addition to the home or the sale of the home. When a home sells, the assessor knows exactly how much the home is worth: the price the new owner paid. No estimate is required, so the taxable value starts fresh at the current market value, and the 3% cap begins again from there.

Does the 3% cap apply to all property, or just homes?
The 3% cap applies to homesteads (owner-occupied primary residences) and agricultural land. If you are fortunate enough to own other real property like a second home, rental property, commercial property, vacant land, etc., the constitutional cap for that taxable value is 5% a year.

Where is the cap in the Oklahoma Constitution?
Article 10, Section 8B of the Oklahoma Constitution. In 1996 the people passed State Question 676 and moved us to using taxable value. The initial year-over-year growth cap was 5% on all property. In 2012, Oklahoma voters passed State Question 758. This lowered the cap to 3% on homestead and agricultural property.

Does the cap mean my taxable value can never catch up to market value?
No. Taxable value is generally less than the estimated market value, but that’s not always true. The cap slows the climb, but it doesn’t stop it. If the real estate market stays flat, taxable value will eventually catch up. Think of Aesop’s fable about the tortoise and the hare. That 3% increase is slow, but it a real estate market where home prices aren’t growing, it does eventually catch up. Also, any time you sell or make major improvements, the taxable value immediately resets to current market value.

Who sets my home's market value each year?
Your county assessor, who looks at sales data for comparable homes near yours and judges whether your home would sell for a similar price. If so, that becomes your market value.

What can I do if I disagree with the market value estimate?
Every county has a process to challenge the assessment. Contact your county assessor's office for the deadlines and forms.