State Question 847: What Oklahoma's Property Tax Vote Would Change

On 3 November 2026, Oklahoma voters decide on State Question 847, a proposed constitutional amendment that would tighten the annual caps on how fast a property's assessed valuation can rise, and change how senior property tax protections work. If it passes, the new arrangements would take effect for tax year 2027.

This is one of the few things on the ballot that would reach into almost every Oklahoma homeowner's annual bill. It is also one of the least well explained. This article sets out what the current caps are, what the measure would change, the arguments on each side, and what it does and does not mean for anybody thinking about selling.

How Oklahoma property valuation works now

Your property tax bill is not one number. It is the product of three separate things, and confusing them is why most homeowners cannot work out why their bill moved.

The three moving parts

• Fair cash value. What the county assessor concludes the property is worth. This is a valuation exercise carried out for tax purposes and it is not the same thing as market value.
• Assessment ratio. A percentage of that value which becomes the assessed value. Counties in Oklahoma apply a ratio within a range set by law, so two counties can treat identical properties differently.
• Millage. The rates set by the various local bodies that levy against your property, principally school districts, the county, and in some cases a city, a career technology district and a health department.

Your bill is the assessed value multiplied by the total millage, less any exemptions you qualify for. Which means a bill can rise because the valuation rose, or because the millage rose, or both. A cap on valuation growth does nothing about the second one, and that is the single most important thing to understand before forming a view on this measure.

A cap on valuation growth limits one of the two inputs to your bill. Millage is the other, and it is set locally rather than capped constitutionally.

The caps that exist today

Oklahoma already limits how fast the fair cash value used for taxation can rise year on year. Under the current arrangement, most property is subject to an annual cap of five percent, and property carrying a homestead exemption is subject to a cap of three percent.

That is why a homeowner who has been in the same house for twenty years often has a taxable valuation well below what the property would sell for. The cap has been compounding in their favour the whole time. It is also why a recent buyer and a long-term neighbour with near identical houses can receive very different bills.

What State Question 847 would change

The measure proposes two broad changes.

Lower growth caps

The annual valuation growth caps would be reduced. Reporting on the measure has described the general property cap moving from five percent to four percent, and the homestead cap moving from three percent to one and three quarter percent, with the changes applying from tax year 2027. Supporters have described the resulting homestead cap as the lowest in the country.

In practical terms, for a homeowner staying put, a lower cap means the taxable valuation drifts upward more slowly relative to what the property is actually worth. Over a decade that compounds meaningfully.

Senior protections tied to income

The measure would also change how certain senior property tax limits work by tying benefits to income levels rather than operating on the current basis.

Oklahoma currently offers a valuation freeze for qualifying homeowners aged 65 and over whose household income falls below a threshold. The proposal would restructure that, and supporters have argued a sliding scale prevents older homeowners on middle incomes from being exposed to full market valuation increases simply because they sit slightly above a hard income line.

The detail matters enormously for anybody currently relying on that freeze, and it is worth reading the actual measure rather than a summary if that is you.

The case supporters make

The argument in favour rests on predictability. A homeowner on a fixed income cannot control what an assessor concludes their house is worth, and in a period where property values have risen sharply, a valuation-driven bill increase arrives whether or not the household's income moved at all.

Lower caps mean smaller annual increases and a more predictable bill. Supporters have also framed the senior income tiering as fixing an all-or-nothing threshold, where a household slightly over the line loses the protection entirely.

There is also a broader argument about the relationship between an unrealised increase in a home's value and an immediate cash tax liability. A homeowner who has no intention of selling receives no money when their house appreciates, but does receive a larger bill.

The case opponents make

Property tax is the primary funding mechanism for local services in Oklahoma, principally schools, and also county government, roads and public safety. Reporting on the measure has noted that some counties are particularly dependent on it, with Oklahoma County described as having no county sales tax and therefore relying entirely on property tax.

Opponents argue that constraining valuation growth constrains that revenue, and that the shortfall has to come from somewhere: either reduced services, or millage increases, or a shift toward other taxes. If a lower valuation cap is met with a higher millage rate, the homeowner's bill may not fall at all while local budgeting becomes harder.

There is also an equity argument that cuts both ways. Caps benefit people who stay in one house for a long time and do nothing for people who move frequently or buy for the first time, because a sale generally resets the valuation. Over decades this can produce large disparities between neighbours in near identical houses.

What it means if you are thinking about selling

Less than people assume, and it is worth being precise about why.

Caps do not transfer with the house

The protection a long-term owner has accumulated is attached to their ownership rather than to the building. When a property sells, the valuation generally resets, and the buyer starts from the current fair cash value rather than inheriting the seller's capped figure.

This is why a buyer's tax bill on a house is frequently much higher than the bill the seller was paying, and why quoting your current tax figure to a prospective buyer can mislead them badly. If you are selling, expect a buyer's estimated bill to be calculated from the reset valuation rather than from your last statement.

Assessed value is not market value

Homeowners frequently price a house from the assessor's figure and are then confused when offers come in differently. The assessor's fair cash value is a mass valuation carried out for taxation purposes on its own basis, and it can be substantially above or below what a property would achieve in a sale. On a long-held house with a compounding cap, it is usually well below.

Price from sold comparables within half a mile in the last six months, matched for vintage and size. That is the only reliable basis, and it is what we cover in more depth in our guide on what your house is worth in Tulsa.

None of this changes what happens if you do not pay

Whatever the caps become, unpaid property tax remains attached to the property rather than to the person, and Oklahoma counties hold a sale for delinquencies that have run long enough. A measure about how fast valuations rise does nothing about arrears that already exist. If that describes your situation, the county treasurer is the call to make, and our page on selling a house with back taxes sets out how those are settled at closing.

What to do before November

1. Read your own tax statement properly. Find the fair cash value, the assessed value and the total millage. Most homeowners have never separated these and cannot say which one moved.
2. Check you have the exemptions you qualify for. The general homestead exemption is the most commonly missed, and additional exemptions exist for older homeowners on lower incomes, disabled veterans and surviving spouses. Most require a one-time application with the county assessor.
3. Read the actual ballot text. Summaries, including this one, compress. The measure as written is what you are voting on.
4. If you are relying on a senior valuation freeze, read the senior provisions specifically. The restructuring affects that group most directly.
5. Confirm the position closer to the date. Ballot measures are amended, challenged and occasionally removed. Check with the Oklahoma State Election Board rather than relying on anything published months earlier.

If you think your valuation is wrong now

Separately from anything on the ballot, Oklahoma has an existing process for protesting a valuation you believe is incorrect. It runs on a defined timetable each year, starting with an informal conversation with the county assessor's office and escalating to a formal appeal if that does not resolve it.

What tends to work is evidence rather than argument. Sold comparables for genuinely similar nearby properties, documentation of condition problems the assessor could not have known about, and errors in the recorded characteristics of the property such as square footage or bedroom count. That last one is more common than people expect, particularly where additions were built without permits.

Deadlines are strict and vary, so check with your county assessor for the current timetable rather than assuming.

The short version