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Wyoming was the worst state we checked.
An appeal cannot realistically help most owners here. A compounding 4 percent cap on annual increases, comparable sales that are criminally confidential, and a small enough population that none of it would be worth solving.
So Wyoming decides these on market value, which means the evidence is recent sales of genuinely comparable homes. What really matters is whether that whole set of sales sits below your assessed value. If they bracket your assessment instead of falling under it, boards usually side with the assessor, because nothing's been clearly disproved.
Now a few things lose almost everywhere. Comparing your assessment to a neighbor's assessment usually doesn't count where the argument's market value. One sale on its own can pretty easily be dismissed as an outlier. And the size of your increase, or the size of your bill, isn't really evidence about what your home's worth.
Deadlines here are set locally rather than by one statewide date, so the one that binds you is printed on your own assessment notice.
And that notice is really the thing to go find today, honestly. It's what starts your clock, it's usually a much shorter window than people expect, and there's no getting it back once it's gone.
First, look up your own record. Your county assessor mails an assessment schedule each spring, and their website shows your home's record. Wyoming caps yearly increases on homes at 4 percent, and that cap's being challenged in court in 2026, so it's worth checking it's applied to yours.
Next, know where to file. You've got 30 days from the date your assessment schedule was mailed to file your appeal with the county. The County Board of Equalization, which is your county commissioners, hears it. Before the hearing, you and the assessor have to swap evidence at least 30 days ahead, and you can ask for the sales the assessor used.
Then bring the evidence that wins here. Wyoming keeps sale prices private, but you can ask the assessor for the sales they relied on. Honestly, because of the cap, most homes are already taxed below market, so an appeal usually only helps recent buyers.
Also, check your exemptions. The state's property tax refund program gives money back to homeowners under the income limit, and you'll apply with the Department of Revenue. Check with your county assessor too, because the legislature's added new breaks for long-time homeowners.
Honestly, probably nothing. We'd rather tell you that than sell you a packet that can't work. If you want to be certain, pull your own assessment notice and look at whether the value you're taxed on is anywhere close to what your home would actually sell for. Where the two are far apart because of a cap, an appeal on the market value doesn't reach your bill.
But if the rules in Wyoming change we'll notice, because we re-screen the states we've turned down.
Here's the check you can run yourself in about five minutes, and it works anywhere. Pull your assessment notice and find two numbers on it. One is the market value the assessor believes your home is worth. The other is the value your tax bill is actually calculated on. In a state with a cap, those two drift apart over the years, and that gap is exactly why an appeal against the first number never reaches the second one.
If the two numbers are the same, or close to it, then a cap is not your problem and our answer here may be wrong for your situation. Please write and tell us if so, because we would rather fix a page than keep telling somebody the wrong thing.
We've screened all fifty states and DC on the same two questions. Does winning a lower market value actually lower your bill, or is there a cap sitting in between? And can you even put the evidence together from public records?
This comes from our own fifty-state screen, where we checked each state's cap, whether sale prices are public, whether there's an argument based on assessed values, and how many appeals actually get filed. Where we've quoted an appeal count, it's from the state or county that published it. If you spot an error, please write to hello@propertytaxbuddy.com and we'll correct it and say what changed.