Travis Bunn
Founder, AppealDesk · Published March 1, 2026
How Much Can Property Taxes Increase in Wyoming? 2026 Complete Guide
Updated July 2026
Quick Answer
Wyoming caps residential property tax increases at 4% per year. That is new. House Bill 45, passed in 2024, exempts any increase in residential assessed value above 4% over the prior year, and it applies to residential structures and residential land. Older guides that say Wyoming has no cap are describing the law as it stood before 2024.
- Annual increase limit: 4% year over year on residential value (HB 45, 2024), currently the subject of a court challenge
- Homeowner exemption: 25% of fair market value on the first $1,000,000 for owner-occupied single-family homes (SF 69, 2025)
- Senior long-term exemption: 50% of assessed value for qualifying owners age 65+ (HB 3, 2024), not stackable with the 25% exemption
- Appeal deadline: 30 days from the date on your Notice of Assessment, filed with the county assessor
None of these programs check whether your assessed value is correct in the first place. That is what an appeal does.
Most homeowners never challenge their assessment, usually because nobody tells them they can or shows them how. That gap is the whole reason AppealDesk exists: see what your county has your home on record at, free, and if the number looks wrong we build the case for $49.
Wyoming's 4% Property Tax Cap (HB 45)
Before 2024, Wyoming was one of the states with no brake at all on residential value growth. Assessors revalue property every year at fair market value, and whatever the market did, your assessment followed. In fast-appreciating parts of the state that produced tax bills that moved faster than household budgets did.
House Bill 45, enacted in the 2024 session, changed that. The mechanism is an exemption rather than a freeze: any amount of assessed-value increase above 4% over the prior year's value is exempted from taxation. The practical effect is that the taxable value used for your residential structure and the residential land under it cannot climb more than 4% in a single year, even when the underlying market value jumps far more.
It helps to see the arithmetic. Wyoming has long assessed residential property at 9.5% of fair market value, so a home the assessor values at $300,000 carries an assessed value of $28,500. If the market pushes that home to $360,000 the following year, the raw assessed value would be $34,200, an increase of $5,700. Under the 4% cap, the taxable assessed value instead lands at $29,640, and the $4,560 difference is exempted. Confirm the current ratio on your own notice, since the 2024 constitutional amendment restructured how residential property is classified and county practice is the place to verify what applies to your parcel.
That 2024 constitutional change matters on its own. Voters approved Amendment A, which separated residential real property into its own tax class and authorized a subclass specifically for owner-occupied primary residences. It is the structural permission slip that lets the legislature treat the home you live in differently from other property, and the exemptions described below sit on top of it.
Do Property Taxes Go Up Every Year in Wyoming?
They can, because Wyoming reassesses annually rather than on a multi-year cycle. There is no year in which your value is simply carried forward untouched. What the 4% cap changes is the ceiling, not the frequency: in a rising market you should expect the taxable value to step up close to the cap each year rather than sitting still.
Your actual bill is the taxable assessed value multiplied by the total mill levy for your taxing districts, minus whatever exemptions you qualify for. Levies are governed by constitutional and statutory mill limits, but the cap on your value is the protection homeowners can actually count on and point to. If your bill rose sharply and your value did not, the change came from the levy side, which is decided in county and district budget processes rather than in the assessor's office.
What the 4% Cap Does Not Do
A cap is a growth limiter, not an accuracy check. It measures this year's value against last year's value and trims the difference. It never asks whether last year's value was right. If the assessor had your square footage wrong, counted a finished basement that is not finished, or leaned on neighborhood sales that do not resemble your home, the cap simply protects that mistake and lets it grow 4% a year forever.
The same blind spot applies to the exemptions. A 25% exemption on an inflated value still leaves you paying tax on 75% of a number that was too high to begin with. The percentage relief is real, but it is applied on top of whatever the assessor decided, and the only way to move that base number is to challenge it.
Caps and rate limits only control how fast your bill can grow. Nothing in them checks whether the number underneath is right. Assessors in Wyoming set values with mass-appraisal models that price thousands of homes at once, and nobody reviews yours unless you challenge it.
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Wyoming 25% Homeowner Property Tax Exemption (SF 69): How to Apply
Senate File 69, signed on March 4, 2025, exempts 25% of fair market value on the first $1,000,000 of value for single-family residential structures and the improved land associated with them. On a $300,000 home, that removes $75,000 from the value the tax is figured on, leaving $225,000. At the 9.5% assessment ratio that is an assessed value of $21,375 instead of $28,500.
The paperwork is where homeowners get caught. For the first year the exemption applied fairly broadly, but starting with tax year 2026 it requires an owner-occupancy affidavit filed with your county assessor confirming that you live in the home at least eight months of the year, with an exception for active-duty military. The application deadline for 2026 was March 1, 2026, and the governor signed emergency administrative rules in February 2026 to get the process running. If you are not sure whether your affidavit was filed and accepted, call your county assessor and ask directly rather than assuming the exemption carried over.
Long-Term Homeowner Exemption for Seniors 65+ (50% Off Assessed Value)
House Bill 3, also from the 2024 session, created a much larger exemption for long-tenured older homeowners: 50% of the assessed value of a primary residence for owners who are at least 65, have paid Wyoming property taxes for at least 25 years, and occupy the home at least eight months a year. It took effect January 1, 2025 and is scheduled to sunset July 1, 2027. A bill in the 2026 session to make it permanent passed the Senate, but final enactment is not confirmed, so treat the 2027 sunset as the operating assumption until your county assessor tells you otherwise.
You cannot stack this one with the 25% exemption on the same property in the same year. For a qualifying senior the 50% assessed-value exemption is generally the larger benefit, but the comparison depends on your value, so ask the assessor to run both before you choose.
| Program | What it does | Who qualifies | Watch out for |
|---|---|---|---|
| HB 45 (2024) 4% cap | Exempts assessed-value growth above 4% over the prior year | Residential structures and residential land | Under active litigation; still in effect for 2026 |
| SF 69 (2025) 25% exemption | Exempts 25% of fair market value on the first $1,000,000 | Owner-occupied single-family homes plus improved land | Requires an occupancy affidavit for 2026; deadline was March 1, 2026 |
| HB 3 (2024) long-term exemption | Exempts 50% of assessed value on the primary residence | Age 65+, 25+ years paying Wyoming property tax, 8+ months occupancy | Sunsets July 1, 2027; cannot be combined with SF 69 |
Is Wyoming's 4% Tax Cap Going Away? The Court Challenge Explained
The cap is being challenged in court over the valuation disparities it creates. Because the exemption is measured against each property's own prior-year value, homes that appreciated at very different rates end up carrying very different effective burdens, and that unevenness is the heart of the dispute.
For now the cap remains in effect, with the State Board of Equalization certifying adjusted values while the case is pending. What that means for you as a homeowner is straightforward: claim the relief you are entitled to this year, but do not build a long-term plan around the cap surviving unchanged. It is a live legal question, not settled ground, and your county assessor is the right place to confirm how the current year's values were certified.
- Wyoming4% a year
- California2% a year
- Florida3% homestead
- Texas10% homestead
HB 45 limits the taxable assessed value of a residential structure and its land to a 4% annual increase.
A cap limits how fast the number grows. It does not check whether the number was right to begin with.
What you can do about it
How to Appeal Your Wyoming Assessment (30-Day Deadline)
Wyoming gives you 30 days from the date printed on your annual Notice of Assessment to file a written appeal with your county assessor, under W.S. 39-13-109(b)(i). The deadline is strict and cannot be extended. It runs from the notice date, not from the day the envelope reached your mailbox, so open assessment mail the day it arrives and write the deadline on the calendar before you do anything else.
Your appeal is heard by the County Board of Equalization. If that board rules against you, its decision can be appealed to the State Board of Equalization within 30 days of the decision. The argument that wins at the county level is almost always the same one: comparable sales showing that homes genuinely like yours sold for less than the value the assessor assigned, plus documentation of any condition problem or record error that the mass-appraisal model could not see.
Because Wyoming reassesses every year, a missed deadline is not permanent, but it is expensive. An inflated base value that goes unchallenged becomes the number the 4% cap grows from next year, and the year after that.
A real AppealDesk order, Denver County, Colorado
In May 2026, a homeowner in Denver County, Colorado ran the check. The county had their home on record at $2,387,100, while recorded sales of comparable homes supported about $1,600,198: an over-assessment of $786,902, worth roughly $4,244 per year if corrected. Their packet laid out the comparable sales, the forms, and the filing steps. Nobody at the county was ever going to run that check for them.
Growth limits only help if the number they grow from is fair. If your assessment jumped after a purchase, new construction, or a revaluation, that new number is the one nobody has reviewed. Checking it is free and takes about a minute.
Check the number your bill is figured from
Enter your address to pull your county record free. If it looks too high, your $49 packet gives you everything to challenge it.
Frequently Asked Questions
How much can my Wyoming property taxes increase this year?
On the value side, the taxable assessed value of your residential structure and land is limited to a 4% increase over the prior year under HB 45. Your total bill can still move by more than that if mill levies in your taxing districts change or if an exemption you claimed last year no longer applies to you.
Does the 4% cap apply to a home I just bought or just built?
The cap is written as an exemption for growth above 4% over the prior year's value, which means it needs a prior-year value to measure against. How that works for newly constructed property or a parcel whose character changed is an administration question your county assessor answers for your specific parcel, so ask before assuming you are covered.
Can I claim both the 25% exemption and the senior long-term exemption?
No. The SF 69 25% exemption and the HB 3 long-term homeowner exemption cannot be applied to the same property in the same year. Qualifying seniors should compare the two with the assessor and take whichever produces the lower taxable value.
I missed the March 1 affidavit deadline. What now?
Contact your county assessor. The 2026 filing deadline for the owner-occupancy affidavit was March 1, 2026, and the administrative rules were adopted on an emergency basis, so counties are the only reliable source on late filings and on what you need to do to be positioned for the next tax year.
If Wyoming already caps increases, is appealing still worth it?
Yes, and arguably more than before. The cap freezes the relationship between this year and last year, so an assessment that is too high stays too high and compounds. An appeal is the only process that resets the base number itself.
Related Resources
If you are ready to act on a value that looks wrong, start with How to Appeal Property Taxes in Wyoming for the county-level procedure. If you are still weighing whether it is worth the effort, Is It Worth Appealing Property Taxes? walks through the math. And before you file, read What Evidence Do I Need for an Appeal?, because comparable sales are what county boards actually respond to.
This article provides general information about Wyoming property tax law as of July 2026, including HB 45 (2024), HB 3 (2024), and SF 69 (2025). The 4% cap is subject to pending litigation and tax law changes frequently. Confirm current rules, ratios, and deadlines with your county assessor or a tax professional before acting.