Short-Term Rental Commercial Tax: The 10% to 15.5% Jump

Mohave County, Arizona has spent roughly a year moving short-term rentals off the residential property tax rolls and onto the commercial ones. As of July 24, 2026, more than 900 of the county's roughly 3,500 short-term rentals had been reclassified, according to the Arizona Capitol Times, and by August 1 the Lake Havasu City paper put the figure at nearly 1,000 full-time vacation rentals. County Assessor Jeanne Kentch's position is that a house licensed, advertised online, and open to guests year round operates like a motel and should be assessed like one.

There was no council vote and no hearing a host could attend. An Arizona assessor can change a parcel's legal class administratively, using platform listings, city rental licenses, and advertising as evidence, as the Havasu News reported on July 29, 2026. The owner finds out from a notice of value, or from an escrow payment that climbs without explanation.

Two things are worth getting right before you budget for this. The assessment ratio nearly every article on the dispute prints is the wrong one for the current tax year. And the argument a reclassified owner takes to an appeal is a specific sentence in Arizona statute, not a general complaint about fairness.

Key facts

• Arizona statute sets the class one (commercial and industrial) assessment ratio on a declining schedule: 16% for 2025, 15.5% for tax year 2026, and 15% from and after December 31, 2026, per A.R.S. 42-15001.
• Class three (owner-occupied primary residence) and class four (residential rental) are both assessed at 10% of value, per the Arizona Department of Revenue's classification guide.
• Moving a parcel from class four to class one raises assessed value 55% in tax year 2026 (15.5 divided by 10) and 50% from 2027. At an unchanged district rate, the tax bill rises by the same percentage.
• As of July 24, 2026, more than 900 of Mohave County's roughly 3,500 short-term rentals had been moved to the commercial class, per the Arizona Capitol Times.
• A.R.S. 42-12004(A)(10) places in class four "real and personal property and improvements that are used for residential purposes and that are leased or rented to lodgers," excluding only owner-occupied primary residences and property used for commercial purposes.

What Mohave County changed, and who is exempt

The assessor published her own explanation of the policy on July 22, 2026. Year-round short-term rentals move to legal class one. Owner-occupied primary residences keep their residential class, as do seasonal and snowbird rentals and casitas on a parcel whose primary use is still residential. Owners who believe their parcel was classified wrong can file a Residential Affidavit of Property Class Change, available at the county's three assessor offices or on its website.

The form itself asks the owner to choose among owner occupied primary residence, owner occupied non-primary, commercial as defined by A.R.S. 42-12001, occupied by a qualified family member, rented long-term, and rented short-term, which it defines as stays under 30 consecutive days. Out-of-state owners must designate an Arizona statutory agent, and rental owners must update the information within ten days of a change.

The opposition is arguing law, not sentiment. Jonathan Wicks of Arizonans for Responsible Tourism and Tom Farley of the Responsible Tourism Coalition have both argued the policy conflicts with statute that already treats these properties as residential, and Jon Riches, vice president of litigation at the Goldwater Institute, has argued the county cannot start from the presumption that income-producing property is commercial. Goldwater warned the county in the summer of 2026 to reverse course or face litigation, and the assessor has said other Arizona assessors are watching.

The ratio in the coverage is wrong for 2026

Nearly every account of this dispute says the ratio goes "from 10% to 15%." That is the 2027 number.

A.R.S. 42-15001 sets the class one percentage at fifteen and one-half percent "beginning from and after December 31, 2025 through December 31, 2026," and fifteen percent only "beginning from and after December 31, 2026." For tax year 2026, the operative figure is 15.5%.

It gets looser than that. One local report printed a commercial ratio matching no year in the schedule, and the county treasurer's own explainer page lists commercial at 16.5%, not the 2026 figure either. When the ratio is the whole dispute, read the statute rather than the explainer.

The error is small in percentage points and real in dollars. On the worked example below, budgeting at 15% instead of 15.5% leaves you about $182 short for the year.

What it does to your bill: the actual math

Arizona bills property tax as limited property value times the assessment ratio, which gives assessed value, times the tax rate per $100 of assessed value. Mohave County's treasurer explains the formula and uses a sample combined rate of 9.076 per $100. Rates vary by tax area, so treat that as a placeholder and pull your own from your tax bill.

Take a rental with a limited property value of $400,000 and that 9.076 rate.

As class four residential rental, assessed value is $400,000 times 10%, or $40,000. The bill is $40,000 divided by 100, times 9.076, which is $3,630.40.

As class one for tax year 2026, assessed value is $400,000 times 15.5%, or $62,000. The bill is $62,000 divided by 100, times 9.076, which is $5,627.12.

The increase is $1,996.72 for the year, or $166.39 a month in escrow, exactly the ratio of 15.5 to 10. In tax year 2027, when class one steps down to 15%, the same parcel is assessed at $60,000, the bill is $5,445.60, and the increase narrows to $1,815.20.

The durable number is the multiplier, not the dollar figure: class four to class one costs 1.55x your property tax in 2026 and 1.50x from 2027, whatever your rate and value. An increase that size also changes your quarterly estimate, worth rechecking before the September 15 estimated tax deadline.

The statute that is the actual defense

A host arguing against reclassification does not need a policy argument. There is a sentence in the classification statute written for this exact property.

A.R.S. 42-12004(A)(10) places in class four "real and personal property and improvements that are used for residential purposes and that are leased or rented to lodgers." The paragraph carves out only two things: property the owner occupies as a primary residence (class three) and property used for commercial purposes (class one). Paragraph 6 separately assigns to class four "not more than eight rooms of residential property that are leased or rented to transient lodgers" by an owner who lives on the property.

The word "lodgers" is the point. A statute putting residentially used property rented to lodgers in the 10% class is hard to square with a policy that moves the same property into the 15.5% class. The county's answer is that year-round operation makes the use commercial, and A.R.S. 42-12001 does carry a catch-all for real property "devoted to any other commercial or industrial use." No Arizona court has resolved which reading wins.

The cross reference reclassified owners should ask about

Arizona's 2016 law, A.R.S. 9-500.39, stops Arizona cities from banning short-term rentals outright, and it is the backbone of the fight over local control headed for the 2027 ballot.

Read its definition, though. The statute defines the vacation rental or short-term rental it protects as a dwelling offered for transient use "if the accommodations are not classified for property taxation under section 42-12001." Section 42-12001 is class one, the commercial and industrial class.

Nobody has litigated what that means, so we will not tell you. Side by side, the statutes say this: the protection against city bans is written to attach to property not classified as class one, and Mohave County has been moving rentals into class one. If you own a reclassified parcel in an Arizona city with restrictive rules, put that cross reference to a local land use attorney before accepting the change quietly.

What to do this month

Start with your notice of value and find the legal class line. If it reads class one, the change already happened and your next bill reflects it.

File the Residential Affidavit of Property Class Change if your parcel fits an exemption: owner-occupied primary residence, seasonal or partial-year rental, or a casita on a residential parcel. Documentation is what carries an affidavit, so gather booking calendars showing owner use or vacancy, utility records, and a clear account of how the parcel is used.

If you rent seasonally, document it now rather than after the classification hardens. The county reads Airbnb and Vrbo listings, city licenses, and advertising, and a listing that stays live year round looks year round even when the property is not.

Then recompute your break-even. A $166 a month increase on one property is not a rounding error, and property tax is a fixed cost you cannot negotiate. What you keep per booking still moves. Hosts running a branded direct booking site pay no platform commission on those reservations, which helps when a cost like this lands mid-year.

If you are outside Arizona: two questions

Any state that assigns different assessment ratios to residential and commercial property has the same lever, and pulling it requires no legislation. Two questions tell you your exposure.

Does your state's classification statute name residential rental property, or rented lodging, as its own class with its own ratio? If so, you have a statutory argument rather than a policy complaint. And is the commercial ratio meaningfully higher than the residential one? If the two match, reclassification costs you nothing.

Montana hosts went through a version of this when a reclassification of second homes roughly doubled short-term rental property tax bills, and New York City owners got a comparable surprise when pied-a-terre surcharge notices went out by mail rather than by vote. The cost arrives administratively each time, and the clock to contest it starts on a notice most owners skim.

What to watch next

Watch for a filed complaint. A suit would put A.R.S. 42-12004(A)(10) in front of a judge, and the answer would bind more than one county. Watch the other Arizona assessors too, because an approach that survives a challenge in Mohave County spreads quickly when it requires nothing from the legislature.

And watch the ratio step down. On January 1, 2027, class one drops to 15% and the reclassification penalty narrows from 55% to 50%. That fixes nothing, but it changes the math on whether an appeal is worth the filing cost.

FAQ

Can my county tax my Airbnb as commercial property instead of a residence?

In states that use property classes with different assessment ratios, yes, and usually without a vote. Mohave County, Arizona has moved more than 900 short-term rentals to the commercial class since roughly mid-2025. Whether that is lawful is contested, and the Goldwater Institute has threatened litigation.

How much more property tax does an Arizona short-term rental pay if it is reclassified as commercial?

Assessed value goes from 10% of limited property value to 15.5% for tax year 2026, so the bill rises 55% at an unchanged tax rate. On a $400,000 limited property value at a 9.076 rate per $100 of assessed value, that is $3,630.40 rising to $5,627.12, an increase of $1,996.72 a year.

Is Arizona's commercial assessment ratio 15% or 15.5%?

It is 15.5% for tax year 2026. A.R.S. 42-15001 sets fifteen and one-half percent from and after December 31, 2025 through December 31, 2026, and fifteen percent only after that. Most coverage of the Mohave County dispute prints 15%, the 2027 figure.

Does reclassification affect anything besides my tax bill?

Possibly. A.R.S. 9-500.39, the law barring Arizona cities from prohibiting short-term rentals, defines the rentals it protects as accommodations "not classified for property taxation under section 42-12001," which is the commercial class. No court has addressed what that means for a reclassified parcel, so treat it as a question for a local land use attorney, not a settled answer.