Scottsdale draws investors for the same reason it draws guests: pools, golf, spring training and a long winter season when the rest of the country is cold. Many of those investors are high earners buying here specifically to run the short-term rental loophole with a cost segregation study.

This guide covers the tax side of that plan: where Scottsdale's booking pattern helps and where it hurts, how Arizona treats the depreciation, and what to keep. It does not cover Scottsdale's licensing, ordinance or lodging-tax rules. HostReady publishes those for the exact address, each one linked to its government source, and watches them for changes.

Does the STR loophole work in Scottsdale?

The strategy most buyers in Scottsdale are running rests on one number first: the average length of a guest stay. When the average period of customer use is seven days or less, the property is not a "rental activity" under the passive activity rules, so if you also materially participate, its losses can offset your wages and other active income (how the STR loophole works). Above seven days, the only way out of rental-activity treatment is an average of 30 days or less combined with significant personal services, which ordinary hosting rarely provides.

Scottsdale has a split personality that shows up in this test. Event weekends, golf trips and spring training produce short stays. Winter visitors from colder states often book for a month or more, and a handful of 30-night stays can drag a year's average well past seven days. If you take monthly winter bookings, run the average before you accept the next one, not after the year closes.

The second half is material participation. Most hosts rely on one of two tests: more than 100 hours in the year and not less than any other individual, or 500 hours on their own. The comparison in the 100-hour test is person by person, so a cleaner, handyman or manager who puts in more hours than you do on that property defeats it (the 100-hour test explained).

Many Scottsdale owners live out of state and hire a local manager or cleaning team, and a full-service manager will almost always log more hours than a remote owner. If that describes your setup, the 100-hour test is probably out of reach, and you should know that before you buy the study, not after. The hours you can count have limits too (what counts as participation).

Cost segregation and bonus depreciation in Arizona

The reason the loophole is worth pursuing is depreciation. A cost segregation study separates the furniture, fixtures, appliances and site work in a property from the building shell, and those shorter-lived components qualify for bonus depreciation. Under the One Big Beautiful Bill Act, 100% bonus depreciation is back for qualifying property acquired after January 19, 2025, so a large part of that reclassified basis can come off in the first year (what changed). The building itself is still depreciated over 27.5 or 39 years.

For individuals, Arizona's return adds back federal depreciation and then subtracts it again, recalculated with the full federal bonus for property placed in service after 2016. For a recent purchase the Arizona deduction therefore generally matches the federal one. Arizona updated its conformity to the federal code in 2026, and the older rules only matter for assets from before 2017. Your CPA handles the add-back and subtraction lines; the study and the asset detail behind them are what you need to keep.

Where you live matters too. Your home state generally taxes you on rental income wherever the property is, under its own depreciation rules, and credits some or all of the tax you pay to the state where the property sits (multi-state rental income).

Scottsdale costs worth recording

  • Pool and spa service, chemicals, heating and equipment repairs.
  • Cooling: summer electricity and HVAC servicing, which are heavier here than almost anywhere.
  • Desert landscaping and irrigation repairs.
  • Outdoor furniture and shade replaced on a faster cycle because of sun exposure. Furniture is depreciated or expensed; a permanent shade structure is a land improvement.
  • Guest amenities such as golf carts or bikes, depreciated if they last more than a year.

Permit, license and lodging-tax paperwork

Every obligation HostReady lists for Scottsdale comes with a paper trail, and some of it belongs in your tax records. License, permit, registration and inspection fees you pay to run the rental are ordinary business expenses. They are also the easiest deductions to lose, because they are paid once a year, in a government portal, often on a personal card.

Arizona rentals typically involve more than one registration, and each carries a fee and a renewal date. HostReady keeps the list and the expiry dates for your parcel; DeductFlow keeps what you paid for each and the receipt.

Lodging taxes are different. When a platform collects and remits them, they never pass through your hands. When you collect them yourself on direct bookings, that money is the guest's tax on its way to the government, so keep it separate from your rental income in your records and let your CPA decide how it appears on the return.

What to keep for a Scottsdale rental

None of this is decided by where the property is. It is decided by what you can show. For a Scottsdale property, that means:

  • Every booking with its dates, so the average stay can be calculated rather than asserted.
  • Your hours, logged as you work them, with the date, the task and the property, and a reasonable estimate of anyone else's hours on the same property.
  • Every trip to the property with its purpose, because a drive to fix a hot tub and a weekend away look the same on a credit card statement.
  • Receipts attached to the expense they support, including the license and permit fees above.
  • Booking lengths by month, so you can see a winter season of monthly stays pushing the average up while there is still time to change course.

DeductFlow keeps all of it together, property by property, so your CPA sees the records behind the strategy instead of a summary of it.