Utah has no statewide short-term rental license; cities and counties license rentals, and state law stops them from using a listing alone as proof of a violation. Stays owe state sales tax plus state and local transient room taxes.

In Utah, a short-term rental (STR) is defined as a residential unit or any portion of a residential unit that is offered for occupancy for fewer than 30 consecutive days by either the owner of record or the lessee of the residential unit. For tax purposes, this definition is consistent, as short-term rentals in Utah are identified as reservations for less than 30 consecutive days.

The length of stay for short-term rentals in Utah varies depending on the location within the state. In general, short-term rentals refer to rentals for a period less than 30 days. However, the regulations can differ from one city to another within Utah. For instance, in Salt Lake City, there are specific rules and regulations that apply to short-term rentals, including building and housing standards, tourist and local taxes, and other requirements as set by the city, state, and county law.

If you're renting out an apartment, house, or other dwelling for such short-term periods and collecting payment from guests, you are generally responsible for collecting, filing, and remitting short-term rental tax to Utah tax authorities.

Before you can start collecting taxes on your rental, you must register with the Utah State Tax Commission to receive a state tax ID number. In Utah, you are not required to form an LLC for this registration.

The taxes that apply to short-term rentals in Utah include state sales tax and transient room tax. You may also be subject to local transient room tax, depending on your rental's location. These taxes are a percentage of your guest’s stay cost, added to their bill, which you are responsible for collecting and paying to the tax authorities.

It's important to note that tax rates can change frequently, so you should ensure you have the latest rates to avoid compliance issues. Also, different charges, such as pet fees or cleaning fees, may be taxable under Utah's lodging tax laws.

For short-term rental operators, filing tax returns with the Utah State Tax Commission is a regular obligation. The frequency of filing (monthly, quarterly, annually) and the specific due dates will be assigned when you register. Even if your property was not rented during a filing period, you are still required to file a tax return, often known as a “zero dollar return”.

Remember that local regulations may also apply to your rental, including aspects like legality, permits, licenses, zoning, and more. It's crucial to stay informed about both state and local laws to ensure full compliance.