Last checked Nov 10, 2026
Buying a car in Utah
The tax you will pay, whether your trade-in lowers it, what the dealer may charge for paperwork, and where to title and register. Taken from official Utah sources.
- State tax on vehicles
- 4.85%
- Trade-in lowers tax
- Yes
- Doc fee limit
- No cap
- Deadline to title or register
- Check with the state
Sales tax on a car in Utah
Utah charges a state sales tax of 4.85% on vehicle purchases.
Local sales taxes are added to the state rate and vary by location; a dealer sale uses the rate at the dealer's location and a private sale uses the buyer's registration address.
In a private sale the buyer pays the sales tax when titling the vehicle and must state the price actually paid. Sales between family members are not exempt.
Does a trade-in lower the tax?
A trade-in reduces the taxable amount when it is part of a single transaction between only two parties.
Example, state tax only. On a $30,000 car with a $10,000 trade-in, the taxable amount is $20,000, so the state tax is about $970. Without the trade-in it would be $1,455. Local taxes and fees are extra.
Dealer doc fees in Utah
Utah does not limit the amount of a dealer documentation fee. A dealer that charges one must list it separately from state-mandated fees and post a sign stating that the fee represents costs and profit to the dealer and is not set by the state.
The documentation fee is taxed along with the vehicle.
Whatever the rule, the fee is part of your out-the-door price. Ask for it in the written quote and negotiate the total, not the line. See dealer fees explained.
Title and registration
Titles and registrations are handled by the Utah Division of Motor Vehicles. A dealer selling to a Utah resident issues a 45-day temporary permit and has that time to obtain the registration and license plates.
Also worth knowing
- Utah law requires a seller to provide the title within 48 hours of the transaction.
- A buyer who underreports the purchase price in a private sale owes the unpaid tax, interest, and a penalty.
- A customer trading in a leased vehicle must first buy it and pay any tax due on that purchase to receive the trade-in credit.
Sources
- Utah State Tax Commission: Publication 5, Sales Tax Information for Vehicle and Watercraft Dealers (tax.utah.gov)
- Utah State Tax Commission: Combined Sales and Use Tax Rates, fourth quarter 2026 (files.tax.utah.gov)
- Utah Motor Vehicle Enforcement Division: Question and Answer Booklet (October 2024) (dmv.utah.gov)
- Utah DMV: Responsibilities of Buyer and Seller (dmv.utah.gov)
- Utah DMV: Temporary Permits (dmv.utah.gov)
Last checked Nov 10, 2026; next review by Feb 10, 2027. This page explains how the rules generally work and is not tax or legal advice. Rules change, so confirm with the state. Report an error.
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