Most car buyers in Utah focus on the price, the trade-in, and the monthly payment - and miss the third-largest number on the deal sheet: sales tax. On a $30,000 vehicle, sales tax can easily exceed $2,200. On a $50,000 truck, it can crack $4,000.
Here's exactly how Utah car sales tax works, the rates you should expect by county, and the one rule most private-party buyers don't know about. Before you sign, you might also want to read our guides on what your car is worth, how to trade in your car in Utah, and Utah auto financing.
Utah's base sales tax rate on vehicles
Utah charges a statewide base sales tax of 4.85 percent on vehicle purchases. That rate applies whether you're buying new or used, from a dealer or a private seller, gas or electric. But 4.85% is rarely what you actually pay. Counties and cities add their own local sales tax, and the combined rate typically lands between 6.1% and 8.7%.
- Lowest combined rate in Utah: Around 6.1% in some rural unincorporated areas.
- Highest combined rate: Up to 9.55% in certain municipalities.
- State average: Roughly 7.2%.
The rate is set by the address where you register the vehicle. If you buy from a Utah dealer, the dealer collects tax at the dealer's location rate; the DMV reconciles any difference if your home is elsewhere.
What sales tax looks like in the Wasatch Front
- Sandy, Utah: ~7.75%
- Salt Lake City: ~7.75%
- Draper: ~7.75%
- South Jordan: ~7.75%
- Layton (Davis County): ~7.25%
- Bountiful: ~7.35%
- Provo (Utah County): ~7.45%
- Orem: ~7.45%
- Ogden (Weber County): ~7.6%
- Park City: ~8.85% (highest in the area due to resort taxes)
How to calculate Utah sales tax on a car
(Purchase price − trade-in − rebates) × combined sales tax rate = sales tax owed
Three real examples at the 7.75% Sandy rate:
Example 1: New SUV, no trade. $35,000 × 0.0775 = $2,712.50
Example 2: Used truck with trade. Purchase $28,000, trade $12,000, taxable $16,000 × 0.0775 = $1,240 (saves $930 vs. no trade)
Example 3: New car with rebate. Purchase $32,000, rebate $2,500, trade $8,000, taxable $21,500 × 0.0775 = $1,666.25
The Utah trade-in tax credit, explained
This is the rule most private-party buyers don't realize exists. In Utah, when you trade a vehicle in at the same dealer where you're purchasing another vehicle, the trade-in value is subtracted from the purchase price before sales tax is calculated. You only pay sales tax on the net difference.
You're shopping for a $28,000 used truck. Your current car is worth ~$14,000.
Scenario A: Sell privately, then buy. $14,000 from private sale. Pay full sales tax on $28,000 = $2,170. Net out-of-pocket: $16,170.
Scenario B: Trade at the dealer. Dealer offers $13,000 trade-in. Taxable amount $28,000 − $13,000 = $15,000 × 0.0775 = $1,162.50. Net out-of-pocket: $16,162.50.
Trading at the dealer costs about the same as a private sale, with none of the work of advertising, screening buyers, or handling payment risk.
Conditions:
- Has to be a vehicle-for-vehicle trade, not "sell you my car, buy this one separately."
- Trade and purchase must happen in the same transaction at the same dealer.
- The credit applies only to state sales tax - it doesn't reduce title or registration fees.
Used cars, private-party sales, and the tax bill
Private-party used car sales in Utah are also subject to sales tax. The state collects at the DMV when you register.
- From a private seller: You pay sales tax at the DMV when you register. If you declare a suspiciously low price, the DMV may use a higher reference value.
- From a Utah dealer: The dealer collects and remits the tax. You'll see it on your buyer's order.
- From an out-of-state dealer: If they don't collect Utah tax, you'll pay at the Utah DMV at your home address rate.
- Family transfers (gift): Vehicles given to immediate family members may qualify for a reduced or waived tax. Check current Utah State Tax Commission guidance.
The takeaway for used buyers: there is no "way around" Utah sales tax. The only legal lever is the trade-in credit, available only through a dealer transaction.
Does Utah charge sales tax on electric vehicles?
Yes. Utah does not exempt EVs from sales tax. A $50,000 electric SUV gets taxed exactly the same as a $50,000 gas SUV. Where EV owners pay differently is in registration fees - Utah charges higher annual fees on electric and plug-in hybrid vehicles to offset gas-tax revenue.
Other line items you'll see at the dealer
- Title fee: $6 to $11.
- Registration fee: Typically $43 to over $200 per year, more for EVs.
- Uninsured motorist fee: ~$1.
- Dealer documentation fee: Set by the dealer, not the state. Typically $300 to $500.
How to estimate your total tax before you shop
- Find your combined rate on the Utah State Tax Commission website.
- Estimate the purchase price using KBB, Edmunds, or NADA.
- Estimate your trade value - expect a dealer's offer to come in 5-15% below "private party value."
- Calculate taxable amount. Purchase price − trade-in − rebates.
- Multiply. Taxable amount × combined rate.
- Add fixed fees. Title, registration, doc fee.
- Compare to your budget.
If you're financing, sales tax typically gets rolled into the loan, meaning you'll pay interest on it. Putting cash down for the sales tax portion instead of letting it ride at 7-8% APR can save real money over the loan's life.
Bottom line for Utah car buyers
- Plan on roughly 7.5% of the taxable purchase price in the Salt Lake metro area.
- Trading at the dealer reduces your taxable amount, often saving $500 to $2,500.
- Private-party sales aren't tax-free. The state collects at the DMV.
If you're shopping at our auto mall in Sandy and want a clear, no-surprises drive-out number before you commit, ask any of our team to run the full math. For details on what happens after the sale, see our guide on getting plates and registration in Utah.
Current rates and calculators are at tax.utah.gov.
