
The tax on a car in Utah is a combination of a state tax and potentially additional local taxes. The state sales tax rate is 4.85%. However, the total rate you pay depends on where you register the vehicle, as local option taxes are added. The total sales tax rate typically ranges from 6% to 10% across the state. On top of the sales tax, you will also pay state and local fees, which are fixed amounts.
It's important to understand that in Utah, sales tax is calculated on the vehicle's purchase price before any manufacturer rebates are applied. This means the rebate amount is still subject to tax. For example, if you buy a car for $30,000 with a $2,000 rebate, tax is calculated on the full $30,000.
The table below shows the estimated total tax and fee costs for a $25,000 vehicle in some of Utah's most populous counties. These figures are estimates; always confirm with your local county clerk.
| County | Typical Total Sales Tax Rate | Estimated Sales Tax on $25k Car | State/County Fees (Approx.) | Total Estimated Cost |
|---|---|---|---|---|
| Salt Lake County | 7.75% | $1,937.50 | $150 | $2,087.50 |
| Utah County | 7.25% | $1,812.50 | $150 | $1,962.50 |
| Davis County | 7.35% | $1,837.50 | $150 | $1,987.50 |
| Weber County | 7.20% | $1,800.00 | $150 | $1,950.00 |
| Washington County | 6.75% | $1,687.50 | $150 | $1,837.50 |
The entire tax and fee payment is made directly to the Utah State Tax Commission when you register the vehicle at your local county office. Dealers often include this estimate in your financing, but you are responsible for paying it upon titling and registration.

Here's the bottom line: expect to pay around 7% to 10% of the car's price on top of the sticker price for tax and fees. The exact rate depends on your city. Remember, Utah taxes the price before any rebates are taken off, which can be a surprise. Just budget for that extra chunk of change when you're figuring out your final cost.

From my experience, the tax part always trips people up. The state rate is just the start; your city tacks on more. So you don't get shocked at the DMV, call your county clerk's office before you buy and ask for the total motor vehicle tax rate for your specific address. They'll give you the exact percentage. That way, you can multiply the car's selling price by that rate and know the exact number to expect.

I bought my truck last year, and the tax was higher than I thought. The salesman explained it like this: if the car is $20,000 and there's a $3,000 rebate, they tax the whole $20,000, not the $17,000 you actually pay. It felt weird, but that's the rule. My advice? When you're negotiating, do the math on the full price plus your local tax rate so your final number is realistic.

Financially, it's crucial to factor this into your total loan amount. If you're financing, the dealer will often collect an estimated tax and fee payment from you at signing and then handle the registration. This is convenient but means you're potentially paying interest on that tax amount over the life of the loan. For a better financial position, if you can pay the tax and fees separately with cash, you'll reduce the amount you need to finance and save on interest.


