Utah Car Sales Tax & Emissions by County (2026)
In Utah, combined car sales tax runs ~6.65% to 8.45% by county, and emissions testing is required only on the Wasatch Front (five counties). The age-based uniform registration fee is the same statewide. Find your county below.
Rates verified July 2026 from the Utah State Tax Commission (typical at the county seat). Utah taxes by your registration address; resort towns exempt vehicles from the resort tax.
| County | Combined sales tax | Emissions? |
|---|---|---|
| Salt Lake | 8.45% | Yes |
| Utah | 7.45% | Yes |
| Davis | 7.25% | Yes |
| Weber | 7.25% | Yes |
| Cache | 7.3% | Yes |
| Washington | 6.75% | No |
| Tooele | 7% | No |
| Box Elder | 6.95% | No |
| Iron | 6.75% | No |
| Summit | 7.95% | No |
| Wasatch | 7.2% | No |
| Uintah | 6.95% | No |
| Sanpete | 6.65% | No |
| Carbon | 6.75% | No |
| Sevier | 7.05% | No |
Frequently asked questions
How much is car sales tax in Utah?
State sales tax is 4.85%, plus county and city taxes. Combined vehicle rates run from about 6.65% (Sanpete) to 8.45% (Salt Lake City), based on your registration address.
Which Utah counties require an emissions test?
Five Wasatch Front counties: Salt Lake, Utah, Davis, Weber, and Cache. Everywhere else in Utah, no emissions test is required. (Cache has a lighter schedule — vehicles under 6 years old aren't tested.)
What is the uniform fee on Utah registration?
An age-based fee charged in place of a property tax, the same statewide: $150 for the newest vehicles (under 3 years), stepping down to $110, $80, $50, and just $10 for vehicles 12+ years old.
Do resort towns like Park City charge extra vehicle tax?
No — vehicles are exempt from the resort-community tax, so in Park City (Summit) and Heber (Wasatch) the effective vehicle rate is lower than the posted retail sales-tax rate you'd see on other purchases.