Utah diesel tax rate is 31.9¢ per gallon for 2026. Calculate your IFTA fuel tax for Utah routes and compare neighboring state rates.
Utah at 31.9¢/gal (variable, indexed to wholesale price) sits slightly above average. Salt Lake City is the Mountain West's largest freight market and logistics hub, with same-day reach to Las Vegas, Boise, and Denver. Utah's central position in the Intermountain West makes it a key distribution state for the region. The I-15 corridor is among the highest-truck-volume routes in the Mountain West.
I-15 (Las Vegas NV–Salt Lake City–Idaho Falls ID, primary north-south), I-80 (Reno NV–Salt Lake City–Cheyenne WY, primary east-west), I-70 (Grand Junction CO–Green River, scenic east connector), I-84 (Portland OR–Boise ID–Utah), US-6 (Price–Spanish Fork, coal country)
Nevada to the west (27.8¢) and Colorado (20.5¢) and Wyoming (24.0¢) to the east offer better rates for border fuel stops. Nevada is the most practical: I-15 southbound toward Las Vegas crosses into NV at Mesquite, NV where fuel is meaningfully cheaper. Idaho to the north (32.0¢) is nearly identical to Utah. The Wasatch Front (Salt Lake–Ogden–Provo) concentrates the state's freight activity.