South Dakota diesel tax rate is 28.0¢ per gallon for 2026. Calculate your IFTA fuel tax for South Dakota routes and compare neighboring state rates.
Calculate Your South Dakota IFTA Tax
Gallons consumed in South Dakota→
Net taxable gallons→
South Dakota tax rate (2026)→28.0¢/gal
Estimated South Dakota IFTA→
Positive = amount owed to South Dakota; negative = credit on your return.
South Dakota IFTA Rates & Trucking Overview 2026
South Dakota at 28.0¢/gal is competitive in the Northern Plains, with no state income tax adding to its carrier-friendly profile. Sioux Falls is South Dakota's primary freight hub at I-90/I-29 and serves as a major distribution center for western Minnesota, southwestern Wisconsin, and northeastern Nebraska. The Mount Rushmore/Black Hills region in western SD generates tourism-related freight.
Minnesota to the east (28.5¢) and Nebraska to the south (27.7¢) are nearly identical to South Dakota's rate — no meaningful savings in either direction. Wyoming to the west (24.0¢) is better for I-90 westbound runs. North Dakota to the north (23.0¢) is similarly better for I-29 northbound runs. Agriculture (corn, soybeans, wheat, sunflowers) and livestock generate significant outbound freight.
South Dakota IFTA — Frequently Asked Questions
What is South Dakota's IFTA diesel tax rate in 2026?
South Dakota's diesel rate is 28.0¢/gal. Wyoming (24.0¢) and North Dakota (23.0¢) offer modest savings for western and northern border crossings. South Dakota has no state income tax, making it an attractive base state.
Who administers IFTA for South Dakota-based carriers?
South Dakota IFTA is administered by the Department of Revenue. File quarterly at dor.sd.gov. No state income tax and low fuel rates make SD a popular base state for Plains region carriers.
What freight moves through Sioux Falls?
Agricultural commodities (corn, soybeans, pork from SD's large hog industry), retail distribution (Sioux Falls serves as a regional DC hub), and healthcare freight for Sanford and Avera hospital systems. The I-29/I-90 interchange makes Sioux Falls a natural distribution center for the upper Midwest.
Are there considerations for I-90 in the Black Hills?
I-90 through Spearfish Canyon and the Black Hills has significant grades and curves. Commercial vehicles should check weather conditions at sd511.org during winter. The Sturgis Motorcycle Rally in August significantly impacts traffic on US-14A and surrounding routes for approximately two weeks.
Fueling tip: Wyoming at 24.0¢ saves 4¢/gal on I-90 westbound. North Dakota at 23.0¢ saves 5¢/gal on I-29 northbound. Nebraska and Minnesota are nearly the same rate — no significant savings at those borders.