South Carolina diesel tax rate is 28.0¢ per gallon for 2026. Calculate your IFTA fuel tax for South Carolina routes and compare neighboring state rates.
Calculate Your South Carolina IFTA Tax
Gallons consumed in South Carolina→
Net taxable gallons→
South Carolina tax rate (2026)→28.0¢/gal
Estimated South Carolina IFTA→
Positive = amount owed to South Carolina; negative = credit on your return.
South Carolina IFTA Rates & Trucking Overview 2026
South Carolina at 28.0¢/gal is one of the better fueling values in the Southeast — significantly cheaper than North Carolina (40.8¢) to the north and comparable to Georgia (34.2¢) to the south. Columbia is the state's freight hub at I-20/I-26/I-77. Charleston is one of the fastest-growing container ports in the US, ranking in the top 10 by TEU volume.
BMW's North American manufacturing plant in Spartanburg and Volvo's US plant in Berkeley County make South Carolina a significant automotive freight state. Boeing also operates a major 787 Dreamliner facility near Charleston. The Port of Charleston generates substantial drayage demand. North Carolina at 40.8¢ to the north means SC is the clear fueling choice for I-95 northbound drivers before crossing the border.
South Carolina IFTA — Frequently Asked Questions
What is South Carolina's IFTA diesel tax rate in 2026?
South Carolina's diesel rate is 28.0¢/gal — one of the Southeast's better values. North Carolina (40.8¢) and Georgia (34.2¢) are both more expensive, making SC a strategic fuel stop for I-95 corridor drivers.
Who administers IFTA for South Carolina-based carriers?
South Carolina IFTA is administered by the DMV. File quarterly at scdmvonline.com. Standard quarterly deadlines apply.
What makes Charleston a top-10 port?
The Port of Charleston benefits from deep-water berths (50+ feet after dredging), proximity to Southeast manufacturing, strong rail connections, and growing Midwest intermodal service via Norfolk Southern and CSX. BMW and other automotive manufacturers use Charleston for vehicle exports.
What is South Carolina's automotive freight profile?
BMW Spartanburg exports more vehicles than any other US plant — over 400,000 per year primarily through Charleston. Volvo's Berkeley County plant adds European brand exports. Michelin has multiple SC tire plants generating flatbed loads. The concentration of automotive manufacturing makes SC a strong flatbed and auto-transport market.
Fueling tip: North Carolina at 40.8¢ is 12.8¢ more expensive. Fill up in SC before heading north on I-95 or I-85. Georgia at 34.2¢ is also more expensive than SC — fuel here before heading south too.