Semi / Dry Van Cost Per Mile in South Dakota

Diesel fuel in South Dakota currently averages $4.97 per gallon, which includes a state fuel tax of 28.0¢ per gallon. This fuel tax is near the national average and should be factored into your semi / dry van rate calculations.

Average commercial semi / dry van insurance in South Dakota runs approximately $456/month. This moderate premium is typical for the region and should be reviewed annually to ensure you're not overpaying.

Semi trucks average 5.5–7.5 MPG, making fuel the largest single expense — typically 30–40% of total CPM. At these consumption rates, even a $0.20/gallon price difference between states changes your CPM by $0.03–$0.04/mile, which compounds to $300–$450/month at 11,500 miles.

South Dakota has no state income tax, benefiting owner-operators. The state's agricultural economy generates seasonal grain and livestock hauling demand. I-90 carries east-west freight, but load options thin out in rural areas.

Semi insurance premiums are the highest of any equipment class, reflecting the higher liability exposure and cargo values. Tire costs ($0.04–$0.06/mile), DEF fluid, and DPF maintenance add meaningful variable costs that lighter equipment classes don't face.