S.D. Codified Laws § 32-5-5
Vehicle license fees provided by this chapter are based, except as otherwise specifically provided, upon manufacturers' weights, including accessories. If a noncommercial motor vehicle is an automobile, pickup truck, or van with a manufacturer's shipping weight, including accessories, of ten thousand pounds or less, the license fees for such a motor vehicle shall be as provided by § 32-5-6. However, if the noncommercial motor vehicle is a pickup truck that weighs more than six thousand pounds, the owner has the choice of paying the license fees pursuant to § 32-5-6 or paying the license fees based on the gross weight of the motor vehicle as provided in § 32-5-6.3. The license fees for a noncommercial motor home are as provided by § 32-5-6.1. The license fees for a motorcycle are as provided by § 32-5-9. The license fees for a snowmobile are as provided by § 32-5-9.1. The license fees for any other noncommercial motor vehicle are based on the gross weight of the motor vehicle and are as provided in § 32-5-6.3. If the department determines the actual dry weight of any model vehicle with accessories to be at variance with the manufacturers' shipping weight, the department shall certify the correct weight to be used in determining fees. These fees shall be assessed and paid annually. Upon initial registration of a vehicle, the fees shall be assessed based upon the date of sale.
SDCL 32-5-5