South Dakota > Laws and Regulations
Propane Tax
For taxation purposes, liquefied petroleum gas (propane) used as a motor vehicle fuel must be converted to gasoline gallon equivalents (GGE) using the conversion factor of 4.24 pounds per gallon of liquid at 60 degrees Fahrenheit per GGE. Propane is taxed at a rate of $0.20 per GGE. (Reference South Dakota Statutes 10-47B-3 and 10-47B-4)