Alternative Fuel Excise Tax

Propane and compressed natural gas (CNG) are subject to a federal excise tax of $0.183 per gasoline gallon equivalent (GGE). The liquefied natural gas (LNG) tax rate is $0.243 per diesel gallon equivalent (DGE). For taxation purposes, one GGE is equal to 5.75 pounds (lbs.) of propane and 5.66 lbs. of CNG. One DGE is equal to 6.06 lbs. of LNG. (Reference Public Law 114-41 and 26 U.S. Code 4041 and 4081)

Point of Contact
Excise Tax Branch
U.S. Internal Revenue Service Office of Chief Counsel
Phone: (202) 317-6855