Alternative Fuels Tax and Reporting

Alternative fuel dealers must sell liquefied natural gas (LNG) and propane used as motor fuel in diesel gallon equivalents (DGEs). For taxation purposes, LNG and propane must be reported as DGEs and are taxed at a rate of $0.545 per DGE. One DGE is equal to 6.06 pounds (lbs.) of LNG and 6.41 lbs. of propane. Alternative fuel dealers must sell compressed natural gas (CNG) used as motor fuel in gasoline gallon equivalents (GGEs). CNG must be reported in GGEs and is taxed at a rate of $0.470 GGE. One GGE is equal to 5.66 lbs. of CNG. The motor fuels tax increases annually on July 1 by an amount equal to the percentage increase of the United States Department of Labor’s Consumer Price Index for All Urban Consumers. For current tax rates, see the Illinois Motor Tax Rates and Fees website.

(Reference 35 Illinois Compiled Statutes 505/1.8 and 505/2)