Recently, new legislation has been passed by the U.S. congress and signed by President Obama that adjusts the federal excise tax on liquefied natural gas (LNG) and propane used in vehicles. These changes are effective January 1, 2016. View the full text of Public Law 114-41, enacted July 31, 2015.
The following summary highlights the key aspects of the legislation that relate to alternative fuel excise tax changes to help you and your stakeholders understand the implications of this legislation. The Alternative Fuels Data Center Laws & Incentives website has been updated to reflect the changes.
H.R. 3236, Surface Transportation and Veterans Health Care Choice Improvement Act of 2015
- Enacted date: July 31, 2015; Public Law 114-41
- Relevant provision: Section 2008
- Notable changes:
- Adjusts the federal excise tax rates for propane and LNG used in vehicles so that, like compressed natural gas (CNG), the fuels are taxed on an energy equivalent basis rather than a volumetric basis.
- Establishes clear energy equivalencies for each fuel, as follows:
- One diesel gallon equivalent (DGE) is equal to 6.06 pounds of LNG
- One gasoline gallon equivalent (GGE) is equal to 5.75 pounds of propane and 5.66 pounds of CNG
- Effective date: January 1, 2016 (i.e., the amendments apply to any sale or use of these fuel types after December 31, 2015)
Summary of Current and Adjusted Excise Tax Rates
| Fuel Type | Current Excise Tax Rate (through Dec. 31, 2015) | New Tax Rate(effective Jan. 1, 2016) | Impact of Amendment |
| Propane | $0.183 per liquid gallon | $0.183 per GGE | Propane is taxed on an energy content basis that is equal to gasoline, rather than a volumetric gallon |
| LNG | $0.243 per liquid gallon | $0.243 per DGE | LNG is taxed on an energy content basis that is equal to diesel, rather than a volumetric gallon |
| CNG | $0.183 per GGE | $0.183 per GGE | No change from current tax rates |
