
Idaho Natural Gas Laws and Incentives
State Laws and Regulations
Alternative Fuels Tax
The motor fuel tax rate of $0.25 per gallon does not apply to special fuels dispensed into a motor vehicle that uses gaseous special fuels and displays a valid gaseous special fuels permit. Special fuels include compressed and liquefied natural gas, liquefied petroleum gas, hydrogen, and fuel suitable for use in diesel engines. The state excise tax on special fuels, determined on a gasoline gallon equivalent basis, still applies. Alternatively, an annual fee in lieu of the excise tax may be collected on a vehicle powered by gaseous special fuels, according to the gross vehicle weight rating of the vehicle. State government agencies are entitled to a refund of any special fuels tax paid to the vendor from which the fuel was purchased. No refund of special fuels tax shall be paid on special fuels used by a registered motor vehicle while idling. Idling means a period of time greater than 15 minutes when the motor vehicle is stationary with the engine operating. (Reference Idaho Statutes 63-2401, 63-2402, 63-2423, and 63-2424)
Utilities/Private Incentives
Natural Gas Technical Assistance
Questar Gas offers technical assistance to customers wishing to convert vehicles to operate on compressed natural gas. The company provides financial analysis and fleet consulting services for alternative fuel use comparisons.

