Search Federal and State Laws and Incentives

Alternative Fuel Vehicle (AFV) Tax and Fee

Compressed natural gas (CNG) used in motor vehicles is subject to a state motor fuel tax of $0.13 per gasoline gallon equivalent (GGE). Liquefied natural gas (LNG) is also subject to a state motor fuel tax rate of $0.13 per diesel gallon equivalent (DGE).

In lieu of the motor fuel tax, some AFV owners are subject to a motor vehicle fee. An annual flat fee applies to passenger automobiles, pickup trucks, vans and heavy-duty vehicles using propane, natural gas, methanol, or blends of 85% methanol and 15% gasoline (M85). Propane and natural gas vehicles with a payload capacity of less than 2,000 pounds (lbs.) are taxed at a rate of $50 per vehicle per year. Methanol and M85 vehicles with a payload capacity of less than 2,000 lbs. are taxed at a rate of $100 per vehicle per year. Propane, methanol, and M85 vehicles with a payload capacity greater than 2,000 lbs. are taxed at a rate of $150 per vehicle per year. If the owner acquires the vehicle or converts it to run on the alternative fuel after July 1 of the tax year, the flat fee is half of the above-mentioned amount. AFVs must display a decal that the Oklahoma Tax Commission issues on an annual basis.

(Reference Oklahoma Statutes 68-500.4 and 68-723)

Natural Gas Measurement

The Oklahoma Department of Labor (DOL) must standardize compressed natural gas (CNG) and liquefied natural gas (LNG) measurements for retail motor vehicle fuel, unless the National Conference on Weights and Measures has established equivalent measures. Until the DOL standardizes measurements, a gasoline gallon equivalent is equal to 5.66 pounds (lbs.) of CNG and a diesel gallon equivalent is equal to 6.06 lbs. of LNG. (Reference Oklahoma Statutes 83-119)

Electric Vehicle (EV) Charging Station Tax

Beginning January 1, 2024, public EV charging stations are subject to a tax of $0.03 per kilowatt-hour. The tax does not apply to EV charging stations at private residences. Tax revenue will be apportioned to the Driving on Road Infrastructure with Vehicles of Electricity (DRIVE) Revolving Fund. Oklahoma residents may apply EV charging station tax payments as income tax credits and may be carried forward for up to five years.

(Reference Oklahoma Statutes 68-6501 through 68-6510)

Electric Vehicle (EV) and Plug-In Hybrid Electric Vehicle (PHEV) Fee

EV owners must pay an annual vehicle registration fee in addition to standard vehicle registration fees. Fee amounts vary depending on the gross vehicle weight rating (GVWR) of the vehicle:

The revenue from the annual fee will be apportioned to the Driving on Road Infrastructure with Vehicles of Electricity (DRIVE) Revolving Fund.

(Reference Oklahoma Statutes 68-6511)