Natural Gas and Propane Fuel Tax

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Any individual using or selling compressed natural gas (CNG), liquefied natural gas (LNG), or liquefied petroleum gas (propane) as a motor fuel must report fuel use and remit taxes due to the Kansas Department of Revenue on a monthly basis. The minimum tax imposed on CNG is $0.24 per gasoline gallon equivalent (GGE), LNG is $0.26 per GGE, and propane is $0.23 per gallon. The state imposes a tax rate of $0.24 per gallon on conventional motor fuel.

Alternatively, CNG, LNG, and propane vehicle users may apply for special permit decals to pay motor fuel taxes on a mileage basis. The number of gallons used on Kansas highways is determined based on the following miles per gallon (mpg) estimates:

Gross Vehicle Weight Rating MPG
6,000 pounds (lbs.) or less 12 mpg
6,001 to12,000 lbs. 10 mpg
12,001 to 24,000 lbs. 7 mpg
24,001 to 42,000 lbs. 6 mpg
42,001 to 66,000 lbs. 4 mpg
Over 66,000 lbs. 3 mpg

(Reference Kansas Statutes 79-34,141; 79-3490; and 79-3491a through 79-3492e)