Oklahoma Gas Tax

Oklahoma charges a per-gallon excise of 19.0¢ on gasoline plus a 1¢ Petroleum Storage Underground Tank Release fee, which applies to gasoline, diesel, and ethanol blends and funds cleanup of leaking fuel tanks. Motor fuel is not subject to the state sales tax, and neither charge is indexed.

The excise last changed on July 1, 2018, when House Bill 1010xx raised it by 3¢, from 16¢ to 19¢, and raised the diesel tax by 6¢. It was the first increase since 1987. The bill was a revenue package passed to fund a teacher pay raise and also raised taxes on cigarettes and oil and gas production; a veto referendum was filed against it.

In the EIA’s July 2026 (revised August 2026) table, Oklahoma’s state taxes and fees total 20.0¢ a gallon, tied for the 5th-lowest of the 50 states and D.C., against a 51-jurisdiction average of 33.8¢. Only 4 jurisdictions rank below it. The state’s price history and its position against the national average are on the Oklahoma gas prices page.

Four of the six states on Oklahoma’s borders tax gasoline more heavily: Colorado at 30.2¢ a gallon, Missouri at 30.0¢, Kansas at 25.0¢ and Arkansas at 25.0¢. Texas matches Oklahoma exactly, and New Mexico, at 18.9¢, is the one neighbor with a lower rate.

The Kansas and Arkansas rates are within a cent of each other, so the step up from Oklahoma is about the same heading north on Interstate 35 toward Wichita as heading east on Interstate 40 toward Fort Smith. Along the Red River the step is zero, which leaves Oklahoma and Texas tied for the 5th-lowest. The New Mexico difference is small and applies only on the short border at the western end of the Panhandle. Missouri is the one neighbor that the EIA flags for local option fuel taxes.

Oklahoma’s own figure is an excise of 19.0¢ and a 1.0¢ fee for leaking-tank cleanup. With the federal 18.4¢, the combined state and federal rate is 38.4¢, and the state takes just over half of it. The 51-jurisdiction average is 33.8¢, so the Oklahoma rate is below it even after the 2018 increase.

Texas and Oklahoma each show 20.0¢ in the EIA's July 2026 table, a gap of 0.0¢. New Mexico, at 18.9¢ (EIA table, July 2026), is the only bordering state with a total under Oklahoma's, and Oklahoma sits 1.1¢ above it.

Colorado, at 30.2¢ (EIA table, July 2026), is the bordering state with the highest total, and Oklahoma's total is 10.2¢ below it. Missouri shows 30.0¢ (EIA table, July 2026), which puts Oklahoma 10.0¢ below Missouri. Kansas and Arkansas both show 25.0¢ (EIA table, July 2026), and Oklahoma is 5.0¢ below each. That makes 4 of 6 bordering states with a higher state total in the EIA's July 2026 table.

Across the 50 states and D.C. in that July 2026 table, the average state total is 33.8¢, and Oklahoma's 20.0¢ is 13.8¢ below it. Oklahoma is tied for 5th-lowest (EIA table, July 2026), with 4 jurisdictions lower and 45 higher. Alaska is at 9.0¢ (EIA table, July 2026) and California is at 73.6¢.

Within Oklahoma's 20.0¢ (EIA table, July 2026), excise is 19.0¢ and other state taxes and fees are 1.0¢, so excise is 95% of the state total. Adding the federal 18.4¢ gives 38.4¢ in the EIA's July 2026 table, and the state's part of that combined figure is 52%.

The EIA table shows no local option gasoline taxes for Oklahoma, and the EIA excludes county and local taxes from the totals it lists.