How much is the gas tax in Wyoming?

Wyoming's state fuel tax is 24.0 cents per gallon on both gasoline and diesel. This includes a 23-cent excise tax plus a 1-cent license fee for the leaking underground storage tank (LUST) fund.

What is the total gas tax I pay at the pump in Wyoming?

On gasoline you pay the 24.0 cent Wyoming state tax plus the 18.4 cent federal excise, for a combined 42.4 cents per gallon. On diesel it is 24.0 cents state plus 24.4 cents federal, totaling 48.4 cents per gallon.

Does Wyoming have a local gas tax?

No. Wyoming's fuel tax is a single statewide rate with no city or county add-on. Every driver in the state pays the same 24 cents per gallon to fund roads and the LUST cleanup program.

How is the per-year fuel tax calculated?

The calculator estimates your annual gallons, either from tank size times fills per year or from annual mileage divided by your MPG. It then multiplies your gallons by the combined excise rate to show the state and federal tax you pay each year.

Is gas tax included in the price at the pump?

Yes. Both the state and federal excise taxes are already built into the per-gallon price you see at the pump. This calculator isolates the tax portion so you can see how much of each gallon goes to government.

Wyoming Gas Tax Calculator

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What you actually pay in Wyoming fuel taxes

Wyoming charges a flat 24.0 cents per gallon state fuel tax on both gasoline and diesel — a 23-cent excise plus a 1-cent leaking-underground-storage-tank (LUST) fee. There is no local add-on, so every driver pays the same rate. This tool shows how much of each gallon — and each year of driving — goes to fuel excise tax once you stack the state and federal rates together.

How it works

The combined per-gallon excise is the state rate plus the federal rate:

Gasoline: 24.0¢ state + 18.4¢ federal = 42.4¢/gal
Diesel: 24.0¢ state + 24.4¢ federal = 48.4¢/gal

To get your annual burden, the calculator estimates how many gallons you buy:

tank mode:    gallons/year = tank size × fills per year
mileage mode: gallons/year = annual miles ÷ MPG

Then it multiplies gallons by the combined rate and splits the result into the state and federal shares.

Notes and example

A driver covering 12,000 miles a year at 25 MPG uses about 480 gallons. On gasoline that is roughly 480 × $0.424 = $203.52 in combined fuel tax for the year, of which about $115 is the Wyoming portion. This is an estimate — actual mileage and MPG vary. Wyoming’s fuel tax is confirmed at dot.state.wy.us.