How much is the gas tax in Vermont?

Vermont's total state tax on a gallon of gasoline is roughly 32.3 cents in 2025. It combines a 12.1-cent motor fuel excise, the Motor Fuel Transportation Infrastructure Assessment of about 2% of the average retail price, and a 1-cent petroleum cleanup fee. The federal excise of 18.4 cents per gallon is added on top at the pump.

Why does Vermont's gas tax change over time?

Part of Vermont's fuel tax — the Motor Fuel Transportation Infrastructure Assessment — is a percentage of the average retail price rather than a fixed cents-per-gallon amount. When gas prices rise, this component rises too, so the state's total per-gallon tax floats slightly from one quarter to the next.

Is diesel taxed differently than gasoline in Vermont?

Yes. Vermont's diesel tax structure differs slightly from gasoline, with a state total of roughly 32 cents per gallon in 2025. Federally, diesel is taxed at 24.4 cents per gallon versus 18.4 cents for gasoline. The calculator switches both the state and federal rate when you select diesel.

How is the per-mile fuel tax calculated?

When you use the annual-mileage method, the tool divides the combined per-gallon tax by your fuel economy (MPG) to show the tax cost per mile. For example, at a combined 50.7 cents per gallon and 26 MPG, you pay about 1.95 cents of fuel tax for every mile you drive.

Is the gas tax included in the price at the pump?

Yes. Both Vermont state fuel taxes and the federal excise are baked into the posted price per gallon at the pump — you do not pay them separately. This calculator simply isolates how many of those cents are tax so you can see your annual and per-mile contribution to road funding.

Vermont Gas Tax Calculator

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Every gallon you buy in Vermont carries both state and federal fuel tax baked into the pump price. This calculator separates those cents from the fuel itself and totals them across a year, using Vermont’s combined gasoline tax of about 32.3 cents per gallon plus the 18.4-cent federal excise — so you can see your real annual and per-mile road-tax contribution.

How it works

Vermont’s state gasoline tax is a stack of components:

Motor fuel excise — 12.1¢/gal.
Motor Fuel Transportation Infrastructure Assessment (MFTIA) — about 2% of the average retail price, which works out to roughly 6.9¢/gal at typical prices.
Petroleum cleanup fee — 1¢/gal.

Together these reach an effective ~32.3¢/gal state total, and the federal excise of 18.4¢/gal is added at the pump. The tool computes gallons from either your mileage and MPG (gallons = miles ÷ mpg) or your tank size and fill-ups (gallons = tank × fills), then multiplies by each rate.

Example and notes

Driving 12,000 miles a year in a car that gets 26 MPG burns about 462 gallons. At Vermont’s combined ~50.7¢/gal (state + federal), that is roughly $234 in fuel tax per year, or about 1.95¢ per mile.

Because the MFTIA floats with the average retail price, Vermont’s state total shifts slightly each quarter — this estimate uses a representative ~32.3¢/gal. Diesel uses its own state and federal rates. Confirm the current figures at tax.vermont.gov.