What is Alaska's gasoline tax rate?

Alaska has the lowest state gasoline tax in the United States, about 8.95 cents per gallon (a base motor-fuel tax plus a small per-gallon surcharge). For comparison, the national average state gas tax is roughly 30 cents per gallon, and some states exceed 50 cents.

Is there a federal gas tax too?

Yes. The federal gasoline excise tax is 18.4 cents per gallon nationwide and is the same in Alaska as everywhere else. Combined with Alaska's low state rate, total tax per gallon is around 27 cents — among the lowest combined burdens in the country.

How is the per-fill-up tax calculated?

Multiply the number of gallons you pump by the combined per-gallon tax rate. For a 14-gallon fill in Alaska, that is 14 x ($0.0895 + $0.184) = about $3.83 in total fuel tax, of which only about $1.25 is the Alaska state portion.

How do I estimate my annual gas tax?

Divide your annual miles by your vehicle's MPG to get gallons used per year, then multiply by the per-gallon tax rate. Driving 12,000 miles per year at 25 MPG burns 480 gallons, generating roughly $131 in combined state plus federal fuel tax.

Does Alaska tax diesel differently?

Yes, Alaska levies a separate rate on diesel (highway) fuel, and marine and aviation fuels have their own rates. This calculator focuses on gasoline; check the Alaska Department of Revenue for current diesel and special-fuel rates if needed.

Alaska Gas Tax Calculator

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The Alaska gas tax calculator shows how much fuel tax you actually pay, per fill-up and across a year. Alaska is notable for having the lowest state gasoline tax in the country, so most of what you pay at the pump in tax is the federal portion.

How it works

Fuel tax is a flat amount per gallon, not a percentage of price:

gallons taxed = (fill-up gallons)   OR   (annual miles / MPG)
state tax  = gallons x $0.0895  (Alaska — lowest in the US)
federal tax = gallons x $0.184
total tax  = state tax + federal tax

Because both rates are cents per gallon, the price of gas does not change the tax — only the number of gallons does.

Worked example

Driving 12,000 miles per year in a car that gets 25 MPG:

Gallons used: 12,000 / 25 = 480 gallons
Alaska state tax: 480 x $0.0895 = $42.96
Federal tax: 480 x $0.184 = $88.32
Total annual fuel tax: $131.28

A single 14-gallon fill-up carries about $3.83 in combined tax, of which only ~$1.25 is Alaska’s share.

Tips and notes

Lowest state rate. At ~8.95 cents, Alaska’s gas tax is roughly a third of the national average — a meaningful saving for high-mileage drivers.
Federal tax dominates. The 18.4-cent federal rate is more than double Alaska’s state rate, so most of your fuel tax is federal.
Diesel differs. This tool covers gasoline; diesel and marine/aviation fuels carry separate Alaska rates.
MPG drives the bill. Improving fuel economy is the only way to cut fuel tax for the same miles, since the rate is fixed per gallon.