How much is the gas tax in New Jersey?

New Jersey's combined state tax on gasoline is roughly $0.449 per gallon as of 2025, made up of a base motor-fuel excise plus the Petroleum Products Gross Receipts Tax (PPGRT). The PPGRT rate is adjusted annually by the state to meet a revenue target, so the exact figure changes.

Why does New Jersey's gas tax change each year?

Under New Jersey's Transportation Trust Fund law, the PPGRT component is recalculated annually so total fuel-tax revenue hits a legislated target. If consumption falls, the per-gallon rate rises to compensate, which is why the rate moves up or down each October.

Is the diesel tax different from gasoline?

Yes. New Jersey taxes diesel at a slightly higher combined rate than gasoline, around $0.499 per gallon, and the federal diesel excise of $0.244 per gallon is higher than the $0.184 gasoline rate. Diesel drivers therefore pay more fuel tax per gallon.

Is the gas tax already in the pump price?

Yes. Both the New Jersey and federal fuel taxes are built into the price you see at the pump, so you do not pay them separately. This calculator simply isolates how much of your fuel spending is tax.

What is tax per mile?

Tax per mile is the combined per-gallon tax divided by your fuel economy. At about $0.633 per gallon combined and 25 miles per gallon, you pay roughly 2.5 cents of fuel tax for every mile you drive.

New Jersey Gas Tax Calculator

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A large share of what you spend at the pump in New Jersey is tax. This calculator separates the New Jersey and federal fuel taxes from the fuel itself, showing what you pay per year and per mile based on how much you drive.

How it works

The tool multiplies the gallons you buy by the per-gallon state and federal excise rates:

gallons (annual mode) = annual miles / miles per gallon
gallons (tank mode)   = tank size × fill-ups per year
state tax             = gallons × NJ per-gallon rate
federal tax           = gallons × federal per-gallon rate
total                 = state tax + federal tax
tax per mile          = (NJ rate + federal rate) / miles per gallon

New Jersey’s gasoline figure of about $0.449 per gallon combines a base motor-fuel excise with the Petroleum Products Gross Receipts Tax, which the state re-sets every year to hit a revenue target. Diesel runs higher, near $0.499 per gallon, and the federal excise adds $0.184 for gasoline or $0.244 for diesel.

Example and tips

Driving 12,000 miles a year in a car that gets 25 mpg, you burn about 480 gallons. At $0.449 of New Jersey tax plus $0.184 of federal tax, that is roughly $216 of state tax and $88 of federal tax, about $304 of fuel tax for the year — or roughly 2.5 cents per mile. Because the New Jersey rate is reset annually, check the current PPGRT rate if precision matters; the default here reflects the 2025 schedule.