How much is Oregon's gas tax?

Oregon's state gasoline excise tax is 40 cents per gallon. On top of that, the federal gasoline excise tax adds 18.4 cents per gallon, for a combined 58.4 cents of tax in every gallon of gas you buy in Oregon.

Are there local gas taxes in Oregon too?

Yes. Several Oregon cities and counties levy their own local fuel taxes on top of the state rate. This calculator uses the state plus federal base, so add your local rate if your city imposes one.

How is the per-mile gas tax found?

The tool divides your miles driven by your miles per gallon to get gallons burned, multiplies by the combined per-gallon tax, and divides by miles. Lower-MPG vehicles pay more gas tax per mile than efficient ones.

Do electric vehicles pay Oregon gas tax?

No. Electric vehicles buy no gasoline, so they pay no gas tax. Oregon instead funds road costs for EVs through higher registration fees or the optional OReGO per-mile road usage charge program.

Does Oregon have full-service gas stations?

Historically Oregon required attendants to pump gas, though the law was relaxed. That affects price at the pump but not the gas tax, which is a fixed per-gallon excise regardless of who pumps the fuel.

Oregon Gas Tax Calculator

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

Every gallon of gasoline you buy in Oregon includes both a state and a federal excise tax. Oregon’s 40-cent state rate is among the higher state gas taxes, and the federal government adds 18.4 cents. This calculator turns those per-gallon rates into the tax you pay per fill-up or over a whole year of driving.

How it works

The tool works in gallons, then applies the combined per-gallon rate:

combined rate = $0.40 Oregon + $0.184 federal = $0.584 per gallon
tank mode     = tank size (gal) x combined rate
annual mode   = (annual miles / MPG) x combined rate
per-mile tax  = combined rate / MPG

Tank mode shows the gas tax baked into one fill-up. Annual mode estimates your yearly gas-tax contribution from how far you drive and how efficient your car is.

Example

Driving 12,000 miles a year in a 25-MPG car burns 480 gallons. At 58.4 cents of combined tax per gallon, that is about 280 dollars of gas tax a year, or roughly 2.3 cents per mile. A 40-MPG car driving the same distance pays closer to 175 dollars.

Notes

This uses Oregon’s 40-cent state rate and the 18.4-cent federal rate. It does not include local city or county fuel taxes, diesel’s different rate, or sales-tax effects, since Oregon has no general sales tax. Confirm current rates at oregon.gov/odot and the FHWA before relying on the figures.