Massachusetts Gas Tax Calculator

2026

Massachusetts charges 27.56¢ a gallon in state tax on gasoline and 27.56¢ on diesel in 2026, on top of the federal 18.4¢ and 24.4¢: 45.96¢ and 51.96¢ a gallon in all. Estimate your fuel costs.

By Konstantin Iakovlev · Updated October 19, 2026 · Methodology

miles
MPG
$/gal
Trip Type

Fuel Needed

1.0 gal

Trip Cost

$4.33

Annual Cost

$1,125.80

Fuel Cost Breakdown

Total Distance30.0 miles
Fuel Needed1.00 gallons
One-Way Cost$4.33
Trip Cost$4.33
Weekly Cost$21.65
Monthly Cost$93.82
Annual Cost$1,125.80

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

Massachusetts Gas Tax Overview

Massachusetts’s state tax on gasoline is 27.56¢ a gallon and 27.56¢ on diesel, the rate in force since January 1, 2026. That is the 32nd-highest state gasoline tax of the 50 states and DC. Excise fixed at 24¢ since 2013; the tank delivery fee is adjusted for inflation each January 1.

With the federal 18.4¢, a gallon of gasoline carries 45.96¢ of per-gallon tax, so a 15-gallon fill-up includes about $6.89 of fuel tax whatever the pump price.

The rate is due to be reset on January 1, 2027; the new figure is not published yet.

Massachusetts Fuel Taxes (2026)

State Gasoline Tax 27.56¢/gal
State Diesel Tax 27.56¢/gal
Federal Excise Tax 18.4¢ gasoline / 24.4¢ diesel
Total per Gallon 45.96¢ gasoline / 51.96¢ diesel
How the State Rate Is Built Gasoline and diesel: 24¢ excise + 3.439¢ underground storage tank delivery fee + 0.119¢ oil-spill fee.
Next Change January 1, 2027: new rate not yet published

Official Sources:

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