New Hampshire Gas Tax Calculator

2026

New Hampshire charges 23.75¢ a gallon in state tax on gasoline and 23.75¢ on diesel in 2026, on top of the federal 18.4¢ and 24.4¢: 42.15¢ and 48.15¢ 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.

New Hampshire Gas Tax Overview

New Hampshire’s state tax on gasoline is 23.75¢ a gallon and 23.75¢ on diesel, the rate in force since January 1, 2026. That is the 42nd-highest state gasoline tax of the 50 states and DC. No recurring adjustment (the road toll was inflation-adjusted once, in 2014); the import fee can pause when its funds exceed $5 million.

With the federal 18.4¢, a gallon of gasoline carries 42.15¢ of per-gallon tax, so a 15-gallon fill-up includes about $6.32 of fuel tax whatever the pump price.

New Hampshire Fuel Taxes (2026)

State Gasoline Tax 23.75¢/gal
State Diesel Tax 23.75¢/gal
Federal Excise Tax 18.4¢ gasoline / 24.4¢ diesel
Total per Gallon 42.15¢ gasoline / 48.15¢ diesel
How the State Rate Is Built Gasoline and diesel: 22.2¢ road toll (since July 1, 2014) + 1.546¢ oil import fee for oil cleanup funds (since January 1, 2026, down from 1.625¢).

Official Sources:

Other New Hampshire Calculators