District of Columbia Gas Tax Calculator

2026

District of Columbia charges 35.9¢ a gallon in District tax on gasoline and 35.9¢ on diesel in 2026, on top of the federal 18.4¢ and 24.4¢: 54.3¢ and 60.3¢ 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.

District of Columbia Gas Tax Overview

District of Columbia’s District tax on gasoline is 35.9¢ a gallon and 35.9¢ on diesel, the rate in force since October 1, 2026. That is the 14th-highest state gasoline tax of the 50 states and DC. Base tax fixed; the surcharge is adjusted for Washington-area inflation each October 1.

With the federal 18.4¢, a gallon of gasoline carries 54.3¢ of per-gallon tax, so a 15-gallon fill-up includes about $8.14 of fuel tax whatever the pump price.

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

District of Columbia Fuel Taxes (2026)

State Gasoline Tax 35.9¢/gal
State Diesel Tax 35.9¢/gal
Federal Excise Tax 18.4¢ gasoline / 24.4¢ diesel
Total per Gallon 54.3¢ gasoline / 60.3¢ diesel
How the State Rate Is Built Gasoline and diesel: 23.5¢ motor fuel tax + 12.4¢ local transportation surcharge for Tax Year 2027, beginning October 1, 2026 (DC Register notice; it was 12.2¢ for Tax Year 2026).
Next Change October 1, 2027: new rate not yet published

Official Sources:

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