Mississippi Gas Tax Calculator

2026

Mississippi charges 24.4¢ a gallon in state tax on gasoline and 24.4¢ on diesel in 2026, on top of the federal 18.4¢ and 24.4¢: 42.8¢ and 48.8¢ 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.

Mississippi Gas Tax Overview

Mississippi’s state tax on gasoline is 24.4¢ a gallon and 24.4¢ on diesel, the rate in force since July 1, 2026. That is the 39th-highest state gasoline tax of the 50 states and DC. Rises to 27¢ on July 1, 2027; from July 2029, adjusted every other year to highway construction costs, by at most 1¢.

With the federal 18.4¢, a gallon of gasoline carries 42.8¢ of per-gallon tax, so a 15-gallon fill-up includes about $6.42 of fuel tax whatever the pump price. Hancock, Harrison and Jackson counties add a 3¢ seawall tax on gasoline.

Scheduled change: from July 1, 2027 the rate becomes 27.4¢ on gasoline and 27.4¢ on diesel.

Mississippi Fuel Taxes (2026)

State Gasoline Tax 24.4¢/gal
State Diesel Tax 24.4¢/gal
Federal Excise Tax 18.4¢ gasoline / 24.4¢ diesel
Total per Gallon 42.8¢ gasoline / 48.8¢ diesel
How the State Rate Is Built Gasoline and diesel: 24¢ excise + 0.4¢ environmental protection fee.
Next Change July 1, 2027: 27.4¢ gasoline / 27.4¢ diesel

Official Sources:

Other Mississippi Calculators