Mississippi diesel tax rate is 18.4¢ per gallon for 2026. Calculate your IFTA fuel tax for Mississippi routes and compare neighboring state rates.
Calculate Your Mississippi IFTA Tax
Gallons consumed in Mississippi→
Net taxable gallons→
Mississippi tax rate (2026)→18.4¢/gal
Estimated Mississippi IFTA→
Positive = amount owed to Mississippi; negative = credit on your return.
Mississippi IFTA Rates & Trucking Overview 2026
Mississippi has the lowest IFTA diesel tax rate in the country at 18.4¢/gal — lower than Oklahoma and Missouri (both 19.0¢) and Texas (20.0¢). For any driver routing through Mississippi, fueling here is almost always the right call. Jackson is the state's primary freight hub at the I-20/I-55 interchange, connecting Memphis, New Orleans, and Atlanta.
The Gulf Coast corridor on I-10 through Biloxi connects to Louisiana (also 20.0¢) and Alabama (29.0¢). On east-west I-20 runs, fill up in Mississippi before entering Alabama (29.0¢) — a 10.6¢/gal difference. On I-55 north-south runs, Tennessee (27.4¢) to the north is 9¢ higher. Mississippi's ports on the Gulf and the Mississippi River handle significant agricultural exports, forest products, and petrochemicals.
Mississippi IFTA — Frequently Asked Questions
What is Mississippi's IFTA diesel tax rate in 2026?
Mississippi has the lowest diesel tax rate in the US at 18.4¢/gal for 2026. Every single neighboring state charges more. If your route takes you through Mississippi, fuel here without question.
Who administers IFTA for Mississippi-based carriers?
Mississippi IFTA is administered by the Department of Revenue. File quarterly at tap.dor.ms.gov. Mississippi's low rate means MS-based carriers typically see IFTA credits from higher-rate states offsetting their in-state consumption.
How much do I save fueling in Mississippi vs. other states?
vs. Alabama (29.0¢): save 10.6¢/gal or $15.90 on 150 gal. vs. Tennessee (27.4¢): save 9.0¢/gal or $13.50. vs. Arkansas (28.5¢): save 10.1¢/gal or $15.15. The savings add up fast on high-mileage routes.
What major freight moves through Mississippi?
Agriculture (soybeans, cotton, catfish — MS is the #1 catfish producer), forest products (lumber, paper), petrochemicals from the Gulf Coast, and steel from the Nucor mill in Flowood. The Mississippi River ports handle substantial export grain and import cargo.
Fueling tip: Mississippi is the cheapest fueling state in the US at 18.4¢/gal. Every neighboring state costs more. Fill up to maximum whenever in Mississippi.