Mississippi IFTA Calculator

Mississippi has the second-lowest diesel tax rate in the country at $0.183 per gallon, making it a strategic fueling state for carriers running the I-55 corridor and other north-south routes through the mid-South. I-55 runs north-south through the entire western portion of the state from Memphis to New Orleans, passing through Jackson. I-20 runs east-west through Jackson connecting Shreveport to Alabama. I-59 runs diagonally from New Orleans through Hattiesburg toward Birmingham. The Gulf Coast ports at Pascagoula and Gulfport handle petroleum, chemicals, and manufactured goods. The agricultural industry — cotton, soybeans, catfish aquaculture — generates significant freight from the Delta region.

At $0.183, Mississippi's rate is dramatically lower than many neighboring states. Tennessee at $0.210 is higher, Louisiana at $0.200 is marginally higher, Alabama at $0.290 is notably higher, and Arkansas at $0.285 is higher. Drivers southbound on I-55 heading through Memphis should plan fuel stops in Mississippi rather than Tennessee whenever mileage and tank capacity allow. Northbound drivers from Louisiana should also fill up in Mississippi before continuing north.

Standard weight limits are 80,000 lbs on interstates. Mississippi is one of the more permissive states for overweight permits on state routes — permits can be obtained from MDOT for loads up to 150,000 lbs with appropriate route approval. The petrochemical industry around Pascagoula regularly moves heavy industrial equipment requiring such permits.

Weigh stations on I-55 at Hernando near the Tennessee border and at McComb near the Louisiana border are regularly active. The state enforces commercial vehicle regulations through MHP enforcement officers who patrol the major corridors. For IFTA compliance, Mississippi's low rate means you'll almost certainly show a net refund on your quarterly filing if you fuel here and run miles in higher-rate states — capture every Mississippi gallon accurately so you receive the full refund you're entitled to.