Missouri IFTA Calculator

Missouri sits at the geographic center of the lower 48 states and earns its claim as the "Gateway to the West." St. Louis is one of the most important freight cities in the Midwest — it sits at the junction of I-70 (the main east-west national corridor) and I-55 (the main north-south corridor from Chicago to New Orleans). I-44 runs southwest from St. Louis through Joplin to Oklahoma City. I-29 runs north along the Missouri River from Kansas City to Sioux City. Kansas City itself is a major intermodal hub with extensive rail connections and distribution infrastructure. Missouri's agricultural output — corn, soybeans, hogs, cattle — generates significant freight from the rural interior.

At $0.197 per gallon, Missouri has one of the lowest diesel tax rates in the Midwest. This makes Missouri a prime fueling destination before entering higher-rate states in every direction: Illinois at $0.463 to the east, Iowa at $0.325 to the north, Kansas at $0.260 to the west, and Tennessee at $0.210 to the southeast (though Tennessee is also competitive). Drivers heading east on I-70 toward St. Louis should fill up before the Illinois border — the savings on a 150-gallon fill between Missouri's $0.197 and Illinois' $0.463 is $39.90.

Standard weight limits are 80,000 lbs on interstates. Missouri has a significant network of secondary and county roads used for agricultural hauling with seasonal weight restrictions typical of Midwest spring thaw periods. Oversize permits for wind turbine components and construction equipment moving through Missouri are common given the state's central location as a route for freight heading to multiple regions.

Weigh stations on I-70 near the Illinois border at St. Louis and near the Kansas border are active. I-44 weigh stations near Springfield and near the Oklahoma border are staffed. For IFTA compliance, Missouri's Department of Revenue runs a straightforward online system — the low rate often generates net refunds for carriers who fuel cheaply here and run extensive miles in Illinois and Indiana, so track Missouri purchases precisely.