Texas IFTA Calculator

Texas is the largest trucking state in the continental US by every meaningful measure — miles driven, total freight tonnage, number of registered commercial vehicles, and sheer geographic scale. The state contains over 800,000 miles of road and multiple major freight corridors that rival entire states in volume. I-10 runs 880 miles east-west from Louisiana to New Mexico through Houston, San Antonio, and El Paso — one of the longest interstate spans in any single state. I-35 runs north-south from the Oklahoma border through Dallas/Fort Worth, Austin, and San Antonio to the Mexico border at Laredo — the NAFTA superhighway carrying enormous cross-border trade freight. I-20 connects Dallas to Midland/Odessa and El Paso. I-45 connects Dallas to Houston to Galveston.

Texas's IFTA rate of $0.200 per gallon is among the lowest in the country, tied with Louisiana. Oklahoma at $0.190 is the only notable cheaper neighboring state. New Mexico at $0.210, Arkansas at $0.285, and Louisiana at $0.200 complete the border comparison. Fuel in Texas before entering any northeastern state — the savings compound dramatically as you head toward Pennsylvania ($0.746) or New York ($0.4395).

Texas has specific weight rules. The standard 80,000 lbs applies on interstates, but Texas allows 84,000-88,000 lbs on certain state highways under specific commodity exemptions (crude oil, water, and some agricultural loads). The Permian Basin oilfield region generates continuous heavy haul permit activity, and TxDMV operates a 24-hour online permit system for oversized and overweight loads.

Weigh stations on I-10 near Balmorhea, on I-35 near Laredo and Gainesville, and on I-20 at the New Mexico border are active. For IFTA compliance, the sheer scale of Texas means carriers can easily rack up 500-1,000 Texas miles per run — keep odometer logs clean and ensure every Texas fuel purchase is logged. The state's low rate means you'll typically generate a net refund when fueling here and running into higher-rate neighboring states.