Louisiana diesel tax rate is 20.0¢ per gallon for 2026. Calculate your quarterly IFTA fuel tax liability for Louisiana routes and compare to neighboring states.
Calculate Your Louisiana IFTA Tax
Gallons consumed in Louisiana→
Net taxable gallons→
Louisiana tax rate (2026)→20.0¢/gal
Estimated Louisiana IFTA→
Positive = amount owed to Louisiana; negative = credit on your return.
Louisiana IFTA Rates & Trucking Overview 2026
Louisiana ties Texas at 20.0¢/gal — among the lowest diesel rates in the country. The state's trucking economy is dominated by petrochemicals, with the Baton Rouge–New Orleans corridor containing the highest concentration of oil refineries and chemical plants in North America. Port of New Orleans and Port of South Louisiana are two of the top ports in the US by cargo tonnage.
Major Louisiana Trucking Routes
I-10 (Houston–Baton Rouge–New Orleans–Mississippi, primary east-west), I-20 (Shreveport–Monroe–Mississippi), I-49 (Lafayette–Shreveport, north-south), I-12 (Baton Rouge–Slidell, east of New Orleans)
I-10 through Louisiana, particularly between Baton Rouge and New Orleans, carries enormous industrial and port freight volumes. Flatbed and tanker loads dominate — chemicals, LNG, agricultural products, and manufactured goods all transit this corridor. Texas to the west matches Louisiana's rate exactly, while Mississippi to the east at 18.4¢ is slightly better — the only state cheaper than Louisiana.
Louisiana IFTA — Frequently Asked Questions
What is Louisiana's IFTA diesel tax rate in 2026?
Louisiana's diesel rate is 20.0¢/gal for 2026, tying Texas as one of the lowest in the US. Only Mississippi (18.4¢) and Oklahoma/Missouri (19.0¢ each) are cheaper. The Gulf Coast corridor from TX–LA–MS offers some of the best fueling rates in the country.
Who administers IFTA for Louisiana-based carriers?
Louisiana IFTA is administered by the Department of Revenue. File quarterly at revenue.louisiana.gov. Louisiana also requires a Intrastate Operating Authority registration for LA-domiciled carriers operating solely within the state.
What freight industries dominate Louisiana?
Petrochemicals and energy are the dominant freight types — tankers carrying crude oil, refined products, and chemical feedstocks run constantly on I-10. Port freight (containers, bulk commodities, agricultural exports) and construction materials (post-hurricane rebuilding) also generate substantial volumes.
Are there special route restrictions in New Orleans?
Yes. I-10 through New Orleans has height restrictions at several elevated sections and the Claiborne Avenue ramp. Some hazmat routes require permits and specific timing through the city. Check DOTD.la.gov for current commercial vehicle advisories.
Fueling tip: Louisiana and Texas are tied at 20.0¢ — no savings crossing the TX/LA border. Mississippi at 18.4¢ is slightly cheaper. These three states form the cheapest fueling corridor in the US for I-10 runs.