Q4 2026 IFTA diesel rate
Louisiana IFTA fuel tax rate, Q4 2026
LALouisiana · diesel$0.2000/gal
Unchanged from Q3 2026.
Checked 2026-10-14 against revenue.louisiana.gov, Louisiana's own published rate.
Calculate Louisiana for Q4 2026Free. No account.
What you owe Louisiana
IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Louisiana miles into taxable gallons, subtract the tax-paid gallons you bought in Louisiana, and multiply by $0.2000.
Example: 1,000 miles in Louisiana at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.2000 = $10.77 owed to Louisiana.
This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.