Q4 2026 IFTA diesel rate
Mississippi IFTA fuel tax rate, Q4 2026
MSMississippi · diesel$0.2400/gal
Unchanged from Q3 2026.
Checked 2026-10-14 against dor.ms.gov, Mississippi's own published rate.
Calculate Mississippi for Q4 2026Free. No account.
What you owe Mississippi
IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Mississippi miles into taxable gallons, subtract the tax-paid gallons you bought in Mississippi, and multiply by $0.2400.
Example: 1,000 miles in Mississippi at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.2400 = $12.92 owed to Mississippi.
This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.