Q4 2026 IFTA diesel rate
Tennessee IFTA fuel tax rate, Q4 2026
TNTennessee · diesel$0.2700/gal
Unchanged from Q3 2026.
Checked 2026-10-14 against tn.gov, Tennessee's own published rate.
Calculate Tennessee for Q4 2026Free. No account.
What you owe Tennessee
IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Tennessee miles into taxable gallons, subtract the tax-paid gallons you bought in Tennessee, and multiply by $0.2700.
Example: 1,000 miles in Tennessee at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.2700 = $14.54 owed to Tennessee.
This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.