Q4 2026 IFTA diesel rate
Delaware IFTA fuel tax rate, Q4 2026
DEDelaware · diesel$0.2200/gal
Unchanged from Q3 2026.
Checked 2026-10-14 against dmv.de.gov, Delaware's own published rate.
Calculate Delaware for Q4 2026Free. No account.
What you owe Delaware
IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Delaware miles into taxable gallons, subtract the tax-paid gallons you bought in Delaware, and multiply by $0.2200.
Example: 1,000 miles in Delaware at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.2200 = $11.85 owed to Delaware.
This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.