Q4 2026 IFTA diesel rate

Indiana IFTA fuel tax rate, Q4 2026

INIndiana · diesel$0.6300/gal

Unchanged from Q3 2026.

Checked 2026-10-14 against in.gov, Indiana's own published rate.

Calculate Indiana for Q4 2026Free. No account.

What you owe Indiana

IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Indiana miles into taxable gallons, subtract the tax-paid gallons you bought in Indiana, and multiply by $0.6300.

Example: 1,000 miles in Indiana at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.6300 = $33.92 owed to Indiana.

Indiana lists a separate surcharge line on IFTA returns. Not included in the total yet.

This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.