Q4 2026 IFTA diesel rate

Iowa IFTA fuel tax rate, Q4 2026

IAIowa · diesel$0.3250/gal

Unchanged from Q3 2026.

Checked 2026-10-14 against revenue.iowa.gov, Iowa's own published rate.

Calculate Iowa for Q4 2026Free. No account.

What you owe Iowa

IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Iowa miles into taxable gallons, subtract the tax-paid gallons you bought in Iowa, and multiply by $0.3250.

Example: 1,000 miles in Iowa at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.3250 = $17.50 owed to Iowa.

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