Q4 2026 IFTA diesel rate
Wisconsin IFTA fuel tax rate, Q4 2026
WIWisconsin · diesel$0.3290/gal
Unchanged from Q3 2026.
Checked 2026-10-14 against revenue.wi.gov, Wisconsin's own published rate.
Calculate Wisconsin for Q4 2026Free. No account.
What you owe Wisconsin
IFTA apportions your fuel by miles. Divide total miles by total gallons for fleet MPG, turn your Wisconsin miles into taxable gallons, subtract the tax-paid gallons you bought in Wisconsin, and multiply by $0.3290.
Example: 1,000 miles in Wisconsin at 6.5 MPG is 153.85 taxable gallons. With 100 tax-paid gallons bought there, 53.85 × $0.3290 = $17.72 owed to Wisconsin.
This rate is for diesel, Q4 2026. You still file with your base jurisdiction; keep your trip records and receipts.