IFTA Mileage & Fuel Tax Calculator

Calculate your state-by-state fuel tax for quarterly IFTA reporting. Rates updated Q1 2026.

Report Settings

Mileage & Fuel Entry

Enter miles driven and gallons purchased in each jurisdiction

#JurisdictionMiles DrivenGallons Purchased
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Summary

Total Miles
0
Total Gallons
0.000
Fleet MPG
0.00
Tax Paid
$0.00
Tax Due
$0.00
Net Tax
$0.00
Enter mileage and fuel data to calculate

IFTA Quarterly Report

Q1 2026 · Diesel

Enter mileage and fuel data above to generate your IFTA report.

How IFTA Works

The International Fuel Tax Agreement (IFTA) simplifies fuel tax reporting for carriers operating in multiple U.S. states and Canadian provinces. Instead of filing separately in each jurisdiction, you file one quarterly return with your base jurisdiction.

How it's calculated:IFTA computes your fleet's average MPG across all miles driven. For each state, it calculates how many gallons you "should have consumed" (taxable gallons = state miles ÷ fleet MPG). You owe that state's tax rate on those taxable gallons, minus any tax already paid on fuel purchased in that state.

States where you drove more than you fueled up will show tax owed. States where you fueled up more than you drove will show a credit. The net amount is what you pay (or get refunded) each quarter.