What We Do
IFTA Calculation is a free, browser-based calculator that helps owner-operators and small trucking fleets estimate their quarterly International Fuel Tax Agreement (IFTA) net tax due or refund. Enter your miles driven and fuel purchased by state or province, and the tool applies the current quarter's published tax rates to show you a jurisdiction-by-jurisdiction breakdown — in seconds, with nothing to install and nothing sent to a server.
Why We Built It
Every quarter, drivers and small carriers spend hours manually looking up dozens of state and provincial fuel tax rates and running the same repetitive math: fleet MPG, taxable gallons per state, tax due versus tax already paid at the pump. We built this tool to compress that into a few minutes, so you can sanity-check your numbers before filing — or just get a fast read on whether you're likely to owe or get a credit this quarter.
Where Our Rate Data Comes From
Quarterly tax rates are compiled from official and quasi-official public sources, including state Department of Transportation fuel tax rate publications and the IFTA, Inc. Tax Rate Matrix (iftach.org), the official clearinghouse for IFTA member jurisdictions. Rate tables are refreshed each quarter; the "last verified" date is shown alongside the data on the calculator page.
What This Tool Is Not
This is an estimation tool, not a filing service and not tax advice. It doesn't submit anything to any tax authority, and it doesn't replace the judgment of a qualified accountant familiar with your specific operation. See our Terms of Service for details.
Your Data
Trip figures you enter into the calculator stay in your browser — they're never sent to or stored on our servers. Read more in our Privacy Policy.
Contact
Questions, corrections, or found a rate that looks off? Email contact@iftacalculation.com — we welcome corrections, since accuracy is the whole point of the tool.