Stop fighting spreadsheets at midnight. Enter your per-state miles and fuel receipts — or import them as CSV — and get exactly what you owe each state: tax due, pump credits, net. One click. No account. Nothing leaves your browser.
Calculate Free How it works ↓Pick your base state and the filing quarter. The right tax-rate table loads automatically — rates refresh every quarter, sourced from the official IFTA, Inc. matrix.
Your paper log, GPS export or spreadsheet — one row per state you ran, or import the whole quarter as CSV. Either way beats typing legs one at a time into a $15/month form.
Date, state, gallons — from the pump receipts in your door pocket. Hit Calculate and every state's math is laid out line by line. Print it, file it, done.
The International Fuel Tax Agreement is a deal among 48 U.S. states and Canadian provinces: instead of filing fuel tax returns in every state you drive through, you file one quarterly return with your base state, which redistributes the money. If you operate a qualified motor vehicle (26,001+ lbs GVW, or 3+ axles) across state lines, you generally file IFTA — every quarter, even if you didn't drive.
Add up total miles and total gallons for the quarter to get your fleet MPG. Divide each state's miles by that MPG to estimate fuel burned there. Multiply by each state's tax rate to get tax due, subtract the tax you already paid at the pump in that state, and the remainder is what you owe or get credited. That's exactly the math this calculator runs — with every line shown so you can check it.
That's who it's built for. Pre-2000 rigs, driveaway operations and short-haul exemptions mean plenty of owner-operators still keep a paper mileage log. Enter your per-state miles directly, or transcribe them to the CSV template once and import.
No. The calculator runs entirely in your browser — your logs never leave your machine. There's no account system and no database. Close the tab and it's gone, so export your report before you do.
States charge penalties and interest on late or incorrect returns ($50+ and 10%+ of tax due in many jurisdictions), and sloppy returns invite audits. This tool does the arithmetic accurately and shows its work — but the numbers you file are your responsibility, so double-check against the current official rate table (linked in the app).
Run the numbers now — free, no signup. Upgrade only when you're ready to file.
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