IFTA is one of the most dreaded parts of running your own truck, but it's really just bookkeeping. This guide walks you through what it is, what you need, and how to file — without the headache.
What IFTA actually is
IFTA replaces the old headache of filing fuel tax separately in every state you drive through with one quarterly return. You register in your base jurisdiction — the state where your business and truck are based — and file with them, not with every state you crossed. Behind the scenes, IFTA reconciles the fuel tax you already paid at the pump against the miles you actually drove in each state, so you either owe a little more or get a credit, state by state.
What you need before you file
Three things make up an IFTA return:
- •Total miles per state. Every mile you drove in each state or province during the quarter, added up by jurisdiction.
- •Total gallons purchased per state. Every fuel purchase, grouped by the state you bought it in — keep the receipts, you'll need them if you're ever audited.
- •Your base jurisdiction. The state where your business is based and where you actually file the return — not every state you drove through.
Step by step: filing your IFTA return
- •1. Gather your per-state miles. Pull total miles driven in each state for the quarter from your trip records, mileage log, or ELD.
- •2. Gather your per-state fuel purchases. Total up gallons bought in each state, matched to receipts.
- •3. Calculate your fleet MPG. Total miles for the quarter ÷ total gallons purchased for the quarter.
- •4. Figure taxable gallons per state. Miles driven in that state ÷ your fleet MPG — this is what you owed tax on in that jurisdiction.
- •5. File through your base jurisdiction's portal. Submit your return by the quarterly deadline — April 30, July 31, October 31, or January 31.
- •6. Pay what you owe, or take your credit. States where you drove more than you fueled up mean you owe; states where you fueled up more than you drove mean a credit.
The mistakes that cost owner-operators
- •Not tracking miles by state as you go. Reconstructing a whole quarter's routes from memory at deadline time is how errors — and underpayments or overpayments — happen.
- •Losing fuel receipts. No receipt, no proof of gallons purchased in that state — that's money and documentation you can't get back.
- •Missing the quarterly deadline. Late filings bring penalties and interest, and repeated late filings can put your IFTA license at risk.
- •Guessing instead of using real records. Estimated numbers on a tax filing are a liability, not a shortcut — always work from actual logged miles and receipts.
How TruxSheet helps
TruxSheet lets you log miles and fuel by state as you run, then generates a filing-ready IFTA worksheet — per-state miles, gallons, and MPG — you can download in seconds. That turns quarterly IFTA from a full-day chore into a few minutes of review. TruxSheet prepares your worksheet; you still file it yourself with your base jurisdiction. This guide is general information, not tax advice — always verify your figures before filing.
Frequently asked questions
What is IFTA and do owner-operators have to file it?
IFTA (International Fuel Tax Agreement) is a system that simplifies fuel tax reporting for vehicles operating in multiple states or provinces. If you run a qualified motor vehicle across state lines, you generally must register for IFTA in your base state and file a return every quarter — even as a single owner-operator.
When are IFTA returns due?
IFTA returns are due four times a year: April 30, July 31, October 31, and January 31, each covering the previous quarter. File and pay on time — late filings bring penalties and interest, and repeated problems can affect your license.
What records do I need to file IFTA?
You need total miles driven in each state or province for the quarter, and total gallons of fuel purchased in each jurisdiction (with receipts). From those, you calculate your fleet MPG and the tax owed or credited per state. Keeping these logged as you go makes filing quick instead of painful.
How do I calculate miles per state for IFTA?
Track the miles you drive in each state during the quarter — either from trip records, a mileage log, or your ELD. Add them up per jurisdiction. This per-state mileage, combined with fuel purchased per state, is what the IFTA return is built on.
Can software make IFTA easier?
Yes. Instead of a shoebox of receipts and a spreadsheet, an app that logs your miles and fuel by state as you go can produce a filing-ready IFTA worksheet in seconds — turning a full-day chore into a few minutes each quarter.