IFTA Filing Explained: What It Is, What You Need, and How to Stop Dreading It

IFTA is the reason a lot of fleets lose a weekend four times a year. The rules are not complicated. The problem is almost always that the records needed to file were never kept in a usable form, so filing becomes an archaeology project instead of a data entry task.

Here is what IFTA is, what you actually need, and how to make the quarter end uneventful.

What IFTA is

The International Fuel Tax Agreement is an arrangement between the lower 48 US states and the Canadian provinces that simplifies fuel tax reporting for fleets operating across jurisdictions.

Without it, you would file fuel tax separately in every state you drove through. Under IFTA you file one quarterly return with your base jurisdiction, and that jurisdiction distributes what you owe to the others.

The principle is simple: you pay fuel tax to the jurisdictions where you burned the fuel, not where you bought it. If you buy cheap fuel in one state and drive the miles in another, IFTA settles the difference.

Who needs it

Generally, fleets operating qualified motor vehicles across two or more IFTA jurisdictions. A qualified vehicle is broadly one over a certain weight threshold or with three or more axles, used for business.

Intrastate-only operations do not need IFTA. Check your specific situation against your base jurisdiction’s current guidance rather than a summary.

What you actually have to track

This is the whole game, and it is only two things.

Miles by jurisdiction

Every mile driven, attributed to the state or province it was driven in. That includes all miles, not just loaded ones. Deadhead, personal conveyance and out-of-route miles all count.

Fuel purchased by jurisdiction

Every fuel purchase, with gallons, date and location. You need the receipt or a fuel card statement detailing the same information.

That is it. The tax calculation itself is arithmetic your base jurisdiction’s form does for you. The reason IFTA is painful is not the maths, it is that most carriers do not have those two records in a clean form when the quarter ends.

The mistakes that cause audits

Estimated miles

Round numbers and estimates are the clearest audit signal there is. Jurisdictions compare your reported miles against your fuel purchases, and estimates do not reconcile.

Missing fuel receipts

An undocumented fuel purchase generally cannot be claimed as tax paid, which increases what you owe. A shoebox of faded thermal paper is worth less than it looks.

Forgetting non-revenue miles

Deadhead, repositioning and personal conveyance miles are still miles driven in a jurisdiction. Leaving them out makes your fuel and mileage fail to reconcile.

Ignoring the record retention period

Jurisdictions require records to be kept for several years after filing. An audit can reach back well past the quarter you are thinking about.

Filing late or not at all

A zero-activity quarter still usually requires a return. Missing it can put your IFTA licence at risk, and without it you are not legally operating interstate.

How to make it uneventful

The fleets who find IFTA easy are not better at tax. They are the ones whose mileage and fuel data was already captured as it happened.

• Mileage from your ELD. Most ELD and telematics platforms produce jurisdiction mileage. Check whether yours exports it in a form your filing process can use.
• Fuel receipts captured at the pump, photographed there and then rather than collected in the cab.
• A fuel card that reports properly, with gallons, location and date on every transaction. See fuel cards for truckers.
• Reconcile monthly, not quarterly. Three small checks beat one large reconstruction.

Hey Bubba! is an AI back-office automation platform for fleets. It captures fuel receipts photographed on the road, pulls jurisdiction mileage from your connected ELD, and keeps both alongside the paperwork behind every load, so the quarter end is a report rather than a search.

Get started with Hey Bubba!, or check whether your ELD is one of the 45+ we connect to.

Frequently Asked Questions

1. How often do I file IFTA?
Quarterly. Your base jurisdiction sets the deadlines, and they are published on its website. Check there rather than relying on a general summary, because details vary.

2. Do I have to file if I did not run that quarter?
Usually yes. Most jurisdictions require a return even with zero activity. Missing it can put the licence at risk.

3. What records do I need to keep, and for how long?
Mileage by jurisdiction and fuel purchase records with gallons, date and location, retained for the period your base jurisdiction specifies, which runs several years. Keep them in a form you could actually produce on request.

4. Can my ELD do IFTA for me?
Many ELDs produce jurisdiction mileage, which is half of it. You still need documented fuel purchases to claim tax already paid. Check what your provider exports before assuming it is handled.

5. What happens if I am audited?
You will be asked to produce mileage and fuel records for the periods under review. Carriers who kept records as they went generally find it uneventful. Carriers reconstructing from memory generally do not.

6. Does buying fuel in a cheap state save me money under IFTA?
Less than people think. IFTA settles tax based on where you burned the fuel, so the tax component largely equalises. You still save on the pre-tax price difference, which is real but smaller than the pump sign suggests.

Published 09/23/26. IFTA rules, tax rates and deadlines change and vary by jurisdiction. This article is general information, not tax or compliance advice. Verify current requirements with your base jurisdiction. If something here is out of date, tell us at [email protected] and we will correct it.