IFTA Due Dates for 2026 (and What Happens If You Miss One)

The 2026 deadlines

The statutory due date is the last day of the month following each quarter. When that lands on a Saturday, Sunday, or holiday, the deadline moves to the next business day — which happens twice this cycle:

What a late filing actually costs

File late or pay late and most jurisdictions assess a penalty of $50 or 10% of the net tax due — whichever is greater — plus interest on the unpaid tax for every month it’s outstanding. The sting isn’t the $50; it’s that repeated late filings put your IFTA license itself at risk, and losing that parks the truck.

The date that counts is generally the postmark or electronic submission date, not when the money clears. Filing on the due date is legal; filing the day after is late.

Didn’t run this quarter? You still file.

An IFTA license means you file every quarter — including quarters with no miles. That’s called a zero report, it takes two minutes, and skipping it triggers the same late penalties as skipping a real one. If you’re parked for a season, file the zeros or formally cancel the license.

The records you must keep

IFTA audits are records audits. You’re expected to keep, for four years from the filing date:

• Distance records by jurisdiction — every mile, loaded or empty, assigned to a state or province
• Fuel receipts for every purchase (date, seller, gallons, fuel type, price, unit)
• Trip records that tie the miles and the fuel together

The easy version

All of this exists because paper records rot in shoeboxes. If every fuel stop is tagged by state the moment you buy it, and every mile is logged as you run it, the quarterly report assembles itself — and an audit becomes an export button. That’s exactly what Load Cabin does, and it’s free to try for 30 days.