IFTA Quarterly Filing Checklist

Who This Applies To

• Motor carriers preparing to file an IFTA quarterly return and checking whether all required records are ready.
• Bookkeepers or accounting staff who compile the IFTA return from driver records and want a structured pre-filing review.
• Owner-operators who handle their own IFTA filings and want to avoid the common gaps that cause amended returns.
• Carriers who filed a prior quarter with errors and are preparing the next return more carefully.

What To Verify

• That mileage records exist at the trip level — not just a quarterly summary — with jurisdiction breakdowns for each vehicle and each trip that crossed a state or provincial line.
• That each fuel purchase has a receipt showing the purchase date, seller location (city and state or province), vehicle unit, fuel type, and gallons purchased. Fleet card summary exports alone are not enough if they don't show per-transaction location detail.
• The current quarter's official fuel tax rate matrix. Rates change quarterly; the matrix from the prior quarter is wrong for the current one even if the numbers look similar.
• The base jurisdiction's accepted filing format — paper, portal, or third-party software — and whether any credentials (portal login, account PIN) need to be refreshed before filing begins.

Step-by-Step Overview

1. Pull trip records for the quarter, organized by vehicle. Count the total number of qualified vehicles and confirm that every vehicle that operated has records.
2. Build a mileage summary: total miles driven in each jurisdiction, per vehicle. Reconcile the summary back to the individual trip records. If the numbers don't reconcile, find the discrepancy before filing.
3. Build a fuel summary: total gallons purchased in each jurisdiction, per vehicle. Pull receipts or fleet card detail exports for each transaction. Verify that every purchase location maps to a specific jurisdiction.
4. Apply the current-quarter rate matrix. Calculate gross tax owed per jurisdiction (miles × rate) and tax paid per jurisdiction (gallons purchased × rate). The net tax per jurisdiction is the difference.
5. Sum the net tax across all jurisdictions for the return total. If the total is a credit, check the base jurisdiction's process for requesting a refund or carrying the credit to the next quarter.
6. File through the base jurisdiction's accepted channel by the confirmed due date. Save the filing confirmation with the date, submission reference, and any payment confirmation.

Common Mistakes

• Filing from a summary without checking the underlying trip records. If the summary has an error, the return has an error — auditors pull the source records, not just the summary.
• Missing vehicles. A fleet with seven trucks that only has records in the return for six trucks will draw attention in an audit.
• Using a rate from a tax software tool or third-party calculator without verifying it matches the current official rate matrix. Software rate tables are not always updated on the same day IFTA Inc. publishes new rates.
• Not reconciling mileage against fuel purchases before filing. A return where the fuel consumption rate is unusually high or low compared to miles driven is a common audit trigger.
• Filing on the due date without having tested portal access first. Account lockouts, password resets, and browser compatibility issues become critical problems at 11 PM on a due date.