Preparing for an IFTA Audit: A Step-by-Step Guide

An IFTA audit examines the records used to calculate and report a trucking company’s fuel tax obligations. Auditors may review jurisdictional mileage, total fleet distance, fuel purchases, tax-paid fuel, and previously filed IFTA returns.

The review generally focuses on the connection between reported figures and source documentation. Missing mileage, unsupported fuel purchases, or totals that do not reconcile can draw additional attention and may affect the final audit results.

Start audit preparation with a review of the records used for each IFTA return. Check reported mileage, fuel purchases, vehicle information, and jurisdiction totals for missing or inconsistent data.

Compare filed figures to original trip and fuel records to verify the reported totals. Investigate any differences early, locate missing documentation, and determine if corrections may be necessary before the audit begins.

Mileage records should show where each qualified vehicle traveled during the reporting period. Organize trip dates, origin and destination points, routes, jurisdictional miles, and total distance so reported figures can be traced back to source records.

GPS data, electronic logging records, odometer readings, and trip reports may provide additional documentation. Review records for missing trips, unexplained mileage gaps, or jurisdiction totals that do not match the IFTA return.

Fuel records help verify the gallons reported on an IFTA return and any tax-paid fuel credits claimed. Gather receipts, invoices, fuel card statements, and bulk fuel records for the audit period.

Check each record for key details, including the purchase date, fuel type, quantity, seller location, and vehicle information when applicable. Missing or incomplete documentation can make reported fuel purchases harder to substantiate during an audit.

Compare each filed IFTA return to the mileage and fuel records from the same reporting period. Jurisdictional miles, total distance, fuel purchases, and tax-paid gallons should align with the figures reported.

Investigate discrepancies before submitting records for audit. A difference may come from a data entry error, missing trip, incorrect jurisdiction assignment, or fuel purchase recorded in the wrong period. Identifying the source creates a clearer record of how reported totals were calculated.

Certain recordkeeping issues can attract closer attention during an IFTA audit. Common concerns include missing jurisdictional miles, incomplete fuel receipts, unexplained differences between trip records and reported totals, and mileage assigned to the wrong jurisdiction.

Inconsistent vehicle records can create problems too. Reviewing these areas before the audit gives trucking companies time to identify errors, understand discrepancies, and gather documentation that explains the figures reported on their returns.

Missing receipts, incomplete trip records, or gaps in mileage data should be identified early in the preparation process. Determine which reporting periods and vehicles are affected, then locate available source records that may clarify the missing information.

Avoid guessing or creating unsupported figures to fill gaps. Document known discrepancies and keep records of any corrections made. A clear explanation of a recordkeeping issue can make auditor requests easier to address.

Before the audit begins, identify where requested records are stored and who will coordinate communication. Auditors may request IFTA returns, mileage records, fuel receipts, vehicle information, and documentation tied to specific reporting periods.

Keep requested materials organized and confirm that each record corresponds to the correct vehicle and period. A clear process for retrieving documents can help the company respond efficiently and avoid confusion during the review.

Audit preparation can reveal recurring problems in mileage tracking, fuel documentation, or reporting procedures. Use those findings to improve how records are collected and reviewed during future reporting periods.

Regular reconciliations can catch missing trips, fuel discrepancies, and jurisdiction errors earlier. Clear recordkeeping procedures also give fleet managers better visibility into the information used for each IFTA return, reducing the need to reconstruct records later.