IFTA audit checklist: what auditors ask small carriers for

IFTA member jurisdictions audit a share of their licensees every year, and being small is no protection — a single truck with tidy books is far less painful to audit than five trucks with none. An audit is a records exercise: the auditor tries to rebuild your quarterly returns from your source documents. Where the documents cannot support the numbers, the miles or gallons in question are usually disallowed, and disallowed fuel credit becomes tax due.

The four-year rule

Records supporting your quarterly returns must be kept for four years from the return due date or filing date, whichever is later. Bulk fuel records and mileage source documents are part of that, not just the returns themselves. If a record only exists as a photo on a phone you replaced, you do not have it.

Distance records

• Trip records showing date, origin and destination, and route of travel.
• Beginning and ending odometer readings for each trip.
• Total trip miles and miles broken out by jurisdiction.
• Unit number or VIN, and the driver.
• All miles — loaded, empty, deadhead, bobtail, and personal.

Rounded, suspiciously even state splits are the classic audit trigger. If Ohio is exactly 500 miles every single quarter, expect questions.

Fuel records

• Original receipts or invoices for every tax-paid purchase you claimed.
• Date, seller name and location, gallons, fuel type, price per gallon or total, and the vehicle fueled.
• Bulk fuel: purchase invoices into the tank plus withdrawal records with meter readings, by vehicle.
• Proof the fuel tax was paid at the pump — that is what makes it creditable.

Returns and licensing

• Filed quarterly returns for every quarter in the audit period, including zero returns.
• Proof of payment for tax, penalty, and interest.
• IFTA license and decal records for each year and each unit.
• Your worksheets — the calculation behind each return, not just the filed figures.

The gaps that become assessments

1. 1.Missing miles. Personal and deadhead miles left out inflate MPG and understate taxable gallons in every jurisdiction.
2. 2.Fuel claimed without a compliant receipt. The credit is removed and the gallons become taxable.
3. 3.An MPG that is not credible. Sustained figures well outside a normal range for the equipment invite a reconstructed calculation using a standard MPG.
4. 4.Bulk fuel with no withdrawal log. Purchases into a tank do not prove which truck burned the fuel or where.
5. 5.Wrong quarter's rates. Rates change every quarter; using the current table for an older quarter produces wrong tax in both directions.
6. 6.Surcharge jurisdictions skipped. Kentucky and Virginia surcharges are computed on taxable gallons and are easy to omit.

An hour of prep that pays for itself

1. 1.Pull the last four years of filed returns into one folder, by quarter.
2. 2.For each quarter, confirm you can produce the worksheet that supports it.
3. 3.Spot-check one month of trip records against one month of fuel receipts.
4. 4.Scan or photograph any receipt that exists only on thermal paper.
5. 5.Recompute the fleet MPG for two quarters and see whether the numbers look like the same truck.

How FuelTaxDesk fits in

You enter your own miles and gallons — there is no ELD requirement and no GPS tracker to install. FuelTaxDesk applies the official quarterly rates, handles the Kentucky and Virginia surcharges, produces a printable worksheet you can transcribe onto your base jurisdiction's return, and keeps four years of worksheets on file. Pricing is flat, and you remain the filer of record.

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