Who this is for: carrier, owner-operator
IFTA Mileage and Fuel Recordkeeping Requirements
IFTA licensees must maintain trip records showing miles traveled in each jurisdiction and fuel receipts for all purchases. Records must be kept for at least 4 years. An IFTA audit can be triggered at any time, and inadequate records typically result in estimated assessments at unfavorable default rates.
Important Notice
IFTA recordkeeping requirements are specified by the IFTA compact and may be supplemented by your base jurisdiction. Contact your base state's IFTA office for jurisdiction-specific requirements.
Checklist
Checkboxes reset on page reload. This is a reference tool only — not a saved record.
What qualifies as an acceptable fuel receipt
To claim a fuel tax credit for a retail fuel purchase, the receipt must show: date of purchase; name and address of the seller; number of gallons purchased; fuel type (diesel, gasoline, etc.); price per gallon; total price; and the vehicle plate number or unit number. Receipts that do not show vehicle identification are generally rejected in an IFTA audit — in a multi-truck fleet, the auditor cannot tie a purchase to a specific qualified vehicle without it. Credit card receipts that show a total charge but not the gallons purchased may also fail. A carrier who uses a fuel card that captures all required fields has an easier audit than one who relies on a mix of card receipts and gas station paper printouts.
ELD and GPS data as trip records
Electronic Logging Devices and GPS systems can generate jurisdiction-level mileage reports that satisfy IFTA recordkeeping requirements, provided the data is accurate and complete. Many fleet management platforms automatically produce quarterly IFTA mileage summaries by state. Before relying on ELD data for a quarterly return, reconcile the total jurisdiction miles reported against the vehicle's actual odometer change over the same period. If the ELD total and the odometer change differ by more than a few percent, investigate before filing — GPS coverage gaps, personal conveyance miles handled inconsistently, or a misconfigured jurisdiction boundary are common sources of discrepancy. The underlying data, not just the ELD report, must be auditable.
What happens in an IFTA audit
IFTA licensees can be audited by their base jurisdiction at any time — there is no minimum operating history required before an audit can be initiated. The auditor examines trip records, fuel receipts, odometer readings, and quarterly returns for accuracy and consistency. If records are missing, inadequate, or internally inconsistent, the auditor reconstructs mileage and fuel consumption using default assumptions — typically worst-case rates that produce a higher tax liability than accurate records would show. Carriers with complete, organized records are in a significantly better position than those scrambling to reconstruct data from memory. A straightforward audit with clean records is usually resolved quickly; one with gaps drags on and results in a larger assessment.
Recordkeeping for owner-operators without fleet software
Owner-operators managing IFTA records without dedicated software can maintain adequate records with a trip log book (recording jurisdiction crossings and odometer readings daily), fuel receipts organized by month in an envelope or folder, and a simple quarterly spreadsheet that summarizes miles and gallons by state. Some owner-operators use a dedicated IFTA app or their ELD's built-in jurisdiction report. Whatever method is used, the records must be accurate, complete, and retrievable on short notice. An IFTA auditor who visits or sends a records request expects documentation within a reasonable timeframe — having records scattered across a glove box, old receipts pockets, and a laptop folder is a problem that only surfaces under pressure.
Common recordkeeping mistakes that create audit exposure
IFTA audits consistently turn up the same problems. Fuel receipts without vehicle unit numbers — in a multi-vehicle fleet, an auditor cannot allocate a purchase to a specific truck without that identifier. Trip logs where state crossings are approximated from memory rather than odometer readings, producing mileage that doesn't match GPS or ELD data. And bulk fuel drawn from a carrier-owned tank that isn't tracked by vehicle and date — auditors compare total bulk withdrawals against what was reported across all vehicles on the quarterly returns, and a gap results in either a disallowed credit or an assessed fuel consumption using default rates. Each of these mistakes is avoidable with habits built into daily operations.
What to do when records are lost or destroyed
Fire, flood, equipment failure, and theft happen. If you lose IFTA records, contact your base jurisdiction's IFTA office immediately and explain the situation before the next quarterly return or audit contact. The auditor has some discretion but is generally required to reconstruct your tax liability using default or worst-case assumptions when documentation is unavailable. Fuel card transaction histories, ELD data preserved in the provider's cloud system, dispatch logs, and bank or credit card statements can help reconstruct at least part of the missing record. A partial reconstruction supported by whatever evidence remains is a better starting point than nothing. The key is to communicate proactively with the IFTA office before an audit, not after.
Frequently Asked Questions
What if I bought fuel in a state but don't have the receipt?
Without a valid fuel receipt, you generally cannot claim a tax credit for that purchase. The fuel will still count as consumed in the jurisdictions where you drove, but the undocumented purchase cannot offset that consumption on the return. Keep all fuel receipts — physical or digital — organized throughout the quarter. A fuel card that captures all required fields is the most reliable backup.
Do I need to keep records for quarters where I had no activity?
Yes. The 4-year retention requirement applies to all filed returns, including zero-activity returns. Keep a copy of every return submitted and any supporting records. Even a zero return is an auditable document.
How far back can an IFTA auditor look?
IFTA requires licensees to retain records for 4 years from the due date or filing date of the return, whichever is later. A routine compliance audit covers those 4 years. Some jurisdictions can look further if fraud is suspected, but standard audits operate within the 4-year window.
If I'm leased to a carrier, who keeps the IFTA records?
This depends on your lease agreement and operating authority. If the carrier manages IFTA filings for your vehicle under the carrier's license, the carrier retains the records. If you operate under your own IFTA license, you retain your own records. Confirm the arrangement in writing — it affects who bears audit exposure.
My ELD shows different jurisdiction mileage than I calculated manually. Which number do I use?
Investigate the discrepancy before filing either figure. Cross-reference both against odometer readings and known routes. ELD jurisdiction tracking depends on GPS accuracy and state boundary mapping; manual calculations depend on correctly recording odometer readings at each crossing. The accurate number is whichever is better supported by the underlying evidence — not simply the ELD default.