Fuel Card Audit Checklist: What to Check Every Month

Knowing what a fleet audit is doesn't tell you what to actually check each month. This is the practical version: a checklist for auditing fuel card activity, whatever card or cards your fleet uses.

Before You Start: What You Need

• Fuel card transaction data for the period, from your card provider(s) or a platform like Fleevo.
• A current vehicle assignment list: which card belongs to which vehicle or driver.
• Telematics or mileage data, where available.
• Last period's flagged items, to confirm they were actually resolved.

The Checklist

1. Match every transaction to an assigned vehicle. Any transaction on a card with no matching vehicle, or a vehicle that shouldn't have been on the road that day, needs an answer.
2. Check fuel type against vehicle spec. Diesel on a petrol vehicle, or vice versa, is either a data error or a real problem.
3. Compare volume purchased to tank capacity. A fill that exceeds the vehicle's tank size, or two full fills in one day, is worth investigating.
4. Check location against the vehicle's route or telematics position. Fuel bought somewhere the vehicle wasn't is one of the clearest fraud signals available.
5. Look for same-card, same-day, multiple-vehicle activity. This is the clearest sign of fuel card sharing or misuse.
6. Review MPG against the vehicle's historical average. A sudden drop can point to fuel theft or a mechanical issue; either way, it needs checking.
7. Reconcile total spend against invoiced totals. Card provider invoices and your own transaction log should match; gaps point to missing or duplicate data.
8. Follow up on every item flagged last period. An audit that doesn't close the loop on prior findings isn't actually catching anything.

How Often to Run It

Monthly is the minimum for most fleets. Run it weekly for larger fleets, or for any fleet that has recently changed fuel card provider, driver roster, or vehicle assignments.

How Fleevo Automates This Checklist

Fleevo runs every item on this checklist automatically and continuously, not once a month: matching transactions to vehicles, checking fuel type and volume against vehicle spec, cross-referencing location against telematics data, and flagging same-card multi-vehicle activity as it happens. What used to be a manual monthly review becomes a live, always-on audit. Explore Fuel & EV Charge Management, read what a fleet audit is, or see the fuel fraud patterns we see most often across fleets.

Fuel Card Audit FAQs

How often should you audit fuel cards?

Monthly at minimum. Larger fleets, or any fleet that has recently changed fuel card provider, driver roster, or vehicle assignments, should audit weekly until things settle.

What's the single biggest red flag in a fuel card audit?

Fuel purchased somewhere the vehicle's telematics shows it wasn't. Location mismatches are harder to explain away than volume or timing anomalies.

Can a fuel card audit be automated?

Yes. Platforms like Fleevo run these checks continuously against every transaction rather than as a periodic manual review, catching issues as they happen instead of a month later.