Freight Bill Audit: How to Recover Overcharges

Here's an uncomfortable truth: a meaningful slice of freight invoices contain errors, and they rarely break in your favor. A freight bill audit is the discipline of catching those errors and recovering the money. This guide covers what it is, what it finds, and how to run one.

What a freight bill audit is

A freight audit reviews your invoices line by line against two things: your contracted rates and the actual shipment details. Anywhere the invoice doesn't match, that's a flag — and a potential recovery. It applies across modes: LTL, full truckload, drayage, and parcel.

Why the errors persist

It isn't usually fraud — it's volume. Your accounts-payable team pays hundreds of invoices a month, typically by invoice number, with no time to compare each one to the contract and the shipment. So the discrepancies sail through. Auditing is boring, detailed work, which is exactly why most companies never get to it — and exactly why the money sits there.

The errors a freight audit catches

• Duplicate invoices billed under slightly different reference numbers.
• Incorrect fuel surcharges that don't match the published index.
• Unauthorized accessorials — detention, liftgate, residential — that were never agreed to.
• Rate discrepancies where the carrier billed an old or default tariff instead of your contract. This is the most common and most recoverable error.
• Weight and reclass errors that bump freight into a higher class or bracket.
• Money-back service failures never claimed.

How the audit process works

1. Review

Pull the invoices and compare each against contracted rates and actual shipment details.

2. Flag

Document every discrepancy — what was billed, what should have been billed, and the difference.

3. Dispute

Package the evidence and file the claim with the carrier, so you're not chasing it yourself.

4. Recover

Credits and refunds come back to you — and the process gets tuned so the same errors stop recurring.

Pre-audit vs. post-audit

A pre-audit reviews invoices before payment, so you never pay the error in the first place. A post-audit looks back over invoices already paid to recover overcharges. Both have a place: pre-audit prevents leakage going forward, post-audit recovers what already leaked. Many importers start with a post-audit look-back to prove the value, then move to ongoing pre-audit.

How much can you recover?

It varies by carrier mix and volume, but for most shippers moving steady freight across multiple carriers and accessorials, the recovery plus the ongoing savings comfortably outweighs the cost of the audit. The more carriers and the more accessorials, the more there is to find.

How it fits your AP process

A good audit works alongside accounts payable, not around it. Invoices get reviewed and discrepancies flagged with clean documentation; your team stays in control of approvals. Often the audit can be structured on a recovery basis — if nothing is found and recovered, you don't pay.

Nobody at broker scale owns freight-audit content well, which means most importers don't even know what they're leaving on the table. See how BRS runs a freight audit, or if parcel is your bigger spend, read the parcel audit guide.