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Freight audit and payment: what it is, what it checks, in-house or outsourced
Updated September 11, 2026 · 4 min read
In short
Freight audit and payment is the process of checking every carrier or broker invoice against what was agreed before paying it, then paying it and recording where the cost belongs. The audit checks the rate and fuel against the contract or rate confirmation, each accessorial against its authorization and support, the class and weight on LTL bills, duplicates, and the proof of delivery. Shippers with heavy volume outsource it to freight audit and payment companies that charge per invoice or a percentage of spend; smaller shippers and most brokerages do it in-house, where the work is gathering documents rather than checking them.
Freight invoices are wrong more often than most invoices. Rates depend on contracts with lane exceptions, fuel is a calculation two parties do separately, accessorials appear after the fact with or without support, and LTL bills get reweighed at terminals. Freight audit and payment, FAP in the trade, is the discipline of catching that before the money moves.
The two audits
Pre-audit happens before payment: the invoice is checked, errors are disputed or short-paid, and only the correct amount goes out. Post-audit happens after: a specialist reviews paid invoices, often on a contingency fee, and recovers overpayments from carriers. Post-audit exists because pre-audit is imperfect; a shipper that does neither is paying a few percent more for freight than it agreed to.
What the audit checks
| Check | Against | Common error |
|---|---|---|
| Linehaul | Contract rate for the lane, or the rate confirmation | Wrong lane, wrong tariff, spot rate billed on a contract lane |
| Fuel surcharge | The contract’s index, base and week | Different week or base, fuel billed on an all-in rate |
| Accessorials | Authorization on the rate confirmation or contract; support (times, receipts, dispatch records) | Unauthorized detention, lumper without receipt, stop-off not on the tender |
| Class and weight (LTL) | The BOL and the carrier’s inspection certificate | Reclassification without an inspection, reweigh on a wrapped pallet |
| Duplicates | Prior invoices by load, PRO and invoice number | Same load billed twice under different invoice numbers, factor resubmissions |
| Proof of delivery | The signed POD on file | Missing, unsigned, wrong load, exceptions not raised |
| Remit-to | The carrier’s file or a factor’s notice of assignment | Changed bank details on an otherwise normal invoice |
Most invoices pass. The ones that fail cluster in accessorials and fuel, which is where the money is.
Payment and allocation
After the audit, the invoice is approved, paid on terms, and coded: which cost center, which customer order, which lane, which mode. For a shipper, that coding is what makes freight spend reportable: cost per hundredweight by lane, carrier performance, accessorials as a share of spend. For a brokerage, the equivalent is margin per load: what the shipper paid, what the carrier was paid, and the accessorials that did or did not get passed through.
Outsourced: freight audit and payment companies
At high volume, shippers hand the whole flow to a FAP provider. Carriers send invoices to the provider; the provider audits against the shipper’s contracts and shipment data, disputes errors, pays carriers from the shipper’s account, and delivers reporting. Fees run per invoice, commonly around a dollar or two, or a fraction of a percent of spend, sometimes with a share of recovered overcharges. The value at volume is real: consistent audit rules, carrier disputes handled by people who do only that, and freight data clean enough to analyze.
The trade-offs are the ones of any outsourcing: the provider’s rules are only as good as the contract data it was given, disputes with strategic carriers are handled by a third party, and the shipper’s own team stops seeing the invoices.
In-house: what actually takes the time
Smaller shippers and nearly all brokerages audit in-house. The checks are easy; a clerk can run all seven in a minute when the documents are in front of them. What takes the afternoon is getting the documents in front of them: the rate confirmation is in the TMS, the POD is in an email from a driver’s phone, the lumper receipt is a photo, the invoice is a PDF, and the four have to be matched to the same load before any comparison can start.
That is why in-house audit is a document problem before it is an accounting problem, and why the tools that help are the ones that read the documents and attach them to the load automatically. Once the invoice, the rate confirmation and the POD are data on the same record, the audit is a comparison a system makes, and the person looks only at the ones that fail. The guide on auditing a carrier invoice walks through the checks; LogiPilot Docs reads the documents, and a custom build runs the comparison against a shipper contract or a TMS.
For brokers: the audit that points outward
A brokerage’s second audit is of its own invoices to shippers. Every accessorial a carrier billed and the broker paid has to appear on the broker’s invoice to the shipper, with the support, before the shipper’s cutoff, or the broker absorbs it. Detention notices sent late, lumper receipts left in a driver’s phone and TONU fees never claimed are, for most small brokerages, a larger leak than carrier overbilling. The detention calculator and the proof of delivery template exist for that half of the problem.
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