Invoice Audit Services for Freight: What They Check
What an audit finds depends on the references it is given, and what it recovers depends on who follows each claim to a credit note.
Explainer · 6 min · Alexandre de Perregaux, CEO, Intellyse · Published · Last updated
By Intellyse, makers of freight invoice audit software · About us
Many searches for invoice audit services are about accounts payable in general: someone checks supplier invoices against purchase orders and recovers what was overpaid. Freight works on the same principle, and a service that checks carrier invoices that way will find duplicates and arithmetic slips. What it can miss is the price itself, because a freight invoice is checked against a rate card, a surcharge table and a shipment record, not a purchase order.
What does a freight audit service check?
A freight audit service can check each line of a carrier invoice against the reference that should have priced it: the contracted base rate for the shipment date, the surcharge terms, the weights and dimensions in the shipment record, the Incoterm on the order, and the invoices already received. A line that does not match is held, queried or claimed.
The checks below are the typical ones; which of them a given service runs depends on the data it receives.
Each finding is grounds for a query, not proof of an overcharge; the contract and any tariff incorporated into it decide what was payable.
Surcharges are where a base-rate check runs out. In the invoices audited on our platform since the start of 2026, about 45 per cent of the overpayment value we identified, excluding duplicate imports, came from surcharge lines rather than base freight, spread across 20 carrier accounts. A service that compares only the base rate with the rate card would not have seen close to half of it.
Share of surcharge overpayment identified, by charge type, January to September 2026 (top three: 79%)
- Handling29.5%
- Pickup, delivery and carriage26.2%
- Fuel23.1%
- Demurrage, detention, storage6.4%
- Customs clearance2.2%
- Other, incl. tolls12.6%
Lines billed above the negotiated rate, excluding duplicate imports; grouped by the words in each line's description.
A freight audit is only as good as the reference it checks against.
What does a freight audit service need, and what are you buying?
A freight audit service needs the invoices and the references that priced them: rate cards and contracts with their validity periods, surcharge tables or the tariffs the contract incorporates, shipment data with weights and dates, the Incoterm on each order, and the claim rules and deadlines in each carrier agreement. With invoices alone, it can find duplicates and arithmetic errors but cannot independently verify a contracted rate.
What a service does with a finding varies as much as what it checks. Some return a report of discrepancies; some also file the claim with the carrier; some follow each claim to an outcome and confirm that the credit note arrived. Those are different services, and a proposal should say which one it is.
Pre-payment vs post-payment freight audit: which do invoice auditing services offer?
Freight audits run either before payment or after it, and many services offer both. A pre-payment audit identifies an incorrect invoice before payment, so it can be held, queried or corrected; a post-payment audit reviews invoices already paid and seeks recovery through claims, refunds or credit notes.
These are typical differences, not rules. A post-payment audit can uncover issues that escaped pre-payment checks, particularly when it covers a longer period or runs deeper checks, but every finding then has to travel through a claim. Carrier contracts or applicable tariffs may set deadlines for raising billing disputes, so a finding made after the deadline may be correct and no longer recoverable. Recovery-based pricing, also called a contingency fee, gainshare or success fee, is common in post-payment services, but fixed and subscription models exist too.
Why do audited overcharges go unrecovered?
Because a finding is a list and recovery is a process. An audit report can name every deviation and still recover nothing if no one files the claims, answers the carrier's questions and checks that the credit note arrived.
The gaps are typically between teams. The audit service or the logistics team finds the deviation; carrier claim management sits with whoever holds the carrier relationship; the credit note lands in accounts payable, often against a different invoice number from the one it corrects. A claim that is accepted but never matched to a credit note looks closed in one system and open in another. Fee models add their own blind spot: a share of the amount "identified" or "claimed" is not the same as a share of the amount credited.
These are four different numbers. Ask which one a provider reports as recovery.
What should you ask before signing an invoice audit service?
An invoice audit that stops at the report leaves the expensive part, credit note recovery, to the team that had no time for it in the first place. Our Dispute Agent takes the audit past the finding: each deviation becomes a claim with its evidence attached, and each credit note is matched back to the shipment, so the result is measured in credits received rather than deviations found. To see what an audit of your own invoices would find, we offer a free analysis on 100 shipments.
Free freight audit, 100 shipments
We audit 100 of your shipments and show you the savings.
- You send 100 recent invoices with the matching shipment data and rate agreements, as file exports.
- We check every line against the contracted rates, surcharge terms and shipment data and return the lines that do not match, with the reason for each.
- You see which deviations warrant a claim, and the evidence that goes with each one.
You'll meet Alexandre de PerregauxCEO & Founder, Intellyse
