Billing errors in freight brokerage are not occasional anomalies. They are a recurring feature of an industry where invoices are generated at volume, accessorial charges are added in transit without pre-authorization, and LTL carriers routinely inspect and re-rate shipments after the fact. For a broker operating at volume, unaudited carrier invoices mean a slow bleed on margin that is easy to miss until you're looking at a profitability problem you can't explain.
Where Carrier Invoices Go Wrong
Understanding the most common error types lets you build an efficient review process that catches the most expensive problems first.
Fuel surcharge miscalculation is the single most frequent billing error in truckload freight. Most carriers calculate FSC using a published index (commonly the weekly DOE national diesel retail price) combined with a carrier-specific surcharge table. Errors occur when:
- The carrier applies the wrong week's fuel price index
- The FSC table applied to your load does not match the table referenced in your contract or rate confirmation
- The carrier charges a percentage of base rate when the confirmation specifies a per-mile FSC
- The carrier updates their FSC table without notifying brokers, and the new table doesn't match what was quoted
On a $1,200 truckload, a 2–3% FSC error is $24–$36. Across 200 loads per month, that's $4,800–$7,200 in potential overcharges — entirely from one error type.
Unauthorized accessorial charges are added to invoices for services that may or may not have occurred, or occurred but were not agreed to in the rate confirmation. Common examples:
| Accessorial | What It Is | Typical Cost |
|---|---|---|
| Liftgate delivery | Carrier-provided liftgate at delivery when shipper has a dock | $75–$150 |
| Residential delivery | Applied when delivery is to a residence | $50–$175 |
| Redelivery | Second delivery attempt when receiver unavailable | $100–$250 |
| Detention | Carrier wait time beyond free time at pickup or delivery | $50–$100/hour |
| Layover | Driver held overnight due to receiver unavailability | $200–$400 |
| Inside delivery | Moving freight beyond the tailgate | $50–$200 |
The dispute is not always whether the service occurred — it's whether it was authorized in the rate confirmation or agreed to in transit. A liftgate charge on a load delivered to a dock-equipped warehouse is straightforwardly wrong. A detention charge where the driver genuinely waited 4 hours at pickup is legitimate but needs to be documented.
LTL reweigh and reclassification is the most contentious category in less-than-truckload billing. When an LTL carrier receives freight, they may inspect it — checking actual weight against the BOL weight and determining whether the freight class description on the BOL matches the actual commodity and density. If the carrier disagrees with the BOL, they issue a revised invoice.
The revised invoice can be significant: reclassification from Class 85 to Class 150 can nearly double the freight charge. Weight and inspection (W&I) adjustments are the largest single category of LTL billing disputes.
Rate confirmation vs. invoice discrepancies occur when the carrier invoices a lane or zip code differently than the rate confirmation states — either through data entry error or because the carrier's system populated the lane from their own rate table rather than the agreed rate confirmation. Always verify that the invoiced origin, destination, and mileage match the confirmation.
Duplicate invoices are less common but occur, particularly when invoices are submitted via email and then again through a carrier portal, or when a carrier resubmits after a payment was delayed.
The Invoice Review Process
A structured invoice review has a logical sequence that prioritizes the highest-probability errors:
Step 1: Match to rate confirmation. Pull the signed rate confirmation for the load. Confirm that the carrier on the invoice matches the carrier on the confirmation, the load number matches, and the origin and destination match.
Step 2: Verify the base rate. The invoiced base rate (linehaul) should match the rate confirmation exactly. Any discrepancy requires explanation before payment.
Step 3: Audit the fuel surcharge. Identify which FSC table is being applied. Look up the applicable week's DOE fuel price. Verify that the carrier's FSC table produces the FSC percentage on the invoice. Flag any discrepancy.
Step 4: Review accessorials line by line. For every accessorial on the invoice, ask: Was this in the rate confirmation? If not, was it authorized in transit and documented? If neither, it is a dispute candidate.
Step 5: For LTL, review for W&I adjustments. Any LTL invoice that is higher than the quoted amount should be reviewed for reweigh or reclassification charges. Request the carrier's inspection report if a W&I adjustment appears.
Disputing a Carrier Invoice
The dispute process has a sequence that affects your leverage:
Dispute before payment. Your negotiating position is stronger when you haven't paid yet. If you've already paid and are seeking a refund, the carrier has your money and the urgency is on your side, not theirs.
Document in writing. A phone call is not a dispute. An email or written notice citing the specific charge, the applicable rate confirmation, and your basis for disputing it creates a paper trail. Reference the load number, date, and exact dollar amount in dispute.
Reference your rate confirmation. A signed rate confirmation is a binding agreement. If the carrier agreed to move the load for $1,100 all-in and the invoice is $1,275 due to accessorials that weren't authorized, your rate confirmation is the document that proves the discrepancy.
Know the dispute window. Most carrier contracts specify a window — typically 60–180 days from invoice date — within which disputes must be filed. Missing this window can be treated as acceptance of the charge. Build your invoice review process around the shortest dispute window in your carrier agreements.
Technology and High-Volume Operations
At lower volumes (under 150–200 loads/month), manual invoice review with a structured checklist is practical. As volume grows, TMS invoice matching — where the TMS compares carrier invoices against rate confirmations and flags discrepancies automatically — reduces the labor required and catches errors that manual review might miss.
Third-party freight audit services exist for high-volume operations and brokers who handle a significant LTL mix. These services charge a percentage of recovered overcharges and can be cost-effective when LTL volume is high enough that W&I disputes are frequent.
Frequently Asked Questions
What is a freight weight inspection and when does it happen?
A weight and inspection (W&I) occurs when an LTL carrier physically examines freight after pickup — weighing the shipment and verifying that the freight class description on the BOL matches the actual commodity and its density. Carriers perform W&I when they have reason to believe the BOL is understated, or as part of routine quality control processes. The carrier issues a revised invoice if their inspection differs from the original BOL. You can contest a W&I by requesting the inspection report and, if appropriate, hiring an independent inspector to counter-measure the freight.
How do I dispute a carrier accessorial charge?
Identify whether the accessorial was authorized: either on the original rate confirmation or documented in a written exchange during transit. If neither, write a dispute notice referencing the load number, the specific charge, the rate confirmation that does not include that charge, and your request for credit. Send it to the carrier's billing department and keep a copy. Follow up in writing if you don't receive a response within 10 business days.
What is the fuel surcharge and how is it calculated?
A fuel surcharge (FSC) is a separate line item that carriers add to compensate for diesel fuel cost above a baseline level. Most carriers reference the weekly DOE national diesel retail price and apply a published surcharge table that increases incrementally as fuel price rises. The FSC is typically expressed as a percentage of the base linehaul charge or as a per-mile rate. Because fuel prices fluctuate weekly, the applicable FSC changes on a regular cycle — which is why applying the wrong week's index is a common billing error.
How long do I have to dispute a freight invoice?
Dispute windows vary by carrier contract and state law, but common windows are 60 days, 90 days, or 180 days from the invoice date. Some carrier agreements specify that paying an invoice constitutes acceptance of all charges — meaning you lose dispute rights the moment you pay. Read the payment terms in your carrier agreements and build your invoice review cadence around the tightest window in your carrier pool. Waiting until you receive a collection notice to start reviewing invoices means your window may already be closed.
What's the most common source of billing errors on LTL shipments?
Reweigh and reclassification adjustments are the most frequent and most expensive source of LTL billing errors. When a carrier disputes your BOL weight or freight class, the revised invoice can be substantially higher than the original quote. The best prevention is accurate BOL preparation: weigh freight before shipping, classify it correctly based on NMFC guidelines, and describe it precisely. When W&I adjustments appear, request the carrier's documentation and review it critically — errors in carrier inspection do occur and can be successfully disputed with proper documentation.