What LTL invoice overcharges hide in the fine print?
Four turn up most often on an unchecked LTL invoice: a reweigh billing more pounds than declared, a reclassification billing a higher freight class than booked, accessorial charges for services never requested, and a base rate or fuel surcharge that does not match the original quote. Each is checkable in minutes with the invoice next to the quote.
None of these require a carrier acting in bad faith. Reweighs happen, density rules changed, and accessorial codes get applied by whoever is closest to the freight that day. The problem is not that these charges exist, it is that almost nobody checks them before paying. Here is exactly what to look at for each one.
1. The reweigh
The carrier weighs the freight at the terminal and bills a heavier weight than what you declared on the bill of lading. A reweigh by itself is not the problem. Carriers are entitled to correct an inaccurate declared weight, and terminal scales exist for that reason. The problem is a reweigh billed with nothing behind it.
How to check it: ask the carrier for the reweigh certificate or scale ticket tied to that PRO number. A legitimate reweigh has a certified weight, a date, and a terminal location on file. If the invoice shows a higher weight and there is no certificate to produce, or the certificate does not match the shipment date, that charge is disputable on documentation grounds alone.
2. The reclassification
The invoiced freight class is higher than the class you booked. This one has gotten more common since the National Motor Freight Traffic Association moved LTL classification from a commodity-based system to a density-based one, a shift that took effect with NMFTA Docket 2025-1 in July 2025 and tightened further under Docket 2026-1 in February 2026. Density, not commodity type, now sets the class for most freight, and a terminal remeasurement can produce a different number than what you calculated at booking.
How to check it: recalculate density yourself. Density in pounds per cubic foot is actual weight divided by cubic volume, using the same measurement method the NMFTA classification standard uses. Compare your figure to the class the carrier billed. If the invoice shows a higher class and there is no inspection report, photo, or dimension record behind it, the reclass is worth disputing. Keep your own dimension records at booking so you have something to compare against later; that single habit is what makes this check possible at all.
3. Accessorials you never authorized
Liftgate, residential delivery, inside delivery, detention, redelivery. Each is a legitimate charge when the service actually happened, and each gets billed in error often enough to be worth checking every time. Carrier accessorial tariffs list these as separate line items on top of the base linehaul rate, and none of them require your sign-off before they land on the bill.
How to check it: match every accessorial line to something on your bill of lading or delivery receipt. A liftgate charge needs a liftgate request or a delivery receipt noting one was used. A residential fee needs an actual residential address, not a commercial building the carrier's system misclassified. Detention needs timestamps that support the billed hours. No matching entry on either document means no basis for the charge. We cover this check in more depth, including the full list of accessorial types and how carriers apply them, in why was I charged an accessorial fee.
4. The rate and fuel surcharge mismatch
The base rate or fuel surcharge on the invoice does not match your quote or your contracted rate. This is the most purely clerical of the four. There is no judgment call, no measurement to redo, just two numbers that either agree or do not.
How to check it: line the invoice up against your original quote or rate confirmation. The base rate should reflect the rate per hundredweight you were quoted, applied to the correct billed weight. The fuel surcharge is a percentage tied to a published index, most commonly the U.S. EIA weekly diesel index, mapped to the carrier's surcharge table for the week of your shipment. If the percentage on the invoice does not match what the carrier published for that week, or the base rate ignores your negotiated discount, the mismatch is disputable and it is the easiest of the four to prove.
What you need to run this check
All four checks run on the same two documents: the original quote (or rate confirmation) and the invoice, with the bill of lading and delivery receipt as backup for the accessorial and weight checks. No software is required to catch any single one of these on a single shipment. Our complete guide to running a freight bill audit walks through the full four-document process end to end if you want the longer version.
The part that is hard is not any individual check, it is doing all four on every invoice, every time. Ten minutes per shipment is manageable until the shipment count climbs, and that is exactly where these four overcharges are built to survive: they are small enough per invoice to not be worth the fight, and consistent enough across volume to add up anyway.
The deadline that makes checking worth it
Under 49 U.S.C. § 13710, you have 180 days from the invoice date to contest a bill, or you lose the right to. The same clock runs against the carrier for billing you additional charges, but it is your responsibility to catch what you were overbilled inside that window; nobody sends a reminder. Once you file a documented claim, 49 CFR § 378.8 requires the carrier to pay, decline, or settle it within 60 days and explain any denial in writing, and 49 CFR § 378.4 requires the freight bill to accompany the claim, and allows, though does not strictly require, supporting rate, class, or weight detail that helps the carrier investigate it.
How LanePilot helps once you find one
LanePilot is a shipper freight platform built for shippers who do not have a TMS or a dedicated freight team. Invoice audit and recovery is the part it is best known for: it runs these same four checks against every delivered shipment automatically, using the original quote and shipment record it already has, and drafts a dispute letter with the documentation a carrier's claims department needs to investigate it. LanePilot does not send, file, or negotiate the claim with the carrier. You remain the party of record and file it yourself. If you want to see what an audit finds on a real shipment, run a free audit with your invoice and original quote, or read how LanePilot works.
Frequently Asked Questions
What are the most common LTL invoice overcharges?
Four show up most often: a reweigh that bills a heavier weight than declared, a reclassification that bills a higher freight class than booked, accessorial charges like liftgate or residential delivery that were never requested, and a base rate or fuel surcharge that does not match the original quote or contract.
How do I check an LTL invoice for overcharges without software?
Put the invoice next to the original quote, bill of lading, and delivery receipt. Compare the billed weight and class to what was declared, match every accessorial line to a service on the delivery receipt, and check the base rate and fuel surcharge against your contract. Any line without matching paperwork is disputable.
What proof do I need to dispute a reweigh or reclassification charge?
For a reweigh, ask the carrier for the reweigh certificate or scale ticket; no ticket on file is grounds to question the charge. For a reclassification, recalculate density yourself (weight in pounds divided by cubic feet) and compare it to the class the carrier billed; a mismatch with no inspection report backing it up is disputable.