How do you dispute an LTL freight invoice?
You dispute an LTL freight invoice by comparing the bill line by line against your original quote and bill of lading, documenting the specific charge that does not match, and submitting a written claim to the carrier's claims department within its billing dispute window. Carriers then have 60 days under federal regulation to accept, decline, or settle the claim.
The rest of this guide walks through each step, including exactly what to gather, how to write the dispute so it gets a real review instead of a form-letter denial, and what to expect once you send it. If you already have your evidence together and just need the letter itself, jump to our dispute letter template. LanePilot is a shipper-side rate comparison and invoice audit tool, not a freight broker TMS. It finds the error and drafts the letter; you send it.
Step 1: Confirm there is actually an overcharge
Before you dispute anything, isolate the exact line item that is wrong and why. The most common LTL billing errors fall into a few categories:
- Freight class reclassification: the carrier rebilled at a higher NMFC class than your quote or bill of lading listed.
- Weight discrepancy: a reweigh at the terminal produced a higher billed weight than what you documented at origin.
- Accessorial charges: fees for liftgate, residential delivery, inside delivery, or detention that were not requested or not actually performed.
- Fuel surcharge miscalculation: the wrong index, wrong week, or wrong percentage applied against the linehaul charge.
- Duplicate billing: the same PRO number invoiced more than once, or charges that don't match the rate in your contract or quote.
You need two documents before you can prove any of these: the original invoice (the freight bill itself) and the original quote you booked against. Without both, you're arguing an opinion instead of a documented discrepancy. If you're not sure whether a bill contains an error at all, our guide to auditing an LTL freight invoice walks through the line-by-line comparison first.
Step 2: Know your dispute window
LTL billing disputes run on two different federal clocks, and shippers routinely lose money by assuming only one applies.
The 180-day billing window
49 U.S.C. § 13710(a)(3) gives a motor carrier 180 days from the original bill to issue any additional billed charges, and gives a shipper the same 180 days to contest the original or a subsequent bill. In practice, this is the deadline that matters day to day: most carrier claims departments treat 180 days from the invoice date as the operative window for a shipper-initiated dispute, and will point to it if you file late.
The 18-month legal limit
Separately, 49 U.S.C. § 14705 sets an 18-month statute of limitations for either party to begin a civil action to recover overcharges, with the clock starting on delivery or tender of delivery. This is the outer legal boundary, not a target. If you file a written claim within that period and the carrier disallows it, the deadline to sue is extended six months from the date of that written disallowance.
The practical takeaway: treat 180 days from the invoice date as your real deadline. Waiting for the 18-month limit to approach means relying on litigation rights you likely will never use, and most carriers will simply deny a claim filed that late as untimely under their own billing practices.
Step 3: Gather your documentation
49 CFR § 378.4 requires that an overcharge claim be accompanied by the freight bill itself, plus enough supporting detail for the carrier to investigate the rate, classification, or weight in dispute. Build your claim file with:
- The original invoice/freight bill showing the disputed charge
- The original quote or contracted rate you booked against
- The bill of lading (to confirm class, weight, and accessorials as tendered)
- The delivery receipt (to confirm what was actually performed at delivery)
- Any reweigh certificate, NMFC classification reference, or fuel index screenshot relevant to the specific error
The original invoice and the original quote are non-negotiable. Every dispute, regardless of error type, is ultimately an argument that the bill does not match what you agreed to pay, and you cannot make that argument without both documents in hand.
Step 4: Structure the dispute
A dispute letter that gets taken seriously is specific, not general. Include:
- PRO number and shipment date
- The exact line item disputed (e.g., "fuel surcharge," "liftgate fee," "reweigh reclassification")
- The amount billed versus the amount you believe is correct, with the dollar difference
- The supporting document that proves your figure
- A clear ask: refund or bill correction, by a specific date
Send it to the carrier's claims department specifically, not general billing or your sales rep; claims routed to the wrong desk are a common reason legitimate disputes stall past their window. If you want the exact structure and language to use, our LTL freight dispute letter template has a fill-in-the-blank version built around these same fields.
Step 5: Know what happens after you file
Once a claim is properly filed, 49 CFR § 378.8 requires the carrier to pay, decline, or settle it within 60 days of receipt. If the carrier declines the claim in whole or in part, it must tell you why in writing. If you disagree with that decision, you can escalate, resubmit with additional documentation, or, within your remaining statute of limitations, pursue the matter further. Keep a copy of everything you send and every response you receive; a paper trail is what separates a claim that gets paid from one that gets stalled indefinitely.
A note on what LanePilot does and does not do
LanePilot audits your LTL invoices against your original quotes and contracted rates to flag exactly this kind of discrepancy, and it generates the dispute letter using the details above. LanePilot does not hold a freight brokerage license, so it does not send the letter, negotiate with the carrier, or communicate with the carrier on your behalf; you remain the shipper of record and you file the dispute yourself. If you want to see whether your invoices have these errors before you spend time building a claim by hand, you can run a free audit or read more about how LanePilot works.
Frequently Asked Questions
How long do I have to dispute an LTL freight invoice?
Under 49 U.S.C. 13710, a carrier must bill any additional charges within 180 days of the original bill, and in practice most carriers expect a shipper's dispute within that same 180-day window. Separately, 49 U.S.C. 14705 sets an 18-month deadline for either party to file a civil action to recover overcharges, measured from delivery. File as soon as you spot the error; do not wait for either deadline to approach.
What documents do I need to dispute a freight invoice?
At minimum, the original carrier invoice (freight bill) and your original rate quote or contract. Add the bill of lading, delivery receipt, and any weight or inspection certificate tied to the disputed charge. 49 CFR 378.4 requires the freight bill to accompany any overcharge claim, plus enough detail for the carrier to investigate the rate, classification, or weight in question.
How long does a carrier have to respond to a freight dispute?
Once a claim is properly filed, 49 CFR 378.8 requires the carrier to pay, decline, or settle it within 60 days of receipt. If the carrier declines all or part of the claim, it must explain its reasons in writing.
Can LanePilot dispute the invoice with the carrier for me?
No. LanePilot identifies the overcharge and generates a dispute letter for you to send. LanePilot does not have a brokerage license, so it does not file, send, or negotiate disputes with carriers on a shipper's behalf; you remain the party of record in the dispute.