LTL reweigh and reclass: why it happens and how to dispute it

You quoted a pallet at one price and the invoice came back higher, with a line that says “reweigh,” “reclass” or “inspection correction.” That is the carrier telling you the freight on its dock did not match your bill of lading. Sometimes the carrier is right. Sometimes it is not. Here is how to tell the difference, how to dispute a bad one and how to stop them from happening.

By Ryan Poynter, SVP of LTL, Armstrong Transport Group · Updated September 24, 2026

What a reweigh and a reclass are

LTL carriers bill from the bill of lading, then verify it. When the verification does not match, the carrier corrects the bill and re-rates the shipment:

• Reweigh: the carrier’s scale shows more weight than the BOL. The shipment is re-rated at the actual weight, which can also move it into a different weight break.
• Reclass: the carrier decides the freight belongs in a different (almost always higher) freight class. That happens because the measured density is lower than you declared, or because the commodity description matches an NMFC item with its own class.
• Re-description or dimension correction: the carrier changes the commodity or the dimensions on the bill. Often this is what drives the reclass.

The carrier’s tariff, which your BOL incorporates, gives it the right to inspect and correct. Some carriers also charge an inspection fee on top of the re-rated freight. That amount varies by carrier tariff, and it is worth reading because it is often the line shippers never saw coming.

What triggers them

Dimensioning machines

Many LTL terminals now run freight through automated dimensioners, overhead camera or laser systems that capture length, width and height as a forklift drives a pallet through. They measure every shipment that passes, not a random sample, so a BOL with guessed dimensions gets caught far more often than it used to. Dimensioners measure the outermost points, so an overhanging carton or a crooked top layer counts as the full cube.

Certified scales

Forklift scales and floor scales at the dock weigh freight as it moves. A pallet declared at a round number like 500 lb that actually weighs 580 lb gets flagged.

Manual inspections

Inspectors open or examine freight when the description looks wrong for the class, the density does not match the commodity, or a shipper has a history of corrections. A BOL that says “FAK” or “parts” on freight that is obviously furniture is an invitation.

The 2025 density scale made accuracy matter more

Since the NMFTA’s 13-tier density-based scale took effect on July 19, 2025, many more commodities are classed by density rather than by a fixed item class. That makes your dimensions part of the price. A few inches of height can move the estimated density-based freight class a full step. Commodities with their own item-specific classes still get reclassed if the description does not match the NMFC item.

Worked example: how a few inches become a reclass

A shipper books one pallet as 48″ × 40″ × 48″ at 600 lb. The carrier’s dimensioner reads 72″ tall (the product was stacked higher than the usual build), and the scale reads 620 lb.

The weight went up 20 lb, but the height did most of the damage: 50% more cube cut the density from 11.3 to 7.8 lb/ft³ and moved the shipment two class steps. To see what that kind of move is worth, look at what 500–999 lb shipments paid across Armstrong’s network: the median for Class 70–92.5 was $350, while Class 100–125 was $400, about $50 (14%) more. Add an inspection fee and the corrected invoice can land well above the quote.

Class bands are medians of all-in rates Armstrong customers paid on 500–999 lb shipments, including fuel and any accessorials, September 2025 – August 2026. They show how class moves price across many lanes, not the re-rate on any single shipment.

If the carrier’s reading is accurate, the correction is valid. If the pallet really was 48″ and the dimensioner caught a forklift mast or a loose sheet of stretch wrap, it is worth disputing.

How to spot a correction on your invoice

Corrections do not always come labeled clearly. Put the carrier’s invoice next to your BOL and quote, and check these lines:

• Weight: does the billed weight match the BOL? A higher number means a reweigh.
• Class or NMFC item: a different class, or a different NMFC item number, means a reclass or re-description.
• Dimensions or cube: new dimensions or a cubic-feet figure you did not provide point to a dimensioner reading.
• Extra line items: look for “inspection,” “correction,” “W&I” or “re-rate” charges.
• Fuel surcharge: fuel is a percentage of the linehaul charge, so a re-rated base also raises fuel. Make sure it was recalculated on the corrected amount, not added twice.
• Discount: the corrected rate should still carry your contract or quoted discount. A re-rate at an undiscounted tariff is an error worth catching.

If you ship regularly, track corrections by product and by carrier. A pattern on one SKU usually means the standard pallet build or the listed dimensions are off. A pattern on one carrier or terminal may mean a miscalibrated dimensioner, and that is a conversation worth having with the carrier directly.

The inspection certificate: your key piece of evidence

When a carrier corrects a bill, it should be able to back it up with an inspection record, usually called a W&I (weight and inspection) certificate or inspection report. Always ask for it. A useful certificate shows:

• The PRO number, date, terminal and inspector or device that took the reading
• The measured dimensions of each handling unit and the reweighed weight
• Photos or dimensioner images showing the freight being measured
• The commodity description and NMFC item the carrier applied, and why
• The scale or device identifier, and ideally its certification or calibration date

If the carrier cannot produce an inspection record, or the record is for a different piece count than you shipped, you have a strong basis to ask for the original rate.

How to dispute a reweigh or reclass

1. Act quickly. Carrier tariffs often ask for billing disputes within a set window, and federal law generally gives you 180 days from receiving a bill to contest it (49 U.S.C. § 13710). Don’t sit on the invoice.
2. Request the inspection certificate and photos for the PRO number.
3. Pull your own evidence: your scale ticket or scale printout, photos of the finished pallet with a tape measure visible, the signed BOL and the packing list. Product spec sheets help show unit weight and carton sizes.
4. Compare the details. Does the piece count match? Are the dimensions plausible for your product and pallet? Did the dimensioner read an overhang you know did not exist? Is the NMFC item the carrier applied actually your commodity?
5. Check the math. Recalculate cube, density and class from the carrier’s own numbers using the freight density calculator. Errors in the re-rate itself are more common than you would expect.
6. Write a short, specific dispute. PRO number, what was corrected, why it is wrong, and the evidence attached. Ask for the original rate to be restored and any inspection fee removed.
7. Pay what is undisputed and follow up in writing until you get a decision. If you ship through a 3PL, send it to them; they handle these with the carrier every day.

Not sure whether an invoice is right? Upload the invoice and BOL to the free LTL invoice auditor. It checks for added weight, reclasses and extra accessorials line by line.

How to prevent reweighs and reclasses

• Weigh every shipment on a scale, pallet included. Estimates and round numbers are what get caught.
• Measure after wrapping, at the widest and tallest points, rounded up to the next inch.
• Build tight pallets. No overhang, a flat top and wrap pulled tight. Dimensioners read the outermost point of the load.
• Describe the commodity accurately and use the right NMFC item. Vague descriptions draw inspections.
• Put dimensions on the BOL for every handling unit, not just a total weight.
• Keep a record. A photo of each pallet at the dock and a scale printout take a minute and win most disputes.
• Standardize repeat shipments. If you ship the same product often, document a standard pallet build with known dimensions and weight.

The freight class guide explains how density and NMFC items interact, and how LTL rates are calculated shows where weight and class enter the price.