What it is
Standardized commodity classification
Every freight commodity has an NMFC code that maps to a freight class based on density, handling, stowability, and liability.
Freight Glossary
NMFC Code
NMFC (National Motor Freight Classification) codes are a standardized system for categorizing freight commodities used by LTL carriers to determine pricing. Every commodity type has an assigned NMFC code and corresponding freight class (50 through 500) based on four characteristics: density, handling difficulty, stowability, and liability. The NMFC system is maintained by the National Motor Freight Traffic Association (NMFTA) and is the basis for virtually all LTL pricing in the United States.
Why it matters
Using the wrong NMFC code is the most common cause of freight reclassification charges. When a carrier inspects a shipment and determines the actual NMFC code differs from what the shipper declared, they reclassify the shipment to the correct code and bill the shipper for the rate difference, plus a reclassification fee. On a single shipment, reclass charges can add $100 to $500 or more. For shippers moving consistent LTL volume, using correct NMFC codes from the start eliminates this entirely preventable cost.
When to use it
Look up the NMFC code for every commodity before filling out a bill of lading for an LTL shipment. The code determines your freight class, which directly affects your rate. If your product does not have an obvious NMFC code, use the NMFC tariff database or contact your carrier for classification guidance. When shipping multiple commodity types on one BOL, each line item needs its own NMFC code and freight class.
How Warp thinks about it
Warp simplifies NMFC classification by offering a freight class calculator that determines the correct code based on your product description, weight, and dimensions. For shippers using per-pallet pricing through Warp, the NMFC code complexity is reduced because pricing is based on the pallet rather than commodity classification. This eliminates reclassification risk entirely on Warp-managed shipments.
NMFC Codes
NMFC codes classify freight commodities and determine LTL pricing.
Why accuracy matters
Wrong code = reclass charges
Carriers inspect shipments and reclassify when the declared code is wrong. Reclass fees add $100-500+ per shipment.
Warp solution
Per-pallet pricing bypasses classification
Warp per-pallet pricing eliminates freight class risk by pricing on the pallet rather than commodity code.