Glossary · Trucking Operations
Freight Class (NMFC).
NMFC-designated freight classification (50–500) that determines LTL pricing based on density, value, fragility, handling difficulty, and stowability.
What it is
Freight class is the National Motor Freight Classification (NMFC) classification number assigned to LTL freight. Classes range from 50 (densest, easiest to handle, cheapest) to 500 (lightest, most fragile, most expensive). The class is determined by four factors: density (pounds per cubic foot), stowability (how easily it stows alongside other freight), handling (whether it needs special handling), and liability (value, fragility, theft risk).
LTL carriers — FedEx Freight, Old Dominion (ODFL), XPO, Saia, Estes — price by freight class. A pallet of dense industrial parts might be class 70; a pallet of unboxed exercise equipment might be class 250; a pallet of high-value, fragile electronics could be class 400. Classification disputes are common: shippers sometimes misclassify freight (intentionally or not) to reduce cost, and the LTL carrier re-rates on inspection, producing a back-charge to the shipper or broker.
Full-truckload freight does not use freight class — it's an LTL-specific concept. FTL pricing is by lane and weight, not NMFC class.
Why it matters for trucking finance
For carriers operating in LTL — hot-shot operators, regional pup-trailer fleets, expedited LTL — freight class drives pricing. Knowing the standard NMFC classifications on common commodities (electronics, machinery parts, palletized retail) helps in quoting accurately and avoiding re-rate disputes.
Misclassified freight produces re-rate charges on the carrier-shipper invoice, which become a billing-cycle problem and slow down payment. For full-truckload owner-operators, freight class is largely irrelevant — the entire trailer goes for a single rate. Some intermodal containers on certain lanes also use class-based pricing, so drayage operators occasionally need to track NMFC as well.
Related terms
- Less-Than-Truckload (LTL) — Freight model where carriers consolidate multiple shippers' loads into a single trailer; loads are typically 100–10,000 lbs and below truckload.
- Full Truckload (FTL) — Freight that fills an entire trailer for a single shipper, typically over 10,000 lbs or by volume; the standard model for OTR carriers.
- Accessorial Charges — Additional fees on a freight bill beyond the base line-haul rate — detention, lumper, layover, fuel surcharge, tolls, etc.
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