National Motor Freight Classification

Published on: September 11, 2025

If you’re booking freight shipments or working with carriers, the term National Motor Freight Classification has probably come up. It’s one of those things that plays a big part in how your shipment gets priced and moved.

Here’s a quick look at what it means and why it matters.

What Is the National Motor Freight Classification?

The National Motor Freight Classification is a standard used to categorize commodities for less-than-truckload (LTL) shipping. It assigns each product a class based on density, handling, liability, and stowability.

This system helps carriers apply fair and consistent pricing when goods of different types share the same truck.

Why This Classification Matters

Getting the right classification affects more than just paperwork. If the class is wrong, you might face reclassification fees, delays, or even refused pickups.

Using the correct freight class makes it easier to:

  1. Get accurate quotes
  2. Avoid billing disputes
  3. Ensure smooth transit and delivery
  4. Keep things consistent across carriers

Understanding National Motor Freight Classification Codes

Each product is assigned a code that fits into one of 18 freight classes, ranging from Class 50 to Class 500. These codes are used by carriers to calculate rates and check if the cargo fits their service guidelines.

For example, heavier, more compact items usually fall into lower classes (which cost less), while lighter or bulkier items go into higher classes.

Using a National Motor Freight Classification Lookup

To figure out the correct freight class, many businesses use a National Motor Freight Classification lookup tool. These tools help you search for your product, review its attributes, and identify the right code. Some lookup tools are available online, while others require an NMFC subscription.

Having the correct info upfront can help you avoid surprises on the invoice.

Final Thoughts

The National Motor Freight Classification helps bring structure to LTL shipping and avoids confusion across shippers, carriers, and customers.

At Newl, we make sure our clients use the right classifications, get accurate quotes, and avoid unexpected fees. Whether you’re shipping pallets or cartons, we’ve got you covered from pickup to delivery.

Frequently Asked Questions

1. Does every carrier follow the National Motor Freight Classification?

Most LTL carriers in North America use it, but some may have their own internal rules or exceptions for specific goods.

2. Can a shipment have multiple classifications?

Yes, if the shipment contains different types of products, each item may be assigned its own class and code.

3. How often is the classification system updated?

The NMFTA updates it regularly to reflect changes in products, shipping practices, and industry standards.