LTL freight pricing often combines a rate per hundredweight (CWT), freight class, discounts, fuel and accessorial charges. But small shipments can produce a surprising result: even when the calculated linehaul is low, the carrier may apply a minimum charge that becomes the billing floor.
Understanding that floor is important when comparing small LTL shipments with parcel, consolidation or other modes.
What CWT means
CWT means “per hundredweight,” or per 100 pounds. A simplified planning calculation is:
Base linehaul = shipment weight ÷ 100 × applicable CWT rate
Real LTL tariffs are more complex because the applicable rate depends on origin, destination, freight class, weight break, contract discount and other terms.
How the minimum charge works
If the discounted linehaul calculation falls below the carrier’s applicable minimum charge, the minimum can replace the lower calculated amount.
| Scenario | Calculated linehaul | Minimum charge | Planning base |
|---|---|---|---|
| Small shipment | $92 | $135 | $135 |
| Larger shipment | $210 | $135 | $210 |
This example is illustrative. Actual minimums and tariff logic vary by carrier and agreement.
Why cost per pound can look worse on small LTL
A 300-pound shipment billed at a $150 minimum effectively carries $0.50 per pound of base transportation before fuel and accessorials. A 900-pound shipment billed at $270 carries $0.30 per pound. The larger shipment benefits from spreading the floor and fixed handling economics across more weight.
Freight class still matters
The minimum charge does not make freight class irrelevant. Class, density and commodity rules still affect the underlying rate and whether reclassification charges appear later. Use the Freight Density Calculator before requesting an LTL quote, then review Freight Class vs Density.
Do not stop at linehaul
A useful LTL quote comparison includes:
- discounted linehaul or minimum charge,
- fuel surcharge,
- liftgate, residential or limited-access services,
- appointment or inside-delivery charges,
- reweigh/reclassification exposure.
See LTL Accessorial Charges Explained for the broader fee stack.
When consolidation can help
If several small shipments repeatedly hit a minimum charge, consolidating compatible orders into a heavier shipment may improve the transportation cost per unit. The tradeoff is inventory timing, handling and destination requirements.
Use the Freight Cost Per Unit Calculator to compare shipment-size scenarios.
Frequently asked questions
Does every LTL carrier use the same minimum charge?
No. Minimums vary by carrier, lane, tariff and negotiated account.
Is CWT the final freight bill?
No. CWT is one rating component. Fuel, accessorials and corrections can change the final invoice.
Can a discount reduce the minimum charge?
Contract terms determine how discounts and minimums interact. Ask the carrier or broker for the applicable minimum after discounts.
Sources
PackToolbox guides are built around stated formulas, practical examples and source checks for changeable carrier, freight and logistics rules. Calculators are planning aids; final requirements should be verified with the relevant carrier or service provider.