A lumper fee is a charge to the warehouse or carrier when a shipper or reciever use a third-party worker to help load or unload the contents of a shipping container. Lumpers are often used in 3PL’s (third party logistics providers). Lumpers are needed so that the regular warehouse staff and the truck driver are not stuck with the burden of unloading containers.
Warehouses outsource this type of work to lumpers as a way to save time and money. Lumpers are specialized in one thing and they do it vary well. Typically a lumper will be twice as fast as a normal warehouse worker to unload a container.