LCL vs FCL: what changes in the paperwork
FCL means you have booked a whole container. LCL means your pallets share a container with other people's cargo. The cost comparison is covered in many places. The differences in the documents are not, and that is where the surprises are.
You get a house bill, and that is not optional
An LCL shipment is consolidated by a forwarder or NVOCC. The ocean carrier's master bill names the consolidator, not you. You receive a house bill of lading.
That matters for one main reason: many letters of credit refuse a forwarder's bill. If your credit says so and you are shipping LCL, the presentation is discrepant before you start. Read the credit when it arrives and get it amended. The alternative is shipping FCL for a pallet's worth of cargo.
The VGM is per container, and it is not yours alone
Under SOLAS, a verified gross mass is certified for a packed container. On FCL, that is your container and your certification.
On LCL you have not packed a container. You give the consolidator your cargo weight, and they certify the container. So your job is to give them an accurate figure. If you understate it, their certification is wrong and the container can be refused loading. Your weight, their signature, and everybody is delayed.
Your packing list has to survive being merged
On FCL the packing list describes a container. On LCL it describes your part of one. The consolidator merges it with several others into one consolidated list.
Plan for these consequences:
Marks and numbers are no longer optional. Your pallets go into a container with other people's. If they are not clearly marked, the wrong ones come out at destination.
Per-package detail matters more. A consolidated list is only useful if each line can be traced to a physical package.
Volume becomes a price. LCL is charged on weight or volume, whichever is greater. Your dimensions are now a commercial figure, not just a logistics note.
There is a warehouse in the middle
FCL usually goes from factory to port, port to port, and port to door. LCL goes through a container freight station (CFS) at each end, for deconsolidation, sorting and storage.
That adds documents and charges most people do not budget for: CFS handling at origin and destination, a delivery order at the destination CFS, and sometimes a separate release from the consolidator on top of the carrier's. It also adds days. They are not transit days, but they are real.
The ISF question people get wrong
For ocean cargo bound for the US, one of the ten importer elements is the container stuffing location. On FCL that is your factory or warehouse. On LCL it is the consolidator's CFS. You will not have that address unless you ask for it.
Ask for it when you book, not when the ISF is due. The filing is required 24 hours before loading at the foreign port. Chasing an address across a time zone inside that window is how filings go late.
Choosing
On cost, the crossover point is somewhere around six to ten cubic metres. But the documents should count too. If you are under a letter of credit that refuses forwarder's bills, or your buyer requires a specific transport document, LCL may be the wrong choice whatever the freight quote says.