Multi-Channel Fulfillment vs a 3PL: when each one costs you less

Multi-Channel Fulfillment (MCF) lets you ship orders from Amazon's warehouses to buyers on other platforms — your own site, eBay, Etsy, wherever. You pay per order, and Amazon handles the pick, pack, and ship. MCF pricing is higher than FBA outbound because Amazon is not earning its cut from a marketplace sale on that transaction.

A 3PL (third-party logistics provider) stores your inventory in their own warehouse, and ships orders to wherever you send them. The pricing is usually a monthly storage fee plus a per-order pick-and-pack fee plus shipping charges.

When MCF makes sense

Low volume, say under 100 orders a month from non-Amazon channels. At that volume, the 3PL setup costs — software integration, initial inventory transfer, negotiated rates — often exceed the per-order savings. MCF charges more per order but costs nothing to set up, and you already have the inventory sitting in Amazon's warehouse.

Small and light products also favor MCF. A small standard-size item might cost $5 to $6 through MCF. Through a 3PL, the storage and pick fee are lower but the shipping label cost is roughly the same, so the savings are small.

When a 3PL wins

Higher volume, above roughly 300 non-Amazon orders a month, starts shifting the math. The 3PL's per-order fee is lower than MCF's, and you can negotiate shipping rates. The savings show up first on heavier items — oversize products where the dimensional weight charge dominates.

Multi-channel sellers who use FBA for Amazon and a 3PL for everything else often keep a small inventory split to avoid the worst of both cost structures. It is more work but the per-unit cost is lower on both sides.

The hidden variable

MCF draws from the same inventory pool that serves your Amazon orders. If a non-Amazon channel pops a large order during a stockout window, Amazon may have already shipped that unit to a Prime customer. Splitting your inventory — a few weeks of Amazon stock at FBA, the rest at a 3PL — gives you a buffer without holding too much extra in Amazon's expensive storage.