What is an Amazon prep centre?

What actually happens to your stock

Goods arrive at the prep centre from wherever you bought them: a wholesaler's pallet, a supermarket clearance haul, or a container from overseas. The centre books the delivery in and counts it against your manifest, which is the first place discrepancies get caught - short shipments and supplier errors surface here rather than after Amazon has already received a shipment that does not match.

Each unit is then inspected. Damaged, expired or mislabelled stock gets pulled before it can damage your account health. Good prep centres photograph problems and send them to you rather than quietly binning or shipping them.

Next comes the prep itself. Every unit gets an FNSKU label. Depending on category, it may also need a poly bag with a suffocation warning, bubble wrap, a bundle assembly, an expiry date sticker, or a plain outer box to hide supplier branding. Amazon's requirements are specific and the penalties for getting them wrong - from unfulfillable inventory to account warnings - are why this work exists as a service at all.

Finally the centre builds the shipment plan in Seller Central, palletises or boxes the goods, books the carrier and sends the stock into the fulfilment centres Amazon nominates.

Prep centre, 3PL or fulfilment centre?

The terms get used loosely. A pure prep centre preps and forwards into Amazon; the stock is only ever passing through. A 3PL stores your inventory long-term and ships individual orders directly to customers on your behalf. A fulfilment centre is usually the same thing as a 3PL, and Amazon's own warehouses are also called fulfilment centres, which muddies the language further.

In practice most UK providers do both. Many of the companies in this directory will prep for FBA, hold buffer stock, and also pick and pack direct-to-consumer orders for your Shopify or eBay channels. If you only need one of those services, say so when you ask for a quote - you should not be paying for warehouse space you are not using.

When outsourcing starts to make sense

Prepping at home is entirely reasonable at low volume. A few dozen units a week, simple products, spare room to work in - the per-unit fee is hard to justify against your own labour when your time is not yet the constraint.

The tipping point usually arrives for one of four reasons. Volume outgrows your space. You start importing, and need a UK address that can receive a container. Your time becomes worth more than the fee, which happens faster than most sellers expect once sourcing and account management fill the day. Or you want to travel, and stock cannot sit in a hallway waiting for you.

There is also a compliance argument. A centre that preps thousands of units a week knows Amazon's current requirements better than a seller reading the help pages occasionally. That expertise has real value the first time it stops a shipment being rejected.

What it costs

Across the centres listed in this directory, standard per-unit prep runs from roughly £0.10 to £0.60. The lowest published rates cluster around £0.10 to £0.13 per unit and are almost always tied to high monthly volume; small-volume tiers typically sit between £0.40 and £0.60.

The per-unit rate is rarely the whole bill. Poly bagging, bundling, pallet storage, box forwarding and removal order handling are commonly priced separately. Compare complete quotes on a realistic month of your own volume rather than headline rates.