Amazon FBA vs a 3PL that preps for you: the European trade-offs

If you sell on Amazon in Europe, you have a choice that is easy to miss because Amazon does not advertise it: you can let Amazon hold and ship your stock through FBA, or you can keep your inventory with a third-party provider and have them prep and ship, a decision worth weighing carefully as you plan fulfilment in Europe, because it shapes your costs, your control, and how easily you can sell anywhere else. Neither is simply better; they optimise for different things.

What FBA is good at

Fulfilled by Amazon exists for a reason, and the reason is the Buy Box and Prime. Products in FBA get the Prime badge, which materially affects conversion, and Amazon's own logistics network handles storage, picking, packing, shipping, and a large chunk of customer service and returns. For a seller whose business is mostly or entirely Amazon, that is a lot of operational weight lifted.

FBA also handles the awkward last mile of returns and refunds inside Amazon's own rules, which is genuinely painful to do yourself. If Amazon is your world, FBA is built for you.

Where FBA gets expensive or restrictive

The trade-offs show up as you grow or diversify. FBA storage fees climb steeply for stock that sits, and they spike during the Q4 peak precisely when you are holding the most inventory. Slow-moving SKUs get penalised with long-term storage surcharges. And your stock, once inside Amazon's network, is committed to Amazon: you cannot easily ship a Shopify order from FBA inventory without going through Amazon's more expensive multi-channel fulfilment.

There is also the European wrinkle: managing FBA across multiple European marketplaces means navigating Amazon's various pan-European and country-specific programmes, each with its own VAT registration implications. It is workable, but it is not free of admin, and the VAT obligations are yours regardless.

What a third-party prep model offers

The alternative is to keep your inventory with an independent fulfilment provider that receives your bulk stock, preps it to Amazon's requirements (labelling, poly-bagging, bundling, whatever the category demands) and either forwards prepped units into FBA or ships direct-to-consumer for your Amazon Seller-Fulfilled orders and every other channel from the same pool of stock.

The advantage is that one inventory pool serves everything: Amazon, your own store, other marketplaces. You are not duplicating stock across an FBA silo and a separate warehouse, and you keep control of how and when units flow into Amazon. For a multichannel brand, that consolidation is often the whole argument.

The prep-provider trade-off

It is not free of downsides either. Seller-Fulfilled orders do not automatically get the Prime badge unless you qualify for and maintain Seller-Fulfilled Prime, with its strict delivery-speed requirements. You take on more of the coordination (deciding replenishment timing into FBA, monitoring Amazon's ever-changing prep rules), and if your provider preps a shipment wrong, Amazon can refuse the entire inbound consignment at receiving.

So the provider's Amazon competence matters enormously. A general 3PL that has never sent an FBA shipment will learn on your stock, and Amazon's receiving standards are unforgiving.

How to choose

The decision tends to fall out of two questions.

First, how concentrated is your business on Amazon? If Amazon is 90% of revenue and you value the Prime badge above all, FBA's simplicity is hard to beat. If Amazon is one channel among several, a single prepped inventory pool feeding all of them usually wins on both cost and control.

Second, how comfortable are you managing the operational detail? FBA hides a lot of it; a prep model hands some back to you in exchange for flexibility.

Many established sellers end up doing both: core fast-movers in FBA for the Prime conversion, everything else run through a third-party provider that also handles their other channels. If you go that route, the one capability to insist on is a provider that demonstrably knows Amazon's prep and inbound requirements, because that is where the model quietly succeeds or fails.