How to choose a fulfilment warehouse in the UK

To choose a fulfilment warehouse in the UK, start with what you sell and how many orders you send, then shortlist two or three providers that handle products like yours. Compare their full price per order (not just the headline pick fee), their daily dispatch cut-off and couriers, how they connect to your shop, and how they handle returns. Ask for references, read the contract notice period, and start with a small amount of stock before you move everything.

Here’s how to work through it without getting caught out.

What a fulfilment warehouse does

A fulfilment warehouse, often called a 3PL (third-party logistics provider), stores your stock and sends your orders for you. A typical setup looks like this:

1. 1You (or your supplier) send stock to the warehouse. They check it in and put it on shelves.
2. 2A customer orders on your shop. The order is passed to the warehouse automatically.
3. 3The warehouse picks, packs and hands the parcel to a courier.
4. 4Tracking details come back to your shop, and the customer is told it’s on its way.
5. 5Returns go back to the warehouse, which checks them and tells you what came back.

Do you need one yet?

Packing orders yourself is fine at the start, and teaches you a lot about your products and customers. A warehouse usually starts to make sense when:

• Packing takes hours a day that you’d rather spend on growing the shop.
• Your home or unit is running out of space.
• You want later dispatch cut-offs or next-day delivery that you can’t manage yourself.
• You want to go on holiday without the shop stopping.

If you send only a handful of orders a week, check each provider’s minimums first. Some don’t take very small shops, and some charge a monthly minimum.

Understand how pricing works

Warehouse pricing has several parts, and the headline “pick and pack from” price is only one of them. Ask for a full price list covering:

Onboarding or setup

A one-off fee to set up your account and connect your shop.

Goods in (receiving)

Charged per pallet, carton or hour when your stock arrives.

Storage

Charged per pallet, shelf, bin or cubic metre, usually per week or month.

Pick and pack

Per order, often with an extra charge for each additional item.

Packaging

Boxes, mailers and void fill, unless you supply your own.

Postage

The courier cost, which may be at the warehouse’s rates or your own account.

Returns handling

Per return, for opening, checking and restocking.

Extras

Inserts, gift wrap, kitting (making bundles), labelling and stock counts.

Questions to ask every warehouse

Use the same questions for each shortlisted provider so you can compare like with like.

• What’s your daily cut-off for same-day dispatch? A later cut-off means you can promise faster delivery.
• Which couriers do you use, and can I offer next-day and Saturday services?
• How does my shop connect to you? Check they work with your platform, and that tracking numbers come back automatically.
• How quickly is stock checked in after it arrives? Slow receiving can leave you showing items as out of stock.
• How do you handle returns? Who checks them, how fast, and how do you report what came back and in what condition?
• What happens when you make a mistake? Ask how picking errors and lost or damaged stock are handled and who pays.
• What insurance covers my stock while it’s with you?
• Can you handle my products? Fragile, heavy, high-value, dated (with best-before or batch numbers) or regulated items need specific experience.
• Can you send abroad? If you sell to Ireland, the EU or the US, ask how they handle customs paperwork.
• What’s the contract length and notice period? And how do I get my stock back if I leave?

Location matters, but less than you’d think

The UK is small enough that most well-run warehouses can reach most of the mainland next day with the right courier. Location matters more for:

• Your own visits, if you want to check stock or packing in person.
• Where your stock arrives from, such as a port or your supplier.
• Collection times: a site near a courier hub may get later collections.
• Highlands, islands and Northern Ireland, where delivery times and costs can differ.

Check how it connects to your shop

The connection between your shop and the warehouse is where many problems start. A good connection should:

• Send paid orders over automatically, without you copying them.
• Hold back orders that need checking, such as ones flagged for fraud.
• Pass the delivery service the customer chose, such as next-day.
• Send tracking back so customers get a dispatch email.
• Keep stock levels in sync, so you don’t sell what isn’t there.

With Merchella, paid orders go to your warehouse automatically (Zendbox in the UK, or any warehouse that connects the way it would to WooCommerce), and tracking comes back so the customer is emailed.

Get references and see it for yourself

Ask for two or three current customers with products similar to yours, and actually call them. Good questions:

• How often do orders go out wrong?
• When something goes wrong, how quickly is it fixed?
• Have prices gone up since you joined, and by how much?
• Is it easy to reach a real person?

If you can, visit the warehouse. A tidy, well-labelled floor and staff who can explain their process are good signs.

Start small

1. 1Send a small amount of stock of a few products first.
2. 2Place test orders to friends or to yourself, including a next-day one.
3. 3Check the packing, the speed and that tracking comes back to your shop.
4. 4Send a return back and see how it’s reported.
5. 5Once you’re happy, move the rest of your stock.

Signs it’s time to switch

• Orders regularly go out late or wrong.
• Stock counts don’t match what you sent in.
• Returns sit unprocessed for weeks.
• You can’t get a straight answer when there’s a problem.

If you do switch, plan it like a move: stop sending stock to the old site, run both for a short overlap, and do a full stock count when everything arrives at the new one.

In short

Shortlist warehouses that handle products like yours, ask each to price your real orders, and compare cut-off times, couriers, the shop connection and returns handling. Call their references, check the contract terms, and test with a small amount of stock before moving everything.