Choosing a Fulfilment House: 6 Things to Look For Before You Sign

What a Fulfilment House Actually Does

A fulfilment house is a third-party company that handles warehousing and distribution for your business. It stores your products, then picks, packs and ships orders on your behalf. It takes stock in from your supplier, holds inventory on its own premises, and dispatches each parcel when an order comes through your store. Many fulfilment companies also handle post-order tasks such as returns processing, replacements and, in some cases, customer service. In short, it runs the physical side of your supply chain so you can focus on marketing, product and growth.

The terminology trips people up. A fulfilment house and a fulfilment centre describe roughly the same thing, a packing warehouse, but "fulfilment centre" usually refers to an in-house operation while "fulfilment house" tends to mean a company that offers warehousing and packing for others. You will also see the term third-party logistics, or 3PL, used for exactly this service. Spelling matters for search too: UK brands write "fulfilment house" while the American spelling, "fulfillment house" or "fulfillment center", is more common in the US. They all describe the same type of service.

There are also different types of fulfilment house to be aware of. Some focus on business-to-consumer parcels, some on business-to-business and bulk distribution, and some specialise by product type or by the number of SKUs they manage. The benefits of choosing the right type early are lower costs, cleaner inventory management and fewer problems as you scale.

This is a large and growing market. The UK third-party logistics sector is worth around £22 billion a year, and online retail now accounts for roughly 28% of all UK sales by value. As more brands scale past the point where packing orders from a spare room or back office is viable, outsourced fulfilment has become a standard part of the ecommerce operating model rather than a luxury reserved for big retailers.

When Outsourcing Fulfilment Makes Sense, and When It Does Not

Before you shortlist a single provider, work out whether a fulfilment house is right for your business at all. Outsourcing is not automatically cheaper, and for some brands it is the wrong move.

Fulfilment houses quote based on how many orders you send each month and how many items sit in an average order. If you ship a high volume of low-value items, the per-order and per-item charges can eat straight through your margin. The same is true if you run on very thin margins to begin with. In those cases, keeping fulfilment in-house or renegotiating your product mix often makes more sense than paying a third party to lose you money on every parcel.

Outsourcing tends to pay off when your order volume is steady and growing, when fulfilment is stealing time you should be spending on the business, or when your own storage and dispatch cannot keep up with demand around peak periods. If you are spending evenings packing boxes instead of planning campaigns, that is usually the signal. The decision is rarely only about cost. It is about what your time is worth and whether a specialist can dispatch more reliably than you can.

One more consideration for Shopify brands: your fulfilment partner becomes part of your customer experience. A late or badly packed order reflects on your brand, not theirs. That is why the six factors below weigh service and technology as heavily as price.

1. The Real Cost, Not the Headline Rate

The single biggest mistake brands make is comparing providers on the pick-and-pack rate alone. Outsourced fulfilment comes with a stack of fees, some obvious and some buried in the contract, and the cheapest headline rate is often the most expensive provider once everything is added up.

Here are the charges to map out before you compare quotes:

• Set-up fees: Most fulfilment houses charge to onboard your business and configure their systems for your products. This is fair, because the work is real, but check the number is reasonable and not padded.
• Order processing and pick-and-pack fees: Usually a base cost per order plus a charge for each additional item packed. This is where high-volume, low-value senders get caught out.
• Storage fees: Charged by pallet, shelf or cubic space your stock occupies. Bulky products cost more, so do not warehouse more than you need.
• Returns fees: If the provider processes returns and refunds, you pay per return. A generous returns policy can quietly build a large bill.
• Minimum fees: Many providers set a monthly minimum to make your account profitable for them. Smaller brands can end up paying for orders they never sent.

Ask every shortlisted provider for a full fee schedule and model it against your actual order data, not a rounded estimate. A good partner will also pass on shipping savings. Fulfilment houses buy packaging and carrier services at wholesale volumes, and some share those discounts with you while others keep the margin. That difference alone can outweigh a slightly higher pick-and-pack rate, so factor it in before you decide.

2. Shopify Integration and Technology

This is the factor generic fulfilment guides skim over, and it is the one that causes the most pain for Shopify brands. Your fulfilment house has to talk to your store cleanly and in real time. If it does not, you inherit overselling, stock discrepancies and manual order exports that defeat the point of outsourcing in the first place.

It is worth knowing that Shopify's own Fulfilment Network operates only in the United States, so UK merchants rely on independent 3PL companies that integrate directly with Shopify. When you assess a provider's technology, look for a native Shopify app or a direct API integration rather than a spreadsheet workaround. The features that matter are real-time inventory management and stock sync, automated order routing the moment a customer checks out, and order tracking pushed straight back into Shopify so status and notification emails stay accurate. The better providers run a warehouse management system, or WMS, that connects to Shopify through a proper integration rather than a nightly file transfer, so automation does the heavy lifting instead of your team.

Ask how quickly stock levels update between the warehouse and your storefront, and what happens during a flash sale when hundreds of orders land at once. Ask whether the provider supports branded packaging, custom inserts and any subscription or bundle logic your store uses, because not every 3PL system handles these well. Across the Shopify Plus stores we have built, the brands that scale smoothly are the ones whose fulfilment partner behaves like an extension of their tech stack, not a disconnected warehouse you email at the end of the day.

Good visibility is part of this too. The better providers give you a live dashboard showing inventory, order status and dispatch performance, so you can see how efficiently the operation is running and are never guessing whether an order went out. That kind of tracking and reporting is what turns a warehouse into a genuine logistics partner. If a provider cannot show you that during the sales process, assume you will be in the dark once you sign.

3. Location, Delivery Speed and Carrier Network

Where a fulfilment house sits on the map affects two things: how fast your customers receive orders, and how easily you can visit the site. Both matter more than they first appear.

A warehouse close to major transport links and carrier hubs can be the difference between next-day and two-day delivery. With customer expectations set by the largest retailers, delivery speed is now a genuine competitive factor rather than a nice-to-have. Ask which carriers the provider works with, whether they offer next-day and weekend options, and how they handle international shipping if you sell abroad. A provider with a strong carrier network and negotiated rates gives you faster, cheaper delivery than you could arrange alone.

Proximity helps in a second way. Being able to visit the warehouse lets you inspect the operation, meet the team and discuss changes to your requirements face to face. If you cannot get there easily, at least ask for recent photos and a video walk-through. A provider that welcomes a site visit is usually one that has nothing to hide.

If your growth plans include selling into the EU, raise cross-border logistics early. Rules such as the EU General Product Safety Regulation now require many consumer goods to have a responsible person based inside the EU, and your fulfilment strategy needs to account for that rather than treat it as an afterthought.

4. FHDDS and VAT Compliance

This is the factor almost every fulfilment guide ignores, and for UK brands it is not optional. The Fulfilment House Due Diligence Scheme, or FHDDS, is an HMRC scheme that regulates businesses storing goods in the UK on behalf of overseas sellers. It exists to stop imported goods being sold without the correct VAT being paid.

If you use a fulfilment house that stores imported goods for sellers based outside the UK, that provider must be registered and approved by HMRC. Trading as an unapproved fulfilment business carries a £10,000 penalty and a criminal conviction, and HMRC keeps a public list of approved businesses so overseas traders can check compliance. Late registration alone can trigger penalties of up to £500 a month, capped at £3,000, and approved providers face further fines if they fail to carry out due diligence on their customers or keep the required records for six years.

What does this mean when you are choosing a provider? Ask directly whether they are FHDDS registered where the scheme applies to their business, and whether they can evidence it. A provider that treats compliance casually is a risk to your brand, because problems at the warehouse can disrupt your stock and your ability to trade. If you import your own stock, or work with overseas suppliers, get clear on where the VAT and due-diligence obligations sit before you sign anything. When in doubt, take proper advice, as VAT rules are detailed and the penalties are real.

5. Facilities, Security and Staff

You are handing a large part of your business to another company's building and people, so the quality of both should weigh heavily on your decision. It is easy to be impressed by a slick website and forget to ask what actually happens behind it.

Start with the basics of the warehouse itself. Is it clean, organised and appropriate for your products? Climate-controlled space matters for anything sensitive, and dock-high loading matters for volume. Then look at security. A serious fulfilment house commits to tight security to protect your stock from both external theft and internal loss, so ask what measures are in place and how stock is tracked and reconciled.

Staff quality is just as important and easy to overlook. Ask how the team is trained, whether you get a dedicated account manager, and how they handle mistakes when they happen, because they will. Good account management is what keeps the operation running smoothly through peaks. The best fulfilment companies assign an account manager who learns your business and stays with you, rather than routing you through a general support queue. That relationship is often what separates a partner you keep for years from one you leave within months.

6. Reviews, References and Service Quality

A fulfilment house delivering a genuinely good service will have customers willing to say so. Reviews and references are your window into what the day-to-day relationship is actually like, beyond the sales pitch.

Look for reviews and testimonials on the provider's own site, but do not stop there, since a company will always showcase its best feedback. Search for independent reviews, and ask the provider directly for references from brands similar to yours in size and product type. A short conversation with an existing customer will tell you more about responsiveness, accuracy and how the provider handles peak periods than any brochure.

When you speak to references, ask specific questions. How accurate is their pick-and-pack? How quickly do issues get resolved? What happens when volumes spike? How transparent is the billing? The answers reveal whether the provider treats smaller clients as valued customers or as afterthoughts. Reliability and clear communication are the traits that matter most once the contract is signed, and they are exactly what past customers can confirm.

Running a Fulfilment House Selection Process

Pulling the six factors together, a sensible selection process looks like this. First, confirm that outsourcing suits your order volume, item value and margins. Then build a shortlist of three or four providers and send each the same brief: your monthly order volume, average items per order, product dimensions, storage needs and sales channels.

Ask every provider for a full fee schedule, a demonstration of their Shopify integration, evidence of FHDDS compliance where relevant, and two references. Model each quote against your real order data, visit the sites you can reach, and speak to the references before you decide. Weight your scoring towards technology and service, not just price, because the cheapest provider on paper is rarely the cheapest once poor integration, weak inventory management and slow service start costing you sales. A partner that improves your efficiency and delivery speed usually earns back a higher rate several times over.

Fulfilment is one of the few decisions that touches cost, customer experience and compliance all at once. Taking the time to assess it properly protects your margin and your brand. If you would like help connecting a fulfilment partner cleanly to your Shopify store, or planning the warehousing and operations side of a scaling ecommerce business, our Shopify Plus agency team can help. Get in touch to talk it through.