The IMD Guide
eCommerce fulfilment; a comprehensive guide
Everything growing brands need to know about outsourcing storage, picking, packing and shipping — plus an interactive calculator to estimate what it'll actually cost you each month.
JQ
Jake Quenet
12 min read · Updated May 2026
IN THIS GUIDE
01
The fundamentals
02
When to make the move
03
What it actually costs
04
Choosing a partner
05
UK couriers & delivery
06
Shipping internationally
07
UK rules & regulation
08
Working with IMD
Ecommerce fulfilment is everything that happens between a customer hitting "buy" and the parcel landing on their doorstep — storing your stock, picking and packing each order, and shipping it out. For most growing UK brands it starts as a spare-room job and quickly becomes the bottleneck that holds the business back. This guide explains how ecommerce fulfilment actually works, what it costs, how to choose a 3PL, and the UK-specific details — carriers, customs and regulation — that quietly make or break an operation. There's also a free calculator further down to estimate your monthly cost.
You'll come away knowing what fulfilment actually involves, how 3PL pricing really works, the signals that say "now's the time," and the questions worth asking any provider you're considering.
01 — THE FUNDAMENTALS
Start with the basics
What fulfilment actually is, the lifecycle of an order, and the terms that get used interchangeably — but really shouldn't.
What is ecommerce fulfilment?
Ecommerce fulfilment is everything that happens between "order placed" and "parcel delivered" — receiving stock, storing it, picking the right items when an order comes in, packing them, and shipping them out. It's the operational backbone of any online business. Get it right and customers barely notice. Get it wrong and they don't come back.
THE ORDER LIFECYCLE
01
Stock in
Inventory arrives at the warehouse, gets checked in and logged into the system so every unit is tracked from day one.
02
Storage
Products are organised on the warehouse floor in a way that makes picking fast, accurate, and easy to audit.
03
Order received
Sales channels feed orders straight to the warehouse the moment a customer hits checkout — no manual exports.
04
Pick & pack
Items are picked from shelves, scan-verified for accuracy, and packed to your spec — branded, plain, or custom.
05
Ship
Label generated, courier collects, tracking goes live — typically same-day if the order was placed before 3pm.
06
Returns
Parcels come back, are assessed and processed on receipt, and your live stock count updates automatically.
Terms that get muddled
The fulfilment world has a few terms that get used interchangeably but mean very different things. A clean break:
OFTEN CONFUSED
Warehouse vs. fulfilment centre
A warehouse holds stock. A fulfilment centre actively processes orders — receiving, picking, packing, dispatching, often same-day — and is integrated with your sales channels so everything runs in real time.
OFTEN CONFUSED
Fulfilment vs. shipping
Shipping is one part of fulfilment. Fulfilment is the whole operation — storage, order management, picking, packing, dispatch. When people say "outsourcing fulfilment," they mean all of it, not just the courier leg.
JARGON
What's a 3PL?
Third-party logistics — an outsourced partner that runs your fulfilment for you. You send them stock, they store it and handle every order, so you can focus on growth instead of getting boxes out the door.
In-house vs. outsourced
Most growing brands eventually hit a point where outsourcing becomes the obvious move. The tradeoffs side-by-side:
IN-HOUSE
You run the operation
Full control over every detail of the operation
Significant upfront investment in space, staff and systems
Hard to flex capacity up or down with demand
All overheads sit on your P&L
OUTSOURCED
A 3PL runs it for you
Plug into existing infrastructure and courier rates
Pay only for the capacity you actually use
Scales naturally with order volume
Specialists running it day-to-day
02 — KNOWING WHEN
When to make the move
There's no single threshold for outsourcing, but the signals are usually loud once you know what to listen for.
SIGNS IT'S TIME
You should look at outsourcing if…
•
You're packing orders instead of growing the business.
•
The spare room — or self-managed unit — is overflowing.
•
Shipping costs are high because you have no volume leverage with couriers.
•
Dispatch deadlines slip during peak periods.
•
You're juggling Shopify, Amazon, TikTok Shop and others as separate processes.
Outsourcing doesn't just buy back time — it usually reduces per-order cost once you factor in courier rates, packaging, labour and overheads.
Two terms worth knowing properly
"Pick & pack" and "inventory management" get mentioned a lot. The detail is what separates a smooth operation from one that's quietly losing customers.
CLOSER LOOK
Pick & pack
The live stage of fulfilment — what happens the moment an order lands. In a well-run operation, every pick is barcode-verified to prevent the wrong item going out, and packing is done to your spec: plain brown, branded boxes, or custom inserts. Accuracy here is the single biggest lever for customer trust.
CLOSER LOOK
Inventory management
Knowing exactly what you've got, where it is, and how it's moving. In a fulfilment context: how many units of each SKU sit in the warehouse, what's allocated to open orders, what's dispatched, what's come back via returns. Good inventory data prevents overselling and sharpens every buying decision.
03 — WHAT IT COSTS
How fulfilment pricing actually works
Most 3PLs charge across five lines rather than a single per-order rate. The mix matters — comparing only one fee in isolation is the fastest way to pick the wrong partner.
01
Receiving fees
For booking in and processing new inbound stock — usually charged per pallet or per carton.
02
Storage fees
Charged per pallet, shelf or cubic metre, either weekly or monthly. Usually the biggest fixed line on the bill.
03
Pick & pack fees
Per order, sometimes with an additional per-item charge for multi-line orders. Scales directly with sales volume.
04
Shipping costs
Either passed through at cost using the 3PL's negotiated rates, or built into the per-order price. Volume buys you leverage.
05
Returns handling
A per-return processing fee covering inspection, restocking and any handling required to put the unit back on shelf.
Estimate it for your operation
Pop your carton dimensions and order volumes into the calculator below. You'll see how many pallets you'd need and a rough monthly cost range based on UK industry averages.
Estimates are based on UK industry averages for pallet storage (£3–£6 per pallet per week) and pick & pack (£1.50–£3 per order). Final pricing depends on your SKUs, order profile and service level — get in touch for a tailored quote.
04 — CHOOSING A PARTNER
Choosing an ecommerce fulfilment partner
Once outsourcing makes sense, the next question is who to trust with it. Not all ecommerce fulfilment providers are built the same, and the cheapest per-order rate rarely tells the full story. Here's what actually matters when you're comparing 3PLs.
Questions worth asking any 3PL
What's your pick accuracy, and is it barcode-verified?
What's the same-day dispatch cut-off?
How do you price — and what's not included?
Which sales channels do you integrate with, and how fast?
What visibility do I get?
How quickly can you onboard me?
What happens at peak?
In-house vs. a 3PL
Running fulfilment in-house gives you total control, but it ties up cash in space, staff and systems, and it's hard to flex when orders spike. A third-party logistics (3PL) partner lets you plug into existing infrastructure and negotiated courier rates, pay only for the capacity you use, and scale naturally with volume. For most growing brands, the crossover point comes faster than expected — usually the moment packing orders starts eating the time you should be spending on growth.
05 — UK COURIERS & DELIVERY
UK couriers and delivery: what to expect
Shipping is the part of fulfilment your customer actually sees, so the courier mix matters. A good UK 3PL doesn't rely on one carrier — it rate-shops across several to balance speed, cost and coverage on every order.
The main UK carriers
Royal Mail
Strongest for lightweight parcels and letterbox-friendly items; near-universal UK coverage.
The advantage of outsourcing is leverage: a 3PL ships enough volume to access rates and service levels most individual brands can't, then picks the right carrier per order automatically.
UK delivery speeds
Next-day
The standard expectation for most UK eCommerce now
Standard / economy (2–3 days)
Cheaper, good for lower-value or non-urgent orders.
Named-day and weekend
Useful for subscriptions and premium brands.
Coverage nuances worth knowing
Most of mainland England, Wales and southern Scotland is straightforward next-day territory. The Scottish Highlands & Islands, Northern Ireland, the Channel Islands and the Isle of Man often carry surcharges or longer timescales — and the Channel Islands sit outside UK VAT, so they're treated more like exports. A good fulfilment partner handles these rules for you rather than leaving you to discover them at checkout.
06 — SHIPPING INTERNATIONALLY
Shipping internationally from the UK
The UK is a strong base for selling abroad, but post-Brexit, cross-border orders come with customs and tax steps that domestic shipping doesn't. The mechanics are manageable once they're set up — and a 3PL handles most of the paperwork.
Selling into the EU
Since Brexit, parcels from the UK to the EU are treated as exports and imports. That means customs documentation on every shipment and decisions about who pays import VAT and duty — shipped DDP (Delivered Duty Paid, you cover it for a smoother customer experience) or DAP (Delivered At Place, the customer pays on arrival).
For lower-value orders, schemes like IOSS can simplify EU VAT collection. The detail matters because surprise charges at the door are a leading cause of refused deliveries.
Selling into the US and beyond
The US remains one of the most accessible export markets for UK brands, with a relatively high duty-free threshold on lower-value parcels.
Australia, Canada and the rest of the world each have their own thresholds and documentation.
The practical rule of thumb: once you're shipping consistent volume into a single overseas market, it's worth reviewing whether local fulfilment in that region beats shipping from the UK on cost and delivery speed.
07 — UK RULES & REGULATION
UK fulfilment regulation in plain English
Outsourcing fulfilment doesn't remove your legal responsibilities, but a compliant 3PL takes most of the operational weight. A quick orientation to the rules that touch ecommerce fulfilment in the UK:
VAT:
Once your taxable turnover passes the UK registration threshold you must register for and charge VAT; overseas sellers storing stock in the UK often have to register regardless of turnover. Importing and exporting stock has its own VAT treatment.
EORI number.
You need one to move goods into or out of the UK — essential the moment you import stock or ship internationally.
Fulfilment House Due Diligence Scheme (FHDDS).
UK fulfilment providers that store goods for overseas sellers must be registered with HMRC under FHDDS. If you're an international brand, check your partner is registered.
Consumer Rights Act 2015.
Sets your customers' rights on faulty goods and returns, including the short-term right to reject — which shapes how returns are handled.
Packaging & EPR.
Extended Producer Responsibility rules place obligations on businesses that supply packaging. Specialist categories (food, supplements, cosmetics, age-restricted or hazardous goods) carry extra requirements.
BY THE NUMBERS
What you can expect from IMD Fulfilment
99.98%
Pick accuracy across every order, barcode-verified.
3pm
Same-day dispatch cut-off — orders in by 3pm go out today.
2
UK distribution hubs giving you resilience and capacity.
2003
Year founded — two decades of ecommerce fulfilment experience.
08 — WORKING WITH IMD
Everything else you might be wondering
The practical questions ecommerce brands ask before signing on with a 3PL — grouped by theme.
READY TO MOVE
Stop packing orders. Start growing the business.
Tell us about your operation and we'll come back with an ecommerce fulfilment setup and pricing built around what you actually need — no generic rate card, no surprises.
Trusted by ecommerce brands since 2003 · Two UK distribution hubs
