What Is a 3PL? A Plain-English Guide for Small Brands
By Nathan McClintock · · Last updated · 7 min read

A third-party logistics provider, usually shortened to 3PL, stores your stock and prepares customer orders for dispatch on your behalf. For a small online brand in Northern Ireland, it can mean keeping control of your business without spending every evening surrounded by parcels.

What does third-party logistics actually mean?
The phrase sounds more complicated than the job. You are the seller, your customer is the buyer, and a separate business handles the physical work between an order being placed and a parcel being handed to a courier.
That separate business is the third party. In an e-commerce setting, its work usually covers receiving stock, storing products, picking items, packing orders and arranging dispatch. Returns may also be included as a separately charged service.
I run Pack & Post NI in Belfast. Before this, I worked as an Evri and DHL Express courier driver. My role now is on the fulfilment side: helping online sellers get orders packed and ready for delivery.
You still decide what to sell, set your prices and look after your customers. Outsourcing fulfilment does not mean handing over your whole shop.
What a 3PL does day to day
The work starts before the first customer parcel leaves. Your products arrive as a stock delivery, and the receiving process should establish what has actually been delivered. Clear product names, quantities and references help prevent mistakes later.
Stock then needs a sensible home. Similar-looking products should be easy to distinguish, particularly when a skincare range has several sizes or a clothing brand carries colour and size variations.
When an order is ready for fulfilment, the required items are picked from storage. They are checked against the order and packed into suitable packaging. The shipping label is prepared, and the parcel is handed over for delivery.
Imagine a County Down accessories brand selling a scarf on its own and a scarf-and-hat bundle. The important detail is not just finding the right colours: it is knowing that the bundle requires two separate items. Good product information makes that instruction clear.
Before starting, agree how orders reach the fulfilment provider, how stock changes are recorded and what happens when something is missing. Do not assume every provider handles these tasks in the same way. My how it works page is a useful starting point for that conversation.
A 3PL is not the same as a courier
A courier carries the parcel. A fulfilment provider gets the parcel ready to travel. Those jobs connect, but they are not interchangeable.
If your orders are still sitting unpacked on the kitchen table, booking a courier does not solve the picking and packing problem. Equally, outsourcing your packing does not remove the need to pay for delivery.
| Option | Main job | What you still need to consider |
|---|---|---|
| Courier | Transport a prepared parcel | Stock storage, picking and packing |
| Independent 3PL | Store stock and prepare orders for dispatch | Delivery charges and agreed service scope |
| Amazon FBA | Fulfil eligible orders within Amazon's programme | Amazon's rules, fees and stock requirements |
At Pack & Post NI, I use Royal Mail, Evri and DPD, and ship to Northern Ireland, Great Britain and the Republic of Ireland. The suitable service depends on the parcel and destination. My courier comparison explains what to consider rather than treating every shipment as identical.
How is it different from Amazon FBA?
Fulfilment by Amazon is Amazon's fulfilment programme. You send stock into its network, and fulfilment follows the programme's requirements. An independent 3PL is a separate provider whose service and charges you agree directly.
FBA can suit a business built around Amazon. An independent provider may suit a brand that wants to discuss its own packaging instructions, product bundles and sales channels directly with the person handling fulfilment.
Neither option should be chosen on its name alone. Check which orders can be handled, what packaging is allowed, how returns work and what happens if you want stock sent back. Amazon's current fees and requirements need checking directly; they are not the same as my rate card.
For a Belfast maker selling mainly through their own website, the first question is practical: which arrangement fits the orders they actually receive?
When does a small NI brand need a 3PL?
There is no universal order count that makes outsourcing sensible. A simple single-item shop and a gift business with personalised instructions can have very different workloads at the same sales volume.
Look at what packing is displacing. Are you missing time for product development? Is stock taking over a spare room? Are you postponing marketing because the evening has disappeared into printing labels?
A hypothetical Newtownards homeware seller might manage ordinary weeks comfortably but struggle when a product launch lands alongside their day job. Outsourcing could help, but only if the agreed process suits fragile products and the business can afford the full cost.
The opposite can also be true. If orders are occasional, storage is easy and you enjoy packing, keeping it in-house may be sensible. My guide to signs it is time to stop packing orders yourself helps you assess the workload rather than chase an arbitrary threshold.
What does it cost at Pack & Post NI?
My charges are separated so you can see what the work involves. All prices below are excluding VAT.
| Cost line | Pack & Post NI rate |
|---|---|
| Onboarding | £150 one-off |
| Pick and pack | £2.00 per order, including a box or mailer |
| Additional items | 25p per extra item in an order |
| Storage | £8 per shelf per month |
| Goods in | £15 per delivery |
| Shipping labels | Discounted courier rate plus 50p per label |
| Returns | £1.50 per item |
| Gift wrap or inserts | From 30p |
There is no subscription and no minimums. That does not mean fulfilment is free in a quiet month: storage or other applicable charges still need accounting for.
As a simple illustration, picking and packing a single-item order costs £2.00 before its shipping label. An order containing three items costs £2.50 for picking and packing: the base charge plus two additional items.
Postage is separate because the courier service, destination and parcel details matter. Storage, incoming deliveries and returns also affect your overall bill. Read the full cost breakdown alongside the pricing page before comparing options.
How to choose a provider without guessing
Start with a description of your actual business. Include product dimensions, typical items per order, monthly order volume, delivery destinations and any unusual packing instructions. Photos can help explain products that are awkward to describe.
Ask what the quote includes and what triggers extra charges. A low headline picking fee is not enough if you do not understand storage, goods in, labels and returns.
Then walk through exceptions. What happens if an order arrives with an unclear address? How should a damaged incoming item be handled? Who decides whether a returned product can go back into stock? These details matter as much as a straightforward dispatch.
For NI brands, explain whether customers are in NI, GB, ROI or a mixture. Ask what product and destination information is needed before shipping, rather than assuming every route has identical requirements.
Finally, agree how to prepare the first stock delivery and how to move stock out if the arrangement ends. You can request a quote with your product and order details, or check the FAQ before deciding what to ask.
FAQ
Is a 3PL only for large businesses?
No. The important questions are whether the service fits your products and whether the complete cost makes sense. At Pack & Post NI, there are no minimums, so you do not need to reach a fixed order threshold to ask about fulfilment.
Do I still own my stock?
Outsourcing fulfilment is not selling your products to the provider. You remain the seller. Before sending anything, confirm the storage terms, stock records, access arrangements and process for getting products returned to you.
Does the picking fee include postage?
No. My £2.00 picking and packing fee includes a box or mailer, not delivery. Labels are charged at the discounted courier rate plus 50p, and other applicable charges are separate. All prices are excluding VAT.
Can a 3PL handle customer returns?
Returns can form part of the arrangement. My rate is £1.50 per item. Agree what should happen after receipt, including how you want returned products assessed and whether they should be restocked, held aside or sent back to you.
Looking for hands-on support? Explore our 3PL in Northern Ireland service for storage, packing and shipping from Belfast.

