3PL Fulfilment Costs Explained: What UK eCommerce Brands Need to Know

Understanding what 3PL fulfilment costs is one of the most common questions growing eCommerce brands ask before outsourcing their logistics. It is also one of the hardest to answer simply, because no two fulfilment providers structure their pricing the same way.

This guide breaks down every component of a typical 3PL quote, explains the pricing models you will encounter, highlights the hidden costs that catch brands out, and gives you a practical framework for comparing providers on a like-for-like basis.

Why fulfilment costs are difficult to compare

A 3PL quote is never a single number. It is a collection of separate charges, each tied to a different part of the fulfilment process. One provider might show a competitive pick fee but recover margin through packaging. Another might include goods-in for free but charge monthly minimums that make low-volume months expensive.

This is why two quotes for the same business can look similar on the surface but produce very different monthly invoices once orders start flowing. The goal is not to find the cheapest line item, it is to understand the total cost of fulfilment across your real order volumes and mix.

The core components of a 3PL fulfilment quote

Most UK 3PL providers charge across five main categories. Understanding each one is the foundation for reading any quote accurately.

1. Goods-in and receiving

This covers the cost of unloading your stock when it arrives at the warehouse, checking it against delivery notes, scanning each unit, and logging it into the warehouse management system. Charges typically apply per pallet, per unit, or per man-hour. Some providers include goods-in as part of onboarding; others bill it every time stock arrives.

2. Storage

Storage is the ongoing cost of holding your inventory, based on the space it occupies and the time it sits there. Common models include charging per pallet, per bin, or per cubic metre. Storage costs vary significantly by warehouse location, facilities in the Southeast carry higher rates than those in the Midlands, and can fluctuate seasonally, particularly in Q4.

Some providers charge daily storage rates, which can be more cost-effective for fast-moving inventory. Others charge monthly regardless of how long stock sits in a location.

3. Pick and pack

Pick and pack is typically the largest ongoing line on your fulfilment invoice. It covers the labour of locating each item, assembling the order, packing it, and preparing it for dispatch. Rates are usually charged per order and can increase with additional items, special packaging requirements, or personalisation.

This is the component where accuracy matters most. A pick and pack accuracy rate of 99.9% is the industry benchmark to look for, errors in this stage create returns, refunds, and damaged customer relationships.

4. Packaging materials

Boxes, mailers, void fill, tissue paper, tape, and labels are sometimes included in the pick and pack rate, sometimes billed separately. If you use branded or custom packaging, this will almost always be an additional cost. Ensure you understand exactly what your provider includes in their base rate before comparing.

5. Shipping and courier costs

Courier costs are charged separately from the fulfilment fee and passed through at the rates negotiated between your 3PL and its carrier partners. This is where volume leverage matters significantly. High-volume 3PLs access preferential carrier rates that individual brands cannot negotiate independently, which is one of the core economic arguments for outsourcing fulfilment in the first place.

Dimensional weight pricing and fuel surcharges apply regardless of provider, but the base carrier rate can vary considerably depending on who your 3PL ships with and how much volume they move.

The three main 3PL pricing models

Variable (pay-as-you-go)

You pay for the services you actually use each month. If order volumes drop, your invoice drops with them. If volumes spike, costs scale proportionally. This is the most common model for growing eCommerce brands because it removes the risk of paying for capacity you are not using. At SCEND, we operate a transparent pay-as-you-go structure with no hidden charges, no setup fees, and no minimum order volumes or minimum terms.

Fixed pricing

A set monthly fee regardless of order volume. This can work for businesses with highly predictable, consistent order volumes, but most growing brands find it inflexible and end up paying for fulfilment capacity they have not used in slower months.

Tiered pricing

Rates decrease as volumes increase, incentivising growth. Common in larger 3PL operations, though the tier thresholds and rate changes vary significantly by provider and are worth modelling against your actual projected volumes before committing.

Hidden costs to watch for

These are the charges that do not always appear prominently in a quote but can materially affect your total monthly cost.

Monthly minimums. Some providers guarantee themselves a baseline revenue level regardless of your actual order volume. If your volumes are seasonal or you are in an early growth phase, this can make low months disproportionately expensive.

Setup and onboarding fees. One-time fees for integrating your eCommerce platforms, configuring SKUs in the warehouse management system, and completing the initial receiving process. Always ask whether these are included.

Returns processing. Returns management is a separate service in most 3PL agreements. Understand what is included, receipt, quality inspection, grading, restocking, and disposal, and how each stage is charged.

Peak surcharges. Many providers apply surcharges during Q4 and peak trading periods such as Black Friday. Ask for the peak rate structure upfront so it does not arrive as a surprise on your November invoice.

Carrier surcharges. Fuel surcharges, remote area fees, and dimensional weight adjustments are applied by carriers and passed through by your 3PL. These are largely outside your provider's control but worth understanding in your cost model.

Contract exit terms. Not a cost per se, but a financial risk. Minimum contract terms, notice periods, and exit clauses all affect how quickly you can move if the relationship is not working.

What determines your total fulfilment cost?

The all-in cost per order depends on several variables specific to your business:

• Monthly order volume — higher volumes unlock better rates and spread fixed costs further
• Average items per order — multi-line orders increase pick time and therefore pick fees
• Product size and weight — larger, heavier items cost more to store and ship
• SKU count — a broad, complex range takes longer to manage and pick accurately
• Packaging requirements — standard unbranded packaging costs less than custom, branded materials
• Returns rate — higher return rates increase the total cost of fulfilment per net order shipped
• Domestic vs international split — international orders attract higher shipping costs and may require customs compliance support
• Sales channel mix — selling across Shopify, Amazon, TikTok Shop, and B2B simultaneously adds fulfilment complexity

How to compare 3PL quotes accurately

When you receive quotes from multiple providers, normalise them against the same set of inputs before comparing. Use your actual monthly order volume, average order lines, product weight and dimensions, and expected returns rate.

Ask every provider to break down:

• Pick and pack fee per order (and per additional item)
• Storage cost per pallet or bin per month
• Goods-in fee per pallet or per unit
• Returns processing fee per return
• Any monthly minimums or standing charges
• Peak period surcharge structure
• Carrier rates for your most common delivery zones

A provider with a higher pick fee may still be cheaper overall if their storage rates, carrier rates, and absence of minimums better match your actual operation.

The real cost of in-house fulfilment

Before evaluating 3PL costs, it is worth calculating what you are currently spending to fulfil orders in-house. The true figure includes warehouse rent, utilities, equipment, staff wages, management overhead, packaging materials, returns processing, and the carrier rates you access independently. When these are aggregated on a per-order basis, the comparison with an outsourced 3PL often shifts significantly, particularly for brands at the stage where fulfilment is consuming management time that should be spent on growth.

What to ask SCEND

SCEND operates a pay-as-you-go pricing structure with no setup fees, no minimum order volumes, and no minimum contract terms. Our UK fulfilment centre is based in Derbyshire with direct access to major carrier networks, and our EU fulfilment centre in the Netherlands serves European and global orders.

We maintain a 99.9% pick and pack accuracy rate and a 99.9% same-day dispatch rate, with a 9PM cut-off, one of the latest in the UK fulfilment industry.

If you want a straightforward breakdown of what fulfilment would cost for your specific business, speak to the team. We will build you a clear, line-by-line quote based on your actual order profile, no generic estimates, no hidden charges.

Frequently asked questions

How much does 3PL fulfilment cost in the UK?

The total cost depends on your order volume, product size, packaging requirements, and which services you need. There is no single industry-wide figure, but the most important thing is to compare providers on total cost per order, not individual line items, using your actual order profile.

What is a pay-as-you-go fulfilment structure?

A pay-as-you-go model means you only pay for the services you use each month. There are no fixed fees for warehouse space or pick and pack when orders are not flowing, making it the most cost-effective structure for brands with variable or growing order volumes.

Are there hidden costs in 3PL fulfilment?

Some providers charge monthly minimums, setup fees, peak surcharges, and additional fees for returns or complex SKUs that do not appear prominently in the initial quote. Always ask for a full breakdown before committing, and ask specifically about peak period pricing.

How do I calculate my fulfilment costs?

Start with your monthly order volume, average items per order, product weight and dimensions, and returns rate. Apply your provider's per-order pick fee, storage cost, and shipping rates to arrive at an estimated monthly total. Always model your peak month separately to understand your maximum exposure.

‍