Warehouse profitability: best practices of the best-performing logistics providers

This article details the three indicators that separate a profitable warehouse from one that works hard for little margin, the six practices that make the difference, and a method to calculate your real cost per order line.

Why warehouse profitability is under pressure

The French warehousing market has nearly 1,900 companies. According to Xerfi, its growth now relies almost entirely on price increases, with sluggish industrial demand and constrained consumer spending¹. In other words, volumes no longer make up for inefficiencies.

At the same time, two cost items are weighing more and more heavily:

• Labor. Order picking can account for up to 55% of a warehouse’s operating costs². Every unnecessary movement by a picker shows up in the margin.
• Real estate. Pressure on logistics space makes every empty square meter more expensive, and every under-invoiced square meter more painful.

In this context, the question is no longer “how much volume do we handle?” but “how much do we really earn on each client, each operation and each location?”.

The 3 indicators that drive warehouse profitability

1. The fill rate

The fill rate (or occupancy rate) compares occupied locations with available locations. An empty warehouse loses money, but so does a full one. Above 85%, aisles become congested, picking and put-away areas run out of space and productivity drops. The 80 to 85% range is generally considered the target for a standard operation³.

Top-performing providers track this indicator by zone (pallet racking, picking, floor, cold storage) and by week, not as an annual average. An average of 78% can hide a picking zone saturated at 95% and a pallet racking area half empty.

2. The cost per order line

This is the most revealing indicator for a 3PL, because the order line is the unit that consumes the most labor. It is calculated as follows:

Cost per line = (direct picking costs + share of overheads) / number of lines picked

Compared with the price invoiced per line, it immediately shows whether a client is profitable. Gaps often come from an order profile that has changed since the contract was signed: fewer items per order, more small SKUs, more returns.

3. The utilization rate of sold capacity

The fill rate measures physical occupancy. Sold capacity measures what is actually invoiced. A client who has reserved 1,000 locations but only occupies 600 can be profitable if all 1,000 are invoiced, or ruinous if only the 600 are. Top-performing providers reconcile three figures every month: available capacity, occupied capacity and invoiced capacity.

The 6 best practices of the best-performing logistics providers

1. Measure profitability by client, not by site

A site that breaks even overall almost always hides very profitable clients who subsidize loss-making ones. The first practice of top-performing 3PLs is a profit and loss statement per client account: invoiced revenue on one side, hours consumed, locations occupied and consumables on the other. It is the basis of any renegotiation.

2. Invoice by the real unit of work

Flat-fee contracts age badly. Profitable providers invoice by the unit that actually generates the cost: the line for picking, the pallet-day or the location for storage, the unit for returns. They also include a review clause triggered by changes in the order profile (average number of lines per order, weight, volume).

3. Manage capacity as an asset to sell

An empty location is revenue lost every day. The best 3PLs know their free capacity week by week, by location type, and actively sell it: short-term storage contracts, seasonal overflow, capacity offered to other shippers. This is the principle of capacity management and monetization.

4. Reduce travel during picking

Travel is often the dominant component of picking time². The levers are well known: place fast-moving SKUs as close as possible to the docks (ABC slotting), review the layout every quarter, group orders into waves, optimize picking routes. They cost almost nothing and are measured directly on the cost per line. These levers are covered in detail in our article on logistics optimization.

5. Track the cost of poor quality

A picking error is paid for several times: a return to process, a new shipment, a credit note for the client, sales time spent handling the complaint. Top-performing providers measure the error rate by picker, by zone and by client, and calculate the full cost of an error. That figure turns a “quality” topic into a margin topic.

6. Invoice all value-added services

Relabeling, kitting, quality control at receipt, additional inventories, returns management: these value-added operations are often more profitable than basic receiving and shipping. They are also the first to be performed “as a favor” without being invoiced. Profitable 3PLs record them in their WMS when they are performed, and find them automatically on the monthly invoice.

Benchmark: where does your warehouse stand?

The table below gathers benchmarks to help you position yourself. Sourced values are flagged; the others are indicative field benchmarks, to be compared with your own history.

Worked example: calculate your cost per line

Let’s take an illustrative example: an e-commerce client handled by a 3PL, invoiced €0.95 per line picked.

The client costs €1.06 per line for €0.95 invoiced. The €0.11 gap represents €4,620 per month, or nearly €55,000 per year, on a single account. Without a per-client calculation, this loss remains invisible in the site’s overall result.

Where to start?

Three steps are enough to objectively assess your warehouse’s profitability:

1. Isolate hours, locations and consumables by client over the last three months.
2. Calculate the cost per line and compare it with the invoiced price, client by client.
3. Reconcile available, occupied and invoiced capacity to identify unmonetized square meters.

If your data is scattered between the WMS, invoicing and Excel files, a logistics diagnostic helps establish this picture quickly. To go further on warning signs, also read our article on logistics audit indicators and the one on logistics performance KPIs. For providers managing several sites and several clients, our 3PL WMS guide details the features that support this tracking.

Frequently asked questions