The verdict in three sentences
A custom WMS for a 3PL fulfillment provider in Dublin sits between 45,000 and 100,000 EUR, depending on client count and automation level. The critical point for a 3PL is multi-client billing and optimized picking, rarely well covered by off-the-shelf WMS. Expect a 6 to 10 month timeline for a production version with mobile scanning.
The WMS specific to a 3PL
A 3PL WMS must handle several clients in one warehouse with different rules: dedicated or shared locations, handling units, expiry dates, FIFO/FEFO, and above all per-client billing (storage, movements, picking, value-added). Custom embraces these rules instead of working around them.
| Module | Function | Indicative timeline |
|---|---|---|
| Locations + stock | Mapping, FIFO/FEFO, lots | 5-7 weeks |
| Receiving + control | ASN, counter-check | 4-6 weeks |
| Picking + fulfillment | Optimized paths, waves | 6-8 weeks |
| Mobile scanning | Terminals, barcodes | 5-7 weeks |
| 3PL client billing | Storage, movements, VA | 6-8 weeks |
| Client portal | Stock, orders, KPIs | 4-6 weeks |
Off-the-shelf vs custom for a multi-client operation
The comparison hinges on billing, rule flexibility and per-user cost. Here is a 2026 order of magnitude for a 3PL warehouse with 15 pickers and 8 clients.
| Criterion | Off-the-shelf WMS | Custom Kolonell |
|---|---|---|
| Setup | 8,000-25,000 EUR | 45,000-100,000 EUR |
| Subscription | 30-60 EUR/user/month | Hosting 300-500 EUR/month |
| Multi-client 3PL billing | Partial / rigid | Full custom |
| Rules per client | Limited | Unlimited |
| Year 1 cost (15 users) | ~15,000-30,000 EUR | ~65,000 EUR |
| Year 3 cost (cumulative) | ~40,000-55,000 EUR | ~75,000-82,000 EUR |
| Code ownership | No | Yes |
Mobile scanning and optimized picking lift fulfillment productivity: a 15% gain in picking speed frees significant capacity without hiring.
Mini case study
Nadia, operations director of a 3PL in Dublin, runs 8 clients with 15 pickers at a loaded cost of 2,600 EUR/month/picker, i.e. 39,000 EUR/month in labor. Her client billing is done in spreadsheets today, with missed re-billing estimated at 3% of revenue.
A custom WMS at 65,000 EUR brings two gains: +15% optimized picking (equivalent to ~2 positions of recovered capacity, about 62,000 EUR/year) and reliable client billing recovering the 3% of misses, i.e. on 2.4M EUR of logistics revenue about 72,000 EUR/year. The investment is amortized in under 12 months in this scenario.
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FAQ
Does the WMS handle per-client 3PL billing?
Yes, this is the strength of custom. Each client has its own billing rules (per-pallet storage, per-m3, movements, per-line picking, value-added), and the system generates invoices automatically from real movements.
Does mobile scanning work offline?
Yes, terminals can run in degraded mode and resync when the network returns, avoiding a picking stop during a warehouse Wi-Fi outage.
Do you handle FIFO/FEFO and expiry dates?
Yes, the WMS applies FIFO or FEFO rules per client and alerts on short dates. Essential for food and cosmetics.
What is the deployment timeline?
Expect 6 to 10 months for a full multi-client WMS with billing. A core (locations + receiving + picking + scanning) can ship in 5 months to start with a few clients.
Do clients get access to their stock?
Yes, a client portal gives real-time access to stock, orders, KPIs and documents, sharply cutting email and phone requests.
Let's scope your project. Tell us the number of clients hosted, your picking line volume and your billing rules: we will frame the scope and priority core. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
