The verdict in three sentences
For a 12,000 m² 3PL serving 40 clients near Amsterdam, a custom WMS built by Kolonell falls within the complex application range of its grid, 7,000,000 to 15,000,000 FCFA (10,670 to 22,870 EUR and up), against 150 to 400 USD per user per month (about 140 to 370 EUR) for an international WMS, and 80,000 to 250,000 EUR for a custom build from a Dutch integrator (2026 order of magnitude). Custom takes the lead from 10 to 15 users, because it matches your storage billing based on actual use and your client-specific rules. The operational target is clear: a picking error rate below 0.5 % and every pallet traced from receipt to dispatch.
What a WMS must do in an Amsterdam 3PL warehouse
Between Schiphol, the Port of Amsterdam and the logistics parks of Westpoort or Haarlemmermeer, a 3PL receives containers and air freight, stores for e-commerce, pharmaceutical or industrial clients, and prepares orders for the Benelux and the rest of Europe.
| Feature | International WMS | Custom WMS | Metric tracked |
|---|---|---|---|
| Pallet receipt and labelling | Yes | Yes, with labels tailored to your clients | Dock-to-stock time |
| Locations and slotting | Yes, standard logic | Rules per client, FEFO rotation for pharma | Location occupancy rate |
| Scan-based picking | Yes | Yes, route optimised for your layout | Picking error rate |
| Storage billing | Often per m² or flat rate | Actual use: pallet per day, handling, extras | Unbilled revenue |
| Client portal (stock, movements) | Paid module | Included, multilingual | Client calls avoided |
| Offline operation | Rarely | Scanners that sync after outages | Picking stoppages |
| Bonded warehouse and customs data | Optional module | Built to your customs licence | Compliance in audits |
In the Netherlands, the critical point is customs: many 3PLs operate bonded warehouses or hold AEO status, which requires a stock record traceable down to each movement. A WMS that produces this record natively saves days during a customs audit.
The full budget: software, hardware and operations
Assumptions: 15 users (forklift drivers, pickers, team leads, admin), international WMS at 250 USD per user per month (about 230 EUR), custom WMS at 11,000,000 FCFA (about 16,770 EUR).
| Item | International WMS | Kolonell custom WMS |
|---|---|---|
| Licence or development | about 3,450 EUR a month | 10,670 to 22,870 EUR one-off |
| Configuration and integration | 4,500 to 12,000 EUR | Included in the project |
| Rugged Android scanners (15 units) | 5,700 to 13,700 EUR | 5,700 to 13,700 EUR |
| Label printers (3 units) | 1,400 to 2,700 EUR | 1,400 to 2,700 EUR |
| Maintenance and hosting | Included in the licence | 180 EUR a month (Premium maintenance) plus 90 to 230 EUR of hosting |
| Software cost over 3 years | about 132,000 EUR | about 30,500 EUR |
| Time to go live | 3 to 6 months | 4 to 6 months |
Android scanners cost 380 to 910 EUR each depending on ruggedness and reader. This hardware is needed whatever the option, so keep it in the budget.
Project roadmap over 4 to 6 months
| Phase | Duration | Deliverable |
|---|---|---|
| Scoping and warehouse layout survey | 3 weeks | Flow mapping, location naming |
| Receipt, slotting, inventory | 5 weeks | Scanner app, labels |
| Picking and dispatch | 4 weeks | Picking waves, delivery notes |
| Actual-use billing and client portal | 4 weeks | Rate cards per client, e-invoices |
| Pilot on 2 clients then cutover | 4 weeks | Initial stock count, team training |
Never start cutover without a full stock count: it is the basis of your 40 clients' trust in the stock shown on their portal.
Mini case study
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Pieter, director of a 12,000 m² 3PL near Amsterdam (illustrative persona), bills 68,000 EUR of storage and handling a month on flat rates. An audit shows that about 5 % of actual services go unbilled: pallets stored beyond the flat rate, extra handling. Actual-use billing recovers 3,400 EUR a month. On 30,000 order lines picked each month, moving from 1.5 % to 0.5 % errors avoids 300 errors, each costing about 12 EUR in returns and goodwill, or 3,600 EUR a month. With 7,000 EUR of monthly gains, a 16,770 EUR project pays back in under 3 months after go-live, if these assumptions hold.
FAQ
Does the WMS work during a network outage?
Yes, if the scanners run in offline mode and the server is cloud hosted. Movements are stored on the device and synced when the network returns, usually in under a minute.
Can each client be billed on its own rate card?
Yes, the custom WMS handles rate cards per client: pallet per day, inbound, outbound, per-line picking, recharged customs fees. Month-end invoices are issued in minutes.
How much does a professional Android scanner cost?
Between 380 and 910 EUR depending on ruggedness, battery and barcode reader. Plan 10 % spare devices.
Can the WMS connect to our clients' ERPs?
Yes, through file exchange or API to receive orders and return dispatch confirmations. Each client connection takes 1 to 3 weeks.
What timeline for a 12,000 m² warehouse?
Allow 4 to 6 months, including a 4-week pilot on two clients before moving the whole portfolio.
Let's scope your project. Tell us your floor area, number of clients and monthly volumes: we will price a scope, an indicative budget and a cutover plan. 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.
