The verdict in three sentences
A custom WMS for a Singapore distributor sits between EUR 60,000 and 150,000, deliverable in 4 to 8 months. Its ROI comes first from reliability: fewer picking errors, fewer stockouts, an always-correct inventory. Expect payback in 12 to 18 months once you exceed 5,000 order lines per month.
WMS modules and their cost
The core of a WMS is the physical control of stock, from receiving to shipped parcel. Here are the bricks priced for a Singapore quote.
| Module | What it does | Build range 2026 |
|---|---|---|
| Receiving & control | Expected, variances, put-away | EUR 9,000-18,000 |
| Locations & mapping | Zones, addresses, storage rules | EUR 10,000-20,000 |
| Picking & prep | Waves, optimized paths, packing | EUR 14,000-30,000 |
| Inventory | Cycle, full, variances | EUR 8,000-16,000 |
| Shipping & transport | Labels, EDI, manifests | EUR 9,000-20,000 |
| Steering & KPI | Service rate, productivity | EUR 8,000-18,000 |
Mobile devices and integration
A WMS lives on the floor, in the pickers' hands. Device choice and integrations weigh on the total budget.
| Item | Detail 2026 | Ballpark |
|---|---|---|
| Rugged handhelds (PDA) | EUR 450-900/unit | x picker count |
| Mobile scan app | Android/PWA, offline | included in build |
| ERP integration | Items, orders, stock | EUR 10,000-25,000 |
| Transport / TMS integration | Labels, tracking | EUR 6,000-15,000 |
| Customer EDI | Orders, dispatch advices | EUR 8,000-20,000 |
| Annual maintenance | 12-18% of build | recurring |
ROI: reliability pays
The picking error is a warehouse's costliest line: return, credit note, unhappy customer. A well-designed WMS slashes it.
| Indicator | Before WMS | After WMS (estimate) |
|---|---|---|
| Picking error rate | 2.5% | 1.0% |
| Inventory variance | 3-5% | < 1% |
| Picking productivity | base 100 | 115-130 |
| Put-away delay | 24-48 h | < 4 h |
| Cost of one error | EUR 25-40 | avoided |
Mini case study
Nadia is logistics director of a Singapore distributor: 12,000 lines picked/month, a 2.5% error rate, i.e. 300 errors/month at EUR 30 each = EUR 9,000/month of non-quality. A WMS at EUR 95,000 plus EUR 15,000/yr maintenance brings the rate to 1%: she drops to 120 errors/month, saving EUR 5,400/month, i.e. EUR 64,800/yr. The WMS pays back in about 18 months, before even counting picking productivity gains.
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FAQ
Is a custom WMS better than an ERP's WMS module?
The ERP module is enough for simple flows. Once you have wave picking, multi-warehouse or fine storage rules, custom avoids the manual workarounds that drag down productivity.
How long to deploy?
From 4 to 8 months depending on scope. We often start with receiving, locations and picking, then add cycle counting and EDI.
Do we have to replace all devices?
Not necessarily. A PWA mobile app runs on rugged smartphones at EUR 450-900; we validate scan compatibility before ordering the fleet.
How does the WMS talk to the ERP?
Via API or files: items and orders come down, stock movements go up. Budget EUR 10,000 to 25,000 for a robust, two-way integration.
What about a fallback if WiFi drops?
An offline-first app stores operations locally and re-syncs. It's essential in large warehouses where network coverage is patchy.
Let's scope your project. Share your lines/month volume, your picker count and your ERP for a target budget of EUR 60,000 to 150,000. 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.
