The verdict in three sentences
A packaged MES (SaaS or licence) starts fast and costs 20,000 to 80,000 EUR/year, but forces its data model onto your machines. A custom MES (90,000 to 260,000 EUR) is justified when your machine park, routings or regulatory traceability fall outside market standards. Either way, real value comes from automatic machine data capture (OPC-UA) and ERP integration: that is where the +5 to 12 points of OEE are won.
What an MES costs in 2026
Production tracking covers work-order release, OEE calculation, real-time declaration, material traceability and non-conformance management. The ranges below are 2026 orders of magnitude for a mid-sized plant with 30 to 120 workstations.
| Line item | Packaged solution | Custom build |
|---|---|---|
| Core licence / subscription | 20,000 – 80,000 EUR/yr | 90,000 – 260,000 EUR (one-off) |
| Machine data capture (OPC-UA) | 15,000 – 40,000 EUR (setup) | included in scope |
| ERP integration (orders, stock, purchasing) | 10,000 – 25,000 EUR | 10,000 – 25,000 EUR |
| Shop-floor terminals / rugged tablets | 300 – 900 EUR/unit | 300 – 900 EUR/unit |
| Training + rollout support | 5,000 – 15,000 EUR | 8,000 – 20,000 EUR |
| Maintenance (annual) | included/subscription | 12 – 16 %/yr of build |
SaaS smooths cash flow but becomes more expensive than custom beyond 4 to 6 years if seat count is stable. Custom demands a heavier upfront investment but stays your asset.
Where the ROI hides
MES ROI does not come from the screen, but from eliminated data entry, avoided scrap and OEE gained. Here are the quantified levers seen on 2026 deployments.
| Lever | Typical gain | Basis |
|---|---|---|
| OEE gain | +5 to 12 points | recovered machine capacity |
| Scrap reduction | 10 to 20 % | material cost + rework |
| Manual entry removed | 15 to 30 h/month | operator + methods time |
| Project timeline | 6 to 10 months | scoping + machine integration |
| Traceability (audit, lot recall) | hours to minutes | customer / standard compliance |
Mini case study
Thomas, plant director of a stamping SME in Montreal (60 staff, 18 machines), is weighing a SaaS MES at 45,000 EUR/year against a custom build at 180,000 EUR with OPC-UA capture. His OEE is 62 %. Gaining 8 points (to 70 %) recovers roughly 340,000 EUR/year of billable capacity across his park. Even counting only a third of that potential, the custom build pays back in under 15 months — and he keeps software aligned to his specific routings rather than bending his process to the vendor's standard.
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Do machines really need to be connected (OPC-UA)?
Not strictly, but without automatic capture OEE stays declarative and unreliable. Machine connectivity (15,000 to 40,000 EUR) is the line item that turns a dashboard into a steering tool.
Packaged or custom MES for a mid-sized plant?
Packaged if your processes are standard and your park is recent. Custom (90,000 – 260,000 EUR) if you have atypical routings, heavy regulatory traceability or an in-house ERP to respect.
How long until it is live?
Expect 6 to 10 months: 1 to 2 months of scoping, the rest on machine integration, shop-floor testing and training. A single-line pilot can run by month three.
What maintenance budget should I plan?
For custom, maintenance is 12 to 16 %/year of build cost — 22,000 to 40,000 EUR/year on a 180,000 EUR project. In SaaS it is bundled into the subscription.
Can we start small then extend?
Yes. Many plants first equip one critical line (declaration + OEE), validate ROI, then extend machine capture and traceability in waves.
Let's scope your project. Tell us about your machine park, current ERP and the number of workstations to equip; we price the gap between a packaged and a custom MES. 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.
