The verdict in three sentences
A real-time ERP / ecommerce integration costs between 12,000 and 45,000 EUR in 2026 depending on the number of flows and ERP complexity. The gain is not cosmetic: it removes falsely displayed stockouts, unclogs the order desk and makes stock reliable down to the product. The key piece is the middleware that orchestrates the flows and the supervision that watches them.
The flows to sync and their cost
An integration is more than stock: prices, orders, customers and delivery statuses must flow both ways. Here is the typical breakdown.
| Flow | Direction | 2026 cost (EUR) | Target frequency |
|---|---|---|---|
| Product catalogue | ERP to store | 2,000-6,000 | daily / hourly |
| Available stock | ERP to store | 3,000-9,000 | real time |
| Prices and promos | ERP to store | 1,500-5,000 | hourly |
| Orders | store to ERP | 3,000-10,000 | real time |
| Delivery statuses | ERP to store | 2,000-7,000 | real time |
| Customer records | bidirectional | 1,500-6,000 | real time |
The orchestration middleware adds 3,000-10,000 EUR to the project, plus supervision of 300-1,200 EUR/month.
The operational return on investment
Real ROI is measured in avoided stockouts and freed order-desk hours. Here is a 2026 ballpark for an ecommerce SME.
| Metric | Before integration | After integration | Gain |
|---|---|---|---|
| Falsely displayed stockouts | 8-15% of SKUs | 1-2% | -85% |
| Manual order entry | 2-4 min/order | 0 | order-desk time back |
| Stock errors / month | 30-80 | 3-8 | 10x reliability |
| Price update delay | 24-48 h | < 1 h | responsiveness |
| Orders cancelled for stockout | 4-7% | < 1% | revenue saved |
On an active catalogue, cutting stockout cancellations alone often pays back the integration in under a year.
Mini case study
Sonia, ecommerce director of a Berlin distribution SME, handles 600 orders/month re-keyed by hand into the ERP at 3 minutes each, i.e. 30 hours/month. At 35 EUR/h loaded, that is 1,050 EUR/month of order-desk time, not counting 5% of orders cancelled for falsely displayed stockouts. The integration is quoted at 26,000 EUR plus 500 EUR/month of supervision. With freed order-desk time and avoided cancellations alone (estimated at 1,800 EUR/month), ROI is reached in about 11 months.
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FAQ
Do we necessarily need middleware?
For reliable real time, yes: the middleware absorbs format differences and occasional outages without breaking flows. Without it, a single ERP outage can freeze the whole store.
How long does the project take?
In 2026, expect 6 to 12 weeks depending on the number of flows and your ERP's API maturity. Old ERPs without a modern API lengthen timelines.
Is real time essential for every flow?
No: stock and orders benefit from real time, but the catalogue or prices often tolerate hourly sync. Targeting real time where it matters cuts cost.
What happens if the ERP goes down?
Well-designed middleware queues messages and replays flows when the ERP returns. That is exactly what separates a robust integration from a fragile script.
What is the recurring cost after go-live?
Budget 300-1,200 EUR/month of supervision and maintenance depending on flow volume. That cost prevents silent stock drift, which costs far more.
Let's scope your project. Tell us your ERP, your ecommerce platform and your priority flows: we cost the integration and its ROI. 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.
