The verdict in three sentences
Connecting your store to your ERP costs 8,000 to 30,000 EUR for the connector, plus 100 to 500 EUR/month if you use an iPaaS middleware. The real win is not cosmetic: no more double entry, -80 % errors, reliable real-time stock and same-day shipping instead of D+2. The structuring choice is the sync mode: real-time via webhooks for critical stock, nightly batch where a one-day error margin is acceptable.
ERP, sync mode and budget
Each ERP has its own connectors and limits. Here are the most common 2026 scenarios for an e-commerce SME, from simplest to most robust.
| ERP | Recommended mode | Connector cost | Timeline |
|---|---|---|---|
| Sage 100 / Sage X3 | Batch + stock webhooks | 10,000 - 20,000 EUR | 5-8 wks |
| SAP Business One | Real-time iPaaS | 18,000 - 30,000 EUR | 8-12 wks |
| Odoo | Native connector | 8,000 - 15,000 EUR | 4-7 wks |
| Microsoft Dynamics 365 | Real-time iPaaS | 20,000 - 30,000 EUR | 8-12 wks |
| Cegid | Custom middleware | 15,000 - 25,000 EUR | 7-10 wks |
| EBP / Ciel | Nightly batch | 6,000 - 12,000 EUR | 3-6 wks |
On the recurring side, a managed iPaaS middleware costs 100 to 500 EUR/month by flow volume; a self-hosted native connector only carries maintenance (150 to 400 EUR/month).
Real-time or batch: what to sync
Not every field needs real-time. Stock and orders do; the product catalog often does not. Here is the matrix to validate with your IT lead.
| Data | Direction | Recommended frequency | Stake |
|---|---|---|---|
| Available stock | ERP to store | Real-time (webhook) | Avoid overselling |
| Prices / customer tariffs | ERP to store | Hourly batch | Commercial consistency |
| Orders | Store to ERP | Real-time | Same-day shipping |
| Customer records | Bidirectional | Nightly batch | Single source |
| Credit notes / returns | ERP to store | Hourly batch | Accurate accounting |
| Product records | ERP to store | Nightly batch | Up-to-date catalog |
| Delivery status | Carrier to ERP | Real-time | Customer tracking |
The classic trap: syncing everything in real time. It is pricier, more fragile and pointless for low-volatility data. A good architect segments flows by criticality.
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Mini case study
Sophie, CFO of a medical equipment distributor in Singapore, managed 3,200 SKUs across two disconnected systems. Two staff re-keyed store orders into Sage 100, about 3 h/day each, with a 4 % error rate driving credit notes and disputes. The connector, quoted at 16,000 EUR, automates order flow and real-time stock. Gain: 2 x 3 h/day x 22 days = 132 h/month freed, roughly 2,200 EUR/month of payroll, plus the end of overselling. Payback reached in about 8 months.
FAQ
How much does connecting my store to my ERP cost? Between 8,000 and 30,000 EUR depending on the ERP and sync mode, plus 100 to 500 EUR/month for an iPaaS middleware. Odoo is cheapest, SAP Business One and Dynamics the highest.
Do I need real-time everywhere? No. Stock and orders benefit from real-time; catalog, prices and customers tolerate hourly or nightly batches, which lowers cost and fragility.
What is phantom stock and how do I remove it? It is a gap between displayed and actual stock caused by double entry. Real-time webhook sync eliminates it by updating the store on every ERP movement.
iPaaS middleware or native connector? iPaaS deploys fast and is resilient but carries a monthly subscription. A native connector costs more to build but nothing in license; it pays off at high volumes.
How long to deploy? From 3 to 12 weeks depending on the ERP and number of flows. A simple EBP batch ships in 3-6 weeks, a real-time SAP integration in 8-12 weeks.
Let's scope your project. Tell us your ERP, your e-commerce platform and priority flows (stock, orders, prices) and we will quote the connector and the right sync mode. 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.
