The verdict in three sentences
A B2B e-commerce without ERP/PIM integration means double entry, stockouts and price discrepancies that erode customer trust. In 2026 in Dublin, integration costs 12,000 to 40,000 EUR net depending on the number of flows and their frequency (batch or real-time). The ROI is direct: fewer errors, reliable stock, and admin hours handed back to teams.
The four flows to scope
A B2B integration breaks down into flows. Each has its own cost and criticality.
| Flow | Direction | Typical frequency | 2026 price range (EUR net) |
|---|---|---|---|
| Product catalogue (PIM to web) | Downstream | On demand / daily | 3,000 - 8,000 |
| Real-time stock (ERP to web) | Downstream | Real-time / 15 min | 4,000 - 10,000 |
| Per-account pricing (ERP to web) | Downstream | Daily | 3,000 - 9,000 |
| Orders (web to ERP) | Upstream | Real-time | 4,000 - 12,000 |
| Status & invoices (ERP to web) | Downstream | Daily | 2,000 - 6,000 |
A core of catalogue + stock + orders is scoped around 12,000 - 20,000 EUR net. Add per-account pricing, statuses, invoices and multi-warehouse to approach 30,000 - 40,000 EUR net.
Native connector or custom middleware?
| Criterion | Native connector (iPaaS) | Custom middleware |
|---|---|---|
| Upfront cost | 4,000 - 12,000 EUR net | 15,000 - 40,000 EUR net |
| Subscription | 150 - 700 EUR/month | Hosting 50 - 200 EUR/month |
| Specific mapping | Limited to standard | Unlimited |
| In-house / exotic ERP | Often unsupported | Supported |
| Timeline | 3 - 6 weeks | 6 - 14 weeks |
| Vendor lock-in | High | Low |
Rule: common ERP (SAP Business One, Sage, Cegid, Odoo) and standard flows, the native connector suffices and is faster. In-house ERP, complex mappings or high volume, custom middleware brings reliability and avoids vendor lock-in.
Data pitfalls to watch
An integration rarely fails on technology, often on data. Three recurring traps: non-unique product SKUs between ERP and web, inconsistent selling units (piece vs case vs pallet), and fragmented pricing spread across several ERP tables. Cleaning this data upfront prevents 60 % of project delays. Also plan a recovery strategy for outages (queue, order replay) so you never lose an order.
Mini case study
Karim, IT director of a spare-parts distributor in Dublin, endures 2 entries per order (web then ERP) across 900 orders/month, i.e. 8 minutes of re-entry per order. That is 900 x 0.13 h = 117 hours/month, about 3,500 EUR/month of admin time (loaded cost 30 EUR/h).
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By integrating the web-to-ERP order flow (investment 22,000 EUR net, maintenance 500 EUR/month), he removes 95 % of that re-entry, saving ~3,300 EUR/month. Payback under 8 months, not counting the reduction in entry errors (credit notes, disputes) that weighed even more.
FAQ
How much does a full ERP/PIM integration cost in 2026?
From 12,000 to 40,000 EUR net depending on the number of flows and their frequency. A catalogue + stock + orders core starts at 12,000 EUR net; the full multi-flow setup approaches 40,000 EUR net.
Do I need real-time everywhere?
No. Stock and orders benefit from real-time; catalogue and pricing tolerate a daily batch. Real-time costs more: reserve it where it adds value.
What timeline should I expect?
Expect 6 to 14 weeks. A native connector on a standard ERP ships in 3 - 6 weeks; a custom multi-flow middleware needs 10 - 14 weeks.
Is a PIM essential?
Not always. Below a few hundred SKUs, the ERP or CMS suffices. Beyond that, a PIM structures records, variants and multilingual content, and makes the web flow reliable.
What happens if the ERP goes down?
Well-built middleware queues flows and replays orders on recovery. Require this in the specification so you never lose an order.
Let's scope your project. Tell us your ERP, any PIM and priority flows: we cost a robust integration (12,000 - 40,000 EUR net) with a recovery strategy. 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.
