The verdict in three sentences
A custom B2B e-commerce platform costs between EUR 40,000 and EUR 120,000 excl. tax in 2026, depending on the complexity of per-account pricing, credit limits and ERP integration. This is not a consumer store: the value lies in negotiated prices customer by customer, deferred payment and fast reordering of usual references. Expect a 4 to 7 month project, and always think in total cost over three years, not purchase price.
What drives the price of a B2B platform
A B2B e-commerce site shares almost nothing with a B2C store beyond the cart. The manufacturer sells to identified professional customers, each with their own price grid, payment terms and history. The price therefore depends mainly on the commercial logic to be modelled.
| Item | 2026 range (EUR excl. tax) | What it covers |
|---|---|---|
| Scoping and design | 5,000 - 12,000 | Workshops, pro journeys, pricing rules |
| Catalogue and per-account pricing | 8,000 - 22,000 | Negotiated grids, volume discounts, hidden prices |
| Customer accounts and roles | 6,000 - 15,000 | Multi-user, buyer/approver, budgets |
| Credit limits and deferred payment | 7,000 - 18,000 | Credit ceiling, 30/60 day terms, auto block |
| ERP / stock integration | 8,000 - 25,000 | Sync of products, prices, stock, orders, invoices |
| Fast ordering and reorder | 4,000 - 10,000 | CSV import, lists, one-click reorder |
| Testing, training, go-live | 4,000 - 12,000 | Tests, data migration, load handling |
A platform at EUR 45,000 covers a structured catalogue, per-account pricing and light ERP integration. Above EUR 90,000, you are talking multi-level approval workflows, configurators and real-time two-way ERP synchronisation.
Custom or Shopify B2B: the 3-year total cost
The question is never the day-one price but the cumulative cost. A packaged solution starts cheaper but charges subscriptions and commissions that add up.
| Element | Shopify Plus B2B | Custom Kolonell |
|---|---|---|
| Setup | EUR 15,000 - 30,000 | EUR 40,000 - 120,000 |
| Subscription / year | EUR 24,000 - 30,000 | 0 (hosting 3,000 - 8,000) |
| Sales commission | 0.15 - 0.4 % of revenue | 0 |
| ERP customisation | Limited, via paid apps | Native, unlimited |
| Code ownership | No | Yes |
| 3-year total cost (EUR 4M revenue) | 110,000 - 170,000 | 60,000 - 140,000 |
At high online revenue, custom becomes cheaper from the second year, while offering total freedom over the B2B rules specific to your business.
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Mini case study
Thomas, sales director of a hardware manufacturer in Nantes, generates EUR 3.8M in revenue, 40 % of which could move online. His 320 professional customers order by phone and email, tying up 3 full-time sales reps on data entry. He invests EUR 68,000 excl. tax in a B2B platform with per-account pricing and ERP sync. Target result: 55 % of orders move online within a year, freeing the equivalent of 1.5 sales roles (about EUR 60,000/year) reassigned to prospecting. The project pays for itself in about 14 months.
FAQ
How long to deliver a B2B platform? Expect 4 to 7 months depending on ERP integration. A fast-order + per-account pricing core can ship in 4 months; configurators and complex workflows add 2 to 3 months.
Can we keep our current ERP? Yes. Integration is done via API or connector; expect EUR 8,000 to 25,000 depending on whether synchronisation is one-way or real-time two-way.
How are deferred payment and credit limits handled? The platform applies a credit ceiling per customer, offers 30/60 day terms and automatically blocks any order exceeding the authorised limit, exactly like your current accounting logic.
Should prices be shown publicly? No. In B2B, each customer sees their grid after logging in. Prices stay invisible to unidentified visitors, protecting your negotiated margins.
What annual maintenance budget should I plan? Expect 10 to 18 % of development cost per year for hosting, upgrades and support, i.e. around EUR 7,000 to 15,000 for a EUR 70,000 platform.
Let's scope your project. Tell us about your catalogue, your ERP and the volume of customer accounts to manage, with an indicative budget between EUR 40,000 and EUR 120,000 excl. tax. 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.
