The verdict in three sentences
A B2B e-commerce platform for a wholesaler is not a consumer store: the core is per-customer pricing, multi-user pro accounts and ERP integration. In 2026 in London, budget a custom build of 45,000 to 120,000 EUR or a SaaS B2B solution at 500-3,000 EUR/month, depending on SKU count and number of accounts. The return comes mainly from order-taking time cut by three and fewer data-entry errors.
What drives the price of a B2B portal
A wholesaler portal is priced in functional blocks, not as a flat "brochure site" fee. Here is the 2026 order of magnitude for the modules that truly matter.
| Feature | Custom cost (EUR) | Business value |
|---|---|---|
| Catalogue + variants + spec sheets | 8,000 - 16,000 | Order base |
| Per-customer / group price lists | 7,000 - 15,000 | B2B core |
| Multi-user pro accounts + roles | 5,000 - 11,000 | Delegated buyers |
| Credit limits and deferred payment | 6,000 - 14,000 | Customer credit |
| Fast reorder by SKU | 4,000 - 9,000 | Time savings |
| ERP integration (stock, price, orders) | 10,000 - 30,000 | Zero double entry |
| Online quotes + approval | 4,000 - 10,000 | Sales cycle |
A realistic project adds 6 to 8 of these blocks, hence the 45,000-120,000 EUR range. A SaaS solution (Shopify Plus B2B, BigCommerce B2B) compresses upfront cost but charges a subscription and limits customisation of complex price lists.
SaaS or custom: the 3-year cost
The right call is read over 3 years, including subscription and integration.
| Item | SaaS B2B | Custom |
|---|---|---|
| Setup | 12,000 - 25,000 EUR | 45,000 - 120,000 EUR |
| Subscription / year | 6,000 - 36,000 EUR | Hosting 1,500 - 4,000 EUR |
| ERP integration | 8,000 - 20,000 EUR | Included in project |
| Total 3-year cost | 40,000 - 100,000 EUR | 55,000 - 135,000 EUR |
| Price-list customisation | Limited | Full |
Below 300 SKUs and with simple price lists, SaaS wins. Beyond that, with rates negotiated customer by customer and credit limits, custom becomes profitable.
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Mini case study
Philippe, sales director of a professional-supplies wholesaler in London (18 reps, 1,200 active customers), received 250 orders/day by phone and email. Each order took 8 minutes of order-desk entry, about 33 hours/day spread across the team. A B2B portal at 78,000 EUR shifted 60% of orders to self-service: 20 hours/day saved, roughly 4,400 hours/year. At 22 EUR loaded per hour, that is nearly 96,000 EUR/year, a payback under 11 months, before counting fewer entry errors.
FAQ
How long to deliver a B2B portal? Budget 3 to 5 months for a custom build with ERP integration, 6 to 10 weeks for a well-scoped SaaS. The limiting factor is almost always the quality of product and pricing data.
Can I keep my current ERP (Sage, SAP, NetSuite)? Yes, integration runs via API or files; budget 10,000 to 30,000 EUR to sync stock, prices and orders in near real time.
Will customers see different prices? That is the essence of B2B: each account sees its negotiated price list, volume discounts and credit limit. This logic is about 20% of the development budget.
Is online payment mandatory? No. Many wholesalers keep payment on terms via open account; the portal then manages credit and reminders rather than immediate payment.
Can we start small then extend? Yes, a first version with catalogue, accounts and fast ordering can run at 45,000 EUR, then add credit limits and ERP in stages.
Let's scope your project. Tell us your SKU count, number of customer accounts and your ERP: we price a B2B portal to match, from a 45,000 EUR MVP to a full custom build. 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.
