The verdict in three sentences
A B2B e-commerce platform for a London wholesaler costs, in 2026, between 40,000 and 120,000 EUR (net) depending on catalogue depth, pricing complexity and ERP integration. This is not a brochure site: it is an ordering channel that replaces fax, e-mail and phone with customer accounts featuring negotiated pricing, quick order and reordering. The ROI comes from the cost to process an order, which falls from 8-12 EUR to under 3 EUR, not from traffic.
What sets a B2B platform apart from a consumer store
A wholesaler does not sell like a B2C retailer. Each trade customer has their own price list, payment terms, usual references and often several buyers under one account. The platform must handle all of this natively, or it creates more work than it removes.
| B2B module | Role | 2026 range (EUR net) |
|---|---|---|
| Catalogue + variants + selling units | Case, pallet, per-pack pricing | 8,000 - 18,000 |
| Customer-specific / negotiated pricing | Specific prices, volume discounts | 6,000 - 14,000 |
| Multi-user accounts | Buyers, approvers, roles | 4,000 - 9,000 |
| Quick order + reordering | Entry by reference, lists | 5,000 - 11,000 |
| ERP integration (stock/price/orders) | Real-time sync | 10,000 - 30,000 |
| Payment + credit / net terms | Card + 30/60-day terms | 4,000 - 12,000 |
| Order area & tracking | History, invoices, statuses | 3,000 - 8,000 |
A Starter core (catalogue, simple pricing, ordering) fits within 40,000-60,000 EUR net. Once ERP, approval workflows and credit terms enter the picture, you climb toward 80,000-120,000 EUR net. A realistic timeline is 14 to 24 weeks.
The real gain: the cost to process an order
The hidden cost for a wholesaler is the sales time spent re-keying orders received by e-mail or phone. Digitalising this flow frees the sales team for customer relationships and new business.
| Metric | Before (manual) | After B2B platform |
|---|---|---|
| Cost to process / order | 8 - 12 EUR | 2 - 3 EUR |
| Data-entry errors | 4 - 7 % | < 1 % |
| Confirmation delay | 3 - 24 h | Instant |
| Out-of-hours orders | 0 % | 20 - 35 % |
| Admin time for sales | 40 % | 15 % |
Mini case study
Thomas runs a catering-supplies wholesaler in London: 900 trade customers, 160 orders/day, an average processing cost of 10 EUR. He invests 72,000 EUR (net) in a B2B platform with customer pricing and ERP integration. Moving to 3 EUR per order on 70 % of volume, he saves 7 EUR x 112 orders x 220 days = 172,480 EUR/year in processing cost. The investment pays back in under 6 months, before counting the night and weekend orders recovered.
FAQ
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How much does a B2B e-commerce platform cost in 2026?
Expect 40,000 to 120,000 EUR (net) by scope. A core with catalogue, customer pricing and ordering starts around 40,000-60,000 EUR net; ERP integration and credit terms push toward 100,000 EUR net.
What is the go-live timeline?
Between 14 and 24 weeks for a full project with ERP. A catalogue + ordering MVP can ship in 10-12 weeks, then modules are added in batches.
Can we keep negotiated prices confidential per customer?
Yes. Each customer account only sees their own price list. Prices, volume discounts and terms are siloed; no customer sees another's rates.
Must the ERP be connected at launch?
Not necessarily, but it is the biggest reliability lever. Stock/price/order sync represents 10,000 to 30,000 EUR net and cuts availability errors fourfold.
What annual maintenance budget should we plan?
Expect 12 to 18 % of the initial cost per year in support, i.e. 6,000 to 20,000 EUR net/year, for evolutions, security and support.
Let's scope your project. Tell us your number of trade customers, your ERP and your pricing rules, and we will cost a B2B core and its rollout plan. 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.