The verdict in three sentences
A B2B e-commerce platform in London costs between €30,000 and €90,000 in 2026, the gap driven mainly by per-customer negotiated pricing, credit terms and ERP integration. Unlike B2C, value comes not from traffic but from retaining existing accounts that order on a recurring basis. Budget 4 to 7 months of build time and a measurable return once 30% of your resellers order in self-service.
What each budget covers
B2B charges for complexity, not page count. A wholesaler with 200 SKUs and 3 price lists has different needs than a manufacturer with 15,000 SKUs and contract-based individual pricing. Here are the 2026 orders of magnitude for the London market.
| Tier | Budget | Scope | Timeline |
|---|---|---|---|
| Essential | €30,000 – €45,000 | Customer accounts, 1-2 price lists, cart, reorder | 4 months |
| Business | €45,000 – €70,000 | Per-customer pricing, online quotes, credit terms, ERP connector | 5-6 months |
| Advanced | €70,000 – €90,000 | Multi-catalogue, approval workflow, EDI, bidirectional ERP | 6-7 months |
| Maintenance | €500 – €1,500/month | Support, updates, hosting, security | recurring |
Integrations weigh heavily: an ERP connector (Sage, SAP Business One, Cegid) alone represents €8,000 to €20,000 depending on whether sync is one-way (catalogue and stock down) or two-way (orders pushed back automatically).
The B2B features that justify the price gap
| Feature | Purpose | Budget impact |
|---|---|---|
| Multi-user accounts | Buyer, approver, accountant per customer | +€4,000 – €8,000 |
| Per-customer pricing | Contract prices, volume discounts | +€6,000 – €12,000 |
| Online quotes | Request, approval, conversion to order | +€3,000 – €7,000 |
| Credit terms / accounts | 30-60 days, credit limit | +€4,000 – €9,000 |
| Fast reorder | Reorder from history | +€2,000 – €5,000 |
| ERP integration | Stock, prices, orders synced | +€8,000 – €20,000 |
These blocks are not gadgets: they remove the frictions that make a professional buyer prefer the phone. Credit terms, in particular, are often the tipping point for a reseller used to supplier payment delays.
Mini case study
Mark, sales director of an industrial supplies wholesaler in London, manages 140 pro customers with an average basket of €480 and a frequency of 2.5 orders per month. His 4 sales reps spend 35% of their time entering orders received by phone or email. He invests €58,000 in a Business platform with per-customer pricing and a Sage connector.
Result over 12 months: 45% of orders shift online, freeing the equivalent of 1.4 sales FTE reassigned to prospecting. The average basket of online-active customers climbs from €480 to €576 (+20%) thanks to reorder suggestions. On a B2B revenue of €4M, this basket gain represents over €300,000 in additional volume. The investment pays back in under 8 months.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
FAQ
Why does a B2B platform cost more than a B2C site?
Because the pricing logic is individualised: each customer can have their own prices, payment terms and catalogue. This personalisation adds 30 to 50% to the budget of an equivalent B2C store.
Can we start without ERP integration?
Yes, with manual or file-based catalogue imports. But beyond 500 orders/month, double entry becomes a bottleneck: ERP integration (€8,000 to €20,000) pays off by eliminating errors and admin time.
How long until we go live?
Budget 4 months for an essential scope, 5 to 7 months with ERP integration and negotiated pricing. The critical milestones are catalogue migration and price-list mapping.
Are credit terms risky?
The platform applies the credit limits defined in your ERP and automatically blocks accounts over the limit. You keep control, with no manual intervention on each order.
What realistic basket gain can I expect?
A 2026 order of magnitude of +15 to +25% is common, driven by one-click reordering and complementary product suggestions visible 24/7.
Let's scope your project. Tell us your number of pro customers, your price lists and your ERP: we'll frame the scope and indicative budget (€30,000–€90,000). 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.