The verdict in three sentences
A B2B e-commerce platform in London is budgeted between 30,000 and 90,000 EUR in 2026 depending on the negotiated features (customer-specific pricing, credit limits, recurring orders). The ERP connector adds 8,000 to 25,000 EUR and the monthly run 200 to 900 EUR. The real return isn't the basket but automated order entry: 40% less sales-admin time and zero re-keying.
What drives the price of a B2B portal
B2B e-commerce has almost nothing in common with B2C: no consumer funnel, but customer accounts, negotiated price grids, credit exposure and recurring ordering. Each function has its own build cost. Here is the 2026 order of magnitude for a mid-range London project.
| B2B function | Role | 2026 cost (EUR) |
|---|---|---|
| Catalog + accounts core | Login, roles, companies | 12,000 - 20,000 |
| Customer / tier pricing | Negotiated grids, volume discounts | 8,000 - 20,000 |
| Credit & exposure management | Limits, blocking, dunning | 5,000 - 12,000 |
| Recurring order / reorder | Saved baskets, quick order | 4,000 - 9,000 |
| ERP connector (SAP/Sage) | Stock, prices, orders both ways | 8,000 - 25,000 |
| Quote & approval portal | Multi-buyer workflow | 5,000 - 11,000 |
A simple core with no ERP starts around 32,000 EUR; a full portal with negotiated pricing and a two-way connector exceeds 85,000 EUR.
Total cost of ownership over 3 years
The purchase price is only half the decision. The run (hosting, support, evolutions) weighs heavily over 3 years. Here is a projection for a mid-range London B2B portal.
| Line item | Year 1 | Years 2-3 (each) |
|---|---|---|
| Initial build | 58,000 EUR | — |
| Hosting + monitoring | 3,600 EUR | 3,600 EUR |
| Support (fixes, updates) | 6,000 EUR | 8,000 EUR |
| Functional evolutions | 4,000 EUR | 6,000 EUR |
| Total | 71,600 EUR | 17,600 EUR |
Over 3 years the TCO lands around 106,800 EUR, two thirds of it concentrated in year 1.
Mini case study
Thomas, sales director at an industrial-supplies distributor in London, manages 220 trade customers whose orders arrive by email, fax and phone. His three-person sales-admin team spends about 5 hours a day re-keying orders. At 32 EUR fully loaded hourly cost, that is 480 EUR/day, roughly 105,600 EUR/year. A 58,000 EUR B2B portal that automates 40% of that entry saves ~42,000 EUR/year: payback in under 17 months, run included.
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FAQ
What does an entry-level B2B portal really cost?
Around 30,000 to 40,000 EUR for a catalog + accounts + simple ordering core, without an ERP connector or tier pricing.
Is the ERP connector essential?
Not in phase 1, but without it you re-key orders into the ERP. The two-way connector (8,000 to 25,000 EUR) removes that double entry and keeps displayed stock reliable.
What delivery timeline should I expect?
Between 4 and 8 months depending on pricing-grid complexity and ERP data quality. A poorly structured catalog always lengthens the project.
What monthly budget after launch?
From 200 to 900 EUR/month depending on traffic, monitoring and support volume. Plan an annual contract rather than ticket-by-ticket work.
Can we start small and expand?
Yes: core in phase 1, then negotiated pricing and ERP connector in phase 2. It is recommended to validate adoption before investing in heavy integration.
Let's scope your project. Tell us your number of trade accounts, your ERP and your negotiated-pricing rules: we'll price the core and the phases. 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.
