The verdict in three sentences
A B2B store replatforming in Amsterdam costs, in 2026, between 25,000 and 70,000 EUR, delivered in 4 to 8 months depending on catalog size and the number of integrations. Two risks dominate: SEO loss (avoided by a rigorous 301 redirect plan that preserves 90%+ of traffic) and customer data loss (accounts, negotiated prices, order history). A poorly prepared migration can cost 10 to 30% of revenue in the cutover quarter.
Cost items of a B2B replatforming
| Item | 2026 range (EUR) | Note |
|---|---|---|
| Audit + migration strategy | 3,000 - 8,000 | Data and URL mapping |
| Design + B2B UX | 6,000 - 15,000 | Pro buyer journey redesign |
| Development / platform rebuild | 10,000 - 30,000 | Catalog, accounts, pricing |
| Data migration + integrations | 4,000 - 12,000 | Customers, orders, ERP |
| SEO plan + 301 redirects | 2,000 - 6,000 | Traffic preservation |
| QA + phased cutover | 3,000 - 9,000 | Testing, training, go-live |
| Total | 25,000 - 70,000 | Depending on scope |
What protects (or destroys) your traffic and customers
| Critical point | Best practice | Risk if neglected |
|---|---|---|
| URLs and SEO | Exhaustive 301 redirect plan | -10 to -30% organic traffic |
| Customer accounts | Full migration + password reset | Lost customers, overloaded sales-admin |
| Negotiated prices | Migrate per-customer grids | Pricing errors, disputes |
| Order history | Import + customer-area access | Lost reordering and trust |
| Cutover | Phased, with rollback | Revenue interruption |
| Performance | Load testing before go-live | Slowness, drop-offs |
Golden rule: never cut over without testing redirects in staging, validating account migration and having a rollback plan.
Mini case study
Marc runs a B2B medical supplies store in Amsterdam, 1.9M EUR online, on an ageing platform. He invests 48,000 EUR in a replatforming with migration. Thanks to a plan of 3,400 301 redirects, he keeps 94% of his organic traffic from month one (vs the -25% typical of a failed migration, i.e. ~475,000 EUR of revenue kept out of risk). Full migration of the 280 customer accounts and their prices avoids any service break. The new journey lifts B2B conversion from 1.8% to 2.4%, i.e. ~114,000 EUR of additional revenue/year.
FAQ
What does a B2B store replatforming cost in Amsterdam in 2026?
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Between 25,000 and 70,000 EUR depending on catalog size, pricing complexity and the number of integrations (ERP, CRM, payment). Allow 4 to 8 months.
How do I avoid losing my rankings?
An exhaustive 301 redirect plan, tested in staging, mapping each old URL to the new one. Well executed, it preserves over 90% of organic traffic.
What happens to customer accounts and prices?
They must be migrated in full: logins, negotiated pricing grids, order history. This is the most sensitive part of a B2B migration.
Should we cut over all at once or gradually?
Gradually where possible, with a rollback plan. A big-bang cutover is only acceptable with exhaustive testing and a low-traffic window.
What is the real financial risk?
A poorly prepared migration can cost 10 to 30% of revenue in the cutover quarter through traffic loss and confused customers. Investing in preparation always pays.
Let's scope your project. Share your current platform, catalog size and integrations: we scope a migration with no SEO or customer loss, 25,000-70,000 EUR. 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.