The verdict in three sentences
A B2B e-commerce migration is not a theme change: it is a transfer of catalog, customers and search rankings to a sturdier platform. Done well, it targets under 4h downtime and +15-25% performance; done badly, it can lose 10-30% of SEO traffic for lack of clean 301 redirects. In Amsterdam, the project costs EUR 18k-45k depending on data volume and flow complexity.
Migration risks and how to cover them
The budget is justified mainly by preventing losses that stay invisible until go-live day.
| Risk | Likelihood if mismanaged | Impact | Countermeasure |
|---|---|---|---|
| SEO loss | High | -10 to -30% traffic | Exhaustive 301 mapping |
| Long downtime | Medium | Lost sales | Planned DNS switch < 4h |
| Incomplete product data | High | Broken listings | Migration + QA |
| Lost customer accounts | Medium | Forced re-registration | Account + email migration |
| Wrong B2B pricing | Medium | Margin / disputes | Price QA per segment |
| Mobile perf regression | Low | Bounce rate | Core Web Vitals audit |
The 301 redirect mapping is the most profitable line item: it protects years of SEO equity.
Migration cost by phase
Breaking the project into phases makes the budget legible and avoids nasty surprises.
| Phase | Deliverable | 2026 range (EUR) | Timeline |
|---|---|---|---|
| Audit & scoping | Migration plan + URL mapping | 3k-6k | 1 week |
| Catalog migration | Products, variants, media | 6k-15k | 2-3 weeks |
| Accounts & orders | Customer history | 4k-9k | 1-2 weeks |
| 301 redirects & SEO | Mapping + tags | 3k-7k | 1 week |
| QA & switchover | Testing + go-live < 4h | 4k-9k | 1-2 weeks |
For a mid-sized B2B store, a realistic envelope is around EUR 28k-36k.
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Mini case study
Sarah, e-commerce director of a distribution firm in Amsterdam, migrates an unstable 8,000-SKU WooCommerce to a scalable B2B platform. Budget: EUR 34k, actual downtime of 2h30, zero SEO loss thanks to 8,000 verified 301 redirects. After migration, load time drops from 4.1s to 1.9s (+22% mobile conversion). The extra orders cover the investment in 10 months.
FAQ
How much does a B2B e-commerce migration cost in 2026 in Amsterdam? Between EUR 18k and 45k depending on SKU count, customer history and flow complexity (ERP, per-segment pricing).
How do I avoid losing my rankings? With an exhaustive 301 redirect mapping old URL → new URL, kept and tested before switchover. That is what prevents the 10-30% traffic loss.
What downtime should I target? Under 4 hours, by scheduling the DNS switch in a quiet window and preparing the new platform upstream. An improvised switch multiplies the risk of a long outage.
What performance gain should I expect? Typically +15-25% on load times and mobile conversion, provided you audit Core Web Vitals after migration.
Should I migrate everything at once? No: we recommend a phased switchover (catalog, accounts, SEO, go-live) to control risk and validate each step before production.
Let's scope your project. Tell us your current platform, your SKU and customer volume, and your target timeline, and we'll price the migration phase by phase. 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.