The verdict in three sentences
An ecommerce migration / rebuild costs 15,000 to 60,000 EUR in 2026 depending on catalog size and data migration. The risk is not technical but commercial: a botched migration loses 10 to 30% of organic traffic through forgotten redirects and broken URLs. Done right, a strong rebuild returns 15 to 25% higher conversion — so budget is judged against protected traffic, not just cost.
Migration budget by catalog
Price follows volume and migration complexity. 2026 order-of-magnitude figures.
| Project size | Catalog | Data migrated | 2026 budget (EUR excl. tax) |
|---|---|---|---|
| Small store | < 500 SKUs | Customers + orders | 15,000 - 25,000 |
| Mid store | 500 - 5,000 SKUs | + reviews, accounts, SEO | 25,000 - 40,000 |
| Large catalog | 5,000 - 30,000 SKUs | + variants, integrations | 40,000 - 60,000 |
| Multi-store / B2B | > 30,000 SKUs | + multi-currency, ERP | 55,000 - 90,000+ |
The most underestimated item is the 301 redirect plan: every indexed old URL must point to its equivalent, with no chains or loops.
Risks and safeguards
A migration is run like a move: protect what exists before moving anything. Major risks and their safeguards.
| Risk | Potential impact | Safeguard |
|---|---|---|
| Forgotten 301 redirects | -10 to -30% SEO traffic | Exhaustive URL mapping |
| Loss of customer/order data | Disputes, breaks | Migration tested on staging |
| Sales freeze during cutover | Lost revenue in window | Night DNS switch, rollback ready |
| Performance drop | Lower conversion | Core Web Vitals audit before/after |
| SEO tags not carried over | Ranking drop | Export/import titles, metas, hreflang |
Golden rule: freeze a signed migration checklist before cutover, with a tested rollback plan.
Mini case study
Sarah, ecommerce director of a furniture brand in New York, does 620,000 EUR/month of online revenue, 45% from organic traffic. Her legacy platform caps at 1.9% conversion. The 48,000 EUR migration, with a full redirect plan, preserves SEO (traffic loss limited to 3%) and lifts conversion to 2.3% thanks to a faster funnel. Gain: +0.4 point on 620,000 EUR, i.e. ~+130,000 EUR of monthly revenue potential on that scope; the investment is absorbed within the first month at full performance.
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FAQ
How much does an ecommerce migration cost in 2026?
15,000 to 60,000 EUR depending on the number of SKUs and data migrated (customers, orders, reviews, SEO). Multi-store or B2B catalogs exceed 60,000 EUR.
Will I lose my rankings when migrating?
Only if the 301 redirect plan is rushed. With exhaustive URL mapping and tag migration, the loss is limited to a few transient percent, recovered within 4 to 8 weeks.
Do we have to close the store during cutover?
No. The DNS switch happens at night with a rollback ready, to avoid any sales freeze. A few hours' window is enough if staging was validated.
When do we see ROI from a rebuild?
As soon as conversion improves: 15 to 25% is realistic with a faster, mobile-first funnel. On six-figure monthly revenue, the investment often pays back in 1 to 3 months.
What's in a serious migration checklist?
URL mapping, 301 plan, data migration and testing, before/after performance audit, SEO tag migration, rollback plan and signed staging validation before cutover.
Let's scope your project. Give us your current platform, catalog size and organic-traffic share, and we'll frame a migration with no SEO or sales loss, checklist in hand. 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.
