B2B E-Commerce Replatforming Cost in Berlin in 2026

The verdict in three sentences

Migrating an ageing B2B e-commerce platform to headless costs between €40,000 and €120,000 in 2026, the gap driven by catalogue size and the number of integrations. The main gain is performance and integration flexibility, delivering better conversion on large catalogues. The real risk is not technical but data migration (customers, negotiated prices, history): that's where the project succeeds or fails, over 5 to 8 months.

Why and when to migrate to headless

Headless separates the front end (interface) from the back end (commerce), which speeds up pages and eases integrations. You migrate when the current platform throttles performance, slows evolution or costs too much to maintain. Here is the old vs new comparison, as 2026 orders of magnitude.

Performance is not cosmetic in B2B: a professional buyer reordering 40 lines abandons if each page takes 4 seconds. Headless is justified once the catalogue exceeds 15,000 to 20,000 SKUs.

Migration costs and TCO

The 3-year TCO of a well-run headless build is often lower than a monolith kept on life support, thanks to less risky evolutions and lighter maintenance. But year one remains a heavy investment: launch only if the current platform is genuinely blocking.

Mini case study

Thomas, e-commerce manager of an industrial parts distributor in Berlin, runs an 8-year-old B2B platform with 28,000 SKUs. Catalogue pages load in 4.5 seconds, conversion stagnates and every change costs a lot. He budgets €82,000 for a headless migration with ERP and PIM reintegration.

After cutover (7 months), load time drops to 1.3 seconds and B2B conversion rises by 18%. On online revenue of €2.4M, this gain represents around €430,000 in additional annual volume. Maintenance falls from €16,000 to €10,000/year. Even counting the migration cost, the project pays back in under 7 months on the conversion gain alone.

FAQ

When is headless truly justified in B2B?

When the catalogue exceeds 15,000-20,000 SKUs, performance throttles conversion or integrations have become costly. Below that, a modern monolith may suffice and cost less.

What is the main risk of the project?

Data migration: customers, negotiated prices, credit and order history. A poorly prepared migration can distort contract prices; budget €8,000 to €25,000 and rigorous testing.

How long does a headless migration take?

As a 2026 order of magnitude, 5 to 8 months depending on catalogue volume and the number of ERP/PIM integrations to rewire. Testing and cutover often take the final month.

Does TCO really fall after migration?

Usually yes: lighter maintenance and less risky evolutions. But year one is a heavy investment (€40,000–€120,000) that must be justified by a real block in the old platform.

Can we migrate in stages to reduce risk?

Yes: decouple the front first, then progressively reintegrate ERP and PIM. This phased approach limits cutover risk but slightly extends the timeline.

Let's scope your project. Share your catalogue size, current platform and integrations: we'll frame the migration and indicative budget (€40,000–€120,000). Detailed quote within 48 h. WhatsApp +221 77 596 93 33.