The verdict in three sentences
Migrating a B2B store from PrestaShop to custom makes sense when modules pile up, performance drops and every change becomes a headache. In 2026, expect 25,000 to 70,000 EUR and 10 to 16 weeks, SEO redirects and data migration included. The ROI comes from recovered performance, improved B2B conversion and the end of hidden module and maintenance costs.
Migration costs per item
A well-run migration isn't a graphic redesign: it's a controlled transfer of data, business rules and rankings. Here are the 2026 items.
| Item | 2026 range (EUR) | Watch point |
|---|---|---|
| Audit and data mapping | 2,000 - 6,000 | PrestaShop data quality |
| Catalog and variant migration | 4,000 - 12,000 | Attributes, per-account prices |
| Customer and history migration | 3,000 - 9,000 | Accounts, credit, terms |
| Custom core development | 12,000 - 35,000 | Native B2B modules |
| Redirects and SEO migration | 3,000 - 8,000 | 301 redirect plan |
| ERP integration | 6,000 - 20,000 | Price/stock sync |
Migration risks and ROI
The two classic fears are SEO loss and service interruption. Managed well, they're controllable, and gains appear within the first months.
| Element | On PrestaShop | After custom |
|---|---|---|
| Load time | 3 - 6 s | < 1.5 s |
| Monthly module cost | 150 - 500 EUR | 0 (hosting 80-300) |
| B2B conversion rate | baseline | +10 to +20% |
| SEO risk at cutover | high without plan | controlled with 301 |
| Scalability | limited by modules | total |
| Annual maintenance | unpredictable | budgeted |
Mini case study
Sophie, a B2B ecommerce owner in industrial supplies in Bordeaux, runs on PrestaShop with 22 paid modules and a 5-second load time. Her per-account prices are managed by hand and her ERP poorly synced. She migrates to custom for 48,000 EUR.
After migration, load time drops below 1.5 s and B2B conversion rises 15%. On online revenue of 1.2M EUR, that's ≈ 180,000 EUR of additional annual orders. By removing 22 modules (≈ 380 EUR/month, i.e. 4,560 EUR/year) and ERP double entry, she pays back the migration in under 6 months on the conversion gain alone.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Will I lose my rankings by migrating?
Not if a 301 redirect plan is built URL by URL before cutover. A well-prepared migration preserves, even improves, SEO thanks to recovered speed.
How long does migration take?
10 to 16 weeks in 2026 depending on data volume and ERP. Clean data migration and the redirect plan are the steps not to rush.
Can we migrate without downtime?
Yes. We build and test in parallel, then cut over in a short window, often at night or on the weekend, with a rollback plan.
When does migration become profitable?
As soon as module costs, slowness and functional limits cost you more than amortizing custom. Often a 10-15% conversion gain is enough to pay back in under a year.
What happens to my customer data and history?
It's fully migrated: accounts, terms, credit and order history, after a quality audit to clean up PrestaShop duplicates.
Let's scope your project. Send us your SKU count, number of customer accounts and ERP, and we'll price the migration and its SEO plan. 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.