The verdict in three sentences
In 2026, a B2B e-commerce redesign is justified not by aesthetics but by conversion and performance. The levers that pay off are rethought UX, Core Web Vitals > 90 and reliable ERP integration. Budget 20,000 to 80,000 EUR excl. tax for an expected conversion uplift of 15 to 30% over 4 to 8 months.
Redesign cost breakdown
The budget splits across design, development, data migration and integrations. ERP integration is often the most underestimated item.
| Item | Share of budget | Indicative 2026 cost |
|---|---|---|
| UX / UI design | 15-25% | 4,000-18,000 EUR |
| Front + back development | 30-40% | 8,000-32,000 EUR |
| Catalog / data migration | 10-20% | 3,000-15,000 EUR |
| ERP / B2B pricing integration | 15-25% | 4,000-18,000 EUR |
| QA / SEO / performance | 10-15% | 2,500-10,000 EUR |
| Redesign total | 20,000-80,000 EUR excl. tax |
Migration or redesign: which call?
Migrating means switching platform while keeping the existing experience; redesigning means rethinking it. Often you combine both.
| Criterion | Migration only | Full redesign |
|---|---|---|
| Objective | change tool | improve conversion |
| Indicative cost | 8,000-40,000 EUR | 20,000-80,000 EUR |
| Timeline | 6-12 weeks | 4-8 months |
| Conversion uplift | low | +15-30% |
| SEO risk | high (301s) | controlled if planned |
| When to choose | obsolete tool | flat conversion |
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Julien, e-commerce director of a B2B supplier in Lyon, runs 1.4M EUR of online revenue at a 1.8% conversion rate. A 55,000 EUR redesign targets +25% conversion, lifting the rate to 2.25%. At constant traffic, that adds about 350,000 EUR of annual revenue. ROI is reached in under 3 months of operation, excluding performance and loyalty gains.
FAQ
What budget for a B2B redesign in 2026? From 20,000 to 80,000 EUR excl. tax depending on catalog size and integrations. ERP integrations and B2B pricing rules push the budget up.
How long does a redesign take? From 4 to 8 months, including design, development, migration and QA. A redesign with complex ERP integration sits closer to 6-8 months.
What conversion uplift to expect? A well-run redesign targets +15 to +30% conversion via rethought UX and Core Web Vitals > 90. It is the main ROI driver.
Should you redesign or migrate? Migrate if your only problem is an obsolete tool; redesign if conversion is flat. The two often combine into a single project.
How do you protect SEO during the redesign? With an exhaustive 301 redirect plan and SEO QA before go-live. It is the item that prevents a 20-to-40% traffic drop.
Let's scope your project. Share your online revenue, conversion rate and integrations, and we will price the redesign and its expected ROI. 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.
