The verdict in three sentences
A redesign without an SEO migration plan typically loses 30 to 60 % of organic traffic in the weeks after launch. The migration scope (audit, 301 redirects, preserving tags and structure, monitoring) represents 1,900,000 to 4,500,000 FCFA (approx. 2,900-6,900 EUR) in a 2026 redesign project. It is an insurance policy: its cost is far below the revenue loss a ranking drop would cause.
The SEO migration budget
Here are 2026 ranges, in FCFA, for the migration scope alone (excluding redesign design and development).
| SEO migration service | 2026 price (FCFA) | Objective |
|---|---|---|
| Audit + crawl of current site | 500,000-1,200,000 | Map URLs, rankings, backlinks |
| 301 redirect plan | 800,000-1,800,000 | Exhaustive mapping table |
| Preserving tags + structure | 600,000-1,500,000 | Title, Hn, structured data, linking |
| Post-launch monitoring (4-12 wks) | 400,000-1,000,000 | GSC monitoring, fixes |
Migration scope total: 2,300,000 to 5,500,000 FCFA depending on site size (number of URLs, linking depth, volume of backlinks to preserve).
The pre-launch checklist that prevents damage
| Checkpoint | Risk if neglected | Priority |
|---|---|---|
| Complete 1:1 301 redirect table | 404 errors, lost SEO equity | Critical |
| Preserving high-traffic URLs | Direct ranking drop | Critical |
| Title/meta tags carried over | Lower CTR and ranking | High |
| Structured data migrated | Loss of rich snippets | High |
| XML sitemap updated + submitted to GSC | Slow reindexing | High |
| robots.txt checked (no blocking) | Total deindexing | Critical |
| Mobile + Core Web Vitals test | Mobile-first demotion | Medium |
| Backlinks pointing to valid URLs | Loss of authority | High |
The most dangerous item remains a staging robots.txt left live: it can deindex the whole site in days. A single oversight on a high-traffic site costs more than the entire migration budget.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Mr Diop, digital lead of a consulting firm in London, redesigns a site that generates 14,000 organic visits/month, the source of about 30 monthly leads each worth ~150,000 FCFA of margin. Without a migration plan, a 45 % traffic drop over 3 months would mean ~40 lost leads, i.e. ~6,000,000 FCFA of margin. He invests 3,200,000 FCFA in the SEO migration scope (audit, redirects, monitoring). Result: a temporary dip of only 8 % in week one, fully recovered in 6 weeks. The migration budget pays for itself several times over in the first quarter after launch.
FAQ
How much traffic can you lose in a poorly managed redesign? Typically 30 to 60 % within 4 to 8 weeks, sometimes more if URLs change without redirects. With a solid plan the loss stays below 10 % and recovers in 4 to 12 weeks.
Are 301 redirects enough to protect everything? They are necessary but not sufficient. You must also carry over tags, preserve content structure, migrate structured data and monitor Google Search Console after launch.
How long to recover rankings? Between 4 and 12 weeks for a well-executed migration. Google must recrawl, understand the redirects and re-evaluate the new site. Patience and monitoring are key.
Should you keep the old URLs? Ideally yes for high-traffic or high-backlink pages. If the new structure requires change, an exact 301 redirect (1:1, never to the homepage only) preserves most of the SEO equity.
When should migration prep start? At the beginning of the redesign project, not the end. The audit and redirect plan must be ready before development, and tested in staging before the switch.
Let's scope your project. Send us your current site URL and the redesign scope: we will audit your rankings and price a secure SEO migration 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.
