The verdict in three sentences
An industrial WordPress site with a 4.8 s LCP and a 68% bounce rate loses quote requests every month that your sales team will never see. A Next.js migration costs 9,000 to 18,000 EUR excluding VAT for 40 to 120 pages, in 8 to 10 weeks, targeting an LCP under 2 s. The SEO risk is real but manageable if 100% of URLs are 301-redirected and monitored for 90 days.
Why your WordPress is slow, and what Next.js changes
On industrial websites, slowness rarely has a single cause: a heavy theme, 30 to 50 plugins, product pages with uncompressed PDFs and photos, and shared hosting at 15 EUR per month. Next.js serves static or pre-rendered pages, optimises images to WebP or AVIF and only loads the JavaScript that is actually needed.
| Metric | Current WordPress | Next.js target | Expected effect |
|---|---|---|---|
| Mobile LCP | 4.8 s | Under 2 s | Better Core Web Vitals ranking |
| INP | 350 ms | Under 200 ms | More responsive forms |
| Average page weight | 4.2 MB | 0.9 MB | Loads properly on site-office 4G |
| Bounce rate | 68% | 45 to 52% | More pages per visit |
| Plugins to maintain | 38 | 0 | Fewer security holes |
| Hosting cost | 25 EUR per month | 20 to 60 EUR per month | Stable, with CDN |
Migration budget by site size
| Scope | Pages migrated | Budget excl. VAT | Timeline |
|---|---|---|---|
| Industrial showcase | 40 pages | 9,000 to 11,000 EUR | 8 weeks |
| Product range catalogue | 70 pages | 12,000 to 14,500 EUR | 9 weeks |
| Catalogue and simple configurator | 100 pages | 15,000 to 16,500 EUR | 10 weeks |
| Bilingual DE and EN | 120 pages | 16,500 to 18,000 EUR | 10 weeks |
| 301 redirect plan and SEO QA | Included | Included | 1 dedicated week |
| Post-launch maintenance | All | 150 to 300 EUR per month | Ongoing |
Your marketing team keeps an editable CMS through a headless CMS (Sanity, Strapi or Payload). Product sheets, news and job offers are migrated by script, not copied by hand.
Price the SEO risk before you sign
A poorly prepared migration can cost 20 to 40% of organic traffic for 3 to 6 months. The essential safeguards: a full export of existing URLs from Search Console and a crawler, a redirect map validated line by line, keeping title tags and ranking content, launching outside your peak sales period, and weekly ranking checks for 90 days. With this protocol, the temporary dip usually stays under 5 to 10% and recovers within 4 to 8 weeks.
Mini case study
Anna, sales director of a 60-employee metal fabrication SME in Berlin, currently receives 40 quote requests per month through the website. Migrating 70 pages costs 13,500 EUR plus 200 EUR per month. With a conservative 25% uplift, the site brings 10 more requests per month. Her close rate is 15% and the average deal is 9,000 EUR, so 1.5 extra orders per month and about 13,500 EUR of additional monthly revenue. At a 30% margin, the project pays back in just over 3 months.
Need a professional website?
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FAQ
Will we lose our Google rankings by leaving WordPress?
Not if every old URL points to its new page with a 301. On our migrations, the temporary dip usually stays under 10% and traffic exceeds the previous level within 2 to 3 months thanks to speed.
Can our team still edit the site?
Yes. The headless CMS offers an editing interface comparable to WordPress. A 2-hour training session is enough to publish news, products and job offers.
Why not just optimise the existing WordPress?
A 2,000 to 3,000 EUR optimisation can bring LCP from 4.8 s down to about 3 s. Getting under 2 s with 38 plugins is rarely sustainable.
How long before we can measure the gain in quote requests?
Allow 8 to 12 weeks after launch for a reliable measurement, while Google recrawls the site and seasonality evens out.
Does the budget include migrating technical PDF sheets?
Yes, up to 200 documents in the packages shown. Beyond that, allow about 4 EUR per file for classification and optimisation.
Let's scope your project. Send us your site URL and page count, and we will run a speed audit and a migration budget with an 8 to 10 week 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.
