The verdict in three sentences
When a WordPress site piles up more than 10 plugins and repeated security incidents, the hidden maintenance cost quickly exceeds the cost of migrating. Moving to Next.js with a headless CMS costs EUR 12,000 to 30,000 for an industrial SMB, takes 8 to 12 weeks, and makes the site 2 to 3 times faster. The only real risk is SEO, and it is controlled with a complete 301 redirect plan covering all 450 URLs, tested before cutover.
Stay on WordPress, go headless or rebuild: the decision grid
Not every SMB needs to leave WordPress. The decision depends on attack surface, editorial needs and the cybersecurity requirements of your key customers (increasingly common in the aerospace supply chain).
| Situation | Hardened WordPress | Headless WordPress + Next.js | Next.js + dedicated headless CMS |
|---|---|---|---|
| Number of plugins | < 8 | 8 to 15 | > 15 or page builder |
| Security incidents in 12 months | 0 | 1 | 2 or more |
| Editors used to WordPress | Yes | Yes, interface is kept | 2-hour training is enough |
| 2026 budget excl. VAT | EUR 3,000 to 8,000 | EUR 10,000 to 22,000 | EUR 12,000 to 30,000 |
| Timeline | 2 to 4 weeks | 6 to 10 weeks | 8 to 12 weeks |
| Speed gain | +20 to 40% | x2 to x3 | x2 to x3 |
| Annual maintenance | EUR 1,500 to 3,000 | EUR 1,200 to 2,500 | EUR 800 to 2,000 |
For an industrial corporate site with a capabilities catalogue, news, job openings and certification pages (EN 9100, ISO 9001), the third column is often the healthiest: the public site becomes static, with no exposed database, which removes most of the attack surface.
What each building block costs in 2026
| Item | Range excl. VAT | Note |
|---|---|---|
| Scoping and mapping of 450 URLs | EUR 1,500 to 3,000 | Search Console export, crawl, 301 matrix |
| Design and templates (10 to 15) | EUR 3,000 to 8,000 | Existing brand guidelines can be reused |
| Next.js development | EUR 5,000 to 13,000 | Static rendering, forms, search |
| Content migration | EUR 1,500 to 4,000 | Automated script + manual review |
| Headless CMS (Sanity, Strapi, Payload) | EUR 0 to 300/month | Free when self-hosted or at low volume |
| Hosting (Vercel, Netlify, OVH) | EUR 0 to 150/month | CDN included |
| QA, 301s and 60-day monitoring | EUR 1,000 to 2,000 | Staging tests are mandatory |
Compare this with the real cost of the current setup: premium plugin licences (EUR 400 to 1,200 per year), monthly updates (EUR 1,500 to 3,000 per year) and post-hack clean-up (EUR 1,000 to 4,000 per incident, not counting the reputational damage with customers).
The 6-step SEO migration plan
- Inventory: full crawl, export of the last 16 months of Search Console data, identification of the 50 URLs that carry 80% of traffic.
- 301 matrix: every old URL points to its exact equivalent, never bulk-redirected to the homepage.
- Content parity: titles, meta tags, structured data and internal links kept identical or improved.
- Staging: automated test of all 450 redirects, no chain longer than one hop.
- Cutover: go live on a Tuesday morning, submit the new sitemap, monitor 404 errors in real time.
- 60-day monitoring: a temporary 5 to 10% dip is normal in the first 3 weeks, then the speed gain takes over.
Mini case study
Pieter, IT director of a 60-employee aerospace subcontractor near Amsterdam, suffered two hacks in 2025: EUR 3,200 of clean-up in total and 4 days offline. He pays EUR 900 a year for premium plugins and EUR 2,400 for maintenance.
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He chooses a Next.js + Sanity migration at EUR 21,000, delivered in 10 weeks. Mobile load time drops from 5.6 s to 1.9 s. Recurring costs fall to EUR 1,400 a year for hosting and maintenance, versus EUR 3,300 plus incidents. Over 5 years, the running-cost saving is about EUR 9,500, excluding the avoided security risk. The decisive argument lies elsewhere: the cybersecurity questionnaire from a major customer is now compliant.
FAQ
Will we lose our rankings during the migration?
A 5 to 10% dip for 2 to 3 weeks is common, then traffic returns and often exceeds the previous level thanks to speed. A lasting loss only happens when redirects are incomplete.
Can our team edit the site without a developer?
Yes. A headless CMS such as Sanity or Payload offers an editing interface as simple as WordPress. A 2-hour training session is enough to publish news, job openings and product pages.
Why Next.js rather than another framework?
Next.js is mature, widely used (easy hiring) and handles both static and server rendering. For a 50 to 500-page site, it offers a good balance of performance, cost and longevity over 5 to 7 years.
Can we migrate in stages?
Yes, through headless WordPress: you keep the WordPress admin and replace the public site first. This approach spreads the budget over 2 financial years, with a first phase around EUR 10,000 to 14,000.
How long does a 450-URL site take?
Allow 8 to 12 weeks from scoping to launch, including 2 weeks reserved for QA and redirect testing.
Let's scope your project. Send us your WordPress site URL and we will price the migration (EUR 12,000 to 30,000 depending on scope), the redirect plan and the cutover schedule. 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.
