The verdict in three sentences
A site's sticker price says nothing about its real cost: WordPress wins year one, custom catches up over 3 years. The true trade-off is about technical debt, the plugin attack surface and scalability — not the initial invoice. Choose WordPress for a standard, stable need; go custom the moment business logic or performance becomes a competitive advantage.
The 3-year TCO, line by line
Total cost of ownership (TCO) adds up the initial build, annual maintenance, security and evolutions. The figures below are a 2026 order of magnitude for a professional 15-25 page showcase site.
| Item | WordPress | Custom (Next.js) |
|---|---|---|
| Initial build | 6,000 EUR | 18,000 EUR |
| Maintenance / year | 1,200 EUR | 900 EUR |
| Plugins & licenses / year | 600 EUR | 0 EUR |
| Security & patches / year | 600 EUR | 900 EUR |
| Total annual recurring | 2,400 EUR | 1,800 EUR |
| 3-year TCO | 13,200 EUR | 23,400 EUR |
| 5-year TCO | 18,000 EUR | 27,000 EUR |
Over 3 years WordPress stays cheaper (13,200 EUR vs 23,400 EUR). But the curve flips from year 7, because WordPress recurring costs grow with plugin count and breaking updates.
Technical debt and security: the invisible cost
An average WordPress site ships with 18 to 25 plugins. Each plugin is an external dependency, a vulnerability risk and a source of update conflicts. Custom cuts that surface to near zero.
| Criterion | WordPress | Custom |
|---|---|---|
| Third-party dependencies | 18-25 plugins | 0-3 libraries |
| Critical vulnerabilities / year (avg) | 3 to 6 | < 1 |
| Major update time | 4-8 h | 1-2 h |
| Plugin conflict risk | High | None |
| Performance LCP (mobile) | 2.8-4.0 s | 0.9-1.6 s |
| Business-logic customization | Limited | Total |
WordPress vulnerabilities account for the bulk of website hacks in 2026, almost always via an unpatched plugin. WordPress itself isn't fragile — its open ecosystem is.
Mini case study
Marc runs a 40-employee industrial SME in Nantes. His 2021 WordPress site runs 22 plugins; he pays 2,400 EUR/year and suffered 2 security incidents in 18 months (11,000 EUR of combined recovery). Over 5 years his real WordPress TCO reaches 6,000 + (2,400 x 5) + 11,000 = 29,000 EUR. A custom site would have cost 18,000 + (1,800 x 5) = 27,000 EUR, without the two incidents. Bottom line: once maintenance slips or security is critical, custom becomes the cheaper option, not the pricier one.
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FAQ
Is WordPress really cheaper long term?
Only the first 5-6 years for a simple, stable need. Beyond that, accumulating plugins, licenses and breaking updates push recurring costs above 2,400 EUR/year, and custom becomes competitive.
Is custom maintainable without the original agency?
Yes, if the code is documented and standard (Next.js, React, git). Demand repository ownership transfer and technical documentation. It's the opposite of a WordPress site locked into a proprietary premium theme.
Can we migrate from WordPress to custom gradually?
Yes, via a headless or hybrid approach: keep WordPress as the content back-office and rebuild the front end. Budget 15,000 to 40,000 EUR depending on scope.
What maintenance budget should we plan year one?
Between 1,800 and 2,400 EUR/year depending on technology, excluding functional evolutions. A clear contract must list security, backups, updates and included evolution hours.
How do I know if my need justifies custom?
If your site carries business logic (configurator, client portal, ERP integrations) or if performance is a commercial lever, custom pays off. For a classic showcase, WordPress is enough.
Let's scope your project. Send us your current site, your indicative budget and your horizon (3 or 5 years): we'll cost the compared TCO of both options. 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.
