The verdict in three sentences
The initial quote represents only 40 to 60 % of a website's total cost over 3 years: the rest is hidden in maintenance, SEO and changes. In 2026 in New York, a site with an 18,000 EUR build can reach 35,000 to 55,000 EUR of TCO over 36 months depending on SEO ambition. Modelling the TCO upfront avoids budget surprises and makes quotes truly comparable.
The 2026 TCO line items
| Item | 2026 range | Frequency |
|---|---|---|
| Initial build | 10,000-30,000 EUR | One-off |
| Hosting / CDN | 30-90 EUR/month | Recurring |
| Support (maintenance) | 150-500 EUR/month | Recurring |
| SEO / content | 900-3,000 EUR/month | Recurring (optional) |
| Changes | 3,000-8,000 EUR/year | Annual |
| Licences / plugins | 300-1,200 EUR/year | Annual |
Recurring items, cumulated over 36 months, often exceed the build. SEO is the biggest lever: optional but decisive for pipeline, it can alone double the TCO while generating the best ROI.
Cumulative cost over 36 months
| Scenario | Build | 36-month recurring | Total TCO | Hidden share |
|---|---|---|---|---|
| Lean brochure site | 12,000 EUR | 8,600 EUR | ~20,600 EUR | 42 % |
| B2B site + support | 18,000 EUR | 16,200 EUR | ~34,200 EUR | 47 % |
| B2B site + active SEO | 18,000 EUR | 43,200 EUR | ~61,200 EUR | 71 % |
The active-SEO scenario shows the hidden share can exceed 70 %: not overspend but investment, if SEO generates measurable pipeline. The CFO must separate sunk cost (hosting, support) from investment cost (SEO, changes).
Mini case study
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Anthony, CFO of an industrial SME in New York, receives an 18,000 EUR quote for a B2B site. He models the TCO: +250 EUR/month support, +60 EUR/month hosting and 1,800 EUR/month SEO. Over 36 months, the TCO reaches 18,000 + 9,000 (support) + 2,160 (hosting) + 43,200 (SEO) = ~72,360 EUR. But SEO generates 40 leads/month at 500 EUR margin, i.e. 240,000 EUR over 3 years. The net ROI of the SEO line is 5.5x: Anthony budgets the full TCO and approves the investment.
FAQ
Why isn't the initial quote enough to budget? Because it only covers the build (40-60 % of TCO). Hosting, support, SEO and changes make up the rest and must be provisioned from the start.
What share does maintenance represent over 3 years? Support alone weighs 5,400-18,000 EUR over 36 months (150-500 EUR/month). It is an unavoidable sunk cost for a strategic site.
Should SEO be part of the TCO? Yes, but as investment, not overhead. At 900-3,000 EUR/month, it inflates the TCO but generates the best ROI if pipeline is measured.
How can I reduce the TCO without losing quality? Choose a lean stack (fewer paid plugins), pool hosting and size support to real criticality. Possible saving: 15-25 % on recurring costs.
Over what horizon should I model the TCO? 36 months minimum, as it is the average site lifespan before a redesign. Beyond that, plan a partial redesign budget (30-50 % of the initial build).
Let's scope your project. Send us your build quote and SEO ambitions: we'll model your full 36-month TCO, line by line. 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.
