Why a website can cost so much1,500 for a freelancer,6,000 in a branchor25 000€ for a corporate project?

In 2026, the price of a website will depend on10 key factors.
Understanding these elements will help you :

• assess whether a quote is coherent,

• avoid pitfalls,

• define a realistic budget,

• make an informed choice between WordPress, Webflow, Astro or custom.

Here's a clear, practical guide to what really makes a price change.

How much will a website cost in Belgium in 2026?

1. Number of pages

The more pages a site contains, the longer it takes to design, integrate and optimize.

Examples:

• 5 pages → 1 500€ - 3 000€

• 15 pages → 3 500€ - 7 000€

• 30 pages → 8 000€ - 15 000€

Each additional page can represent+100€ à +500€depending on its complexity (detailed service, optimized landing page, local SEO page...).

2. Design level (template vs. custom)

This is one of the most decisive factors.

Template

• fast

• economic

• limited
  → ideal for small budgets

Design sur-mesure

• unique experience

• high conversion level

• strong consistency with branding
  → +30 to +80% on the final price

Design often represents40% of total budget a professional website.

3. Functional complexity

The more advanced features a site offers, the higher the bill.

Features that add cost :

• reservation system → €1,000 to €3,000

• customer space / B2B portal → +€2,000 to +€8,000

• advanced forms → +€300 to €1,200

• product configurator → +€2,000 to +€10,000

• automatisations (emails, workflows) → +500€ à +4 000€

• chatbot IA → +1 000€ + monthly subscription

This brings us closer to amini logicielnot a simple site.

4. Integrated SEO (from basic to advanced)

Basic SEO (included in 90% of projects)

• structure correcte

• title tags

• performance acceptable

Advanced SEO

• keyword study

• logical architecture

• optimized writing

• thematic clustering

• optimisation Core Web Vitals

Additional cost :+1 000€ à +6 000€

A site designed to rank costs more... but earns more.

5. Multilingualism

Adding a language doesn't double the price - but it doesmultiplies from +20% to +40%.

Why?

• more pages,

• duplications,

• Specific URLs,

• Multilingual SEO,

• design consistency,

• structural work.

Example:
FR site: €4,000
Site FR + EN + NL : 6 000€ - 11 000€

6. External integrations (CRM, ERP, accounting)

Each technical connection costs between1,000 and €4,000according to :

• aPI quality,

• the level of documentation,

• the desired synchronization,

• number of calls (stock, customers, orders, etc.).

Common examples:

• CRM (HubSpot, Pipedrive)

• ERP (Odoo, SAP)

• accounting (Exact, WinBooks)

• e-mailing (Brevo, Klaviyo)

7. Performance (Core Web Vitals)

In 2026, performance is no longer optional:
it influences SEO, conversions and credibility.

Butget a 90+ site on Lighthouse request :

• asset optimization,

• clean architecture,

• javaScript reduction,

• optimized images,

• hosting performant.

This is one of the reasons why Numinam usesAstrowhich generates ultra-fast websites.

Additional effort: +15% to +40% of budget.

8. The choice of technology

The more modern & efficient the technology → the higher the quality → the higher the initial cost.
But the long-term costdiminue (reduced maintenance, fewer bugs, better performance).

9. Type of service provider (freelance, agency, expert studio)

Freelance

• economic
  - limited skills
  - disponibilité variable

Typical price: €1,000 - €4,000

Generalist agency

• good structure

• services multiples
  - sometimes slow
  - not always a tech expert

Typical price: €3,000 - €12,000

Studio expert (Numinam)

• performance

• modern stack (Astro, IA)

• ROI-driven

• premium quality

Typical price: €4,000 - €20,000

10. Maintenance, support and evolution

A website isnot a one-off cost.
Recurring costs also influence the starting price.

Maintenance 2026 :

• WordPress: €100 - €500/month

• Webflow : 20€ - 80€/mois

• Astro (Numinam): 0€ - 150€/month (very low, no server vulnerabilities)

• Upgrades: €500 - €5,000/year depending on ambitions

→ For more details: Recurring website costs (/cout-maintenance-site-web)

Examples of budgets by type of company in Belgium

Freelance

1 500€ - 3 000€
Simple site + basic SEO

SMEs (10 to 50 employees)

3 000€ - 8 000€
Professional website + SEO + customized design

Established SME / B2B

8 000€ - 20 000€
Advanced SEO + performance + integrations

Large companies

20 000€ - 50 000€+
Complex architecture + multilingual + customized

Mistakes to avoid

• choose solely on the basis of price,

• underestimate SEO,

• forget evolution costs,

• neglect performance,

• choose WordPress out of habit, not strategy.

Working with Numinam: what does it change?

Numinam develops websites:

• ultra-fast (Astro),

• optimized for SEO right from the design stage,

• designed for conversion,

• secure (no server faults),

• scalables,

• withIntegrated AI when it brings real value.

Typical budget :3 000€ - 15 000€

→ Request a free audit :contact@numinam.com