What Does Custom Web Application Development Cost in Germany?
For German SMEs, custom web applications typically land at €15,000–€40,000 for internal tools, €30,000–€80,000 for customer portals, and €80,000–€250,000+ for complex platforms. What moves the number isn't how many screens the mockup has — it's user roles, integrations with your ERP/CRM, compliance and data migration.
One framing note up front: this post is for established companies digitizing a process or opening a portal to their customers. If you're a startup building a product from scratch, read our MVP cost breakdown instead — the economics are different.
What does a custom web application cost?
The ranges we see across SME projects, at boutique rates of €95–€160 per hour:
| Project type | Typical range | Duration |
|---|---|---|
| Internal tool (replaces Excel + email workflows) | €15,000–€40,000 | 6–10 weeks |
| Customer portal (orders, documents, status) | €30,000–€80,000 | 2–4 months |
| Booking or self-service platform | €50,000–€120,000 | 3–6 months |
| Complex platform (multi-tenant, deep ERP integration) | €80,000–€250,000+ | 4–9 months |
The spread inside each row isn't negotiation room. It's the four drivers below.
What actually moves the price?
User roles and permissions. "Everyone sees everything" is cheap. "Sales sees their customers, accounting sees invoices, team leads approve, auditors read everything" adds weeks of data modeling, testing and edge cases — and most SME projects need exactly that.
Integrations with existing systems. A modern API takes days to connect. A fifteen-year-old on-premise ERP with a CSV export and no documentation takes weeks — and it's usually the reason the project exists in the first place. Get integration effort quoted explicitly, not as a line item called "interfaces".
Compliance. GDPR deletion concepts, audit trails, data processing agreements with every subprocessor. This is real engineering work, not paperwork, and it scales with how sensitive your data is.
Data migration. Ten years of grown Excel data comes with duplicates, encoding problems and conventions nobody wrote down. Budget it as its own work package or it quietly eats your buffer.
Why "we just need a simple portal" is never simple
The visible portal is a login and three pages. The invisible part is the baseline every serious web application carries: authentication with password reset and two-factor, role management, an audit trail of who changed what, error monitoring, and admin screens so your team can manage users without calling the agency. In our experience that foundation alone is €10,000–€15,000 of work before the first business feature ships.
That's why credible quotes for "a simple customer portal" start around €30,000 — and why the €8,000 offer usually ends, a year later, in a rewrite that costs the difference twice over.
We scope portals and internal tools as fixed 4–12 week projects with a price you know up front — see our MVP development service for how that works.
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