The verdict in three sentences
A client portal (extranet) is not a website: it is a secure application where your clients log in to view documents, invoices and tickets. In Amsterdam in 2026, budget EUR 35,000 to 90,000 depending on modules and the level of integration with your CRM/ERP, over a 3 to 5 month timeline. The real trade-off is on integrations (SSO, CRM, billing): they make up 40 to 60 % of the budget and determine real adoption by your clients.
The modules that make up a portal
A performing extranet is assembled from building blocks. Each has its own cost and timeline; you only pay for those that serve your client relationship.
| Module | 2026 cost (EUR) | Timeline |
|---|---|---|
| Authentication + SSO | 5,000 - 12,000 | 2 - 4 wks |
| Document space (DMS) | 6,000 - 14,000 | 3 - 5 wks |
| Billing / payments | 7,000 - 16,000 | 3 - 6 wks |
| Tickets / support | 5,000 - 11,000 | 2 - 4 wks |
| CRM/ERP integration | 8,000 - 20,000 | 4 - 8 wks |
| Client dashboard | 4,000 - 10,000 | 2 - 4 wks |
Add the chosen modules, add 10 to 15 % for acceptance testing and hosting, and you get your target budget. A "complete" portal (all six blocks) naturally lands in the upper range, around EUR 80,000 to 90,000.
Security, hosting and compliance in 2026
An extranet exposes client data: compliance is not optional. In 2026, require hosting within the European Union (GDPR), robust SSO, and encryption of documents at rest.
| Item | 2026 standard | Indicative cost |
|---|---|---|
| Managed EU hosting | OVH / Scaleway / AWS eu | EUR 200 - 700/mo |
| SSO (SAML/OIDC) | included in build | EUR 5,000 - 12,000 |
| Backups + monitoring | daily, 99.9 % | EUR 100 - 400/mo |
| Initial security audit | recommended | EUR 3,000 - 8,000 |
| Annual maintenance | 15 - 18 % of build | variable |
Neglecting EU hosting exposes you to GDPR risk and to rejection by the procurement departments of your large-account clients.
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Mini case study
Sophie is COO of a B2B services SMB in Amsterdam, 60 employees, 300 active clients. She wants an extranet: SSO, document space, online billing, tickets. Scoped: SSO 9,000, DMS 11,000, billing 14,000, tickets 9,000, dashboard 7,000, i.e. EUR 50,000 of build over 4 months, plus EUR 450/month for EU hosting and monitoring. By eliminating the manual sending of 300 invoices/month and 40 % of support calls (redirected to tickets), she saves the equivalent of 0.7 FTE, roughly EUR 32,000/year. Return on investment in under 20 months, excluding brand gain.
FAQ
How much does a complete client portal cost in 2026? An extranet with SSO, documents, billing, tickets and CRM integration sits between EUR 70,000 and 90,000 in Amsterdam. A simpler portal (documents + tickets) starts around EUR 35,000.
Is CRM integration really necessary? It avoids double entry and guarantees up-to-date data on the client side. It is the most expensive module (EUR 8,000 to 20,000) but the one that pays off the portal by removing manual work.
Where to host an extranet in 2026? Within the European Union for GDPR compliance: OVH, Scaleway or an eu region of AWS/Azure. Budget EUR 200 to 700/month depending on traffic and backups.
How long to deliver? 3 to 5 months depending on the number of modules and integration complexity. SSO and CRM integration are the items that lengthen the timeline most.
What maintenance budget to plan? Budget 15 to 18 % of build cost per year, plus hosting. For a EUR 50,000 portal, plan EUR 7,500 to 9,000/year of support.
Let's scope your project. List the modules you want (SSO, documents, billing, tickets, CRM), your client volume and your timeline, and we will price a portal module by module with EU hosting. 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.
