The verdict in three sentences
A custom customer portal costs, in 2026, between 20,000 and 45,000 EUR for a useful MVP and 50,000 to 120,000 EUR for a full platform with SSO and integrations. The return shows up mostly in avoided support load: a 30 % drop in inbound calls and emails is a realistic order of magnitude within the first year. The real question is not the purchase price but the 3-year total cost of ownership, hosting and enhancements included.
What each tier covers
The scope of a client portal varies hugely. An MVP usually limits itself to authentication, invoice viewing and document upload. A full version adds ticket management, notifications, a dashboard, SSO and connections to your ERP or CRM.
| Tier | Functional scope | 2026 cost (EUR) | Timeline |
|---|---|---|---|
| MVP | Auth, invoices, documents, profile | 20,000 - 45,000 | 3 - 4 months |
| Standard | + tickets, notifications, dashboard | 45,000 - 70,000 | 4 - 5 months |
| Full | + SSO, online payment, ERP API | 70,000 - 120,000 | 5 - 6 months |
| Extended custom | + business modules, multi-language, fine-grained roles | 120,000+ | 6 months+ |
These prices assume an experienced team (product, design, full-stack dev) and serious scoping. A far lower quote often hides a generic template that is hard to evolve.
The 3-year total cost of ownership
Development price is only the visible part. Hosting, corrective maintenance, security updates and functional enhancements weigh every year. Here is an estimate, 2026 order of magnitude, for a standard version at 60,000 EUR upfront.
| Item | Year 1 | Year 2 | Year 3 |
|---|---|---|---|
| Initial development | 60,000 | 0 | 0 |
| Infrastructure hosting | 3,600 | 3,600 | 3,600 |
| Maintenance (15 %/yr) | 9,000 | 9,000 | 9,000 |
| Enhancements | 6,000 | 8,000 | 10,000 |
| Annual total | 78,600 | 20,600 | 22,600 |
That is a 3-year TCO of roughly 121,800 EUR. This figure is the basis for an honest comparison with a SaaS subscription, which looks cheaper at first but climbs with the number of users.
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Mini case study
Take Julien, CEO of an IT services SME in Nantes, 40 employees, 350 active clients. His support team handles about 900 requests per month (invoices, access, ticket follow-up), the equivalent of 1.5 FTE at a loaded 42,000 EUR per year, roughly 63,000 EUR/year.
By deploying a self-service portal at 60,000 EUR, he targets -30 % of requests, i.e. 270 avoided requests per month. That frees about 0.45 FTE, or 28,000 EUR/year saved. The portal pays for itself in just over 2 years on that item alone, before counting client satisfaction and longer retention.
FAQ
Is a custom customer portal really more expensive than a SaaS? Upfront, yes: 60,000 EUR versus a few hundred euros a month. But beyond 40 to 60 active users, the SaaS can exceed 1,500 EUR/month, and custom becomes competitive over 3 years while remaining your property.
How long to deliver a first version? Budget 3 to 4 months for an MVP usable in production, including scoping, design, development and acceptance testing. A gradual rollout by batches of clients reduces risk.
Can the portal connect to our ERP or CRM? Yes, and that is the main benefit of custom. Plan 8,000 to 20,000 EUR depending on the available APIs and the number of flows (invoices, contracts, tickets) to synchronise.
How do we secure client access? Strong authentication, optional SSO and data encryption are standard in 2026. A light security audit costs 5,000 to 10,000 EUR and is warranted as soon as you handle financial data.
What maintenance budget should we plan? A healthy rule: 15 to 20 % of the development cost per year, roughly 9,000 to 12,000 EUR for a 60,000 EUR base, hosting billed separately.
Let's scope your project. Tell us your client volumes, your flows (invoices, tickets, documents) and your indicative budget: we will scope the right MVP or full tier. 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.
