Client Portal Development Cost for B2B Companies in Dublin (2026)

The verdict in three sentences

A custom client portal for a services SME costs between EUR 12,000 and EUR 25,000 for an MVP, and EUR 30,000 to EUR 60,000 for a full version with roles, workflows and integrations. The number-one cost driver is not design, it is the functional scope: authentication, document management, invoicing and notifications. Expect 8 to 16 weeks of development and maintenance of 8 to 15 % of the initial budget per year.

What a client portal covers, from MVP to full build

A client area gives your customers secure access to their documents, invoices and case tracking. The price gap comes from the number of modules and the level of automation. An MVP focuses on three building blocks: secure login, document viewing and invoice display. The full version adds multiple roles, automatic notifications, e-signature and a connection to your billing tool.

Custom build or SaaS: the right trade-off

A client-portal SaaS subscribes for EUR 40 to 250/month depending on user count, but you stay dependent on the vendor's feature catalogue and pricing policy. Custom costs more upfront but is yours: no per-seat subscription, native integration with your tools, free evolution.

Mini case study

Thomas, director of a 22-person HR consulting SME in Dublin, manages 140 active clients. His assistants spend around 6 hours per week emailing invoices and documents. At a loaded cost of EUR 28/hour, that is EUR 168/week, or EUR 8,064/year. He invests EUR 21,000 in an intermediate portal (roles + notifications + invoices). The portal removes 80 % of these manual sends, saving EUR 6,451 per year. With EUR 3,200 of annual maintenance, the return on investment lands in about 3.2 years, not counting the professional image and reduced client follow-ups.

FAQ

How much does the cheapest client portal cost? A functional MVP starts at EUR 12,000 in 2026: authentication, document area and read-only invoices. That is enough to validate usage before investing further.

What is the timeline for a custom client portal? Expect 8 to 16 weeks depending on scope: 8 to 10 weeks for an MVP, 13 to 16 for a full version with payment and integrations. Add 2 to 3 weeks of acceptance testing.

Should I budget for maintenance? Yes. Maintenance covers security, fixes and small enhancements, between 8 and 15 % of the initial budget per year, roughly EUR 1,000 to 9,000 depending on portal size.

Custom or SaaS for a small SME? With fewer than 20 users and standard needs, a SaaS at EUR 40-250/month is often enough. Beyond that, or if you want to integrate billing and own your data, custom becomes cost-effective.

Can we start small then scale? Absolutely. Best practice is to ship an MVP at EUR 12,000-18,000, measure adoption, then add roles, notifications and payment in 4 to 6-week iterations.

Let's scope your project. Share your client count, the modules you want (documents, invoices, payment) and your indicative budget: we frame an MVP or a full version to fit. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.