When UK small businesses ask us how long a client portal takes and what it costs, the honest answer is "depends" — but not in the unhelpful way. There are predictable patterns. Here's how we'd answer the question if you were sitting across from us.
The standard timeline
For a standard client portal — authentication, role-based access, document upload and exchange, basic admin tools — we typically deliver in 2-3 weeks from signed scope. That's a realistic full-build, not a stripped-down demo.
The week-by-week pattern looks like:
- Week 1: discovery, scope confirmation, design direction, environment setup.
- Week 2: core build — auth, roles, primary workflows, admin tools, security baseline.
- Week 3: content load, testing, UAT, deployment, handover.
For more involved builds (two-sided portals, AI integration, payment processing) it's typically 4-6 weeks. For genuinely bespoke platforms with multi-tenant requirements or regulated-sector compliance overlays, more — but those are scoped separately and we'll tell you straight if you're in that territory.
What pushes the price up
Five factors, in roughly order of impact:
- Number of distinct user roles. A two-role portal (client + admin) is much cheaper than a four-role portal (client + account manager + supervisor + super-admin) because every role needs its own UI, permissions and tests.
- Payment integration. Stripe or GoCardless is usually +£800-£1,500. If you need recurring billing, prorated charges, dunning logic, that's more.
- Document handling complexity. Simple uploads are cheap. Document templates with auto-fill, e-signature integration, versioning and approval workflows add real cost.
- Integrations with existing systems. CRM, accounting software, booking systems — each integration is typically £500-£2,000 depending on the API quality.
- Compliance overlay. Cyber Essentials baseline is included; specific compliance (ISO 27001, NHS DSP Toolkit, FCA) requires more work.
What keeps the price down
- Single-tenant architecture. Unless you're building a SaaS to sell, you don't need multi-tenancy. Skip it.
- Stripe-hosted checkout over custom payment forms. Same UX for the customer, fraction of the build cost.
- Reusing your existing domain and brand. A portal that lives at portal.yourdomain.tld doesn't need a separate brand identity.
- Phasing the build. Ship the core in week 2-3, add nice-to-haves on subsequent phases. We almost always recommend this over big-bang.
Our standard pricing benchmark
The Bloomorbit Client & Member Portal package starts at £3,500 for a standard build. That covers:
- Authentication (email + password with magic link fallback)
- Two roles (client + admin)
- Document upload/download with audit trail
- Admin dashboard
- Cyber Essentials-aligned security baseline
- Branded UI matching your existing site
- Three months of post-launch support
Bespoke AI-augmented portals — admissions CRMs, intelligent triage, lead-qualification systems — sit at the bespoke pricing tier. We scope those individually and tell you the number before any commitment.
How sector context affects scope
For accountants the dominant requirement is document exchange + audit trail. For solicitors it's case-file security and matter-level access controls. For healthcare practices it's intake forms and consent management with strict role separation. For B2B, it's typically a two-sided ordering workflow.
We've built all of these and the scopes settle quickly because the patterns repeat.
Common mistakes when budgeting
- Treating the demo as the spec. The demo is one workflow; the build needs all of them.
- Underestimating data migration. You almost certainly need to import existing user records, and that's a project of its own.
- Forgetting about training. Plan a half-day for staff training during week 3. Skipping this is how portals don't get adopted.
A note from the Bloomorbit studio
We build client portals for UK small businesses from Cardiff. If you'd like a straight answer on what your specific portal would cost and how long it'd take, the easiest path is a 10-minute call where we hear what you actually need and tell you the number. No discovery fees, no proposal theatre.