The verdict in three sentences
A custom client portal for a law firm costs 18,000 to 40,000 EUR excl. tax in 2026, depending on functional depth (case tracking, document sharing, encrypted messaging, signing). Its ROI isn't cosmetic: it cuts follow-up calls by around 50 % and professionalizes the client relationship. The critical point remains GDPR compliance and professional secrecy: strong authentication, encryption and traceability are non-negotiable.
What the budget covers by tier
A client portal comes in three tiers. Price depends mostly on encrypted messaging and e-signature.
| Tier | Features | 2026 budget |
|---|---|---|
| Essential | Case tracking + documents | 18,000-24,000 EUR |
| Advanced | + encrypted messaging + notifications | 25,000-32,000 EUR |
| Premium | + e-signature + online billing | 33,000-40,000 EUR |
The Essential tier is enough for most firms that mainly want to unclog the phone. Premium targets firms digitalizing the whole journey, from engagement to invoice.
The technical items that weigh
Security is a significant share of the budget. Here's the indicative split of a 28,000 EUR Advanced portal.
| Item | 2026 budget | Share |
|---|---|---|
| Strong authentication (MFA) | 3,000-5,000 EUR | ~15 % |
| Encrypted messaging | 5,000-8,000 EUR | ~25 % |
| Versioned document sharing | 4,000-6,000 EUR | ~20 % |
| Real-time case tracking | 4,000-6,000 EUR | ~20 % |
| Integration with the management tool | 5,000-8,000 EUR | ~25 % |
Integration with the management tool is decisive: without it, the portal becomes a silo the firm fills by hand, which cancels the time saved.
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Mini case study
Ms. Garnier, partner at a 6-lawyer firm in Lyon, receives around 40 follow-up calls per week, each taking on average 12 minutes of secretarial time, i.e. 8 h/week. An Advanced portal at 28,000 EUR excl. tax cuts these calls by 50 %: 4 h/week recovered, or about 190 h/yr. At the secretary's loaded cost of 28 EUR/h, the saving is 5,320 EUR/yr, on top of the image uplift (reassured clients, fewer chase-ups). The investment pays back in about 3 years on time savings alone, faster once recovered fees are counted.
FAQ
Does a client portal replace the management tool? No, it connects to it. The portal is the client-facing storefront; the management tool stays the internal engine. Integration between the two costs 5,000 to 8,000 EUR but drives the entire ROI.
How is professional secrecy guaranteed in a portal? Through two-factor strong authentication, document and message encryption, and strict partitioning: each client sees only their case. It's audited before going live.
Is the portal GDPR compliant? Yes, provided EU hosting, a clear retention policy and consent collection. Include compliance in scope from the framing stage, not after.
How long to deliver a portal? An Essential tier ships in 6 to 10 weeks, a Premium in 12 to 16 weeks depending on e-signature and online billing.
Can it be rolled out gradually to clients? Yes. We recommend a pilot on 10 to 20 cases for a month before general rollout, to fine-tune notifications and permissions.
Let's scope your project. Tell us the target tier (tracking only or full journey with e-signature), your headcount and your current management tool: we'll frame the scope and an indicative budget. 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.
