The verdict in three sentences
A law firm wanting a custom case-management tool invests between EUR 40,000 and 110,000 in 2026, depending on the number of modules and users. The core of time-based billing + calendar + secure document vault must be designed to respect data protection and attorney-client privilege, which shapes the security architecture. Development runs 12 to 20 weeks and evolutive maintenance is 15% of the initial cost per year.
What the budget covers by scope
Price varies mainly with the number of modules and the required security level. Here is the 2026 order of magnitude for a firm of 8 to 15 lawyers.
| Scope | Modules included | Price | Timeline |
|---|---|---|---|
| Essential | cases + calendar + time billing | EUR 40,000-55,000 | 12-14 wks |
| Intermediate | + vault + client portal + reminders | EUR 60,000-80,000 | 15-18 wks |
| Advanced | + conflict checks + reporting + API | EUR 85,000-110,000 | 18-20 wks |
| Hardened security | encryption, compliant hosting, audit | +EUR 8,000-15,000 | +2-3 wks |
| Annual maintenance | fixes, evolutions, support | 15%/year | ongoing |
The document vault and conflict-of-interest management are the most sensitive items: they bear directly on privilege and the managing partner's liability.
The administrative hours the software eliminates
A custom tool's value is measured in recovered billable time. Here are the estimated gains per lawyer per month.
| Task | Before | After | Gain/month |
|---|---|---|---|
| Time entry | manual, late | built-in timer | 3-4 h |
| Invoice drafting | spreadsheet | automatic | 2-3 h |
| Fee reminders | manual emails | auto scenarios | 2 h |
| Document search | paper files | indexed vault | 2-3 h |
| Deadline tracking | separate calendar | central alerts | 1-2 h |
In total, a lawyer recovers 10 to 12 administrative hours per month, redeployable as billable time.
Mini case study
Mr. Bennett is managing partner of a 10-lawyer firm in Midtown Manhattan. He orders an intermediate tool at EUR 72,000, delivered in 17 weeks. Each lawyer recovers 11 hours a month, of which 6 are actually re-billed at an average rate of EUR 220. That is 10 × 6 × 220 = EUR 13,200 of additional monthly revenue. Even counting only half of that gain, the project pays back in about 11 months, maintenance included.
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FAQ
What budget should I plan for custom law firm software in 2026?
Between EUR 40,000 and 110,000 depending on scope. A core of cases + calendar + billing starts at EUR 40,000, while a full tool with vault, portal and conflict checks exceeds EUR 85,000.
How does the software protect attorney-client privilege?
Through encryption at rest and in transit, granular access rights and compliant hosting. Budget an extra EUR 8,000-15,000 for a hardened security level with audit.
How long does development take?
Between 12 and 20 weeks depending on the number of modules. The scoping and UX design phase is about 3 weeks, essential for a tool lawyers will use daily.
What does 15% annual maintenance include?
Fixes, minor evolutions, security updates and support. On a EUR 72,000 project that is roughly EUR 10,800 a year, to budget from the start.
Does the software connect to my accounting?
Yes, via API or a standardised accounting export. The billing connector to your accounting tool typically costs EUR 4,000-9,000 depending on the format your accountant expects.
Let's scope your project. Tell us the number of lawyers, the priority modules (time billing, vault, conflict checks) and a target budget: we scope the perimeter and security level. 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.
