The verdict in three sentences
In 2026, custom case management software for a New York law firm costs between 45,000 and 120,000 EUR, delivered in 4 to 8 months. A legal SaaS (Clio, MyCase, PracticePanther) costs 40 to 90 EUR/user/month but imposes its data model and security level. Custom pays off as soon as client confidentiality, time-based billing and conflict-of-interest detection become critical to profitability and compliance.
The budget module by module in 2026
Here is a 2026 order of magnitude for a business firm of 6 to 15 lawyers in New York.
| Module | Scope | 2026 cost (EUR) | Timeline |
|---|---|---|---|
| Matter management | Practice areas, parties, deadlines | 10,000 - 20,000 | 5-7 wk |
| Time entry | Timers, hourly rates per partner | 8,000 - 16,000 | 4-6 wk |
| Fee billing | Time-based, fixed fee, retainers | 10,000 - 20,000 | 5-7 wk |
| Conflict detection | Party database, alerts | 6,000 - 14,000 | 3-5 wk |
| Document vault | Encryption, granular rights | 8,000 - 18,000 | 4-6 wk |
| Client portal + e-signature | Matter tracking, deeds | 7,000 - 16,000 | 4-6 wk |
| Project total | Full base | 49,000 - 104,000 | 4-8 months |
Annual maintenance represents 15 to 20 % of development, i.e. 7,000 to 21,000 EUR/year, sovereign hosting and backups included.
Security, billing and collections: what custom changes
The real value is measured not by the licence price, but by fees recovered and risk avoided.
| Issue | Standard legal SaaS | Custom software |
|---|---|---|
| Monthly cost (10 users) | 400 - 900 EUR/month | 0 (hosting 80-200 EUR) |
| Data hosting | Shared, sometimes offshore | Sovereign, dedicated |
| Time-based billing | Standardized | Firm's own rules |
| Unbilled fees | 8-15 % typical | Cut via automatic timers |
| Conflict detection | Basic or absent | Custom, blocking |
| 4-year cost (10 users) | 19,000 - 43,000 EUR | 57,000 - 114,000 EUR |
Mini case study
Mr. Laurent, managing partner of a 9-lawyer business firm in New York, finds that 12 % of time worked is never billed for lack of rigorous entry. The firm bills on average 220 EUR/h and produces 14,000 billable hours/year.
12 % of lost time = 1,680 hours, i.e. 369,600 EUR of uncaptured fees. Custom software at 82,000 EUR, with automatic timers, brings the loss down to 4 %. The recovered gain approaches 265,000 EUR/year. The return on investment is reached in under 5 months, maintenance included.
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FAQ
What budget should I plan for my law firm?
In 2026, expect 45,000 to 120,000 EUR depending on modules. A matters + time + billing base starts around 45,000 EUR.
How long to go live?
Between 4 and 8 months for a firm of 6 to 15 lawyers, training and data migration included.
Will my client data be hosted sovereignly?
Yes, sovereign, dedicated hosting can be integrated, with encryption at rest and granular access rights — an edge over shared SaaS.
Is conflict-of-interest detection reliable?
It relies on your party database and can be blocking at matter opening, with automatic alerts before any engagement.
How much is recovered on billing?
Firms often lose 8 to 15 % of fees for lack of entry. Automatic timers bring that loss down to a few points.
Let's scope your project. Tell us your lawyer count, priority modules, indicative budget and timeline, and we will price your custom firm software. 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.
