The verdict in three sentences
A poorly scoped legal case management system costs 30 to 50 % more than planned — not because of the code, but because of the back-and-forth from a vague requirements spec. A spec costed module by module — matter management, time recording, activity-based billing, hearing calendar, digital vault — lets you get comparable quotes and hold a budget. This 2026 template gives you the scope, workflows and EUR ranges for a Berlin firm of 5 to 15 lawyers.
Structure of a spec that holds up
A good spec answers four questions per module: who uses it, what data goes in, what action comes out, what business rule applies. For a law firm, the core is matter management tied to time recording and billing. Around it orbit modules of varying value: the electronic court filing (beA in Germany), the client vault, the synced hearing calendar, and GDPR / professional-secrecy compliance.
| Module | Priority | Complexity | Budget EUR |
|---|---|---|---|
| Matter + parties management | Critical | Medium | 8,000 - 12,000 |
| Time recording | Critical | Low | 3,500 - 5,000 |
| Activity-based billing | Critical | High | 7,000 - 11,000 |
| Hearing calendar + deadlines | High | Medium | 4,000 - 6,500 |
| Digital client vault | High | Medium | 5,000 - 8,000 |
| Client portal + messaging | Medium | Medium | 4,500 - 7,000 |
| Matter profitability reporting | Medium | Low | 3,000 - 4,500 |
| Full-scope total | — | — | 35,000 - 54,000 |
Business workflow to spell out in black and white
The central workflow links matter opening to cash collection. Every step must appear in the spec with its rules: opening triggers a conflict check, time entry feeds a counter of billable activities at the lawyer's hourly rate, billing applies the fee agreement (fixed fee, hourly, contingency), and closure archives to the vault with the statutory retention period.
| Workflow step | Business rule to specify | Required integration |
|---|---|---|
| Matter opening | Mandatory conflict check | Internal client base |
| Lawyer assignment | Hourly rate by grade | HR parameters |
| Time entry | 6-min rounding, activity type | None |
| Billing | Fee agreement + 19 % VAT | Accounting software |
| Collection | Bank reconciliation | Bank / escrow |
| Closure | Archiving + retention period | Vault |
The most sensitive integrations are the escrow / client-funds and the accounting software: they must be listed with the exchange format (API, file, manual entry) because they weigh heavily on the quote.
Mini case study
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Herr Diop, partner in a 9-lawyer firm in Berlin-Mitte. He hesitates between a legal vendor at EUR 65/user/mo (EUR 7,020/yr for 9 seats) and a targeted custom build. His spec states he only wants to rebuild activity-based billing and profitability reporting (the 2 areas where the vendor constrains him), for EUR 16,000, and keep the vendor for court filing and calendar.
Maths: he moves to a reduced vendor licence at EUR 35/user/mo (EUR 3,780/yr) and saves EUR 3,240/yr in licences. Above all, automated billing recovers 1.5 days/month of secretarial work (18 days/yr at EUR 220 = ~EUR 4,000/yr). Total gain ~EUR 7,200/yr, custom build repaid in 27 months. Over 5 years: +EUR 20,000.
FAQ
What budget should I plan for custom law-firm software in 2026? A full scope costs EUR 35,000 to 54,000; a targeted 2-3 module approach comes to EUR 12,000 to 20,000. The spec is what lets you choose.
Do I have to rebuild everything? No. The rule: keep the vendor for court filing and regulated compliance, build custom for billing and steering. That cuts the budget by 50 to 60 %.
How long to write a good spec? Budget 2 to 4 weeks with business workshops. A well-costed 20-30 page spec saves several thousand euros in controlled quotes.
What are the development timelines? A targeted scope (2-3 modules) ships in 8 to 12 weeks; a full scope in 16 to 22 weeks, escrow and accounting integrations included.
Do GDPR and professional secrecy change the budget? Yes, budget EUR 3,000 to 6,000 for encryption, retention-period management and access traceability. It is non-negotiable for a law firm.
Let's scope your project. Send us your lawyer count, your current vendor and the modules that hold you back: we turn that into a costed spec and a comparable quote. 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.
