Legal and professional services app cost
A client portal with documents and e-signature runs $80,000 to $140,000. A practice platform with matter management, time capture, trust-aware billing and search runs $220,000 to $450,000.
Cross-platform mobile, 30 screens, 3 user roles, with the compliance posture this vertical carries.
- Timeline
- 5.5 – 7.6 months
- Engineering hours
- 2,775 – 3,525
- Data sensitivity
- 4 of 5
- Default security posture
- Hardened
Compliance and security add $42,067 here
That is 10% of this build, measured rather than asserted: we priced the identical app with no named regime and a baseline security posture, and this is the difference. None of it produces a user-visible feature, and none of it can be retrofitted cheaply.
Regimes that apply in this vertical
- SOC 2 Type IINobody by law. In practice it is the entry ticket for selling software to any US mid-market or enterprise buyer, and it is asked for during procurement rather than after.
- $20K – $48K audit
- GDPRAnyone offering services to people in the EU or UK, wherever your company is. A US-only product with US-only users is generally outside it.
- $0 – $12K audit
- CCPA / CPRABusinesses over the revenue or data thresholds with California consumers. In practice, most US consumer products at any scale.
- $0 – $8K audit
- ADA / Section 508 accessibilityPublic sector procurement contractually, and in practice any consumer or education product large enough to attract a complaint.
- $6K – $20K audit
Systems you will likely integrate with
- Custom / in-house APIA system you own, but did not build for this product.
- moderate
- StripePayments, subscriptions, payouts and hosted checkout.
- moderate
- SendGrid / PostmarkTransactional email, templates, deliverability and DMARC setup.
- simple
- Other CRMA CRM that is not Salesforce or HubSpot.
- moderate
What makes legal & professional services different
Confidentiality obligations are strict
Privilege and conflict-of-interest rules mean access control has to be enforced per matter, not per user. That is a genuinely finer-grained permission model than most products need.
Documents are the product
Versioning, redlining, templates, e-signature and defensible retention are the core, and full-text search across them needs a real search index.
Time and billing is unforgiving
Rate tables, trust accounting rules and invoice formats leave no room for approximation, and clients audit them.
Who uses software in this vertical
Each additional role brings its own screens plus a row in a permission matrix that grows faster than the role count — because every new role is a question about every role that already exists.
End customer
The public-facing app
Staff / operator
Day-to-day operational screens
Manager / supervisor
Approvals, oversight, reporting
Administrator
Configuration, users, permissions
Compliance officer
Access reviews, audit logs, incident response
Four standards of finish
The same app in legal & professional services, built to four different levels of depth.
| Level | Cost range | Timeline | Hours | Team |
|---|---|---|---|---|
| MVP Prove it works | $260K – $360K | 4.6 – 6.5 months | 2,200 | 7 |
| Standard Production ready | $370K – $500K | 5.5 – 7.6 months | 3,100 | 7 |
| Advanced Built to grow | $470K – $650K | 6.2 – 8.5 months | 3,950 | 7 |
| Enterprise Audited and integrated | $600K – $850K | 7.2 – 9.7 months | 5,100 | 7 |
per month, cloud and vendors, at 45,000 monthly users
19% – 26% of build cost
Drives peak concurrency, and therefore the architecture.