Lawyers · GDPR

Lawyers — GDPR: balancing compliance with professional secrecy

Law firms process case-related data that is inherently confidential and sensitive. The GDPR intersects with professional secrecy, adding formal obligations around security, retention periods and sub-processing. This guide details this intersection and provides a tailored roadmap.

DPO / CISO team — Data Comply One Updated on 15 June 2026

In brief

  • Regulation: GDPR.
  • All firms, regardless of size, are concerned as data controllers.
  • Maintain a register.
  • Secure robustly.
  • Balancing transparency and secrecy.
  • GDPR fines of up to €20M or 4%, cumulative with disciplinary risk in the event of a breach of confidentiality.

Regulatory deadlines

The key dates of this regulation.

May 2018

Entry into application

In force

What does GDPR cover?

Both the GDPR and professional secrecy protect confidentiality. The GDPR adds further requirements: a register, information notices (in compliance with secrecy obligations), enhanced security, retention periods adapted to conservation obligations, and oversight of processors.

The sensitivity of case file data raises the level of security requirements.

Is the 'Lawyers' sector concerned?

All firms, regardless of size, are concerned as data controllers. Service providers (hosting, business software) are processors.

The appointment of a DPO depends on the size and nature of the organisation's activities, but formalised governance is recommended.

Detailed obligations

Maintain a register

Document the firm's processing activities and their purposes.

Strengthen security

Encryption, access control, security of exchanges and file hosting.

Balance information and confidentiality

Inform individuals while respecting professional secrecy.

Control retention periods

Align retention periods with storage obligations, then archive or delete.

Govern service providers

Sign DPAs with hosting providers and business software vendors.

Sanctions & risks

GDPR fines of up to €20M or 4%, cumulative with disciplinary risk in the event of a confidentiality breach. A leak of case file data is a major incident.

Common mistakes in the sector

  • 1Insufficient security. Under-protecting data in sensitive case files.
  • 2Unmanaged service providers. Hosting without DPA or safeguards.
  • 3Undefined retention periods. Retaining records without any limit.
  • 4Missing register. Failing to document processing activities.

Practical case

A firm was exchanging case documents via unsecured messaging and hosting its data without a DPA. Achieving compliance involves encrypted communications, a governed hosting provider, a data retention policy, and a register.

Compliance roadmap

  1. 1

    Map. Mapping processing activities.

  2. 2

    Secure. Strengthen security and hosting.

  3. 3

    Articulate. Balance information and secrecy.

  4. 4

    Frame retention periods. Aligning with obligations.

  5. 5

    Contractualise. Supervise service providers.

Frequently asked questions

No: GDPR adds formal obligations beyond confidentiality.

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