Biometric time tracking: five compliance questions before deployment

A legal requirement to record working time does not automatically justify biometric identification.

That distinction is essential when an organization considers fingerprint or facial-recognition terminals.

1. What is the actual purpose?

If the purpose is simply to record start and end times, document that clearly. Do not expand the system into access control, productivity scoring or employee profiling without a separate analysis.

2. Is biometric data really necessary?

Ask whether a badge, PIN, managed app or other less intrusive method can meet the same objective.

Convenience is not the same as necessity.

3. What legal condition covers special-category data?

Biometric data used for unique identification falls under GDPR Article 9. A normal lawful basis under Article 6 is not enough by itself.

4. Have you completed the risk work before buying?

High-risk biometric attendance systems should be assessed before deployment, including necessity, proportionality, storage design and threat scenarios.

5. What does the vendor actually store?

Request clear answers about templates, central databases, encryption, deletion, subprocessors, support access and data location.

Security architecture matters

Prefer designs that minimize central storage and prevent reuse of templates for unrelated purposes. Define deletion when employment ends and restrict access to the smallest possible group.

Biometrics can be technically elegant while still being legally unjustified.

Full Spanish analysis: Biometric time tracking and GDPR.