How long should websites retain analytics data?

There is no single retention period that makes all website analytics compliant. The appropriate period depends on the purpose, the information collected and any specific rules that apply.

Under the UK GDPR’s storage-limitation principle, identifiable information should not be retained longer than necessary for its purpose. The ICO’s storage limitation guidance explains why organisations must justify their retention decisions.

A practical approach is to:

1. Define what the analysis needs to measure.

2. Determine how long individual records are necessary.

3. Configure deletion or effective anonymization.

4. Apply the decision to exports, backups and connected systems.

5. Review whether the original need still exists.

A provider’s default setting is a technical option, not a legal justification.

Genuinely anonymous statistics may support longer-term comparisons without retaining identifiable event histories. However, calling a report “aggregate” does not automatically establish anonymity; privacy-preserving analytics depends on the safeguards applied throughout the process.