Data Protection Impact Assessments: when you need one

A Data Protection Impact Assessment (DPIA) is a structured way of asking, before you build something, "what could go wrong for the people whose data this touches, and how do we reduce that risk?" It is a design discipline as much as a compliance document.

Significant Data Fiduciaries carry more explicit assessment obligations under the Act, but the underlying discipline — mapping data flows, identifying high-risk processing, and documenting mitigations — is good practice for any organisation handling personal data at scale, not just those formally designated.

In our DCDPO curriculum, we treat a DPIA as a living document tied to a specific processing activity, not a one-time compliance exercise. New features that touch existing personal data, or introduce new categories of data (location, biometric, financial), are the moments to revisit it.

The output that matters most isn’t the document itself — it’s the decisions it forces: do we actually need this field, this retention period, this third-party integration? A DPIA done well should make your product simpler, not just better documented.