A Practical Guide for UK Organisations

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What is a DPIA?

A Data Protection Impact Assessment (DPIA) is a structured process used to identify and minimise the data protection risks of a project. It is a requirement under the UK GDPR and Data Protection Act 2018 when processing is likely to result in a high risk to individuals’ rights and freedoms. DPIAs help organisations demonstrate accountability and embed privacy considerations into project design.

Why is a DPIA needed?

A DPIA ensures that privacy and data protection are considered at the design stage of any project. It helps organisations demonstrate compliance, avoid costly breaches, and build trust with customers and regulators. It also provides a clear record of decisions and mitigations taken to protect personal data.

Which businesses need to complete one?

Any organisation that processes personal data in ways that could pose high risks must complete a DPIA. This includes:

• Large-scale data processing or profiling
• Use of innovative technologies, such as AI or biometrics
• Systematic monitoring of public areas
• Processing of sensitive data, including health, ethnicity, or criminal records

Public authorities and private businesses alike should assess whether their activities meet these criteria and document their reasoning.

How to complete a DPIA

A DPIA typically follows these steps:

1. Identify the need
   Determine if the project involves high-risk data processing and why a DPIA is appropriate.
2. Describe the processing
   Outline what data will be collected, from whom, how it will be used, where it will be stored, and who it will be shared with.
3. Assess necessity and proportionality
   Explain the purpose of the processing, the legal basis, and why the data and methods used are limited to what is necessary.
4. Identify risks
   Evaluate potential impacts on individuals’ privacy and rights, including risks of unauthorised access, misuse, or incorrect decisions.
5. Define mitigations
   Plan technical and organisational measures to reduce or eliminate risks, such as access controls, encryption, minimisation, and staff training.
6. Consult stakeholders
   Engage with your Data Protection Officer, if you have one, relevant internal stakeholders, and, where appropriate, affected individuals or regulators.
7. Document and review
   Record the DPIA, decisions taken, and mitigations implemented. Review and update the DPIA if the project changes or new risks emerge.

Summary

A DPIA is not just a compliance exercise—it is a proactive safeguard for responsible data handling. By integrating DPIAs into project planning, organisations can build trust, ensure transparency, and maintain compliance with UK data protection law, particularly when adopting new technologies such as AI.

For more information, please email customer.services@cplus.co.uk