The General Data Protection Regulation (GDPR) distinguishes special category data from regular personal data due to its highly sensitive nature.
This category includes information revealing:
- racial or ethnic origin,
- political opinions,
- religious or philosophical beliefs,
- trade union membership,
- genetic and biometric data,
- health data,
- data concerning a person’s sex life or sexual orientation.
Due to the sensitivity of this information, the GDPR imposes more greater restrictions on processing it. It aims to protect individuals’ privacy and reduce potential risks associated with mishandling.
Contents
- What’s so Special about Special Category Data?
- The Importance of Lawfully Processing Special Category Data
- Complying with the Law on Special Category Data
- The Lawful Bases for Processing Special Category Data
- The Importance of Compliance with GDPR for Special Category Data
What’s So Special About Special Category Data?
Special category data is considered highly sensitive because it can reveal details about an individual’s health, genetics, sexual orientation, religious beliefs, or other personal aspects. This type of data can be particularly vulnerable to misuse and discrimination.
For example, people can – and sadly do – experience discrimination because of their ethnicity or sexuality. Because the GDPR is European-wide legislation it also covers personal data that is sensitive in ways that is strange to people in the UK. Trade union membership is considered special category data because up to the 1990s being in a trade union could get people into trouble with communist or fascist regimes.
The GDPR recognises the heightened risk associated with special category data and therefore imposes stricter requirements for its processing.
The Risk of Harm
Here are the key reasons why special category data gets special protection:
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Increased Risk of Harm. The misuse of special category data can lead to severe harm, such as discrimination, social exclusion, or financial loss.
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Fundamental Rights. Processing special category data can infringe on fundamental rights. Examples include the right to privacy and the right to non-discrimination.
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Distress. Because of the sensitive nature of the data people can experience severe distress from the misuse of sharing of characteristics about them that they might wish to keep private.
To process special category data, organisations must typically have explicit consent from the data subject or rely on a specific legal basis, such as:
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Public interest: Processing is necessary for public health, social policy, or scientific research.
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Vital interests: Processing is necessary to protect the vital interests of the data subject or another person.
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Legal claims: Processing is necessary for legal claims.
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Public health: Processing is necessary for public health purposes.
By imposing stricter requirements on the processing of special category data, the GDPR aims to protect individuals from potential harm and ensure that their sensitive information is handled responsibly.
The Importance of Lawful Processing of Special Category Data
As noted above mishandling special category data can result in significant harm to individuals, including discrimination and loss of confidentiality. GDPR acknowledges the high stakes involved by setting out clear, but limited routes for processing this type of data.
Ensuring the lawful, safe and respectful handling of data is not only a regulatory obligation. It is also a cornerstone of maintaining trust and respect with individuals. Organisations that prioritise these principles demonstrate a commitment to upholding fundamental rights. This can enhance their reputation and build stronger client and employee relationships.

Lawful Bases for Processing Special Category Data
GDPR outlines lawful grounds for processing special category data, and organisations must adhere strictly to these routes. Processing is only allowed when at least one of these conditions is met. It must also be accompanied by additional safeguards given the sensitivity of the data. Here are some of the main legal bases for processing special category data.
Explicit Consent
Explicit consent is one of the most straightforward lawful bases for processing special category data. Such consent requires a clear, specific, and unambiguous agreement from the data subject. Valid consent means people must fully informed of the nature of the data and the purpose for its processing. This consent must be affirmative and recorded, ensuring that the individual clearly understands and willingly agrees to the use of their sensitive information.
However, relying solely on consent can be risky. Individuals have the right to withdraw their consent at any time, potentially disrupting data processing activities.
In addition when seeking consent relating to special category data you must seek it separately from consent for other purposes.
Processing for Employment, Social Security, or Social Protection
Organisations may process special category data without explicit consent if it is necessary for carrying out specific obligations or exercising rights in the fields of employment, social security, or social protection law. For example, employers may process health data to comply with workplace health and safety requirements, or to perform occupational health assessments. However, such processing must be based on legal or regulatory requirements and be limited to what is strictly necessary to achieve the purpose. This basis is frequently utilised in HR, where handling sensitive employee data is essential to providing adequate protections and support.
Protecting Vital Interests of the Data Subject
“Vital interests” means to protect a person from death or serious harm. When processing is necessary to protect the vital interests of the data subject or another person and the individual is physically or legally incapable of giving consent, GDPR allows such data handling without prior consent.
This lawful basis is particularly relevant in emergency scenarios where critical health information must be accessed to provide care. For instance, healthcare providers might need to process a patient’s medical history in life-threatening situations where obtaining consent is impractical or impossible.
Processing by Non-Profit Organisations
Non-profit organisations with political, philosophical, religious, or trade union objectives can process special category data as long as the data is related to members, former members, or individuals in regular contact with the organisation.
This lawful basis is there to give not-for-profit entities with the ability to handle sensitive information within the scope of their work, such as managing memberships or engaging with supporters. However, the data must not be disclosed outside the organisation without consent, ensuring that this lawful basis remains narrowly focused and protective of individuals’ rights.
Processing for Substantial Public Interest
The GDPR provides for processing special category data when it is deemed necessary for reasons of substantial public interest, based on Union or Member State law. This lawful basis covers a range of situations, such as safeguarding national security, preventing fraud, or ensuring public health. However, the substantial public interest must be clearly defined in law, and processing must be proportionate and accompanied by appropriate safeguards. This condition acknowledges that, in specific circumstances, the public benefit of data processing may outweigh individual privacy rights if handled responsibly.
Processing for Health or Social Care
Special category data can also be processed without explicit consent when it is necessary for the provision of health or social care, or the management of healthcare systems. This lawful basis is needed for health and social care settings where sensitive information, such as medical histories, diagnoses, and treatment plans, needs to be accessed to provide effective care. Data processing under this category must be handled by a health professional or someone equally bound by a duty of confidentiality, ensuring that patient privacy is preserved while facilitating essential health services.
Processing for Public Health Purposes
Public health processing provisions enable the handling of special category data in contexts like disease prevention, occupational medicine, and health crisis management.
This lawful basis ensures that organisations can take necessary actions to protect public health. Examples include monitoring disease outbreaks or enforcing quarantine measures. Processing under this category must be justified by public interest in health and be carried out by professionals under a duty of confidentiality to mitigate risks to individuals’ privacy.
Archiving, Research, and Statistical Purposes
GDPR allows the processing of special category data for archiving in the public interest, scientific or historical research, and statistical purposes. This lawful basis recognises that sensitive information is valuable for advancing knowledge and informing public policy.
Processing under this basis must be proportionate, and organisations are encouraged to employ data minimisation, anonymisation, or pseudonymisation techniques to protect individuals’ identities. For example, medical research studies often rely on sensitive data to generate insights that benefit society, underscoring the importance of balancing privacy with innovation.
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To lawfully process special category data the GDPR requires robust policies and documentation practices. Clear and comprehensive policies should outline how special category data is handled, the lawful bases relied upon, and the specific safeguards in place. Documentation is equally critical. Organisations must maintain records of processing activities (RoPA), data protection impact assessments (DPIAs), and the measures used to protect data. A well-documented framework demonstrates a commitment to compliance and ensures accountability in data handling. Data Protection Impact Assessments (DPIAs) are a tool for assessing processing activities that nay pose high risks to individuals’ rights and freedoms. They are particularly important when dealing with special category data. DPIAs help organisations identify potential privacy risks, assess their impact, and implement measures to mitigate them. Conducting DPIAs is essential for responsible data governance, as it allows organisations to proactively address risks and avoid breaches. DPIAs are invaluable tools for compliance and serve as evidence of due diligence in safeguarding sensitive information. Staff training is an indispensable element of GDPR compliance, especially when dealing with sensitive data. Employees who use special category data must be thoroughly trained on GDPR principles. Training should cover the lawful bases for processing, and data protection best practices. Training should cover confidentiality requirements, data minimisation strategies, and breach response protocols. People should also be trained to spot potential problems and escalate them quickly to avoid crises emerging. Information security is key for processing any kind of personal data. The GDPR requires data controllers and processors to consider the type of data they are using when implementing information security. It is natural higher security is needed for special category data. These include encryption, access control, regular audits, and incident response plans. Organisations should also consider using anonymisation or pseudonymisation techniques to further protect individuals’ privacy. Investing in robust security measures not only helps reduce the risk of a data breach. It also reinforces trust with data subjects by demonstrating a commitment to protecting their most sensitive information. Plus six months’ free post course support to help you apply your learning Rated 4.8 out of 5 on Trustpilot The GDPR’s stringent requirements for handling special category data emphasise the regulation’s commitment to protecting individual rights. Adhering to the lawful bases for processing sensitive information, implementing comprehensive policies, and adopting strong security measures are essential for any organisation handling special category data. Compliance not only safeguards individuals’ privacy but also strengthens an organisation’s reputation and builds trust among stakeholders.Complying with the Law on Special Category Data
Data Protection Impact Assessments (DPIAs)
Training Staff on Handling Sensitive Data
Information Security
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The Importance of Compliance with GDPR for Special Category Data
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