Version 1.0 – Adopted on 8 October 2024

These guidelines analyse the criteria set down in Article 6(1)(f) GDPR that controllers must meet to lawfully engage in the processing of personal data that is “necessary for the purposes of the legitimate interests pursued by the controller or by a third party”.

Article 6(1)(f) GDPR is one of the six legal bases for the lawful processing of personal data envisaged by the GDPR. Article 6(1)(f) GDPR should neither be treated as a “last resort” for rare or unexpected situations where other legal bases are deemed not to apply nor should it be automatically chosen or its use unduly extended on the basis of a perception that Article 6(1)(f) GDPR is less constraining than other legal bases.

For processing to be based on Article 6(1)(f) GDPR, three cumulative conditions must be fulfilled: • First, the pursuit of a legitimate interest by the controller or by a third party; • Second, the need to process personal data for the purposes of the legitimate interest(s) pursued; and • Third, the interests or fundamental freedoms and rights of the concerned data subjects do not take precedence over the legitimate interest(s) of the controller or of a third party.

In order to determine whether a given processing of personal data may be based on Article 6(1)(f) GDPR, controllers should carefully assess and document whether these three cumulative conditions are met. This assessment should be done before carrying out the relevant processing operations.

With regard to the condition relating to the pursuit of a legitimate interest, not all interests of the controller or a third party may be deemed legitimate; only those interests that are lawful, precisely articulated and present may be validly invoked to rely on Article 6(1)(f) GDPR as a legal basis. It is also the responsibility of the controller to inform the data subject of the legitimate interests pursued where that processing is based on Article 6(1)(f) GDPR.

With regard to the condition that the processing of personal data be necessary for the purposes of the legitimate interests pursued, it should be ascertained whether the legitimate interests pursued cannot reasonably be achieved just as effectively by other means less restrictive of the fundamental rights and freedoms of data subjects, also taking into account the principles enshrined in Article 5(1) GDPR. If such other means exist, the processing may not be based on Article 6(1)(f) GDPR.

With regard to the condition that the interests or fundamental rights and freedoms of the person concerned by the data processing do not take precedence over the legitimate interests of the controller or of a third party, that condition entails a balancing of the opposing rights and interests at issue which depends in principle on the specific circumstances of the relevant processing. The processing may take place only if the outcome of this balancing exercise is that the legitimate interests being pursued are not overridden by the data subjects’ interests, rights and freedoms.

A proper Article 6(1)(f) GDPR assessment is not a straightforward exercise. Rather, the assessment — and in particular the balancing of opposing interests and rights — requires full consideration of a number of factors, such as the nature and source of the relevant legitimate interest(s), the impact of the processing on the data subject and their reasonable expectations about the processing, and the existence of additional safeguards which could limit undue impact on the data subject. The present guidelines provide guidance on how such an assessment should be carried out in practice, including in a number of specific contexts (e.g., fraud prevention, direct marketing, information security, etc.) where this legal basis may be considered.

The guidelines also explain the relationship that exists between Article 6(1)(f) GDPR and a number of data subject rights under the GDPR.

Go to the full Guidelines.