Equality and Non-Discrimination in EU Law

The principle of equality and non-discrimination is a foundational value of the European Union legal order, now binding as primary law through Article 2 TEU (the Union’s founding values), Article 3(3) TEU (the Union’s objectives), Articles 8 and 19 TFEU (Treaty bases for action), and Articles 20–26 of the Charter of Fundamental Rights (equality rights). The principle has been developed through extensive secondary legislation — most notably the Framework Equality Directive (2000/78/EC) and the Race Equality Directive (2000/43/EC) — and through the transformative case law of the Court of Justice, which has recognised equality as a general principle of EU law capable of horizontal direct effect.

Treaty Basis and Legislative Framework

Article 19 TFEU (formerly Article 13 EC, introduced by the Treaty of Amsterdam) empowers the Council, acting unanimously in accordance with a special legislative procedure and after obtaining the consent of the European Parliament, to take appropriate action to combat discrimination based on sex, racial or ethnic origin, religion or belief, disability, age, or sexual orientation. The scope of Article 19 is limited: it provides a legal basis for EU action but does not itself create directly effective rights. The implementing directives give concrete expression to the principle of equality and provide the operative legal framework for anti-discrimination law.

Two directives form the core of EU anti-discrimination law. The Race Equality Directive (Directive 2000/43/EC) prohibits discrimination on grounds of racial or ethnic origin in employment, education, social protection, healthcare, and access to goods and services. The Framework Equality Directive (Directive 2000/78/EC) prohibits discrimination on grounds of religion or belief, disability, age, or sexual orientation in employment and occupation. The directives require Member States to prohibit direct discrimination, indirect discrimination, harassment, instructions to discriminate, and victimisation. They also require Member States to establish equality bodies to promote equal treatment, provide independent assistance to victims, and conduct surveys and studies.

The General Principle of Equality

The Court of Justice has recognised equality as a general principle of EU law, binding on the EU institutions and on the Member States when they act within the scope of EU law. The general principle requires that comparable situations must not be treated differently and that different situations must not be treated in the same way unless such treatment is objectively justified. The principle operates as a constitutional constraint on EU action and as a standard of review for national measures implementing EU law.

In Mangold v Helm (Case C-144/04), the Court gave the general principle of equality a transformative application. The case concerned German legislation that allowed fixed-term employment contracts for workers over the age of 52 without requiring objective justification, implementing the Framework Directive’s provisions on age discrimination. The Court held that the principle of non-discrimination on grounds of age is a general principle of EU law, giving expression to which the Directive merely provides a specific framework. Because the general principle is an autonomous source of EU law, distinct from the Directive, it may have horizontal direct effect in disputes between private parties, even where the Directive itself could not have horizontal effect.

The Mangold judgment was controversial. Critics argued that the Court circumvented the prohibition on horizontal direct effect of directives established in Marshall. The Court reaffirmed the approach in Kücükdeveci v Swedex GmbH & Co KG (Case C-555/07), where it held that national legislation that permitted dismissal without notice for employees with less than two years of service, regardless of age, could be reviewed for compliance with the general principle of non-discrimination on grounds of age. The Mangold-Kücükdeveci doctrine has been confirmed in subsequent cases, establishing that national courts must disapply national provisions that conflict with the general principle of equal treatment, even in proceedings between private parties.

Direct and Indirect Discrimination

EU anti-discrimination law distinguishes between direct discrimination — where one person is treated less favourably than another in a comparable situation on a prohibited ground — and indirect discrimination — where an apparently neutral provision, criterion, or practice would put persons having a particular protected characteristic at a particular disadvantage compared with other persons. Direct discrimination can be justified only by a genuine and determining occupational requirement, strictly defined. Indirect discrimination may be justified by a legitimate aim where the means of achieving that aim are appropriate and necessary.

Burden of Proof

The shifted burden of proof is a central feature of EU anti-discrimination law. Once a complainant establishes facts from which it may be presumed that direct or indirect discrimination has occurred — typically by producing statistical evidence or circumstantial evidence — the respondent must prove that there has been no breach of the equal treatment principle. The respondent may demonstrate that the difference in treatment is justified by a legitimate aim or that there is no causal link between the protected characteristic and the differential treatment.

Remedies and Enforcement

Member States must ensure that judicial and/or administrative procedures are available to enforce anti-discrimination rights. Remedies must be effective, proportionate, and dissuasive, and must provide adequate compensation for loss and damage sustained. Trade unions, non-governmental organisations, and equality bodies may engage in proceedings on behalf of complainants. Member States must establish independent equality bodies with the power to provide independent assistance to victims, conduct surveys and studies, and publish reports and recommendations.

Horizontal Application

The horizontal application of EU equality law — its enforceability in disputes between private parties — remains one of the most dynamic and contested areas of EU constitutional law. While the Framework Directive itself cannot impose obligations on private individuals (following Marshall), the general principle of equality, as recognised in Mangold and Kücükdeveci, can. The Court confirmed in Egenberger v Evangelisches Werk für Diakonie und Entwicklung e.V. (Case C-414/16) that the principle of non-discrimination on grounds of religion, as a general principle giving effect to Article 21 of the Charter, can be invoked in a dispute between private parties. The horizontal direct effect of general principles of equality represents a significant expansion of EU fundamental rights protection, though its precise scope continues to be clarified through the case law.