Infringement Proceedings under Articles 258–260 TFEU

Infringement proceedings under Articles 258–260 TFEU are the primary enforcement mechanism by which the European Commission ensures that Member States comply with their obligations under EU law. The procedure enables the Commission, as guardian of the Treaties, to bring a Member State before the Court of Justice of the European Union for failure to fulfil a Treaty obligation. The system combines administrative dialogue, judicial enforcement, and financial penalties to secure compliance with EU law across all twenty-seven Member States.

The Commission’s Role and Discretion

The European Commission acts as the guardian of the Treaties under Article 17 TEU, responsible for ensuring the application of EU law. The Commission has broad discretion to decide whether to initiate infringement proceedings. It may act on its own initiative, in response to complaints from individuals, businesses, or NGOs, or following questions from the European Parliament. The Commission publishes annual reports on the application of EU law, monitoring compliance across all policy areas.

The Commission’s discretion is not absolute. While the CJEU has held that the Commission is not obliged to commence proceedings (Case 247/87, Star Fruit), it must act in accordance with the principles of good administration and equal treatment. The Commission has published detailed guidelines in its communications on EU law enforcement, setting out priorities for infringement action. These priorities include cases involving the incorrect transposition of directives, persistent non-compliance with CJEU judgments, breaches causing serious harm to citizens or businesses, and violations of exclusive EU competences.

The Administrative Stage: Letter of Formal Notice and Reasoned Opinion

The pre-litigation phase comprises two stages designed to resolve the dispute without recourse to the Court. First, the Commission sends a letter of formal notice to the Member State, specifying the alleged breach and inviting the Member State to submit observations within a prescribed period, typically one to two months. The letter defines the subject matter of the proceedings, and the Commission cannot later expand the scope of the case beyond the matters raised in the letter.

If the Member State’s response is unsatisfactory or if no response is received, the Commission issues a reasoned opinion. This document sets out the Commission’s legal analysis of the alleged infringement, specifying the Treaty provisions or secondary legislation that the Member State has violated. The reasoned opinion includes a deadline by which the Member State must comply, usually one to two months. Failure to comply within the deadline authorises the Commission to bring the matter before the CJEU.

The administrative stage serves important functions. It gives the Member State notice of the alleged breach and an opportunity to respond, respecting the principle of audi alteram partem. It enables the Commission and the Member State to resolve the matter without litigation, with approximately 75 per cent of cases being resolved at this stage. It also defines the scope of any subsequent judicial proceedings, ensuring procedural fairness and legal certainty.

The Judicial Stage: Article 258 TFEU

If the Member State fails to comply with the reasoned opinion, the Commission may bring an action before the CJEU under Article 258 TFEU. The Commission bears the burden of proving the alleged infringement. The Court examines whether the Member State has failed to fulfil an obligation under EU law, considering the state of the law at the expiry of the deadline set in the reasoned opinion. The judgment is declaratory: the Court declares that the Member State has failed to fulfil its obligations and requires the Member State to take the necessary measures to comply.

The Member State may raise defences to the infringement action. The most common defences include force majeure, the practical impossibility of compliance, and respect for fundamental rights. However, the CJEU has consistently held that a Member State cannot plead provisions, practices, or circumstances in its internal legal system to justify a failure to comply with EU law (Case 128/78, Commission v United Kingdom). A Member State cannot rely on the illegal conduct of another Member State as a defence (Case 232/78, Commission v France), nor on the failure of the Council to adopt harmonising measures. The only defence that has succeeded in practice is force majeure, and even then only in exceptional circumstances.

Special procedures apply under Article 259 TFEU, enabling one Member State to bring infringement proceedings against another. The complaining Member State must first bring the matter to the Commission, which must issue a reasoned opinion after giving both states an opportunity to submit observations. The Commission route is practically mandatory, and Article 259 actions are extremely rare, partly because Member States prefer to rely on the Commission to enforce compliance and partly because of the political costs of suing another Member State.

Financial Penalties under Article 260 TFEU

Article 260 TFEU provides for financial penalties against Member States that fail to comply with a CJEU judgment. The procedure operates in two stages. Under Article 260(2), if the Commission considers that the Member State has not taken the necessary measures to comply with the Court’s judgment, it may issue a further reasoned opinion and bring a second action before the Court. The Commission proposes a lump sum and/or a periodic penalty payment, and the Court determines the amount that is appropriate and proportionate.

The Commission calculates proposed penalties using a standard methodology based on three criteria: the seriousness of the infringement, its duration, and the need to deter future non-compliance. The basic amount is multiplied by a specific coefficient for each Member State, reflecting its ability to pay based on GDP and voting weight in the Council. Periodic penalty payments accrue daily from the date of the second judgment until compliance is achieved. Lump sums are one-off payments penalising the very fact of non-compliance with the first judgment.

The CJEU has considerable discretion in setting penalties. In Commission v France (Case C-304/02), concerning French restrictions on fisheries, the Court imposed a penalty of EUR 57.76 million, the largest ever at the time. In Commission v Poland (Case C-441/17), concerning logging in the Białowieża Forest, the Court imposed a periodic penalty of at least EUR 100,000 per day. Article 260(3), introduced by the Treaty of Lisbon, allows the Commission to propose financial penalties already at the first infringement action when a Member State has failed to notify measures transposing a directive.

The Broader Enforcement Framework

Infringement proceedings operate alongside other enforcement mechanisms. Individuals may invoke EU law directly before national courts through the doctrine of direct effect, creating a parallel enforcement channel. The principle of state liability established in Francovich (Cases C-6/90 and C-9/90) enables individuals to claim damages from Member States that breach EU law. The Commission may also use alternative tools including EU Pilot dialogues, structured problem-solving mechanisms, and cooperation with national ombudsmen.

The effectiveness of infringement proceedings depends on the political and legal willingness of Member States to comply. Compliance rates are high: over 80 per cent of cases are resolved before the second CJEU judgment, and most Member States take compliance seriously. The combination of judicial declaratory judgments, financial penalties, and the political cost of being found in breach of EU law makes infringement proceedings a powerful enforcement tool. The procedure has been instrumental in ensuring the uniform application of EU law across the internal market, in environmental protection, in consumer law, and in countless other fields.