# Article 258 TFEU Explained: The Infringement Procedure
URL: https://eu-now.com/blog/article-258-tfeu-infringement-procedure-explained
Published: 2026-07-10 · Updated: 2026-09-06
Category: Guides
Tags: TFEU, Article 258, infringement, Commission, EU Knowledge, EPSO
How the Commission pursues Member States that break EU law — the reasoned opinion, the referral to the Court, and the 258/259/260 distinctions EPSO tests.
## Key takeaways
- Article 258 TFEU lets the Commission act against a Member State it considers in breach of Treaty obligations — the legal backbone of its 'guardian of the Treaties' role
- Two mandatory steps before court: the State gets the opportunity to submit observations, then the Commission delivers a reasoned opinion with a compliance deadline
- Only if the State fails to comply within that period may the Commission bring the matter before the Court of Justice
- Exam triangle: 258 (Commission v Member State) vs 259 (Member State v Member State) vs 260 (financial penalties after a judgment is ignored)
When the Commission is called "guardian of the Treaties", Article 258 TFEU is the power behind the title. It is the procedure through which the Commission pursues a Member State that, in its view, has failed to fulfil an obligation under EU law — from an untransposed directive to a national rule that contradicts the Treaties. For the [EPSO EU Knowledge test](/test/eu_knowledge), it is prime material: a fixed sequence of steps, a discretionary "may", and two sibling articles to confuse it with.

The series also covers [Article 107 (State aid)](/blog/article-107-tfeu-state-aid-explained), [Article 191 (environment)](/blog/article-191-tfeu-environment-policy-explained), [Article 207 (common commercial policy)](/blog/article-207-tfeu-common-commercial-policy-explained), [Articles 15 and 16 TEU (European Council and qualified majority)](/blog/articles-15-16-teu-european-council-qualified-majority-explained) and [Article 47 of the Charter (effective remedy)](/blog/article-47-charter-effective-remedy-explained).

This is part of our TFEU series — see also [Article 45 (free movement of workers)](/blog/article-45-tfeu-free-movement-workers-explained), [Article 267 (preliminary rulings)](/blog/article-267-tfeu-preliminary-rulings-explained), [Article 288 (legal acts)](/blog/article-288-tfeu-legal-acts-explained) and [Article 294 (ordinary legislative procedure)](/blog/article-294-tfeu-ordinary-legislative-procedure-explained).

## The procedure, exactly as the treaty sequences it

The consolidated text (OJ C 202) packs the whole mechanism into two sentences, and every clause is testable.

**Step 1 — the accusation and the right to be heard.** If the Commission **considers** that a Member State has failed to fulfil an obligation under the Treaties, it delivers a **reasoned opinion** on the matter — but only "after giving the State concerned the opportunity to submit its observations". The State is heard before it is formally accused. In day-to-day practice this exchange opens with a *letter of formal notice*, the administrative first contact that frames the dispute.

**Step 2 — the reasoned opinion.** The Commission's formal statement of the breach, with a period for compliance. This is the pivot of the procedure: it fixes the scope of the case (the Commission cannot later expand it before the Court) and starts the clock.

**Step 3 — the referral.** If the State "does not comply with the opinion within the period laid down by the Commission, the latter **may** bring the matter before the Court of Justice of the European Union". Note *may*: referral is discretionary. Most infringement files never reach Luxembourg — they settle in the administrative phase, which is the procedure working as designed.

## The 258 / 259 / 260 triangle

EPSO rarely tests Article 258 alone; it tests whether you can keep three neighbouring procedures apart.

| Article | Who acts | Against whom | What it delivers |
|---------|----------|--------------|------------------|
| **258** | Commission | a Member State | Declaration of breach by the Court |
| **259** | a Member State | another Member State | Same — but the applicant State must first go through the Commission |
| **260** | Commission | a Member State that ignored a judgment | **Financial penalties** — lump sum and/or penalty payment |

The two classic swaps: attributing **fines** to Article 258 (wrong — penalties arrive under Article 260, after a first judgment is not complied with), and forgetting that under **Article 259** a Member State suing another must first bring the matter before the Commission, which gives its opinion before the case can proceed.

![The three actions before the Court of Justice side by side: Article 258 infringement, Article 263 annulment and Article 267 preliminary ruling, each with who brings it and against what.](/photos/blog/tfeu-judicial-triangle.en.svg)

## The two articles it is confused with

Article 258 is the Commission's route. Two neighbours do adjacent jobs, and swapping them is the most common way to lose a mark here.

**Article 259 — the same action, different applicant.** A Member State may bring another Member State before the Court for failing to fulfil a Treaty obligation, but it must first bring the matter to the Commission, which issues a reasoned opinion after hearing both sides. If the Commission does not deliver that opinion within three months, the case may go to the Court anyway. A statement that has one Member State suing another *directly*, with no prior step, describes something the Treaty does not provide.

**Article 260 — what happens after the judgment.** Article 258 ends with a declaration that the State has failed to fulfil an obligation. It is Article 260 that supplies the consequence: if the State does not comply with that judgment, the Commission may bring the case back and the Court may impose a lump sum or penalty payment. Fines are therefore **never** an Article 258 outcome — a distractor that attaches a financial penalty to the first judgment is wrong on the article, not on the policy.

## The distractor patterns to expect

**"Must" for "may".** Any statement obliging the Commission to open proceedings or to refer to the Court contradicts the discretionary language of the article.

**Skipped steps.** "The Commission may bring a Member State directly before the Court of Justice" — false: the observations stage and the reasoned opinion come first, in that order.

**Wrong actor.** "The European Parliament may bring infringement proceedings against a Member State" — no: under 258 that power belongs to the Commission (and under 259, to another Member State). Individuals cannot bring infringement actions either; their route into EU law enforcement runs through national courts and [Article 267](/blog/article-267-tfeu-preliminary-rulings-explained).

Together, 258 and 267 answer the exam's favourite meta-question — *who enforces EU law?* — from both ends: the Commission polices states top-down; national judges, in dialogue with the CJEU, protect rights bottom-up.

Drill the pattern against real questions in the [EU Knowledge practice hub](/test/eu_knowledge), and place it inside your full campaign with the [EPSO Preparation 2026 complete guide](/blog/epso-preparation-guide-2026).
## FAQ
### What are the steps of the Article 258 infringement procedure?
In the treaty text, three: (1) the Commission considers that a Member State has failed to fulfil a Treaty obligation and gives the State the opportunity to submit its observations; (2) the Commission delivers a reasoned opinion on the matter; (3) if the State does not comply with that opinion within the period the Commission lays down, the Commission may bring the matter before the Court of Justice. In administrative practice a letter of formal notice opens the exchange, but the reasoned opinion is the pivotal treaty-mandated step.
### Is the Commission obliged to take a Member State to court?
No — the treaty says the Commission 'may' bring the matter before the Court. The Commission enjoys discretion at every stage: whether to open a procedure, how long to negotiate, whether to refer. A statement turning that 'may' into 'must' is a standard EU Knowledge distractor.
### What is the difference between Articles 258, 259 and 260 TFEU?
Article 258: the Commission proceeds against a Member State for breach of EU law. Article 259: one Member State proceeds against another (rare in practice, and it must first bring the matter before the Commission). Article 260: what happens after a judgment — if a State fails to comply with the Court's ruling, the Commission can return to the Court and request financial penalties (lump sum or penalty payment). Questions love swapping which article carries the fines.
## Official sources
- EUR-Lex — Consolidated version of the TFEU (OJ C 202, 7.6.2016): https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex%3A12016E%2FTXT
- EU Careers — EPSO testing (official): https://eu-careers.europa.eu/en/selection-procedure/epso-tests

## This article in other languages
- French: https://eu-now.com/fr/blog/article-258-tfeu-infringement-procedure-explained/llms.txt
- German: https://eu-now.com/de/blog/article-258-tfeu-infringement-procedure-explained/llms.txt
- Spanish: https://eu-now.com/es/blog/article-258-tfeu-infringement-procedure-explained/llms.txt
- Italian: https://eu-now.com/it/blog/article-258-tfeu-infringement-procedure-explained/llms.txt

Source of record: https://eu-now.com/blog/article-258-tfeu-infringement-procedure-explained — published by EU-now (eu-now.com), which is not EPSO and not affiliated with the European Commission.