The 7 EU Institutions: What Each One Does (and Why It Matters for Your Exam)

Knowing who does what is one of the most valuable things you can learn for your EU career

The EPSO EU Knowledge test accounts for 25% of your final AD5 score. And within that test, questions about the EU institutions — their roles, powers, composition, and interactions — are among the most frequently asked.

The good news: the institutional framework follows a clear logic. Once you understand the design, the details fall into place naturally. Here is your complete guide to all seven.

The 7 institutions at a glance

These seven are formally established by Article 13 of the Treaty on European Union (TEU). They are not the only EU bodies — there are also agencies, advisory committees, and other organs — but these seven are the institutions in treaty terms.

The legislative triangle: how EU laws are made

Three institutions work together to create EU legislation. Understanding their interaction is essential for both the exam and your future career.

The European Commission: proposes

The Commission has the exclusive right of legislative initiative — it is the only institution that can formally propose new EU laws. It also:

• Manages the EU budget and allocates funding
• Ensures member states apply EU law correctly (the "Guardian of the Treaties")
• Represents the EU in international negotiations
• Employs the largest share of EU civil servants (~32,000 staff)

Exam tip: The Commission proposes, it does not adopt legislation. This distinction appears in questions regularly.

The Commission has 27 Commissioners — one per member state — each responsible for a policy portfolio. They are nominated by national governments but serve the EU interest, not their country's.

The European Parliament: co-decides

The Parliament is the only directly elected EU institution. Its 720 members (MEPs) are elected every five years by EU citizens. The Parliament:

• Co-legislates with the Council on most policy areas (the "ordinary legislative procedure")
• Approves or rejects the EU budget
• Approves or rejects the Commission President and the college of Commissioners
• Exercises democratic oversight over all EU institutions

Exam tip: The Parliament cannot initiate legislation — it can only amend, approve, or reject what the Commission proposes. It can, however, request the Commission to submit a proposal.

Plenary sessions take place in Strasbourg (12 times per year), while committee work and additional sessions happen in Brussels.

The Council of the EU: co-decides

Often called the "Council of Ministers," this is where national governments have their say. The Council:

• Co-legislates with the Parliament
• Coordinates economic and fiscal policies across member states
• Concludes international agreements on behalf of the EU
• Develops the Common Foreign and Security Policy (CFSP)

The Council has no fixed members. Instead, national ministers attend depending on the topic: finance ministers for economic affairs, agriculture ministers for farming policy, and so on. This is why it meets in 10 different configurations.

The presidency of the Council rotates among member states every six months.

Exam tip: The Council votes by qualified majority (55% of member states representing 65% of the EU population) on most matters, but unanimity is still required for taxation, foreign policy, and treaty changes.

The European Council: setting the direction

This is the most commonly confused institution — and one of the most tested exam traps.

The European Council is not a legislative body. It brings together the heads of state or government of all 27 member states, along with its own President and the Commission President. Its role is to:

• Define the EU's overall political priorities and direction
• Resolve issues that cannot be settled at ministerial level
• Nominate the Commission President and the High Representative for Foreign Affairs

It meets at least four times per year (known as "European Council summits") and makes decisions by consensus.

The critical distinction: The European Council sets political direction. The Council of the EU legislates. They share the same building in Brussels (the Europa building) but have completely different compositions, powers, and roles.

The Court of Justice of the European Union

Based in Luxembourg, the CJEU ensures that EU law is interpreted and applied uniformly across all member states. It has two courts:

• The Court of Justice — handles cases brought by member states, institutions, and preliminary rulings from national courts
• The General Court — handles cases brought by individuals, companies, and some organisations

The CJEU can:

• Annul EU legislation that violates the treaties
• Rule that a member state has failed to fulfil its EU obligations
• Provide binding interpretations of EU law when national courts ask

Exam tip: One judge per member state in the Court of Justice (27 judges). The General Court has two judges per member state (54 judges).

The European Central Bank

The ECB manages monetary policy for the eurozone (the 21 member states that use the euro, since Bulgaria joined on 1 January 2026). Its primary mandate is price stability — targeting inflation close to 2% over the medium term. The ECB:

• Sets interest rates for the eurozone
• Manages foreign reserves
• Supervises major banks (through the Single Supervisory Mechanism)
• Issues euro banknotes

Based in Frankfurt, the ECB is independent from political influence — no EU institution or national government can give it instructions.

Exam tip: The ECB governs the eurozone, not the entire EU. Non-euro countries (like Poland, Hungary, or the Czech Republic) have their own monetary policies.

The European Court of Auditors

Based in Luxembourg, the ECA is the EU's independent external auditor. It:

• Checks that EU funds are collected and spent correctly
• Audits any person or organisation handling EU funds
• Publishes an annual report and special reports on specific policy areas
• Provides opinions on financial legislation

The ECA has one member per member state, appointed for six-year terms. It has no legal power to enforce its findings but its reports carry significant weight and often lead to policy changes.

How the institutions interact: the flow you need to know

Commission PROPOSES → Parliament & Council AMEND & ADOPT → Commission IMPLEMENTS
                                                          → Court of Justice REVIEWS
                                                          → Court of Auditors AUDITS
European Council SETS DIRECTION (political, non-legislative)
ECB MANAGES MONETARY POLICY (independent, eurozone only)

This flow is the backbone of dozens of EPSO questions. If you understand who proposes, who decides, who reviews, and who audits — you have the framework for answering most institutional questions correctly.

You already have a strong foundation

The EU institutional framework is elegant once you see its design: propose, decide, implement, review, audit — with political direction from the top and democratic legitimacy from elected MEPs. Mastering these seven institutions gives you a reliable base for the EU Knowledge test and for your entire career ahead.

Build on this foundation with structured practice. Join the EU-Now waitlist for targeted EU Knowledge questions verified against official sources, institution-focused drills, and adaptive learning that focuses on your weak areas so every study session counts.