The European Union works as a partnership of 27 countries that have signed treaties handing shared institutions the power to make binding rules in specific areas, chiefly trade, the single market, competition, and a growing list of policies from data protection to climate. Four institutions do the day-to-day work: national leaders in the European Council set direction, the European Commission proposes laws and enforces them, and the European Parliament and the Council of the European Union pass or reject those proposals together. Everything the EU does has to fit inside the powers the treaties grant; where the treaties are silent, national governments still decide.
What the EU Is Allowed to Do
The treaties function as the EU’s constitution. They list the areas where member states have agreed to act together and set the limits of that shared authority. The governing principle is subsidiarity: the EU can act only where member states alone cannot achieve the objective as effectively, and only to the extent necessary.1European Parliament. The Principle of Subsidiarity That is why the EU regulates cross-border matters like product standards, competition, and the currency shared by 20 of its members, but does not, for example, run national schools or hospitals.
Countries keep their own governments, parliaments, courts, armies, tax systems, and constitutions. Membership means agreeing that in the specific fields covered by the treaties, EU rules take precedence over conflicting national rules, and that disputes about those rules are settled by a common court.
The Four Institutions That Share Power
No single body runs the EU. Power is split among four institutions that each represent a different constituency, and the friction between them is deliberate.
The European Council
The European Council is where the heads of state or government of every member country meet, together with the European Council President and the President of the European Commission. It gathers at least four times a year to set the EU’s broad political direction and priorities, and it does not pass laws itself.2European Union Council. Council Meetings Explained When a politically sensitive file is stuck elsewhere, national leaders use these summits to broker a compromise, then leave the drafting to the other institutions.
The European Commission
The Commission is the EU’s executive arm and holds the exclusive right to propose new legislation, known as the right of initiative.3European Commission. Planning and Proposing Law It has 27 Commissioners, one per member country, but each is expected to serve the EU’s interests rather than represent their home government.4EUR-Lex. Right of Initiative The Commission also manages the EU budget, negotiates international trade agreements, and enforces EU rules. When a country fails to implement a directive or breaches its treaty obligations, the Commission is the body that opens the case.
The European Parliament
The Parliament is the only EU institution whose members are directly elected by citizens. For the 2024–2029 term it has 720 members, allocated among member countries roughly by population, with a floor of six seats and a ceiling of 96 per country.5European Parliament. 2024-2029 European Parliament: How Many MEPs Per Country? Members sit in political groups organized by ideology rather than nationality, so a Spanish center-right politician sits alongside center-right colleagues from across Europe.
The Parliament shares lawmaking power with the Council of the European Union on most policy areas, votes on the EU budget, and must approve the Commission President. It can also force the entire Commission to resign through a motion of censure.
The Council of the European Union
The Council of the European Union, sometimes called the Council of Ministers, is different from the European Council. It is made up of national government ministers who meet in configurations matching the topic on the table: agriculture ministers for farm policy, finance ministers for economic rules, and so on. Together with the Parliament, it shares lawmaking and budgetary authority.
Most Council decisions require a qualified majority: at least 55 percent of member countries representing at least 65 percent of the EU’s total population must vote yes, and a blocking minority needs at least four countries. That dual threshold stops either a handful of large states or a coalition of small ones from dictating outcomes on its own. On especially sensitive files, such as foreign policy or taxation, the Council has to vote unanimously.
Two smaller institutions provide oversight. The European Court of Auditors checks that EU money is collected and spent properly and reports annually to the Parliament on the Commission’s handling of the budget.6European Union. European Court of Auditors (ECA) The European Ombudsman investigates complaints of maladministration by EU bodies from any EU citizen, resident, or business, once the person has first tried to resolve the issue with the institution involved.7European Union. How We Work
How a Law Gets Made
Most EU laws follow the Ordinary Legislative Procedure. The Commission drafts a proposal and sends it to both the Parliament and the Council. In the first reading, the Parliament adopts its position and passes it to the Council. If the Council accepts the Parliament’s text as-is, the law is adopted.8European Parliament. Ordinary Legislative Procedure – Overview More often, the Council proposes changes and sends the file back for a second reading.
In the second reading, each institution has three months, extendable by one month, to adopt its position. The Parliament can accept the Council’s version, reject it outright and kill the proposal, or table further amendments. If the Council will not accept those amendments, a conciliation committee drawn from both sides tries to negotiate a joint text. If it succeeds, both bodies vote on the compromise in a third reading. If conciliation fails, the proposal dies.8European Parliament. Ordinary Legislative Procedure – Overview
What EU Laws Look Like
Once a law is adopted, its form matters. A regulation applies directly and uniformly in every member country the moment it enters into force. A directive sets a result each country must achieve, but leaves each national government to write the actual domestic legislation. A decision is binding only on whoever it is addressed to, whether a country, a company, or an individual. If your rights come from a regulation, you can point to its exact wording in any EU court. If they come from a directive, you need to check how your own country implemented it.
Citizens Pushing From Outside
Citizens can also put items on the Commission’s desk. A European Citizens’ Initiative signed by at least one million EU citizens from a minimum of seven member countries obliges the Commission to consider the proposal and respond formally.9European Union. How It Works – European Citizens’ Initiative The Commission does not have to draft legislation, but it must publicly explain its reasoning either way.
How EU Law Is Enforced
The Court of Justice of the European Union is the judicial branch. Article 19 of the Treaty on European Union gives it the mandate to uphold the law in the interpretation and application of the treaties.10The Faculty of Law. Treaty on European Union (TEU) It is made up of one judge per member state, assisted by eleven Advocates-General who deliver independent legal opinions before the Court rules.
Its most influential mechanism is the preliminary ruling. When a national court anywhere in the EU is unsure how to interpret an EU rule, it can, and sometimes must, refer the question to the Court of Justice. The Court’s answer is binding, which keeps the same rule from meaning one thing in France and something else in Poland.10The Faculty of Law. Treaty on European Union (TEU) Decades of these rulings have built the case law that shapes areas from consumer protection to competition.
The Court also hears infringement cases against member states. The Commission first sends a formal letter asking for information, then a reasoned opinion demanding compliance. If the country still fails to act, the Commission takes it to the Court. Where the Court finds a violation and the country still does not comply, it can impose daily or lump-sum penalties running into millions of euros.
What the EU Actually Does
The most tangible product of all this machinery is the single market, built on four freedoms guaranteed by the treaties: free movement of goods, services, capital, and people. A product legally sold in one member country can be sold in the others without extra customs checks or tariffs. A worker from Portugal can take a job in the Netherlands without a work permit. An Irish firm can sell financial services to German clients. A French investor can buy property in Italy with no cross-border capital restriction. These are enforceable legal rights, and the Court of Justice has struck down national laws that get in their way. Alongside the freedoms, the EU harmonizes technical standards, product safety rules, and professional qualifications, so businesses and workers do not run into 27 different regulatory regimes. The result is one economic space of roughly 450 million people.
The Euro and Economic Rules
Twenty of the 27 member states use the euro. Monetary policy for those countries is set by the European Central Bank in Frankfurt, whose primary mandate is price stability, defined as keeping inflation at 2 percent over the medium term.11European Central Bank. Price Stability Objective and the Strategy Review The ECB adjusts interest rates and manages the money supply, and it operates independently of national governments by design.
Eurozone countries also sign up to fiscal discipline. Annual budget deficits are meant to stay below 3 percent of GDP and total public debt below 60 percent of economic output.12European Commission. Stability and Growth Pact The EU reformed the enforcement framework in 2024 to give countries more flexibility in how they hit those targets, but the reference values themselves are unchanged. When a eurozone country hits a severe crisis, the European Stability Mechanism can lend emergency funds, conditional on economic reforms agreed with the Commission, the ECB, and often the IMF.13European Stability Mechanism. Financial Assistance Instruments
Rules for the Digital Economy
The EU has become one of the world’s most active regulators of digital technology, and three frameworks show what that means in practice. The General Data Protection Regulation applies to any organization processing personal data of people in the EU, wherever that organization is based; under Article 3 it reaches non-EU companies that offer goods or services to people in the EU, even for free, or that monitor their behavior.14GDPR-Info. Art. 3 GDPR – Territorial Scope The Digital Markets Act designates the largest online platforms as “gatekeepers” and imposes specific obligations, including bans on self-preferencing, interoperability requirements for messaging, and the right for users to uninstall pre-loaded apps. As of 2024, six companies have been designated: Alphabet, Amazon, Apple, ByteDance, Meta, and Microsoft. The EU Artificial Intelligence Act sorts AI systems into four risk tiers, from unacceptable (banned outright) to minimal (largely unregulated), with high-risk systems in areas like hiring, credit scoring, and law enforcement subject to detailed requirements taking effect in August 2026 and August 2027 depending on the category.15Shaping Europe’s Digital Future. AI Act
Joining, Leaving, and Losing Rights
Any European country can apply to join if it meets the Copenhagen Criteria, first set out in 1993: stable democratic institutions protecting human rights and the rule of law, a functioning market economy able to cope with competitive pressure in the single market, and the capacity to take on the full body of EU law. Accession negotiations work through 35 policy chapters covering the entire acquis communautaire, and each chapter must be individually closed before an accession treaty is signed. That treaty then needs ratification by every existing member state, so each one holds an effective veto.16European Commission Enlargement. Conditions for Membership Nine countries currently hold candidate status: Albania, Bosnia and Herzegovina, Georgia, Moldova, Montenegro, North Macedonia, Serbia, Turkey, and Ukraine.17European Parliament Epthinktank. EU Enlargement
When a member state is accused of undermining the EU’s founding values, Article 7 sets out the consequences. The Council can first find that a clear risk of a serious breach exists, which requires a four-fifths majority and Parliament’s consent. Confirming a serious and persistent breach then requires unanimity in the European Council.18legislation.gov.uk. Treaty on European Union – Article 7 Only after that unanimity finding can the Council vote by qualified majority to suspend certain treaty rights, including voting rights. The unanimity step at the middle of the process sets an extremely high practical bar.
Article 50 gives any member state the right to leave. The withdrawing country notifies the European Council, which starts a two-year window to negotiate a withdrawal agreement. Approval requires a qualified majority in the Council and consent from the Parliament.19legislation.gov.uk. Consolidated Version of the Treaty on European Union – Article 50 If no deal is reached in two years, the treaties simply stop applying, unless all remaining members unanimously agree to extend the deadline. The departing country’s representatives are excluded from EU decisions about its own exit. The United Kingdom’s 2020 departure remains the only time Article 50 has ever been used.