European Parliament | Institution | European Union

The European Parliament (EP) is the directly elected supranational legislative assembly of the European Union, representing the citizens of all EU member states. It shares legislative and budgetary authority with the Council of the European Union and exercises democratic oversight of the European Commission. It is the only directly elected supranational parliamentary body in the world.

Overview

The European Parliament occupies a structurally distinct position among the world’s democratic legislatures. Unlike a typical national parliament, it does not hold the exclusive right to initiate legislation — that power rests primarily with the European Commission — but it co-decides the vast majority of EU law through what is known as the ordinary legislative procedure. Its Members (MEPs) are chosen by voters across all EU member states every five years and organise not into national delegations but into transnational political groups based on ideological affiliation.

The Parliament’s official seat for full plenary sessions is Strasbourg, France, while most committee work and additional plenary meetings take place in Brussels, Belgium. The institution’s General Secretariat is headquartered in Luxembourg. This multi-site arrangement — a product of intergovernmental negotiation rather than functional preference — has remained a persistent point of institutional debate since the Parliament’s earliest years.

The Parliament’s authority has grown steadily through successive EU treaty revisions. From its origins as a purely consultative assembly, it has evolved into a co-equal legislative partner with the Council in most areas of EU policy, a transformation that reflects broader efforts to strengthen the democratic foundations of European integration.

Why the European Parliament Matters in Politics

The European Parliament matters for several interconnected reasons, each touching on fundamental questions about democracy and governance at the supranational level.

Democratic representation at scale. The EP provides direct electoral accountability in a political system that governs over 400 million people across multiple sovereign states. It translates the preferences of EU citizens into legislative outcomes at a level above the nation-state, an arrangement without precedent in the history of democratic governance.

Co-legislative power over the single market and beyond. Because the EU’s regulatory reach extends across trade, environmental standards, consumer protection, financial regulation, justice, and home affairs, the Parliament’s co-decision role gives it influence over areas of daily life that national parliaments increasingly cannot address unilaterally.

Oversight of executive power. The Parliament’s authority to approve or reject the European Commission as a whole — and to remove it through a motion of censure — provides a form of executive accountability that is central to the EU’s internal checks and balances. This reflects a core principle of separation of powers applied to a novel supranational context.

Forum for EU-wide political debate. The Parliament serves as the primary arena in which pan-European political disputes are aired and contested. Crises that begin at the level of individual member states — whether involving migration pressures, economic shocks, or rule-of-law concerns — frequently escalate into EU-level political contests within the Parliament’s chamber.

Historical Development

The Parliament traces its origins to the Common Assembly of the European Coal and Steel Community, established in the early 1950s. In this earliest form, it was composed of delegates appointed by national parliaments rather than directly elected by voters, and its powers were largely consultative.

The decisive turning point came in 1979, when the first direct elections by universal suffrage were held across the then-member states. This transformation significantly enhanced the institution’s claim to democratic legitimacy, even as its formal legislative powers remained limited at that stage.

Subsequent treaty revisions progressively expanded the Parliament’s authority:

• The Single European Act (1986) introduced a cooperation procedure that gave the Parliament a greater role in single-market legislation.
• The Maastricht Treaty (1992) introduced the co-decision procedure, giving the Parliament a genuine veto in specified policy areas.
• The Amsterdam (1997) and Nice (2001) treaties extended co-decision to additional policy fields.
• The Treaty of Lisbon (2009) represented the most significant expansion, renaming co-decision the “ordinary legislative procedure” and making it the standard mechanism for EU lawmaking across most policy domains. It also strengthened the Parliament’s role in the EU budget process and in scrutinising the Commission.

Structure and Composition

Members and Electoral System

MEPs are elected every five years. The allocation of seats among member states follows the principle of degressive proportionality: smaller states receive proportionally more seats relative to their population than larger states, though larger states hold more seats in absolute terms. This arrangement is a political accommodation to the reality that the EU comprises states of vastly different sizes, seeking to ensure that citizens of smaller member states retain meaningful representation.

The total number of seats in the Parliament is capped by EU treaty provisions and has varied across parliamentary terms, including as a result of EU enlargement and, most recently, the departure of the United Kingdom.

Political Groups

MEPs do not sit in national blocs. Instead, they form transnational political groups based on ideological alignment. To receive formal recognition — along with the associated resources, speaking time, and committee representation — a group must meet minimum thresholds of membership drawn from a specified number of different member states. This requirement is designed to ensure that groups reflect genuinely cross-national political orientations rather than purely national interests.

The composition of political groups shifts across parliamentary terms as new parties enter the Parliament, existing parties change affiliation, or new formations emerge. Historically, the major groupings have included formations occupying centre-right, centre-left, liberal-centrist, green, hard-left, and various Eurosceptic or nationalist positions. The Progressive Alliance of Socialists and Democrats (S&D) is among the most durable of the centre-left formations, representing affiliated social democratic and labour parties from across the EU.

No single political group has held an outright majority in recent parliamentary terms. This structural reality makes coalition-building across groups essential for passing legislation, electing the Parliament’s President, and confirming the Commission.

Leadership and Committees

The Parliament is headed by a President, elected by MEPs, who presides over plenary sessions and represents the institution externally. A Bureau and Conference of Presidents manage internal administration and the legislative agenda, respectively.

Much of the Parliament’s substantive work takes place in standing committees, which scrutinise draft legislation, prepare plenary positions, hold hearings with officials, and conduct investigations. The Parliament may also establish temporary committees or committees of inquiry to examine specific issues.

Powers and Functions

Legislative Role

Under the ordinary legislative procedure, the Parliament and the Council jointly adopt EU legislation. Either institution may propose amendments; disagreements may be resolved through successive readings and, if necessary, a formal conciliation process. This makes the Parliament a co-equal partner in EU lawmaking across most policy areas, including the single market, environmental regulation, consumer protection, and justice and home affairs.

In a smaller number of sensitive areas — including certain aspects of taxation, foreign policy, and constitutional treaty change — the Parliament holds only consultative or consent powers rather than full co-decision authority.

Budgetary Authority

The Parliament jointly adopts the EU’s multi-year financial framework (the long-term spending ceiling) and annual budgets with the Council. It also exercises discharge authority, formally approving or rejecting the Commission’s management of the budget in a given year. Refusal to grant discharge is a significant political sanction.

Oversight of the Commission

The Parliament’s oversight powers over the European Commission include:

• Confirmation hearings: Incoming Commissioners appear individually before relevant parliamentary committees; the Parliament votes on the Commission as a whole.
• Motion of censure: A two-thirds majority vote can force the entire Commission to resign.
• Question time and written questions: MEPs regularly interrogate Commissioners on their conduct and policies.
• Committees of inquiry: The Parliament may investigate alleged maladministration or breaches of EU law.

Consent to International Agreements

The Parliament must give its consent to most significant international agreements concluded by the EU, including major trade agreements, association agreements, and accession treaties. This gives the institution meaningful influence over EU external relations, even though formal negotiating authority rests with the Commission and Council.

Forum for Political Crisis

Beyond its formal institutional functions, the Parliament serves as a live political arena. Extraordinary plenary sessions can be convened to address urgent political matters — including, for example, migration crises affecting EU external borders — making the chamber a focal point for EU-level debate when member-state situations escalate in political significance.

Relationship with Other EU Institutions

Key Facts

Criticisms and Limitations

The democratic deficit. Critics argue that the Parliament, despite its direct election, does not fully resolve the EU’s so-called “democratic deficit.” The Commission’s exclusive right of legislative initiative means that citizens and their elected MEPs cannot directly compel new laws to be drafted, a constraint absent in most national parliamentary systems. Successive treaty reforms have partially addressed this by expanding co-decision, but the asymmetry persists.

Voter engagement. Turnout in European Parliament elections has historically been lower than in most national elections across member states, raising questions about the depth of popular engagement with the institution. Turnout patterns have varied across election cycles and member states.

The multi-seat arrangement. The division of the Parliament’s work between Strasbourg and Brussels is widely regarded as inefficient and costly. It is maintained by treaty obligation and member state agreement, meaning it cannot be altered by the Parliament itself.

Coalition dependency. Because no single group commands a majority, the Parliament depends on shifting coalitions. Critics argue this can produce opaque negotiations and reduce policy coherence; supporters argue it encourages deliberation and compromise.

Frequently Asked Questions

What is the primary role of the European Parliament? The European Parliament’s primary role is to represent EU citizens in the legislative process. It co-decides the majority of EU laws with the Council of the European Union, approves and scrutinises the EU budget, and holds the European Commission democratically accountable.

Can the European Parliament propose new laws? No. The right to formally initiate EU legislation rests primarily with the European Commission. However, the Parliament may request that the Commission bring forward a legislative proposal, and it plays a decisive role in shaping, amending, and ultimately approving or rejecting legislation once proposed.

Why does the European Parliament meet in two places? The Parliament’s official seat for plenary sessions is Strasbourg, France, as established by treaty and intergovernmental agreement. Additional plenaries and most committee work take place in Brussels. This arrangement reflects historical and political compromises among member states and cannot be changed by the Parliament alone.

How are MEPs organised politically? MEPs sit in transnational political groups based on ideological affiliation rather than national origin. These groups span the ideological spectrum from hard-left to far-right, with centre-right and centre-left formations historically among the largest. Groups must include members from a minimum number of different member states to receive formal recognition.

What happens if the European Parliament rejects the European Commission? Through a motion of censure requiring a two-thirds majority, the Parliament can force the entire College of Commissioners to resign. This is an extreme sanction; in practice, political pressure and individual commissioner hearings have historically been the more common tools of accountability.

How does the European Parliament differ from a national parliament? The Parliament shares several features with national legislatures — direct election, committee systems, political groups — but differs in key respects: it cannot independently initiate legislation, it co-governs with an intergovernmental body (the Council) rather than being the sole legislature, and it operates across twenty-plus languages and national political cultures simultaneously.

About The Author

Sophie Gesture

Political writer and analyst focused on global affairs, public policy, and emerging political trends.

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