How Belgium divides power along two axes at once

What the constitution set up and what it became

The Constitution of Belgium was established on 7 February 1831, months after independence, and it is the primary source of law and the basis of the political system. It has been changed several times, and the most consequential reforms were made in 1970 and in 1993.

What it created in 1831 was a unitary constitutional monarchy with a French-speaking establishment governing a population that was mostly Dutch-speaking. What it has become through six state reforms is a federation in which most of the competences sit below the federal level, and the direction of travel has been the same at every step: power moving downward from the federal level.

The king of the Belgians is head of state and the prime minister is head of government, with executive power exercised by the government in a multi-party system. The monarchy survived the transformation because it is one of very few institutions that belongs to both language communities and is claimed by neither.

The reason the constitution keeps being rewritten is that no reform has yet produced a settlement both sides regard as final. Each round has transferred competences, created or adjusted an institution, and left the underlying question open.

Why regions and communities are different things

Belgium's federalism has two kinds of federated entity and they exist for different reasons.

Regions are territorial. Flanders, Wallonia and Brussels-Capital are defined by where they are, and they hold competences attached to a place: economic policy, employment, transport, public works, housing, environment and energy.

Communities are personal. The Flemish, French and German-speaking Communities are defined by language rather than by territory, and they hold competences attached to people: education, culture, language policy, welfare and health services.

The two systems would map onto each other neatly except for Brussels, which is officially bilingual, sits geographically inside Flanders, and is overwhelmingly French-speaking in practice. Because a Brussels resident may belong to either community while living in a single region, the two axes cannot be merged, and the country therefore maintains both.

Each of the five components, the Flemish Community, the French Community, the German-speaking Community, the Walloon Region and the Brussels-Capital Region, has its own directly elected unicameral council or parliament. They vote decrees, or ordinances in Brussels, that carry the same force of law as federal legislation in the fields they control.

How the federal parliament is composed

The Belgian Federal Parliament consists of the Chamber of Representatives and the Senate. The Chamber has 150 members and the Senate has 60, and all 150 representatives are elected directly.

The Senate is the chamber that changed most. It is now made up of 50 senators appointed by the parliaments of the communities and regions and 10 co-opted senators, which converts it from a directly elected second chamber into a body representing the federated entities. Before the reform of 2014 it was composed differently, and the change reflects the same movement of weight from the federal level to the components.

Elections are proportional and the electorate is divided by language. Voters in Flanders choose from Flemish parties, voters in Wallonia from francophone parties, and the parties themselves have been split along the same line since around 1970, when the significant national parties separated into distinct representations for each community's interests.

The consequence is that Belgium has no national parties and therefore no national election. There is no party a voter in Antwerp and a voter in Liège can both support, and the federal government is assembled after the vote by negotiation between two separate party systems that have just fought two separate campaigns.

Why forming a government takes so long

The arithmetic follows directly from the structure above. A federal coalition normally needs parties from both language communities, and the two sides want different things: Flemish parties generally favour much larger community and regional autonomy including financial and tax autonomy, while francophone parties generally oppose it and tend to favour more state control.

Those are not positions that split the difference easily, because one side is asking for a transfer of competence and the other is refusing it. Add proportional representation, three broad political families on each side of the language border, and the requirement for a two-thirds majority for constitutional change, and government formation becomes a negotiation between six or seven parties over a document that has to satisfy both halves of the country.

Belgium has consequently produced some of the longest government formations recorded in a democracy, periods measured in hundreds of days during which a caretaker administration runs the state. The country continues to function through them, which says something either about the quality of its permanent administration or about how much the federal level still does, and Belgians make both arguments.

The three political families are close to the centre by international standards: liberals, Christian democrats and social democrats, each existing in a Flemish and a francophone version, with greens and nationalist parties beside them.

What the monarchy is for

A hereditary head of state looks like an anachronism in a federation this decentralised, and it is the reason the federation still holds together as a single state.

Every other Belgian institution belongs to one language community or is contested between them. Parties, media, universities, broadcasters, trade unions and most cultural bodies exist in Dutch-speaking and French-speaking versions with little overlap. The monarchy is one of a very small number of things that is neither Flemish nor francophone, and its formal neutrality is the whole of its function.

The constitutional role is narrow and it becomes conspicuous at exactly the moments the country needs it. The king appoints an informateur and then a formateur to explore and then assemble a coalition, and during a formation lasting hundreds of days the palace is the only institution with a defined procedural role and no side in the argument.

Republican sentiment exists in both communities and has never converged into a movement, partly because abolishing the monarchy would require agreement between the two sides on what should replace it, which is precisely the kind of agreement that has proved hardest to reach.

Where Europe sits in the arrangement

Belgium was a founding member of the European Communities, signing on 25 March 1957, and of NATO on 4 April 1949, and Brussels became the seat of the main European institutions and of NATO headquarters. A country whose own federal capital is contested hosts the capital of the continent.

That has practical consequences beyond prestige. A substantial share of Brussels employment, property and international population exists because of the institutions, the city functions in English as much as in its two official languages for a large working population, and the region's economy is shaped by a sector that answers to no Belgian government.

European integration also changed what Belgian federalism means. Competences transferred downward to the regions and communities are exercised inside a European framework, so a Flemish or Walloon minister negotiating in a Council of Ministers formation is representing Belgium in an area where the federal government has no competence, and the country has procedures for deciding which minister goes.

That arrangement, in which a federated entity speaks for the state in Europe, is unusual and it follows logically from the domestic settlement. A federation that has genuinely transferred a power cannot then exercise it internationally, so it lets the entity that holds it do so.

What the language border actually is

The line dividing Dutch-speaking from French-speaking Belgium is not a description of where people happen to speak what. It is a legal boundary, fixed by statute, and the language regime of every municipality in the country is determined by which side of it the municipality sits on.

Fixing it was the decision that made the rest of the structure possible and permanent. Before it, the boundary moved with each census as language use changed, which meant every count was a territorial contest. Freezing the line ended that contest and converted the question from a demographic one into a constitutional one.

The cost was rigidity. Municipalities on the border have residents of the other language, and the arrangements made for them, known as facilities, allow certain dealings with the administration in the minority language. Those facilities have been argued about continuously for decades, because one side reads them as a permanent right and the other as a transitional measure that has outlived its purpose.

Around Brussels the friction is sharpest. The capital has expanded economically well past its regional boundary into Flemish municipalities, and francophone residents of those municipalities live under a Dutch-language regime. That mismatch between where people live and how their municipality is classified is the single most persistent local dispute in Belgian politics.

How the money is divided

Federalism in Belgium is expensive to run and the financing arrangements are where the political conflict is most concrete. The federated entities receive the bulk of their money through transfers from federal taxation rather than raising it themselves, with limited but growing fiscal autonomy added in successive reforms.

That design produces a predictable argument. An entity that spends money it did not raise has every incentive to spend and none to tax, and the entity that raises it has every incentive to attach conditions. Flemish parties have therefore pushed for financial and tax autonomy through every reform round, and francophone parties have resisted it, because the transfers run from the wealthier north to the less wealthy south.

The regional economic divergence underneath is real and long-standing. Wallonia industrialised first on coal and steel and declined when they did, Flanders industrialised later on ports, chemicals and manufacturing, and output per head and employment rates have differed between the two for decades.

Fiscal consolidation is now the federal problem sitting on top of all of it. The primary deficit widened to 3.4% of output in 2025 and consolidation is set to begin in 2026, with a structural primary balance improvement of around 0.5% of potential output expected in both 2026 and 2027, delivered through measures including a cap on unemployment benefits, incentives to reduce long-term sickness, a higher effective retirement age and a shift of household excise duties from electricity to fossil fuels.

What the federal level still holds

After six reforms the federal government retains defence, justice, foreign affairs, the currency through the euro, most of social security and the national debt. That is a real list, and it is shorter than in almost any comparable state.

Social security is the contested item. It is the largest federal spending block and it transfers resources between the regions in ways that are measurable, so proposals to regionalise it are proposals to end a transfer, which is why they are advanced by one side and refused by the other with equal consistency.

The German-speaking Community is the quiet success of the arrangement. Roughly 77,000 people in the east of the country hold their own parliament, government and competences in education and culture, which is a degree of autonomy for a small linguistic minority that few European states extend.

Brussels remains the hardest case and the reason the structure exists in its present form. It is the federal capital, the seat of the European Union institutions, a region, and a territory where both large communities operate services in parallel, and no reform has found a simpler arrangement that both sides accept. Belgium: history works through how the balance shifted and Belgium: economy what is actually being transferred.