Government agreement, formateur, informateur: the glossary

What is a formateur in Belgium?

A formateur is the person the King tasks with building a majority between several parties and steering talks through to a government agreement. Before that agreement exists, the formateur runs nothing. The job is to bring together parties that are not yet governing side by side, settle the last sticking points, then propose a team of ministers once the deal is signed.

Nothing in the Constitution describes this role. The formateur is a political custom, dating back to the interwar years and never written into any law. That absence of a formal framework leaves the King wide latitude over who gets picked and when the mandate ends. In recent practice, the formateur almost always becomes the next prime minister.

Bart De Wever was appointed formateur on 10 July 2024, a month after the elections of 9 June. He handed back his mandate on 22 August, over disagreement on the budget. Recalled on 1 September, he eventually reached a five-party deal on 31 January 2025, before being sworn in as prime minister on 3 February.

Informateur, preformateur, "démineur": what do the roles before the formateur do?

The formateur is almost never the first person appointed. Before that stage, the King usually hands a smaller task to someone else, under a different title depending on what is expected of them.

The informateur writes a report on the balance of power and the possible combinations, without negotiating a programme, a role dating back to 1935. The preformateur goes one step further and prepares ground that has already been mapped out. Elio Di Rupo held that title in June 2010, before becoming formateur and then prime minister.

Over the years, the King has also invented other titles for other crises. Herman Van Rompuy was an "explorateur" (explorer) in 2007, tasked with restarting stalled talks. Jean-Luc Dehaene was a "démineur" (minesweeper) in early 2010, trying to stop the Leterme government from collapsing. Bart De Wever, again, was a "clarificateur" (clarifier) in October 2010, and Johan Vande Lanotte a "conciliateur" (conciliator) that same month. None of these titles appears in any official text: they are labels invented for the occasion.

What is a government agreement, and what does it commit anyone to?

A government agreement is the text negotiated by the parties set to form a majority, laying out the incoming cabinet's programme for the legislature. It has no legal existence of its own. No act, no decree, no royal order enacts it: its only force is political, resting on the parties that signed it.

The Arizona agreement, between N-VA, MR, Les Engagés, CD&V and Vooruit, was concluded on 31 January 2025. It covers a socio-economic chapter, a budgetary one and an institutional one, each the product of compromise between five parties with different priorities. This site does not compare government agreements against each other: it compares the positions each party states, topic by topic, in the comparator.

A caretaker government, what can it still decide?

Three categories of business, nothing more. A government that has resigned keeps the power to run day-to-day administration, finish work already under way, and handle whatever cannot wait without harming the State. It cannot make any new political choice.

The notion has broadened since the 1970s. A budget, a European treaty, a military deployment abroad: what once counted as a full freeze has, case by case, ended up filed under "urgent business". The De Croo government stayed in caretaker mode from 9 June 2024 to 3 February 2025, close to eight months. Throughout that period, it kept representing Belgium in European bodies. It settled no new reform, though, for lack of a majority to carry one.

What is a constructive vote of no confidence?

Article 96 of the Constitution sets out the exact terms. The federal government hands in its resignation to the King if the Chamber of Representatives, by an absolute majority of its members, adopts a motion of no confidence that proposes, at the same time, a successor to the prime minister.

"Constructive" means this: MPs who want to bring down a government must agree, on the same day, on who replaces it. There is no voting a government out without already knowing who comes in. The mechanism dates from the 1993 constitutional reform and has, since then, never once brought down a federal government: thirty-three years without a single case. It has worked at regional level, though, replacing the Walloon government of Paul Magnette with that of Willy Borsus on 28 July 2017.

The confidence vote: the same test, run the other way

The initiative changes side. A motion of no confidence starts in Parliament, which attacks the government. A confidence vote starts with the government itself, which asks the Chamber to confirm its backing before carrying on. If confidence is refused, Article 96 requires the Chamber to propose a successor within three days, on pain of dissolution.

Where do Belgian coalition nicknames come from?

From their colours, almost always. The press and the parties themselves name a coalition, real or hypothetical, after the colours tied to each party in it.

• The rainbow coalition brought together liberals, socialists and greens at federal level between 1999 and 2003, under Guy Verhofstadt: blue, red, green, the colours of the spectrum.
• The Swedish coalition joined N-VA, MR, CD&V and Open VLD in 2014, under Charles Michel: yellow and blue, the colours of the Swedish flag.
• The Vivaldi coalition brought together six parties, including socialists, liberals and greens, under Alexander De Croo from 2020: four colours for the composer's four seasons.
• The Arizona coalition, formed by N-VA, MR, Les Engagés, CD&V and Vooruit in 2025, takes its name from the flag colours of the American state of the same name.

None of these names says whether the coalition governed well or badly. They are composition markers, not verdicts.

The glossary as a table

How long did the last government formation take?

239 days.

That is the time between the elections of 9 June 2024 and the swearing-in of the De Wever government, on 3 February 2025, well short of the Belgian record. The country's longest formation ran from 13 June 2010 to 6 December 2011, the day the Di Rupo government was sworn in: five hundred and forty-one days, roughly 2.3 times the length of 2024-2025. Only Northern Ireland, left without a full executive for 1,095 days between 2017 and 2020, does worse in a global ranking published in 2025, with a major caveat: the UK central government kept legislating in its place throughout that period, something that has never happened in Belgium.

A caretaker government runs the country in the meantime. That is not a power vacuum. It is a reduced power, lasting exactly as long as it takes a formateur to land a deal.

This glossary describes mechanisms, not choices. A formateur, a government agreement or a vote of no confidence say nothing about the quality of any party's ideas. The ten parties' stated positions are compared topic by topic in the comparator and summed up in the ranking, whose methodology explains its limits. To place these mechanisms within Belgium's wider institutional architecture, the articles on Regions and Communities and on the D'Hondt method complete this glossary.

Sources: Belgian Senate, Constitution, Article 96; CRISP, Vocabulaire politique, entries on "formateur", "affaires courantes", "motion de méfiance" and "coalition"; VRT NWS, on the 31 January 2025 government agreement and the 3 February 2025 swearing-in; La DH, on royal mission titles, from explorer to clarifier; Wikipedia, on Article 96 of the Belgian Constitution and the 2010-2011 Belgian political crisis; CNEWS, global ranking of the longest spells without a government, 23 September 2025; Wikipedia, on coalitions in Belgium.