Belgium Under De Wever: The Arizona Gamble and the Federal Split: Deluair Consultancy

The June 9, 2024 federal election delivered the most fragmented Belgian parliament since the Second World War. N-VA took 16.8 percent nationally and 24 percent in Flanders. Vlaams Belang reached 22 percent in Flanders without entering government under the standing cordon sanitaire. The Parti Socialiste held 17.3 percent in Wallonia, and the Mouvement Reformateur pulled 9.6 percent nationally on a center-right reset under Georges-Louis Bouchez. After 236 days of formation, the longest run since the 2010 to 2011 record, Bart De Wever was sworn in on February 3, 2025 as the first N-VA prime minister, leading a five-party Arizona coalition of N-VA, MR, Les Engages, CD&V, and Vooruit with 81 of 150 House seats. The coalition agreement of January 31, 2025 commits to roughly 9 billion euros of net tax cuts, a structural pension reform, a 10 percent capital gains tax, and a defense spending floor of 2 percent of GDP by 2029. The federal deficit closed 2024 at 4.4 percent of GDP under EU Excessive Deficit Procedure scrutiny, with public debt at 105 percent of GDP. Real GDP grew 1.0 percent in 2024 on BNB data and inflation ran at 4.3 percent in December 2024. Brussels has not formed a regional government since the election. This brief assesses the Arizona deal's coherence, the federal split risk, the Brussels vacuum, and the implications for multinationals, EU institutional investors, and asset managers.

The June 2024 election and the fragmentation map #

The June 9, 2024 federal election produced the most fragmented Chamber of Representatives in Belgian post-war history. Twelve parties cleared the federal threshold, and no bloc came close to a working majority on a single linguistic side. N-VA took 16.8 percent nationally and 24 percent in Flanders, recovering ground lost to Vlaams Belang in 2019 and reasserting itself as the largest Flemish formation. Vlaams Belang held 22 percent in Flanders, which under the standing cordon sanitaire still translates into zero ministerial portfolios at federal or Flemish level. Together the two Flemish-nationalist parties commanded roughly 46 percent of the Flemish electorate, the highest combined nationalist score on record.

South of the language border the Parti Socialiste held 17.3 percent of the Walloon vote, well below its historical floor and barely ahead of the Mouvement Reformateur, which broke through to 9.6 percent nationally and roughly 30 percent in Wallonia under Georges-Louis Bouchez. The Christian-democrat Les Engages, rebranded from cdH and led by Maxime Prevot, captured roughly 22 percent in Wallonia on a center-reform platform. Ecolo and PTB-PVDA both lost ground, with Ecolo dropping below the parliamentary threshold in several arrondissements. The result was a clear rightward shift in both Flanders and Wallonia for the first time since 1981, with no left-wing party in the eventual federal coalition for the first time in roughly four decades.

Party	Region	House seats	Vote share	Coalition
N-VA	Flanders	24	16.8 percent national	Yes
Vlaams Belang	Flanders	20	13.8 percent national	Cordon, no
MR	Wallonia and Brussels	20	9.6 percent national	Yes
PS	Wallonia and Brussels	16	8.4 percent national	No
Les Engages	Wallonia and Brussels	14	7.2 percent national	Yes
CD&V	Flanders	11	5.7 percent national	Yes
Vooruit	Flanders	12	5.9 percent national	Yes
PTB-PVDA	National	15	9.5 percent national	No
Open Vld	Flanders	7	5.2 percent national	No
Ecolo	Wallonia and Brussels	3	2.9 percent national	No

Belgian Chamber of Representatives composition after June 9, 2024 federal election

The Arizona formation and the De Wever government #

Coalition formation took 236 days, the longest run since the 541-day record set between 2010 and 2011. King Philippe appointed De Wever first as informateur on June 12, 2024, then as formateur in late August. The talks collapsed twice, in late August 2024 over fiscal architecture and again in early January 2025 over labor market measures, before Vooruit's Conner Rousseau and MR's Georges-Louis Bouchez signed off on a final compromise on January 31, 2025. The coalition was named Arizona for the colors of the participating parties, gold for N-VA, blue for MR, orange for Les Engages and CD&V, and red for Vooruit, which approximate the Arizona state flag. De Wever was sworn in on February 3, 2025 as Belgium's first N-VA prime minister, with MR's Maxime Prevot named deputy prime minister and minister of foreign affairs, and Vincent Van Peteghem of CD&V continuing as finance minister.

The five parties hold 81 of 150 seats in the Chamber, a four-seat working majority. The arithmetic is fragile by Belgian standards. CD&V at 11 seats and Les Engages at 14 are the swing actors, and Vooruit's 12 seats include several MPs from the Antwerp and Ghent federations who have publicly criticized the deal's pension and labor provisions. The cabinet portfolio split allocated finance, defense, and asylum and migration to N-VA, foreign affairs and economy to MR, social affairs to Les Engages, agriculture and welfare to CD&V, and labor and pensions to Vooruit. The N-VA-MR axis controls the fiscal and security perimeter, the historic French-speaking liberal-Flemish nationalist alignment that Belgian formation theory had treated as politically impossible before 2024.

The coalition agreement: tax, pension, and the EUR 9 billion package #

The 217-page coalition agreement signed January 31, 2025 sets out a five-year program built around three fiscal vectors. First, a net tax cut of roughly 9 billion euros over the legislature, dominated by a higher tax-free allowance, a reduction of the special social security contribution, and a flat-tax simplification of bracket thresholds. Second, a structural pension reform that lifts the effective retirement age, tightens early-retirement bonuses, harmonizes the public-private statutes, and introduces a part-time pension. Third, a new 10 percent capital gains tax on financial assets above an exemption threshold of 10,000 euros per year, the most material structural change to Belgian capital taxation since the 1962 income tax code.

The defense floor is the single most consequential security commitment. The agreement binds Belgium to reach NATO's 2 percent of GDP defense spending threshold by 2029, from roughly 1.30 percent in 2024 on NATO's official accounting, requiring an incremental 6 to 7 billion euros of annual defense outlay by the end of the legislature. Acquisition priorities include the F-35A program continuation, the CaMo land-forces partnership with France, additional MQ-9B drones, and Belgian participation in the European Sky Shield Initiative. The agreement also commits to a labor market activation package of approximately 4 billion euros in projected savings, tightening unemployment benefit duration to a maximum of two years for new claimants and reducing the implicit tax on second-earner labor.

The fiscal arithmetic and the EU Excessive Deficit Procedure #

Belgium closed 2024 with a general government deficit of 4.4 percent of GDP and a debt-to-GDP ratio of 105 percent on Eurostat's October 2025 EDP notification, the third highest in the EU after Italy and France. The European Commission opened an Excessive Deficit Procedure against Belgium in July 2024 alongside six other member states, and the Council adopted a fiscal trajectory in January 2025 that requires a structural deficit reduction of 0.5 percentage points of GDP per year over a four-year adjustment path, with an option to extend to seven years if the government commits to qualifying investment and reform. The De Wever government has signaled it will request the seven-year extension, on the basis of the defense spending ramp and the pension reform.

The arithmetic is tight. The 9 billion euros of tax cuts and the 6 to 7 billion euros of incremental defense outlay together generate roughly 15 billion euros of fiscal pressure by 2029, against a structural correction requirement of roughly 12 billion euros over the same horizon under the standard four-year path. The coalition's offsetting measures, principally the labor market reform, the pension parameter changes, the capital gains tax, and a series of departmental ceilings, are projected by the Federal Planning Bureau to deliver 18 to 22 billion euros over the legislature. The headline arithmetic balances on paper, but the back-loading of the pension savings and the front-loading of the defense ramp create a persistent deficit overshoot in 2026 and 2027 before the structural measures bite. BNB modeling suggests the general government deficit will sit at 4.6 percent of GDP in 2025 and 4.2 percent in 2026 before falling to 3.4 percent by 2028, only converging on the 3 percent reference value in the final year of the legislature.

Indicator	2023	2024	2025 estimate	2029 target
Real GDP growth, percent	1.3	1.0	1.1	1.4
Headline HICP inflation, percent y/y	2.3	4.3	2.6	2.0
General government deficit, percent of GDP	minus 4.2	minus 4.4	minus 4.6	minus 3.0
Public debt, percent of GDP	104	105	107	106
Defense spending, percent of GDP	1.21	1.30	1.50	2.00
Unemployment rate, percent	5.5	5.7	5.6	5.2

Belgian macro and fiscal trajectory under the Arizona coalition program

Brussels, the regional vacuum, and the seventh state reform #

The federal split is most visible in Brussels. The Brussels-Capital Region has not formed a government since the June 9, 2024 election, the longest regional vacuum on record. The initial PS-Vooruit-MR-Engages-Open Vld-Groen formation collapsed in April 2025 when Vooruit and PS pulled out over the Flemish-side arithmetic. The current talks center on an MR-Engages-Vooruit-CD&V configuration, but the Flemish-side requirement of two parties leaves the formation hostage to Vooruit. The region runs under caretaker executive Rudi Vervoort with no new ordinance budget, no STIB-MIVB refinancing, and no mandate to renegotiate security cooperation after the November 2024 Anderlecht shootings.

The seventh state reform is the latent question. The N-VA program calls for a confederalist reorganization that would devolve labor market policy, healthcare, and family allowances to the regions, dismantle the federal ministry of social security, and reduce the federal level to a coordinating shell. The coalition agreement parks the question, committing only to a dialogue on institutional reform with no constitutional revision in the legislature, but the special majority required for constitutional change, two thirds in each chamber plus a majority on each linguistic side, was not declared open ahead of the 2024 election, which forecloses formal reform until the next legislature. The De Wever bet is that Arizona delivers enough fiscal and security results to neutralize Vlaams Belang's 22 percent and to validate the N-VA strategy of governing federally rather than dismantling it. The downside is that a failure of the Brussels formation, a fiscal slippage that re-opens the EDP fight, or a social conflict over pension reform reactivates the confederalist impulse with N-VA in office, not in opposition.

Implications for multinationals, institutional investors, and asset managers #

For multinationals with Belgian operations, three vectors matter. The chemical and pharma cluster around Antwerp, Charleroi, and Brussels, anchored by Solvay, UCB, GSK Belgium, Janssen Pharmaceutica, and the BASF Antwerp complex, faces a stable corporate tax environment but a tightening labor regime that favors capital-intensive employers. Banking, dominated by BNP Paribas Fortis, KBC, ING Belgium, and Belfius, faces a new 10 percent capital gains tax that will alter the wealth management product mix, plus a continuation of the bank levy. Defense industrials, including FN Herstal, Thales Belgium, John Cockerill Defense, and Sabca, face a structurally larger domestic procurement budget, with FN Herstal renewing its Belgian small arms framework in late 2025. The negative signal is the ArcelorMittal Liege closure announced in 2024, which removes the last integrated steel footprint in Wallonia and concentrates Belgian steel production at the Ghent flat-products complex.

For EU institutional investors, the Belgian sovereign curve trades at roughly 65 to 75 basis points over the Bund 10-year, in line with France and inside Italy and Spain. The fiscal trajectory implies the spread compresses if the EDP path is met, and widens by 30 to 50 basis points if 2026 slippage triggers a Council-level corrective recommendation. The OLO 10-year auction calendar in 2026 carries roughly 42 billion euros of gross issuance, manageable against a Eurozone backdrop of moderate ECB easing. For asset managers, the capital gains tax design matters more than the rate. The 10 percent rate with a 10,000 euro annual exemption and a step-up basis at the law's entry into force is structured to preserve the Belgian funds and SICAV ecosystem and to avoid a domicile flight to Luxembourg, but the operational implementation through the QI regime and the financial intermediary withholding mechanism remains under royal decree drafting through Q3 2026.

The political risk concentration for any Belgian exposure is therefore not the De Wever government's collapse, which the parliamentary arithmetic makes unlikely before 2027, but the Brussels regional vacuum, a fiscal slippage that reopens the EDP fight, and a social conflict over pension reform that drives Vooruit out of the coalition. Each carries a 20 to 30 percent probability over the legislature on our reading, and any two in combination would force the cabinet into governing by royal decrees and special powers laws, the institutional pattern that produced the 2010 to 2011 deadlock.

Sources #

Cite this brief

@misc{hossen2026belgiumdewever2026,
  author = {Hossen, Md Deluair},
  title  = {Belgium Under De Wever: The Arizona Gamble and the Federal Split},
  year   = {2026},
  url    = {https://deluair.com/consultancy/insights/belgium-de-wever-2026},
  note   = {Deluair Consultancy briefs}
}

Hossen, M. D. (2026). Belgium Under De Wever: The Arizona Gamble and the Federal Split. Deluair Consultancy briefs. https://deluair.com/consultancy/insights/belgium-de-wever-2026

Hossen, Md Deluair. "Belgium Under De Wever: The Arizona Gamble and the Federal Split." Deluair Consultancy briefs, 2026-04-26. https://deluair.com/consultancy/insights/belgium-de-wever-2026.

On the watchlist

Upcoming dates that bear on this brief.

See the full firm watchlist for the rest of the calendar.

December 1, 2026 Election

Belgium Brussels regional government formation

Whether Brussels regional government forms before federal capital gains tax design finalizes, and impact on Solvay/UCB/GSK chemical-pharma cluster.

Related insights

Adjacent reading.

Electoral and political intelligence

Belgium Under De Wever: The Arizona Gamble and the Federal Split