How can De Wever’s government close Belgium’s new €7.7 billion budget gap?

Belgium’s federal Monitoring Committee confirmed on 6 July that Prime Minister Bart De Wever’s government must find an additional €7.7 billion by 2029 to respect the European expenditure path, confronting the five-party coalition with a much harder budget negotiation than it envisaged at the start of the legislature. The independent officials’ projection rises to €9.8 billion by 2031, while the government has indicated that it wants to assemble a package worth about €10 billion by the middle of October.

The report, published by the Federal Public Service Policy and Support, or BOSA, covers Entity I — the federal administration and social security — as well as Belgium’s combined public finances, which also include the regions, communities and local authorities. It estimates that the Entity I deficit will widen from €25.7 billion, or 3.9% of GDP, in 2026 to €44.5 billion, or 5.7% of GDP, in 2031 if policy remains unchanged. For all Belgian public authorities together, the deficit is projected to reach €48.5 billion, or 6.2% of GDP, in 2031, while public debt climbs from 110.7% of GDP in 2026 to 122.6% in 2031.

Those figures do not mean that the federal cabinet must produce €7.7 billion in cash immediately. They describe the structural improvement required by 2029 to bring growth in net primary expenditure into line with Belgium’s EU-endorsed fiscal path. The effort can therefore consist of recurring spending reductions, additional revenue or reforms that improve the balance over several years. It is separate from the headline deficit, which also contains interest payments and transactions outside the expenditure benchmark.

De Wever formally acknowledged the scale of the task in the Chamber of Representatives on 9 July. The Prime Minister told MPs that the €7.7 billion estimate was within the range anticipated by the government and said the coalition would seek consensus on what he called a sensible package. He nevertheless conceded that Belgium faced “very great difficulties” in the short term. In the same exchange, he argued that earlier reforms would slow the accumulation of debt and that additional defence spending, lower labour taxes and an exceptionally adverse geopolitical environment had made the exercise harder.

Deputy Prime Minister and Budget Minister Vincent Van Peteghem has treated compliance with the European expenditure path as the minimum objective rather than the end of Belgium’s fiscal repair. In an earlier response to the March monitoring report, Van Peteghem said ageing-related expenditure and rising interest charges were intensifying the pressure. His office estimated then that federal interest costs could approach €22.5 billion in 2031. The July update subsequently produced the larger €7.7 billion requirement by the end of the legislature.

The deterioration is important because the coalition was formed in February 2025 around a promise to combine labour-market and pension reforms with a gradual repair of the public finances. Its parties — the N-VA, MR, Les Engagés, CD&V and Vooruit — agree that the trajectory is unsustainable, but not on how the burden should be divided. The centre-right partners generally place more emphasis on containing expenditure and improving employment, while Vooruit insists that large fortunes and other strong financial shoulders must contribute. Differences also remain over how far the government can alter indexation, social benefits, healthcare budgets or consumption taxes without weakening purchasing power.

The July report sharpens that political conflict rather than settling it. Georges-Louis Bouchez, president of the governing liberal MR, told the Chamber that Belgium’s underlying problem was the growth of social expenditure and argued for lower taxes and stronger economic activity. That frame competes with the one advanced by French-speaking socialist leader Paul Magnette. The PS president blamed the coalition’s policy choices for weakening demand and proposed higher contributions from large fortunes, banks and the energy sector, alongside stronger action against major tax fraud. Raoul Hedebouw, president and parliamentary leader of the PTB-PVDA, similarly argued that the government should seek revenue from the wealthiest households rather than pensions, public services or wage indexation.

Organised labour is pressing the same distributional question. The socialist FGTB-ABVV called the monitoring report alarming and said the coalition should turn towards new revenue instead of further social cuts. Federal secretary Selena Carbonero Fernandez presented the union’s alternative as a multibillion-euro plan based on broader contributions from wealth and business. The government has not accepted that calculation, and the yields attached to many opposition and union proposals remain politically disputed.

Belgium’s federal structure adds a further layer. The federal cabinet controls federal taxation, social security, pensions, defence and most debt management, but it cannot directly rewrite the budgets of Flanders, Wallonia, the Brussels-Capital Region or the communities. Those entities have their own elected governments and budgets. Yet the EU and financial markets assess Belgium’s general-government position as a whole, so deficits outside Entity I still influence the national debt ratio and Belgium’s European commitments. Coordination is therefore necessary even though the immediate €7.7 billion negotiation belongs primarily to the federal level.

There is also a longer institutional memory behind the warning. Belgium reduced a very high debt burden during the run-up to monetary union, helped by primary surpluses and falling interest rates. The reverse dynamic now threatens: persistent primary deficits, ageing costs and higher refinancing charges can reinforce one another. The Court of Audit’s examination of the adjusted 2026 budget had already identified implementation risks, including delayed measures and revenue assumptions that had not fully reflected legislative slippage. That is why a package announced on paper will be judged not only by its headline value but also by whether its measures are recurring, legally operational and credibly costed.

The next decisive stage is the preparation of the 2027 federal budget and its multiannual path. De Wever wants an agreement around mid-October, ahead of the European budget timetable. Before then, ministers must decide how much of the package comes from spending, taxation, labour-market effects and tighter implementation of measures already announced. The €7.7 billion floor is now established; what remains unknown is who will pay, which programmes will change and whether all five coalition parties can accept the same answer.