Belgium faces a €6 billion budget shortfall

Belgium's federal deficit hit 5.2% of GDP in 2025, and public debt is on track to reach 115% of GDP by 2028 (NBB-linked report). The government has approved a mid-year budget correction and started work on a multi-year savings path. The measures discussed so far add up to roughly €7 billion. The National Bank of Belgium says the country needs about €13 billion (Brussels Times). That gap is the story.

A budget correction is what happens when a government reopens its approved annual spending plan because the assumptions behind it have shifted. Belgium's problem runs deeper than one year's numbers going wrong. GDP growth is expected to slow to 0.6% in 2026, and without further action the deficit could widen to 5.7% by 2028 (NBB-linked report). The population is ageing, which pushes pension and healthcare costs up. And Belgium must refinance old debt at today's interest rates, which are higher than when that debt was first issued.

Why growth sits in the denominator

The debt-to-GDP ratio is a fraction. If the economy shrinks while the government tightens, the ratio can worsen even as spending falls. ING projects that Belgium's budget cuts will slow growth (Belga/ING). A poorly designed package can deliver pain for households while leaving the debt path largely unchanged. That is the central risk: austerity that fails on its own terms.

Where the cuts land matters as much as their size. Which households lose benefits? Which public services shrink? Do companies receive offsetting tax breaks? The government has not said. Prime Minister Bart De Wever told coalition leaders to avoid "far-fetched" proposals and declared the "magic wand" of new taxes exhausted (Brussels Times). That is a political position. The government has not published an analysis showing why revenue-side options are spent. Closing loopholes and exemptions for companies, adjusting deductions that reduce state revenue, shifting tax weight from wages toward wealth: none of these have been publicly ruled out with evidence. If the revenue side is declared closed before it is examined, the entire adjustment falls on spending, and on the people who depend on it most.

A promise Brussels will test

Belgium's correction matters beyond its borders because the EU's reformed fiscal rules are supposed to discipline exactly this kind of case: a wealthy, politically complex founding euro-area member running a deficit well above the 3% of GDP ceiling (European Commission). The new rules ask governments to show a credible spending path for several years. A single parliamentary vote proves nothing. Credibility means the deficit falls because policy changed, not because growth briefly improved or a one-off measure flattered the accounts.

Belgium is not the only country in this position. France reported a 5.1% deficit in 2025, with debt above 117% of GDP and interest charges projected at €77.4 billion in 2026 (Le Figaro, Boursorama/Reuters). BNP Paribas Economic Research found that Belgium needs to cut its primary deficit (the budget balance before interest payments) by about 3 percentage points of GDP over four years, and concluded that Belgium, Finland, France and Italy have not achieved comparable consolidation in the period they studied (BNP Paribas). History says the default assumption should be scepticism.

What comes next

The next test is the full multi-year plan. Belgium must show that its budget stabilises debt even if growth disappoints and refinancing stays expensive. The €6 billion gap between what the government is discussing and what the central bank deems necessary is either future measures yet to be named, or a promise the government already knows it cannot keep.