Thirty-Nine Percent

Luxembourg has long prided itself on fiscal discipline. The Grand Duchy's public debt has hovered well below the European average, a point of pride for successive governments. That reputation may be tested in the coming years.

According to the latest projections from the International Monetary Fund (IMF), Luxembourg's public debt is expected to climb from 26.5% of GDP in 2025 to 39% by 2031. The trajectory would push the country past a critical threshold: if the forecasts prove accurate, Luxembourg would no longer meet the Maastricht criteria from 2029 onwards, as the government deficit would exceed the 3% of GDP ceiling set by the European Union.[1]

The primary driver behind the projected rise is the cost of the government's tax reform. Whether the reform's costs have been underestimated is now a matter of parliamentary debate. Green Party MP Sam Tanson submitted an urgent parliamentary question to Finance Minister Gilles Roth, asking whether the government shares the IMF's assessment, whether the tax reform's price tag may be higher than projected, and whether current fiscal policy should be revised in light of the new numbers.[1]

The Maastricht criteria, established in 1992, require EU member states to keep government deficits below 3% of GDP and public debt below 60% of GDP. Luxembourg has historically stayed well within these limits. A breach would not trigger immediate sanctions, but it would subject the country to the EU's excessive deficit procedure, requiring corrective action and inviting scrutiny from Brussels.[2]

39% of GDP is still well below the 60% Maastricht ceiling for debt. The more immediate concern is the deficit crossing 3%. The IMF's projections suggest this could happen as early as 2029, barely three years away. By the time the breach occurs, corrective measures would need to be already in motion, not merely under discussion.

The question from Tanson is straightforward: did the government underestimate the cost of its own reform? The answer from Roth will shape whether Luxembourg adjusts course now or waits for the IMF's projections to become reality.