The International Monetary Fund has warned EU finance ministers that defence, energy and pension costs could push public debt sharply higher unless governments combine reforms, spending restraint and, in some areas, common borrowing.
The International Monetary Fund has warned European Union finance ministers that the bloc faces a long-term fiscal squeeze from rising defence, energy and pension costs, reopening the political argument over whether the EU should use more joint borrowing to finance common priorities.
In a paper presented to EU finance ministers meeting in Nicosia, the IMF said member states would face large spending pressures over the next 15 years. Without policy changes, average public debt in the EU could rise to 130 per cent of GDP by 2040.
The warning comes as European governments are trying to raise defence spending, reduce energy vulnerability and manage ageing populations at the same time. Each of those pressures is already difficult. Together, they create a fiscal problem that cannot be solved only through annual budget adjustments.
The IMF’s recommendation was not limited to austerity. It called for a combination of structural reforms, fiscal consolidation and, where appropriate, common EU borrowing. The Fund argued that some areas, including defence, energy and innovation, should be treated as European public goods rather than as purely national responsibilities.
That distinction matters. If defence against a common threat benefits the EU as a whole, the case for financing some of it jointly becomes stronger. The same argument applies to cross-border energy infrastructure, climate resilience, industrial innovation and technologies that no single member state can fund efficiently on its own.
The political difficulty is that joint borrowing remains one of the most divisive questions in the EU. Southern member states, including Italy, Spain and France, have generally been more open to common debt instruments, particularly after the precedent set by the pandemic recovery fund. Germany and several northern countries have been more cautious, warning against turning emergency borrowing into a permanent feature of EU finances.
The IMF paper therefore lands at a sensitive moment. Europe is already under pressure to increase military readiness after Russia’s full-scale invasion of Ukraine and amid uncertainty over long-term US security commitments. NATO spending targets have moved higher on the political agenda, while European governments are being pushed to invest in air defence, ammunition, drones, cyber resilience, military mobility and defence industry capacity.
Defence spending is different from many other budget items because delayed investment can create capability gaps that are difficult to close quickly. Ammunition production, air-defence systems and military logistics require long procurement cycles and industrial planning. Yet many EU governments are already carrying high debt loads, making it harder to increase defence spending without cutting elsewhere or raising taxes.
Energy adds another layer. Europe has reduced its dependence on Russian gas, but the transition has not removed the cost of energy security. Investment is still needed in grids, storage, interconnectors, liquefied natural gas infrastructure, renewables, nuclear capacity in some member states, and protection of critical infrastructure. Higher energy costs also create political pressure for subsidies, compensation schemes and industrial support.
Pensions are the third major pressure point. Ageing populations will increase public spending in many member states, while smaller working-age populations could weaken tax bases. The IMF said reforms, including labour-market measures and pension changes, would be needed to prevent debt from rising further. Such reforms are politically difficult because they affect voters directly and often provoke resistance from unions, opposition parties and older citizens.
The Fund also argued that deeper labour mobility, more unified regulation and stronger private investment would help reduce the need for budgetary consolidation. The logic is that higher productivity and growth can ease debt pressure. But the EU has struggled for years to complete the single market in services, deepen capital markets and remove barriers to cross-border investment.
For Brussels, the warning is relevant to the next phase of EU budget politics. The Union’s existing budget is small compared with national spending, and most defence and energy decisions remain in national hands. Yet the scale of the challenges facing Europe increasingly points towards common financing, pooled procurement or shared investment vehicles.
That is already visible in defence. The EU’s SAFE instrument, designed to support defence investment through loans, reflects a broader shift towards collective financing of military capability. But even there, governments remain divided over flexibility, conditions and whether such schemes should be temporary or become part of a more permanent defence-financing architecture. Italy’s defence minister recently said his country had an “essential” need to use the SAFE scheme, while Rome has also pressed for more fiscal flexibility because of energy-related costs. The Italian case illustrates the budget pressure facing highly indebted countries trying to meet new defence demands.
The IMF’s intervention does not settle the argument over joint debt. It does, however, make clear that the EU’s fiscal debate is no longer about one isolated crisis. Europe is facing simultaneous structural pressures that will last well beyond the current budget cycle.
The choice facing member states is therefore not simply between discipline and borrowing. It is between fragmented national responses and a more coordinated approach to areas where the costs and benefits are shared across the bloc. Joint borrowing may remain politically contested, but the alternative could be uneven defence readiness, slower energy investment and wider divergence between member states with different fiscal capacity.
The IMF’s message to EU finance ministers is that the coming fiscal pressure is not temporary. Europe will either reform and finance common priorities more coherently, or face a long period of constrained budgets and difficult political trade-offs.
