As war rages on Europe’s borders, the continent is rediscovering the hard truths of military preparedness. Political leaders are responding with pledges, increased procurement, and renewed focus on collective defence. Yet one domain remains dangerously overlooked: the financial architecture that underpins credible deterrence.
António Brás Monteiro is a EU and NATO affairs specialist, serving as a defence expert at the European Commission and as a member of the NATO Industrial Advisory Group. He holds board positions in various security and defence institutions and companies, and has published articles in Forbes, EUobserver, Diário de Notícias, European Security & Defence, Segurança & Defesa, among others.
As war rages on Europe’s borders, the continent is rediscovering the hard truths of military preparedness. Political leaders are responding with pledges, increased procurement, and renewed focus on collective defence. Yet one domain remains dangerously overlooked: the financial architecture that underpins credible deterrence. We speak of readiness and resilience, but without a secure and strategically aligned fiscal foundation, these ambitions risk becoming illusions. Finance is not auxiliary to defence. It is its silent core.
The European Union is rearming at a pace not seen in decades. Over €900 billion is expected to be invested in capability development over the next ten years through the European Defence Fund and the ReArm Europe initiative. That momentum gained further traction this month when EU Member States approved a €150 billion joint loan facility to accelerate procurement. It is a significant step. But its impact will depend on discipline, oversight, and cohesion.
Another milestone came with the new EU–UK defence cooperation agreement signed in May. Despite Brexit, both sides acknowledged that European security cannot be compartmentalised. The agreement re-establishes structured collaboration in procurement and innovation. It is a timely and pragmatic realignment that strengthens Europe as a whole.
This evolving partnership may soon take a bolder turn. According to recent reports, Brussels and London are considering a Global Defence Bank to coordinate long-term investment in defence capabilities and industrial scaling. If realised, such an institution could offer credit guarantees, joint procurement financing, and strategic capital that traditional mechanisms lack. It would mark a significant leap towards aligning Europe’s defence ambitions with dedicated fiscal infrastructure, transforming financial coordination from an afterthought into a pillar of deterrence.
Yet key weaknesses persist. As noted in recent strategic forums, the pace of rearmament is already outstripping Europe’s ability to steer it coherently. Fragmentation, bottlenecks, and competition for limited industrial capacity continue to hinder delivery. The foundations needed to direct, finance, and protect this mobilisation remain fragile, especially where defence and finance intersect.
The European Investment Bank has begun to adjust its posture, unlocking more than €9 billion for defence-linked infrastructure and technology. ESG frameworks are also being reconsidered, acknowledging that excluding defence from sustainable finance tools risks undermining strategic autonomy not through politics, but financial hesitation. These are necessary changes, but still modest in scale.
NATO is also entering a new financial phase. With member states moving toward a 5% of GDP defence benchmark, it is clear the battlespace has expanded. The weaponisation of energy, capital, and cyberspace has made it essential for finance ministers and central banks to become part of security policy. This need has been stressed in recent closed discussions. NATO is beginning to respond, developing financial resilience frameworks and integrating economic intelligence into its posture.
The United Kingdom’s role remains vital. Beyond its defence and intelligence capabilities, Britain’s financial depth shapes the broader European ecosystem. Prime Minister Starmer’s proposed “defence dividend,” aligning public investment with industrial capacity, reflects growing convergence between fiscal and strategic goals. The EU–UK pact builds on this shift. London’s position as a hub for risk assessment, insurance, and defence-related capital flows is not only a British strength, but a European one.
Still, vulnerabilities remain. Dual-use sectors and critical technologies are increasingly financed or controlled by foreign entities with divergent interests. Sovereignty today is not just about who commands armed forces. It is also about who owns the intellectual property and supply chains that sustain them. In this context, opacity is not a regulatory gap. It is a strategic liability.
Procurement irregularities are re-emerging across transatlantic structures. While not all cases are public, concern is growing. Financial misconduct in the defence sector is not just corruption. It erodes trust, weakens readiness, and creates opportunities for exploitation.
Intelligence services already understand the stakes. Across allied countries, agencies are mapping financial vulnerabilities, tracking opaque capital flows, and flagging infiltration risks. The challenge is not awareness, but alignment. Too often, their assessments fail to translate into action due to political hesitation or institutional inertia. As the boundary between fiscal stability and national security dissolves, economic intelligence must be treated not as technical support, but as a strategic capability. These efforts exist. Europe’s financial and political structures must now catch up.
A deeper contradiction remains unresolved. Europe is mobilising to rearm, yet operates under fiscal orthodoxies shaped for a different era. Investors remain cautious. Budgetary frameworks still treat defence as deviation rather than necessity. This mindset is outdated. If Europe is serious about defending its values and borders, it must rethink its financial doctrine.
The first strike in the next conflict may not be kinetic. It could come through a hostile acquisition, a bond market disruption, or a disinformation campaign triggering investor panic. These are no longer hypothetical risks. They are part of the operational threat environment.
Rearmament has returned to Europe. So has the opportunity to align capabilities with financial strategy. The frameworks are forming, and the urgency is real. But without coherence, political resolve, and strategic discipline, Europe risks building a patchwork of ambitions rather than a credible deterrent force.
Strategic resilience is not a slogan. It is a system. And it begins with finance.