NEWSROOM – Cutting Europe’s €800 billion Gordian knot: Five catalysts to transform defense

Cutting Europe’s €800 billion Gordian knot: Five catalysts to transform defense

13 November 2025

McKinsey & Conpamy

By with 

Europe is at a critical juncture in its defense transformation, facing an urgent need to reinforce collective deterrence and resilience in the face of an evolving security landscape.

The commitment to increase defense spending to 3.5 percent of GDP by 2035, amounting to over €1 trillion, underscores the scale of this endeavor. This white paper draws a parallel to the Gordian knot, emphasizing the need for bold and decisive actions to cut through the complexities and deliver effective solutions. Key data highlights include the projected increase in defense spending from 2.4 percent of GDP today to 2.9 percent by 2030, reaching approximately €800 billion, and the potential creation of up to 1.2 million new jobs across Europe due to production increases to meet additional equipment spending.

To achieve these goals, the paper proposes five key catalysts: adopting multispeed procurement approaches tailored to different types of acquisition, building an industrial base ready to scale in response to crisis demands, mobilizing collaboration to expand capacity and drive innovation, fast-tracking and localizing the supply of critical raw materials, and prioritizing the availability and upgrading of legacy military equipment. By bridging government ambition with effective industrial execution, Europe has the opportunity to turn urgency into renewal, strengthening its security, driving economic growth, and advancing its technological leadership.

The scale of the challenge

The war in Ukraine has altered the security landscape in Europe, underscoring the need for its nations to adapt their defense strategies and capabilities. This conflict has particularly demonstrated the importance of scaling the industrial base, rapid innovation, agile supply chains, and the effective and efficient integration of advanced technologies, such as drones, which have proven to be game changers on the battlefield. It has been over three and a half years since the full-scale invasion of Ukraine, and the rapid advancement of civilian technologies, especially AI, is changing the character of warfare.

In response, Europe’s NATO members have fundamentally shifted their strategic posture and are making a commitment—unprecedented since the end of the Cold War—to strengthen their defense capabilities and readiness to increase deterrence. By 2035, they have committed to increasing core defense spending to 3.5 percent of GDP1—equivalent to over €1 trillion.2 Based on a balanced acceleration toward this 3.5 percent target and current ramp-up rates, spending is likely to increase from today’s 2.4 percent of GDP3 to 2.9 percent by 2030, or roughly €800 billion. This represents a significant acceleration, as defense budgets have already doubled since 2019, growing by nearly €250 billion.4 Over the next five years, they are set to rise by an additional €300 billion (Exhibit 1).

Of the projected €800 billion in total defense spending in 2030, €335 billion is expected to be allocated toward equipment and equipment-related R&D, while the remaining €465 billion will cover personnel, military infrastructure, maintenance, and operations. The growth in equipment-related spending is particularly significant: It is forecast to be nearly nine times higher—almost €300 billion more—than the €37 billion spent in 2014.5 It will also be €165 billion more than in 2025, nearly doubling in just five years.6 Furthermore, it means that by 2028, Europe is projected to exceed the 2025 level of the United States’ equipment spending (Exhibit 2).7

Meeting the investment ambition to rebuild European deterrence will require a marked increase in industrial output. Today, the value of European defense industry output sold within Europe is approximately €100 billion annually, while the forecasted demand for equipment in 2030 is around €335 billion. This means there is an opportunity for European industry to expand production by up to €235 billion per year.8 The alternative is for Europe to bridge this delta by buying from outside the region. If Europe continues to import at the current rate of 40 percent, it will mean spending around €130 billion of the equipment budget overseas, with €200 billion allocated to homegrown production.9

The potential benefits of increased equipment spending extend beyond the defense sector. Based on available data, and assuming no changes to productivity,10 the additional €165 billion in annual equipment spending could create up to 1.2 million new jobs across Europe—over 0.5 million in direct operations (on top of the 0.6 million already employed in the defense sector) and more than another 0.6 million in associated supply chains.11 For context, around 0.7 million people are employed in direct operations in the German automobile industry.12 However, while the opportunity may be clear, it comes at a challenging time: Europe is losing one million workers per year due to aging demographics,13 making it increasingly difficult to ramp up industrial capacity and fill these new roles.

As such, Europe will need to identify potential employees to serve the needs of the defense industry, along with associated reskilling and retraining programs. This will be made easier if there is close coordination among governments, educational institutions, and industry to align skills development with emerging technological and production demands. While defense spending has the potential to drive employment and prosperity, success will depend on the ability of the industrial base to scale quickly enough to retain as much spending as possible within the continent while also strengthening economic resilience.14

By 2028, Europe is projected to exceed the 2025 level of the United States’ equipment spending.

The scale of the increase in defense spending is particularly striking, especially when compared to other major public investment initiatives. For context, the incremental defense spending of this decade, compared to 2021 levels, will total almost €2.5 trillion—roughly equivalent to Italy’s current GDP.15 However, this surge in investment comes after three decades of reduced budgets, during which Europe experienced what is often referred to as a “peace dividend,” which was over €7 trillion.16 As a result, military forces were downsized, equipment and ammunition inventories declined, and much of the active military equipment was subjected to wear and tear. Meanwhile, industrial capacity—including infrastructure and workforces—contracted and aged. More recently, a significant portion of Europe’s military inventory has been donated to support Ukraine.

This scale of change—redeploying funds, building industrial capacity, and expanding new workforces—is not without historical precedent, at least in times of war. For example, Ukraine has increased its defense industrial output more than 30-fold since 2022,17 and the United States expanded its defense spending as a share of GDP nearly 30-fold between 1940 and 1945.18 Additionally, the United States increased its defense spending by two and a half times between 1979 and 1987, a period that partially coincided with military buildup under the Reagan presidency.19 Today, the overarching goal of investing in defense capabilities is to establish credible deterrence, ensuring that Europe can avoid reaching the point where military intervention measures become necessary.

Transforming every aspect of the defense system is a complex undertaking. Europe has set itself the challenge of strengthening its defense capabilities in a way that bolsters deterrence, ensures security, and fosters the conditions for long-term peace and stability. The next section explores some of the most pressing challenges in achieving this transformation.

The transformation required is vast and complex

Economically, defense is a unique activity: Large forces are created, and vast sums are spent to build military capabilities and societal resilience, with the aim of achieving credible deterrence so that these capabilities never have to be deployed. The effectiveness of these investments depends on sustained societal support,20 political will,21 and the adoption of the latest technology to maintain an advantage over potential adversaries. Though governments fund these efforts, their success ultimately hinges on industrial power and innovation (Exhibit 3).

As the Draghi report22 on European competitiveness highlights, success will require reforming the underlying mechanisms that drive investment, innovation, and cross-border collaboration. Indeed, the past offers a cautionary tale: Europe’s historical approach to industrial policy and defense investment has often resulted in inefficiencies, delays, and missed opportunities to achieve greater strategic independence. Fragmented decision-making, slow and non-standardized certification processes, and limited private funding have affected Europe’s ability to translate ambition into action. Structural barriers—such as differing national priorities and protracted regulatory processes—could affect the region’s ability to achieve its ambitious goals, leaving critical gaps in both defense readiness and economic competitiveness.

Additional €165 billion in annual equipment spending could create up to 1.2 million new jobs across Europe.

Europe’s starting point presents a mixed picture. With over two million military personnel, NATO Europe is one of the world’s largest combined military alliances. Yet, these forces are widely seen as lacking the investment, stockpiles, and interoperability needed to deter or sustain large-scale conflict.23 Addressing these gaps while maintaining peacetime societies requires engaging a complex network of actors, each playing a critical role—a challenge we refer to as the Gordian knot of European defense.24 This knot comprises six interdependent issues: defining the future battlefield, accelerating procurement, scaling industrial capacity, mobilizing capital, fostering innovation, and addressing workforce gaps. Each issue is formidable on its own, but together they represent a transformation of unprecedented scale and complexity—a challenge for the next decade. We describe each of these issues below and then offer recommendations on how to start cutting through the knot: via five concrete, immediate areas of action.

First, in today’s rapidly evolving geopolitical and technological landscape, it is widely accepted that the way militaries will address conflict in the future has changed.25 However, NATO’s military forces—shaped by different legacies and starting capabilities—are unlikely to simply replicate the innovative approaches taken by Ukraine. This divergence has created a critical gap in conceptual thinking, leaving governments unable to finalize unified plans for force development, define the capabilities required, or determine which equipment to prioritize. Without this conceptual underpinning, the adoption of innovation and the pace of modernization will likely falter.

Second, three decades of reduced defense spending have given rise to bureaucracies designed to prioritize financial accountability and procurement risk reduction—often at the expense of acquisition speed and military efficiency. While these systems have their strengths, adapting them to strike a balance between innovation, speed, and efficiency in procurement has proven to be a complex challenge. In parts of Europe where urgency has been highest, such as countries purchasing equipment and ammunition for Ukraine, alternative bodies and processes—rather than conventional approaches—have often been used. This underscores the challenge of reforming entrenched systems to meet the demands of the rapidly changing defense environment.

Third, over the past decades, the defense industry has adapted to the demands of its customers, operating with limited engineering and manufacturing capacity and minimal flexibility. Compounding this, the tendency of defense ministries to place small-scale orders has led to inefficiencies and low-productivity processes and facilities. Historically, periods of increased orders or critical demand have been short-lived, often leaving capacity investments to become stranded assets once demand subsides. As a result, many defense contractors remain cautious, balancing share buybacks and reinvesting retained earnings into capacity expansion. Today, industry faces an urgent need to scale capacity, improve productivity, build resilient supply chains, and innovate ways of working to meet the challenges ahead—all while remaining cautious about overproduction in a still uncertain environment.

Success will depend on transforming the fundamental systems that shape investment, innovation, and cross-border collaboration.

Europe also faces a critical question about the level of self-sufficiency it can realistically achieve in defense. In many areas of defense technology, Europe lags behind or faces substantial gaps. In most cases, fragmentation across products, technologies, and engineering investments holds Europe back and increases system costs. These fundamental challenges in defense industrial strategy have historically proven difficult to resolve. As a result, Europe has relied heavily on imports, and a significant share of the additional public funds allocated to defense could flow outside the region. To address these challenges, scaling the defense industrial base in a way that enhances innovation, capacity, productivity, and European strategic independence will be the critical enabler of effective European deterrence.

Fourth, funding and capital are essential to support government orders, expand industrial capacity, and build much-needed stockpiles. While European NATO governments have committed to the 3.5 percent defense spending target,26 the pace of spending growth varies significantly across countries. The aforementioned tendency to issue short-term or sub-scale purchasing contracts further complicates efforts to underwrite investments. Mobilizing all forms of capital, including fostering clarity and confidence among investors, will be crucial to securing long-term capacity growth.

Fifth, creating an innovation ecosystem that works is crucial to ensuring that European NATO forces have a real edge in the rapidly changing environment of modern conflict. While private capital investors, such as private equity and venture capital, are critical enablers already making a difference, more is needed. For example, the US Army’s recent announcement of a plan to use private capital firms, such as Apollo, Carlyle, and KKR, to drive a $150 billion infrastructure overhaul across areas like computing and rare earth processing, demonstrates how innovative approaches can be employed to tackle long-standing challenges.27 Success will require many changes, such as: learning from ongoing innovation in live conflicts, clear demand signals from defense front-line forces and procurement agencies, access to growth capital (to follow early-stage investments), incentives for traditional industry to source from innovators and invest their own capital in R&D, rapid adoption, experimentation, and new approaches to replace stockpiling for rapidly changing technologies. All this must happen alongside the enduring need to secure and scale supply chains for already existing products and services. There are already leading examples in Europe of innovator scaling and collaboration between traditional and new players. However, compared to the scale of the challenge, much more is needed.28

The real challenge is not the necessity of this change, but whether Europe can harness the collective will, resources, talent, and creativity to achieve its ambitions.

Finally, human capacity underpins every aspect of this transformation. In Poland alone, military forces are planned to grow by hundreds of thousands, with other countries, such as Germany, also planning expansions.29 Altogether, total military growth across Europe could exceed one million personnel (including reserves). At the same time, meeting the industrial demands of expanded defense production could require an additional 1.2 million workers in direct operations and associated supply chains. However, like other sectors, defense faces challenges related to declining birth rates and difficulties filling semi-skilled manual roles (common to both defense and non-defense industrial sectors). Addressing this workforce gap represents a major challenge for Europe’s defense ambitions.

In short, Europe’s defense transformation is a vast and complex endeavor that requires every part of the ecosystem to evolve in parallel. The question is no longer whether this change is necessary, but whether Europe can marshal the resources, talent, and ingenuity to deliver on its ambitions. If Europe fails to take the Draghi report’s recommendations seriously, it risks undermining its own bold efforts.

If Europe were required to simultaneously decide how to fight in the future, reform defense procurement processes, build industrial capacity, align R&D and manufacturing efforts across the continent, and deploy €800 billion all in one step, the task would seem insurmountable. However, that is not the case. Progress can be made quickly in every area: Leaders with ambition can learn, set examples, and deliver on strengthening the continent’s deterrence. In all these efforts, the best must not become the enemy of the good. Success will depend on governments, industry, innovators, and capital providers adapting their risk appetites and working together to cut the Gordian knot of European defense.

Achieving success will require governments, industry, innovators, and capital providers to collaborate in cutting the complexities of the Gordian knot of European defense.

Five catalysts to turn commitment into capability

Given the complexity and level of collaboration needed to fully cut through the Gordian knot described above, we identified five catalysts to focus on today that could help accelerate the modernization and growth of European deterrence.

Notably, they all involve government and industry working together, and most envisage a role for capital providers to accelerate capacity building.

  1. Adopt a multispeed acquisition model
  2. Build a scalable industrial base held at readiness
  3. Unlock collaboration to drive industrial capacity and innovation
  4. Fast-track and localize the supply of scarce raw materials
  5. Prioritize availability and upgrades to legacy platforms

1. Adopt a multispeed acquisition model

Regardless of the procurement model chosen for each equipment item, a clear allocation of responsibilities and authorities is essential to prevent confusion. Transparent and streamlined decision-making processes help drive faster action. Some governments are already taking steps in this direction. For example, Canada recently established a new Defence Investment Agency (DIA) to modernize procurement by centralizing expertise and decision-making.31

Governments could:

  • Create differentiated acquisition pathways based on speed, oversight, and risk tolerance, while also reflecting the system’s criticality and function
  • Empower rapid prototyping and field experimentation through streamlined approvals and flexible contracting
  • Accept higher managed risk in lower-tier programs to accelerate learning, iteration, and deployment

Industry could:

  • Design modular, software-defined systems that enable ongoing upgrades and continuous capability refresh
  • Collaborate early with government teams to advise on rapid acquisition models and shorten decision cycles
  • Apply agile development and testing practices to deliver affordable, adaptable solutions at speed

2. Build a scalable industrial base held at readiness

Military capability rests on industrial power, and large-scale conflicts have consistently demonstrated the importance of resupply and continued innovation at scale.32 Europe needs a resilient defense industrial base that can quickly and comprehensively respond to crises. Even in peacetime, a core component of deterrence is the belief—among both allies and adversaries—that Europe can quickly replenish its resources and adapt to changing circumstances.

As such, true resilience is not just about producing millions of munitions and thousands of vehicles, ships, and planes today; it is also about the ability to scale up production as needed. In areas where technology is still developing—such as small drones—scalable capacity will be more relevant than stockpiles. In others—such as legacy munitions and high-consumption assets—a combination of stockpiles and rapid scalability will still be needed.

Creating this robust, sovereign defense supply chain—with a mix of defense-specific, dual-use, and convertible civilian facilities—presents a challenge for both government and industry. Public and private actors will need well-developed emergency plans that can rapidly switch off commercial production and turn on defense production, including through cross-sector mobilization. This manufacturing capability requires clear contracting models, designed by governments, to define who pays, how much, and how capacity is maintained during peacetime.

There is also an opportunity for industry to establish itself as a key partner to governments. By proactively engaging in this effort, industry can help shape the future defense ecosystem while ensuring its capabilities are fully utilized in times of need.

As industrial readiness improves, Europe’s next challenge is to build deeper collaboration and innovation networks to accelerate technological diffusion across the continent.

Governments could:

  • Map switchable production lines and identify their potential defense applications
  • Define clear contract frameworks to secure surge capacity and compensate for idling or dual-use capabilities
  • Commit to longer-term contracts, alongside clear, realistic ramp-up schedules, to incentivize up-front investment in critical capabilities

Industry could:

  • Collaborate with governments by sharing data on production capacities and proposing surge contingency plans and wartime operating models
  • Invest in readiness to strengthen the ability to secure surge contracts during crises by raising capital, retooling production lines, and ensuring workforce readiness
  • Expand into global export markets to allow external demand to sustain higher production rates—spreading fixed costs and stabilizing production chains