NATO's 5 Percent Pivot: Europe's Defence Spending Surge and the Road to Ankara

As NATO's 32 member states prepare for the alliance's July 2026 summit in Ankara, the European security architecture is navigating the most consequential fiscal and strategic transformation since the end of the Cold War. The numbers tell a story of unprecedented acceleration: NATO's March 26 annual report confirmed that European allies and Canada increased defence spending by 20 percent in 2025 alone, pushing combined allied defence expenditure above $1.5 trillion for the first time. Every single ally now exceeds the previous 2 percent of GDP benchmark agreed at the 2014 Wales Summit — a threshold that only seven members met as recently as 2021. Yet the scale of what lies ahead makes even this historic surge look modest.

At the heart of the transformation is the 5 percent commitment adopted at the 2025 Hague Summit, formally endorsed at the February 2026 NATO defence ministers' meeting in Brussels, and codified with a 2035 implementation deadline. The framework distinguishes between 3.5 percent for core defence capabilities — hardware, readiness, and operations — and 1.5 percent for defence-relevant infrastructure including cybersecurity, civil resilience, and dual-use transport networks. This dual structure was a political concession designed to make the target achievable on paper, but its practical implications are staggering. The McKinsey Global Institute estimates that meeting the 3.5 percent core spending benchmark alone would lift European defence spending toward €800 billion annually by the end of the decade, a figure that would fundamentally reorder the fiscal priorities of every major European economy.

The political urgency behind this transformation was sharpened dramatically on May 6, when Polish Defence Minister Wladyslaw Kosiniak-Kamysz issued a direct challenge from Warsaw. Speaking at the Defence 24 Days conference, he called for accelerating the 5 percent target from 2035 to 2030, warning that "later may be too late." Poland, which borders both Russia and Ukraine, has positioned itself as NATO's foremost advocate for rapid rearmament. Warsaw plans to spend 4.8 percent of GDP on defence in 2026 — the highest proportion in the alliance — and its argument carries weight among eastern flank allies who view the 2035 timeline as dangerously leisurely given the pace of Russian military reconstitution.

Germany's fiscal response illustrates both the ambition and the structural constraints of European rearmament. Berlin's 2026 defence budget reaches approximately €83 billion in regular appropriations, supplemented by a €25.5 billion one-off "Zeitenwende" special fund — yielding a total of roughly €108.2 billion, a 32 percent increase over 2025 levels. This represents the largest single-year expansion of German military expenditure in the post-war era. The Bundestag achieved this through the politically fraught suspension of the Schuldenbremse, the constitutional debt brake that caps annual structural federal borrowing at 0.35 percent of GDP, creating a €500 billion defence and infrastructure fund in February 2025. Yet reaching the full 5 percent target would require Germany to spend approximately €210 billion annually — an increase of roughly €120 billion per year, equivalent to 30 percent of the nation's entire healthcare budget. The political architecture that enabled the Zeitenwende fund's creation, achieved via a two-thirds majority in a lame-duck parliamentary session, may not be replicable for recurring annual increases of this magnitude.

The fiscal mathematics are even more severe in Southern Europe. Italy, with a sovereign debt burden of 137 percent of GDP and 10-year bond yields hovering around 3.8 percent under the European Central Bank's ongoing quantitative tightening, would need to find an additional €70 billion annually to reach the 5 percent target. With a VAT rate already at 22 percent, income tax topping out at 43 percent, and social security contributions consuming roughly 33 percent of payroll, the conventional revenue-raising toolkit is effectively exhausted. Pension expenditures at 15.4 percent of GDP — the highest in the EU — represent the only large pool of potentially redirectable spending, but Italy's political system, which has produced 68 governments since 1946, is structurally optimised to preserve welfare entitlements rather than reallocate them. France faces its own constraints, with a 2024 fiscal deficit of 6.1 percent of GDP already placing it under the EU's Excessive Deficit Procedure; adding the €75 billion required for the 5 percent target would push the deficit toward 9 percent, a level that would test the credibility of European fiscal governance.

A notable milestone in the spending data offers a different perspective on burden-sharing. For the first time in recorded NATO history, a European ally — Norway — has surpassed the United States in defence spending per capita, according to the Atlantic Council's Transatlantic Security Initiative tracker. The Norwegian achievement, driven by Oslo's decision to direct substantial sovereign wealth fund revenues toward military modernisation, provides a counter-narrative to longstanding transatlantic grievances about European free-riding. Combined with Poland's 4.8 percent commitment and the Baltic states' sustained high spending ratios, the data suggests a European alliance that — however unevenly — is moving decisively toward greater financial responsibility for its own defence.

Parallel to the NATO spending trajectory, the institutional architecture of European defence cooperation is evolving along a separate but complementary track. The EU-UK Security and Defence Partnership, concluded at the first EU-UK Summit on May 19, 2025, has moved into the implementation phase under the Labour government of Prime Minister Keir Starmer. Armed Forces Minister Luke Pollard confirmed in parliamentary testimony that the Defence Secretary has held discussions with European Commissioner for Defence and Space Andrius Kubilius, while the Foreign Secretary has engaged with EU High Representative Kaja Kallas. The partnership covers an expansive agenda: peacebuilding, Common Security and Defence Policy crisis management, maritime and space security, cyber operations, counter-hybrid warfare, and the external dimensions of economic security. Critically, however, the UK government has maintained its "NATO First" defence policy and declined to join the EU's SAFE defence fund — a decision analysed in depth by Chatham House as a setback for the UK-EU reset that nonetheless has not "hit a brick wall." The upcoming EU Foreign Affairs Council on May 18, 2026, which will address the future of EU external action in light of geopolitical developments, may provide further clarity on the institutional relationship.

The EU's ReArm Europe plan, a €800 billion framework proposed by the European Commission in April 2025 and agreed between the Council and Parliament in November 2025, provides the Union-level counterpart to NATO's spending targets. The plan incentivises defence-related investments within the current EU budget and aims to achieve European defence readiness by 2030. Yet the relationship between the EU's efforts and NATO's targets raises unresolved questions about duplication and coherence. Ministers in both London and Brussels have been careful to frame their bilateral cooperation as complementary to NATO's primacy in collective defence, but the proliferation of parallel frameworks — NATO's 5 percent, the EU's ReArm Europe, the European Defence Industrial Programme, and bilateral partnerships with the UK — creates coordination challenges that the Ankara summit will need to address.

The Ankara summit itself, scheduled for July 2026 against a backdrop of ongoing transatlantic turbulence over Iran, Greenland, and burden-sharing disputes, will test whether the alliance can translate financial commitments into credible military capability. The NATO common funded budgets for 2026 — €528.2 million for the Civil Budget and €2.42 billion for the Military Budget — represent the institutional backbone of collective defence, but they are dwarfed by national expenditures. The real measure of success in Ankara will not be whether allies reiterate the 5 percent pledge, but whether they present credible national implementation plans backed by procurement contracts, industrial capacity investments, and force structure reforms. The Atlantic Council's tracker notes that "defence spending and the scaling up of industry remain shared values" on both sides of the Atlantic, and these will likely "take centre stage to demonstrate allied unity." In an alliance where unity has become a strategic commodity in its own right, the numbers may matter less than the narrative they support — and less still than the military reality they ultimately produce.