The IMF Integrates Permanent War Into Its Economic Forecasts
The International Monetary Fund is abandoning its models of perpetual peace. For the first time since 1945, the Washington-based institution has integrated a “prolonged conflict scenario” into its global economic forecasts, revising growth to 3.1% (-0.2 percentage points) for 2026. This methodological rupture reveals a global economy now structured by anticipation of conflict.
The Essentials
- The IMF revises its global growth forecasts to 3.1% (-0.2 percentage points) by integrating a prolonged conflict scenario
- Historical military booms increase public debt by 14 percentage points of GDP according to IMF analysis
- Low-income energy-importing countries suffer an asymmetric impact of an additional 2.3% of GDP
- Global military spending reaches a record 2,443 billion dollars in 2025, representing 2.6% of global GDP
A New Modeling That Breaks With 80 Years of Economic Doctrine
The April 2026 World Economic Outlook marks a historical turning point. The institution created in 1944 to stabilize the global economy now integrates war as a structural variable, abandoning the peace postulate that underpinned its analyses since Bretton Woods.
This methodological revolution rests on the analysis of 12 military booms occurring since 1870. Historical data reveals a relentless pattern: each prolonged conflict adds 14 percentage points of public debt to the GDP of belligerents, transforming budgetary arithmetic for generations.
The statistical exercise dissects the economic mechanisms of conflict. Beyond the 750,000 deaths and material destruction estimated at 1,200 billion dollars in Ukraine, the IMF quantifies the impact on global economic fundamentals. Energy inflation weighs 1.2 percentage points on European growth, while fragmentation of supply chains reduces overall productivity by 0.8 percentage points.
14 Points of Additional Debt: The Relentless Arithmetic of Conflict
The IMF’s historical analysis dissects the financial anatomy of military booms. From the Franco-Prussian War of 1870 to contemporary conflicts, each prolonged mobilization follows an identical trajectory: explosion of public spending, massive debt issuance, and lasting budgetary repercussions.
The mechanisms are now documented with precision. Global military spending reached 2,443 billion dollars in 2025, representing 2.6% of global GDP according to data from the Stockholm International Peace Research Institute. This 7.5% increase in one year reflects accelerated militarization transforming budgetary balances.
Europe illustrates this dynamic. Germany is raising its defense spending from 1.5% to 3% of GDP by 2027, representing 80 billion euros in additional annual spending. France maintains 2.1% of GDP in military spending, while Poland reaches 4.7%, a European record. This European arms race represents 340 billion euros cumulatively over three years, financed entirely through debt issuance.
Vulnerable Countries Pay the Asymmetric Bill
Western rearmament exports its costs to the most fragile economies. IMF analysis reveals a differentiated impact that disproportionately strikes low-income energy-importing countries. These economies suffer a shock of an additional 2.3% of GDP compared to developed countries, widening global inequalities.
This asymmetric bill operates through several channels. The rise in energy prices mechanically reduces the public budgets of net importers. Brent crude oil, stabilized around 95 dollars per barrel, maintains structural pressure on the finances of Sub-Saharan countries. Nigeria, Africa’s leading producer, sees its public revenues fall 15% despite elevated prices, a victim of the production decline caused by infrastructure sabotage.
The financial contagion effect exacerbates these imbalances. Capital migrates toward Western “safe havens,” causing net outflows of 180 billion dollars from emerging markets in 2025. Ghana, Sri Lanka, and Pakistan accumulate sovereign defaults, their bond spreads exceeding 1,500 basis points. This capital flight forces these countries into austerity policies that worsen their recessions.
Budgetary Crowding Out Sacrifices Social Investment
The budgetary equation of rearmament imposes cruel trade-offs. IMF analysis quantifies the crowding-out effect: each euro spent on armament reduces investment in education, health, and civil infrastructure by 0.7 euros. This substitution transforms the structure of public spending with lasting consequences for human development.
The British example illustrates this dynamic. The United Kingdom is raising its military spending from 2.3% to 2.8% of GDP, representing 12 billion pounds in additional spending. Meanwhile, the public health budget stagnates in real terms, constraining the NHS to reduce hospital investments by 8%. This budgetary reallocation translates into a lengthening of surgical waiting lists by 18% in two years.
France makes similar choices. The additional defense effort of 13 billion euros annually coincides with a freeze on university research investment credits and a 15% reduction in the development aid budget. These trade-offs reveal the priority accorded to security spending over productive investments.
This budgetary reorientation mortgages long-term growth. IMF models establish that one percentage point of GDP transferred from investment spending to military spending reduces potential growth by 0.3 percentage points over a decade. This arithmetic reveals the opportunity cost of militarization: less growth, less innovation, less shared prosperity.
Economic Fragmentation Redraws Commercial Flows
Beyond budgets, military geopolitics fragments the global economy. The IMF quantifies this “selective de-globalization” that restructures international exchanges according to geopolitical logic. Commercial flows between adversarial blocs have declined 12% since 2022, while intra-bloc trade intensifies.
This reconfiguration weighs on global productivity. The efficiency of global supply chains, built on 30 years of integration, is coming apart under security constraints. European companies are relocating 25% of their Chinese sourcing toward “friendly” suppliers, generating overcosts of 15% to 40% depending on sectors.
Technological innovation follows this bloc logic. R&D investments are polarizing geographically: Europe is investing 180 billion euros in its digital autonomy, the United States 280 billion in semiconductors, China 350 billion in artificial intelligence. This parallel race replaces scientific cooperation with technological competition, multiplying development costs.
Emerging Countries Navigate Between the Blocs
Facing this bipolarization, emerging countries develop costly balancing strategies. India maintains its Russian energy imports while strengthening its military ties with the United States, financing this dual allegiance through inflation of 6.2% that erodes the purchasing power of its middle class.
Southeast Asia illustrates this complex navigation. Vietnam attracts Chinese industrial relocations toward Europe while preserving its commercial ties with Beijing. This intermediary position generates 7.1% growth, but imposes infrastructure investments of 45 billion dollars to absorb production flows.
Brazil exemplifies the contradictions of this multipolarity. Brasília maintains its agricultural exports to China (60 billion dollars annually) while purchasing Swedish F-39 Gripen fighters for 8 billion dollars. This omnidirectional strategy preserves short-term growth but mortgages strategic autonomy.
The global economy is entering an era of durable fragmentation where geography trumps economic efficiency. This structural transformation, now integrated into IMF models, reveals the extent of the rupture: after 80 years of growth founded on commercial integration, humanity is relearning how to prosper in a divided world. The challenge for international institutions will be to preserve economic cooperation amid permanent military competition.