The Trade-Off Between Rising Debt and Defense Spending
Geopolitical tensions, from the conflict in the Middle East and the ongoing war in Ukraine to security challenges in the Asia-Pacific and Latin America have strengthened the investment case for the global defense sector. Yet in many advanced economies, high public debt levels are raising questions about how quickly and how far defense budgets can realistically expand.
While ambitious spending proposals signal a potential multiyear uptrend, concerns over fiscal sustainability could moderate the pace of growth. This tension between security needs and debt constraints lies at the center of the current debate.
Record proposals in the United States
The United States remains the world’s largest defense spender. For fiscal year 2026, the baseline defense budget stands at approximately $1 trillion, already at record levels. Proposals for fiscal year 2027 call for a substantial increase, potentially reaching $1.5 trillion, representing nearly a 50% rise from current levels. This figure does not yet include expected supplemental requests tied to ongoing operations in the Middle East.
The proposed budget shifts emphasis toward domestic priorities, including advanced missile defense systems, space capabilities, shipbuilding programs, troop pay increases of 5–7%, artificial intelligence integration and nuclear modernization. While a Republican-controlled Congress might traditionally support stronger defense funding, the sheer scale of the request competes directly with efforts to reduce the national debt.
With the US debt-to-GDP ratio exceeding 120%, and global bond markets increasingly sensitive to fiscal discipline, lawmakers face difficult choices, particularly in a midterm election year. Even a compromise version of the proposal would likely still accelerate procurement, research and modernization spending compared with recent years.
Europe’s more gradual rearmament
In Europe, the shift toward higher defense spending stems from a strategic reassessment following years of underinvestment and the shock of the war in Ukraine. Unlike the mature US defense industrial base, many European countries are focused on rebuilding capacity in munitions, maintenance, logistics and systems integration.
NATO’s push for higher contributions has added urgency, but uneven industrial capabilities across the region have slowed implementation. Germany provides a notable example: in 2025, it increased military spending by 20–25% through both regular budgets and special funds. This move pushed Germany to its largest public-sector deficit since reunification, despite a relatively moderate debt-to-GDP ratio of around 64%, well below the G7 average.
The European story may unfold more slowly than in the US, but it could prove more sustainable over time as countries gradually expand production capacity and address long-standing capability gaps.
Japan’s balancing challenge
Japan illustrates the tension clearly. Facing its own high debt burden (debt-to-GDP near 237%), an aging population, and reliance on imported energy, the country has still approved a record defense budget for 2026 of approximately 9 trillion yen (around $58 billion), marking a 10% increase. The spending aims to strengthen maritime security and deterrence capabilities amid regional tensions.
Even with broad political support for reaching a 2% of GDP defense target, economic and demographic constraints limit how aggressively Japan can move.
Global outlook and sector dynamics
Worldwide defense spending is projected to grow at a compound annual rate of around 5% through 2030, with company earnings in the sector potentially expanding in double digits following an average of 8% annual growth over the past decade. Large order backlogs at major manufacturers, reflected in elevated book-to-bill ratios, are supporting revenue visibility and contributing to strong stock performance in the sector.
For instance, leading European defense firms have seen valuations rise significantly as governments commit to multiyear procurement programs, even surpassing some high-profile technology names in certain valuation metrics over the past year.
The core trade-off
The defense sector stands to benefit from sustained geopolitical uncertainty and a broad rearmament trend led by the United States. However, in an environment of elevated public debt across advanced economies, actual spending increases may face scrutiny and moderation. A scaled-back but still meaningful acceleration in procurement and investment remains the most probable outcome in both the US and Europe.
Investors continue to monitor whether fiscal reality will temper ambitious proposals or whether security priorities will ultimately take precedence. The sector’s long-term trajectory appears supported by structural demand, but the pace will likely depend on how governments navigate the competing pressures of debt sustainability and national security.
Important notes:
This article is for informational purposes only and does not constitute investment advice. Budget proposals, geopolitical developments, and fiscal policies can change rapidly. The value of investments can fall as well as rise, and past performance is not a reliable guide to future results.