IMF's Warning on Global Government Debt: A Ticking Time Bomb?

In its October 2025 Fiscal Monitor, the International Monetary Fund (IMF) issued a stark alert on the ever escalating global public debt, with a projection that it will surpass 100% of global GDP by 2029—the highest level since 1948. This warning comes at a time of rapid capital borrowing, with governments worldwide now owing nearly $100 trillion, nearly double the $51 trillion only a decade ago in 2015.

The surge, was partially fuelled by post-pandemic stimulus, energy shocks, and geopolitical tensions, risks amplifying financial instability if unchecked. Vitor Gaspar, IMF’s Fiscal Affairs Director, emphasized: “In the fiscal monitor, we project global public debt to go above 100% of GDP by 2029. Public debt risks are widespread and tilted towards debt accumulating even faster. Policymakers must act now to keep debt under control and contain debt risks.”

Current Debt Landscape

Global public debt hit $97.5 trillion in 2024 (99% of GDP), up from 84% in 2015, according to IMF data. Advanced economies like the US are sitting with a remarkable 122% debt-to-GDP ratio with Japan holding a frightening 255% debt-to-GDP ratio. In emerging markets the likes of Argentina at 110% face acute distress risks. Low-income countries owe $1.2 trillion, with 60% at high risk of default. Interest payments alone consume $2 trillion annually, a number above that spent on education or health spending in many nations.

Projections to 2029

Under baseline scenarios, debt is set to climb to 105% of GDP by 2029, but downside risks could see this rise to as high as 123% if global growth falters or interest rates stay elevated. Emerging markets may see and average 65% debt-to-GDP (up from 58%), with the Likes of South Africa already sitting at 75%. Projections show advanced economies are likely to stabilise around 120%. For the UK, it’s forecasted to peak at 105.9% before easing slightly to 105.4% in 2030.

Key Risks Highlighted

The IMF warns of a “vicious cycle” where high debt erodes investor confidence, spiking borrowing costs, and triggering a widespread financial crises, particularly in a high-rate environment (global rates are up on average 200-300 basis points since 2022). Emerging markets, currently holding around 30% of debt but facing 50% of risks, are the most vulnerable to defaults with a staggering $7 trillion in maturing bonds by 2026. Gaspar noted: “After years of rising debt and falling interest rates, the environment has changed dramatically. Interest rates have increased; financial asset valuations have stretched. The greatest concern is financial turmoil, driven by fiscal-financial feedback loops.” Broader threats include AI-driven inequality, and geopolitical fragmentation, potentially shaving 1-2% off global growth.

Policy Recommendations

Urging immediate action, particularly to higher debt and at risk nations, the IMF calls for the establishment of “fiscal buffers” via spending cuts, tax reforms, and growth-enhancing investments. Gaspar advised: “Fiscal policy should ensure debt sustainability and create buffers against future adverse shocks and heightened uncertainty. While the political challenges are significant, the solutions lie in improving growth prospects and strengthening trust in the government. Better governance and institutions are key.” Priorities include:

• Revenue Mobilization: Nations should look to broaden tax bases to raise 2-3% of GDP.
• Expenditure Efficiency: Target subsidies (e.g., fossil fuels costing $1T/year) and pension reforms as well as reigning in wasteful and fraudulent budget lapses and high government salaries
• Debt Management: Nations should extend bond maturities, swap for green bonds or refinance existing funding; low-income nations will need and additional $500B in concessional aid.
• Global Coordination: Revamp debt architecture via a G20 Common Framework to handle restructurings faster.

The IMF stresses this “now is the time” window, as delays could mirror a similar crises seen in 2008, but one on steroids. For full report, see IMF’s Fiscal Monitor database.