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IMF projects global debt at 100% of GDP by 2029 and warns of direct impact on growth, public spending, and crisis response capacity.
On 15 April 2026, the International Monetary Fund (IMF) published a new edition of the Fiscal Monitor, a document that assesses the fiscal health of countries and global trends in public indebtedness. According to the report released in Washington, United States, and reported by outlets such as Reuters (April 2025) and updated international economic analyses in 2026, the global public debt could reach around 100% of the world’s Gross Domestic Product (GDP) by 2029, an extremely high and rare level in modern economic history. This level of indebtedness is comparable to that observed in the period immediately after World War II, when countries devastated by the conflict accumulated massive debts for the reconstruction of infrastructure, economies, and social systems. The main difference, according to the IMF, is that the current scenario does not involve a direct global war, but rather a combination of structural and prolonged factors that have been putting pressure on public accounts worldwide.
The warning from the international organization is clear: the continuous rise of public debt could drastically reduce governments’ ability to invest, grow, and respond to new crises, creating an environment of prolonged economic fragility.
IMF projections show accelerated trajectory of global debt until 2029
The data presented by the IMF indicates a consistent trajectory of increasing global indebtedness over the decade:
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In 2024, global public debt was estimated at approximately 92% of the world’s GDP. By 2025, this number would already rise to around 94%, reflecting high spending and moderate economic growth. The projection for 2029 points to a leap to the symbolic mark of 100% of global GDP, consolidating a scenario of high fiscal pressure.
This growth does not occur in isolation or abruptly. It is the result of a set of factors accumulated over the past few years, including:
- Fiscal impacts of the COVID-19 pandemic
- Increased military spending in response to geopolitical tensions
- Rising global interest rates after inflationary cycles
- Demographic pressures, especially in developed countries
- Growing need for investments in energy transition
What makes the scenario more concerning is that this increase occurs in an environment of higher interest rates, which raises the cost of debt and accelerates its impact on public budgets.
Comparison with the post-World War II period reveals the seriousness of the global fiscal scenario
The historical reference made by the IMF to the post-World War II period is not symbolic, but technical. After 1945, countries like the United States, the United Kingdom, and various European economies had public debt levels exceeding 100% of GDP, a direct result of the war effort.
At that time, however, there were specific conditions that facilitated the reduction of this debt over time:
- Accelerated economic growth in the post-war period
- Massive industrial expansion
- Population growth
- Low financing costs in some periods
In the current scenario, these conditions do not repeat with the same intensity. Global growth is more moderate, the population is aging in various regions, and interest rates are at higher levels, making the process of fiscal adjustment much more complex.
This means that reaching 100% of GDP in debt today may have more lasting consequences than in the past, precisely due to the absence of factors that historically helped in reducing this indebtedness.
High interest rates increase risk and pressure public budgets around the world
One of the central points of the IMF’s warning is the relationship between debt and interest rates. When interest rates rise, the cost of maintaining the debt also increases, creating a direct effect on public spending.
In technical terms, this means that an increasing share of countries’ budgets is allocated to paying interest, reducing resources available for other essential areas, such as:
- Infrastructure
- Health
- Education
- Social programs
- Productive investments
This phenomenon is known as crowding out effect, in which debt service “crowds out” other spending from the budget. The higher the debt and the higher the cost of interest, the lower the maneuvering room for governments, creating an increasingly restricted fiscal environment.
Crisis response capacity may be compromised in a high indebtedness scenario
Another critical point highlighted by the IMF is the reduction in countries’ ability to respond to new crises. During the COVID-19 pandemic, governments around the world were able to aggressively increase spending to support economies, finance healthcare systems, and protect jobs.
However, this type of response directly depends on fiscal space. In a scenario of high debt, this capacity is compromised.
This means that future crises — whether health, climate, financial, or geopolitical — may find governments with less capacity to react, increasing the economic and social impact of these events.
Moreover, highly indebted countries may face greater difficulty accessing credit in critical moments, especially if there is a loss of confidence from the markets.
Economic growth may be affected by high levels of public debt
The IMF also highlights that high levels of public debt tend to impact economic growth indirectly, but consistently.
This occurs through several mechanisms:
First, governments with high debt have less capacity to invest in areas that stimulate growth, such as infrastructure and innovation. Second, the need for fiscal adjustments may lead to tax increases or spending cuts, reducing economic activity.
Third, the increase in fiscal risk can raise financing costs not only for governments but also for businesses and consumers.
The result is a slower economic environment, with less dynamism and lower capacity for wealth generation, which in turn makes it even more difficult to reduce the debt itself.
Structural factors like population aging increase global fiscal pressure
In addition to cyclical factors, the IMF points to structural pressures that tend to keep debt on an upward trajectory.
One of the main factors is population aging, especially in advanced economies. With more elderly people and fewer people of working age, the demand for:
- Pension
- Public health
- Social assistance
At the same time, the revenue base tends to grow more slowly, creating a structural imbalance in public accounts. Another relevant factor is the need for investments in energy transition and climate adaptation, which require significant volumes of public and private resources.
These structural pressures indicate that the debt problem is not just temporary, but part of a deeper transformation of global economies.
Emerging countries face additional risks with increase in global debt
Although the phenomenon of high debt is global, its effects may be more intense in emerging countries. This is because these economies generally exhibit:
- Greater dependence on external capital
- More volatile currencies
- Weaker fiscal structures
In scenarios of high global debt and high interest rates, investors tend to seek safer assets, which can lead to capital outflows from emerging countries. This movement puts pressure on local currencies, increases the cost of external debt, and can generate economic instability.
For these countries, the IMF’s warning carries even more weight, as it combines fiscal risks with financial vulnerabilities.
IMF points to need for gradual fiscal adjustment and structural reforms
In light of this scenario, the IMF recommends that countries adopt fiscal adjustment strategies gradually, avoiding abrupt measures that could harm economic growth. Among the main recommendations are:
- Improvement of public spending efficiency
- Expansion of the revenue base without excessive distortions
- Structural reforms to increase productivity
- Strengthening of fiscal rules
The central idea is to balance the need for debt control with the maintenance of economic growth. The challenge is to find this balance without compromising social and economic stability, especially in a global scenario already marked by uncertainties.
In light of this scenario, is the world heading towards a new era of fiscal restriction?
The IMF’s warning highlights a central question for the coming years: the world may be entering a new phase of greater fiscal restriction, in which governments will have less room to expand spending and respond to shocks.
This scenario does not necessarily indicate an imminent crisis, but it points to a structural change in the global economic environment. The combination of high debt, higher interest rates, and moderate growth creates a context in which fiscal decisions become more complex and strategic, with a direct impact on the future of economies.
In light of this picture, the discussion about public debt ceases to be a technical topic restricted to economists and begins to have direct implications for the daily lives of populations around the world.
Now, the question that remains is clear and inevitable: in the face of a global scenario of rising debt and limited fiscal space, how will countries balance growth, stability, and crisis response capacity in the coming years?
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