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Debt-to-GDP Ratio: Formula and What It Can Tell You

Definition
Debt-to-GDP ratio is a financial metric that compares a country's public debt to its gross domestic product, indicating the nation's ability to repay its debts.

What Is the Debt-to-GDP Ratio?

The debt-to-GDP ratio is a metric that compares a country's public debt to its 澳洲幸运5官方开奖结果体彩网:gross domestic product (GDP). It reliably indicates a country’s ability to pay back its debts by comparing what the country owes with what it produces. The debt-to-GDP ratio is often expressed as a percentage and it can also be interpreted as the number of years necessary to ൩pay back debt if GDP is dedicated entirely to debt repayment.

Key Takeaways

  • The debt-to-GDP ratio is the ratio of a country's public debt to its gross domestic product.
  • The ratio can also be interpreted as the number of years it would take to pay back debt if GDP was used for repayment.
  • The higher the debt-to-GDP ratio, the less likely it becomes that the country will pay back its debt and the higher its risk of default.
  • Default could cause a financial panic in the domestic and international markets.
Debt-to-GDP Ratio

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Formula and Calc🤡ulation of the Debt-to-GDP Ratio

The debt-to-GDP ratio can be calculated by this🌳 formula:

Debt to GDP = Total Debt of Country Total GDP of Country \begin{aligned} &\text{Debt to GDP} = \frac{ \text{Total Debt of Country} }{ \text{Total GDP of Country} } \\ \end{aligned} Debt to GDP=Total GDP of CountryTotal Debt of Country

A country that's able to continue paying interest on its debt without refinancing and without hampering economic growth is generally considered to be stable. A country with a high debt-to-GDP ratio typically has trouble paying off 澳洲幸运5官方开奖结果体彩网:external debts, also called public debts. These are any balances owed to outside lenders. Creditors are apt to seek higher interest rates when lending in such scenarios.

Important

Extravagantly high debt-t🐟o-GDP ratios may deter creditors✱ from lending money altogether.

What the Debt-to-GDP Ratio Can Tell You

It often triggers financial panic in domestic and international markets alike when a country defaults on its debt. The higher a country’s debt-to-GDP ratio climbs, the 𝓀higher its risk of defaﷺult generally becomes.

Governments strive to lower their debt-to-GDP ratios but this can be difficult to achieve during periods of unrest such as wartime or economic recession. Governments tend to increase borrowing to stimulate growth and boost aggregate demand in such challenging climates. This macroeconomic strategy is attributed to Keynesian economics.

Economists who adhere to 澳洲幸运5官方开奖结果体彩网:modern monetary theory (MMT) argue that sovereign nations capable of printing their own money can't ever go bankrupt because they can simply produce more fiat currency to service debts. This rule doesn't apply to countries that don't control their monetary policies, however, such as the 澳洲幸运5官方开奖结果体彩网:European Union (EU) nations that must rely on the 澳洲幸运5官方开奖结果体彩网:European Central Bank (ECB) to issue euros.

Good vs. Bad Debt-to-GDP Ratios

World Population Review has reported that countries whose debt-to-GDP ratios exceed 77% for prolonged periods experience significant slowdowns in economic growth. This can have a negative impact, as it can reduce a nation's annual real growth.

Fast Fact

The U.S. debt-to-GDP for Q3 2024 was 120.73%, almost double early 2008 levels but down from the all-time high of 132.81% seen in Q2 2020.

The U.S. has had a debt-to-GDP of more than 77% since Q1 2009. The U.S.’s highest debt-to-GDP ratio before that year was 106% in 1946 at the end of World War II.

Debt levels gradually fell from their post-World War II peak before plateauing between 31% and 40% in the 1970s. Ratios have steadily risen since 1980. They jumped sharply following 2007’s subprime housing crisis and the subsequent financial meltdown. Ratios then spiked during the COVID-19 pandemic to reach new highs and have only slightly come down since then.

Special Considerations

The U.S. government finances its debt by issuing Treasury securities which are widely considered to be the safest bonds on the market.

The countries and regions with the 10 largest holdings of 🎀U.S. Treasuries as of November 2024 (latest information) were:

  1. Japan: $1.10 trillion
  2. China, Mainland: $768.6 billion
  3. United Kingdom: $765.6 billion
  4. Luxembourg: $424.5 billion
  5. Cayman Islands: $397.0 billion
  6. Canada: $374.4 billion
  7. Belgium: $361.3 billion
  8. Ireland: $338.1 billion
  9. France $332.5 billion
  10. Switzerland $300.6 billion

What Is the Main Risk of a High Debt-to-GDP Ratio?

High debt-to-GDP ratios could be a k🐽ey indicator of increased default risk for a country. Country defaults can trigger financial repercussions globally.

How Does Modern Monetary Theory View National Debt?

Modern monetary theory suggests that sovereign countries don't have to rely on taxes or borrowing for spending because they can print as much as they need. Their budgets aren't constrained such is the case with regular households so their policies aren't shaped by fears of rising national debt.

Which Countries Have the Highest Debt-to-GDP Ratios?

Japan had the highest debt-to-GDP ratio of 248.7% as of 2025. Next is Sudan at 237.1%, followed by Singapore at 175.8%.

The Bottom Line

The debt-to-GDP ratio is a metric that helps understand a country's ability to pay back its debts. A lower debt-to-GDP ratio is generally ideal because it signals a country is producing more than it owes, placing it on a strong financial footing.

Article Sources
Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate. You can learn more about the standards we follow in producing accurate, unbiased content in our editorial policy.
  1. Congressional Budget Office. "."

  2. European Union. "."

  3. World Population Review. "."

  4. Federal Reserve Bank of St. Louis. "."

  5. TreasuryDirect. "."

  6. U.S. Department of the Treasury. "."

  7. International Monetary Fund. "."

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