Eric SwansonMaya MacGuineasJoe BidenMohamed A. El-ErianDonald TrumpRonald ReaganFederal ReserveCongressional Budget OfficeUniversity of CaliforniaCongress Joint Economic CommitteeCommittee for a Responsible Federal BudgetWharton School

US national debt surpasses $40tn as nation nears $41.1tn debt ceiling; CBO forecasts climb to $64tn by 2036

The US national debt has surpassed $40 trillion, raising alarms as the nation approaches a $41.1 trillion debt ceiling. The Congressional Budget Office forecasts the debt could reach $64 trillion by 2036, driven by increased public spending under both the Trump and Biden administrations.

BBC BBC21 August 2026 · 01:07 UTC
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The US national debt has reached a staggering $40 trillion, a milestone that has raised significant concerns domestically and internationally.

According to the Congressional Budget Office, the debt is projected to climb to approximately $64 trillion by 2036, driven by increased public spending under both the Trump and Biden administrations.2

It took almost 200 years for America's national debt to reach $1 trillion for the first time, highlighting the rapid acceleration of borrowing in recent years.

At the beginning of Trump's first presidential term in 2016, the national debt was just under $20 trillion, effectively doubling in the last decade.

The debt is currently rising at an alarming rate of about $90,000 every second, or $7.8 billion a day, according to the Congress Joint Economic Committee.

Interest payments on government debt have surged, now accounting for almost 20% of tax revenue, which is larger than defense spending, as noted by economist Mohamed A. El-Erian.6

He warns that long-term interest rates in the US are at multi-decade highs, driven by inflation concerns and extreme levels of government borrowing.4

The diminishing investor appetite for US government bonds is creating a “vicious” cycle, requiring the government to offer higher returns to attract buyers.5

In response, the Treasury Department has attempted financial engineering by buying back government debt to boost demand, but the effects have been short-lived, with long-term borrowing costs rebounding quickly.

Key Insight
“Long-term interest rates are at multi-decade highs, partly due to inflation and extreme government borrowing, making deficit funding more expensive, says economist Eric Swanson. Investor appetite for US bonds is "diminishing," creating a "vicious" cycle, and a Treasury buyback had only a short-lived impact.”
US national debt hits $40 trillion: Here's the impact to average Americans
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US national debt hits $40 trillion: Here's the impact to average Americans
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“This week they hit the headlines when US national debt passed the $40tn mark, raising concerns both at home and abroad.”
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