The $40 trillion milestone is a striking measure of how quickly federal borrowing has accumulated through recessions, wars, tax policy and emergency spending. Comparing administrations adds useful context, but it does not assign every new dollar of debt to one president.
The U.S. gross national debt has reached approximately $40 trillion—about $40.05 trillion—more than double the $19.95 trillion recorded when Donald Trump entered office in January 2017. The new milestone puts a sharp focus on how the debt grew under Trump, Joe Biden and Barack Obama, and on the limits of treating the running total as a simple presidential scorecard.
Across those administrations, borrowing rose for different reasons: economic downturns, pandemic relief, tax changes, wars, spending commitments and the growing cost of interest. The comparison matters now because debt at this scale affects future budgets even when the political argument centers on the past.
What the $40 trillion figure measures
The headline number is gross federal debt, or total public debt outstanding. It includes money owed to investors as well as intragovernmental holdings—Treasury securities held by federal accounts and trust funds.
According to Treasury data cited in the report, roughly $32.27 trillion was held by investors and about $7.78 trillion represented intragovernmental holdings. Those are different claims on the federal government, but both are included in the gross-debt total.
That distinction matters in political debates. Debt held by the public is often used for comparisons with the size of the economy because it reflects borrowing from outside investors, including households, institutions, foreign holders and the Federal Reserve. Gross debt is the broader figure that has now crossed $40 trillion.
Neither measure means taxpayers receive a bill for the full amount at once. But the government must refinance maturing obligations and make interest payments while paying for programs such as Social Security, Medicare, Medicaid, defense and other federal operations.
Trump’s two terms add up
The report estimates that the national debt increased by about $11.6 trillion across Donald Trump’s two nonconsecutive terms. That total includes roughly $7.8 trillion during his first term and about $3.84 trillion since he returned to office in January 2025.
Trump’s first term included the COVID-19 pandemic, when Congress approved large relief measures as businesses closed, unemployment surged and the federal government sought to cushion the economic shock. Revenue losses and emergency spending both widened deficits.
Supporters of Trump often point to the extraordinary nature of the pandemic and the bipartisan votes behind major relief bills. Critics point to tax reductions, spending choices and the fact that debt was rising before the pandemic arrived. Both points are relevant: presidents propose budgets and sign legislation, but Congress writes spending and tax laws, while economic conditions can quickly change the fiscal picture.
The recent increase during Trump’s second term is also not directly comparable with a completed four- or eight-year presidency. It is a snapshot from an administration still in progress, not a final total.
Biden had the largest four-year rise
Joe Biden presided over an estimated $8.45 trillion increase in gross debt over four years, the largest four-year dollar gain among the presidents highlighted in the comparison. The debt rose as the country moved beyond the most acute phase of the pandemic but continued to face high federal outlays, changing tax receipts and higher borrowing costs.
In percentage terms, the increase under Biden was about 30.5 percent. That was substantial, but lower than the percentage increases recorded during George W. Bush’s presidency, Barack Obama’s presidency and Trump’s first term.
This is why the dollar comparison can be misleading without a starting point. Adding several trillion dollars to a much larger debt base can produce a lower percentage increase than adding fewer dollars when the starting debt is smaller.
Biden’s defenders argue that his administration inherited pandemic-era fiscal conditions and that legislation supported infrastructure, clean-energy investment and domestic manufacturing. Critics argue that spending added pressure to already-large deficits and that Washington failed to adjust quickly enough as emergency conditions eased. The debt figures capture the balance, not a settled judgment on those competing claims.
Obama’s years began in crisis
Barack Obama’s eight years saw gross debt rise by approximately $9.32 trillion, or about 87.7 percent, according to the comparison. The increase was the largest across a full two-term presidency among the administrations examined.
Obama entered office in the aftermath of the 2007-2009 financial crisis, with unemployment high, tax revenue weakened and major efforts underway to stabilize the economy and financial system. The calendar also complicates clean handoffs: federal fiscal years do not begin and end on Inauguration Day, and policies approved under one administration can affect borrowing under the next.
During Obama’s first term, debt rose from roughly $10.63 trillion to $16.43 trillion, an increase of about $5.81 trillion. It increased by another roughly $3.51 trillion in his second term.
Obama’s record is often cited by critics as evidence of runaway borrowing. Supporters counter that recession response, automatic safety-net spending and reduced revenue were central to the early surge, while the pace of growth slowed in his second term. The underlying lesson is that a debt total reflects economic conditions as well as policy choices.
Dollar totals are not blame totals
A president’s time in office provides a useful timeline, but it is not a complete explanation for the debt. Congress controls appropriations and tax legislation. Long-standing benefit formulas, military commitments, recessions, financial rescues and natural or public-health emergencies can all change the borrowing path.
George W. Bush’s presidency illustrates that broader pattern. Gross debt rose from about $5.73 trillion to $10.63 trillion, an increase of roughly $4.9 trillion, as the United States fought wars in Afghanistan and Iraq, enacted tax cuts and entered the financial crisis. In percentage terms, debt increased about 85.5 percent.
The same caution applies to all three more recent presidents. Assigning every dollar to the person in the Oval Office overlooks decisions made by multiple Congresses and the delayed effects of earlier legislation. At the same time, presidents influence the outcome through budget priorities, negotiations, vetoes, appointments and their willingness to accept or challenge fiscal compromises.
- Dollar change shows how much was added during an administration.
- Percentage change shows the increase relative to the debt inherited.
- Debt held by the public is generally the more useful measure for judging debt against the economy.
- Gross debt is the broader total that has passed $40 trillion.
Interest costs raise the stakes
The more immediate pressure is not the entire debt stock but the cost of carrying it. Treasury figures cited in the report put federal interest costs at nearly $1.2 trillion during fiscal year 2026, placing interest among the government’s largest spending categories.
When interest costs rise, lawmakers have less room to fund other priorities without raising revenue, cutting spending or borrowing more. Higher rates can make the problem harder because newly issued debt and refinanced debt may carry more expensive interest payments than bonds issued in the low-rate years.
The Congressional Budget Office projects that debt held by the public will rise from about 101 percent of gross domestic product in 2026 to 120 percent by 2036. Forecasts can change with economic growth, inflation, tax receipts, spending decisions and interest rates, but the direction of the projection underscores why the $40 trillion milestone is not merely symbolic.
The comparison between Trump, Biden and Obama settles little by itself. It does show that large debt increases have continued through Republican and Democratic administrations alike—and that the harder argument ahead is whether Washington can narrow future deficits after the crises that helped make them so large have passed.
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