U.S. National Debt Surpasses $40 Trillion, Doubling Since 2017

The federal government's debt crossed $40 trillion in mid-August, a threshold that arrived quietly but carries weight. On August 18, according to Treasury Department records, the nation's total debt reached $40.05 trillion—more than double what it was in 2017, just nine years earlier. The milestone reflects a simple, stubborn arithmetic: the government has been spending more money than it takes in, and the gap keeps widening.

The causes are layered and familiar to budget watchers. Tax cuts over the past two decades have reduced federal revenue. The aging American population has swelled the rolls of Social Security and Medicare, making those programs more expensive each year. The COVID-19 pandemic triggered massive emergency spending. And now, interest payments on the debt itself have become a fiscal weight of their own. In 2025, the government spent nearly $1 trillion just on interest—money that goes to bondholders rather than schools, infrastructure, or defense. That interest bill now consumes 14 percent of all federal spending, more than the government spends on national defense or on Medicare.

Michael Peterson, who leads the nonpartisan Peter G. Peterson Foundation, frames the problem as one of accumulated neglect. "We've been running deficits for the last 26 years, and we've basically ignored a lot of the structural challenges that exist in our budget that are very well known," he told CBS News. The longer the debt grows unchecked, the worse the compounding effect becomes. The Congressional Budget Office estimates that the Trump administration's tax and spending bill passed last year will add $4.2 trillion to the debt through 2034 alone. Peterson emphasizes that no single administration or Congress bears sole responsibility—many have made choices that pushed the debt higher.

Economists disagree on how much danger this poses. Dean Baker, co-founder of the Center for Economic and Policy Research, argues that a strong U.S. economy should be able to sustain the growing debt burden. He worries more about immediate threats like tariffs and international conflicts. Others sound alarms. Margaret Spellings, president of the Bipartisan Policy Center, warns that future shocks—a recession, artificial intelligence disruption, global conflict—could tip the nation from a manageable challenge into crisis. The Peterson Foundation projects the debt could reach $50 trillion within six years if spending and tax policies don't change.

For ordinary Americans, the debt's growth has tangible consequences. When the government borrows more, it must offer higher interest rates on Treasury bonds to attract investors. Those rates ripple outward: mortgage rates climb, car loans become more expensive, credit card rates rise. Peterson describes a second effect called "crowding out," where interest payments consume so much of the budget that funding for other programs gets squeezed, and pressure builds to raise taxes. About 80 percent of the national debt is held by the public—roughly two-thirds by domestic investors like mutual funds and the Federal Reserve, and the rest by foreign investors. If confidence in U.S. markets weakens, those foreign investors could withdraw their money, creating additional pressure.

The debt's trajectory is not bending downward. Spending continues to outpace revenue. Interest costs keep climbing. The structural drivers—an aging population, tax policy, military spending—show no signs of reversing without deliberate policy change. The question now is whether policymakers will address the underlying imbalances before the next economic shock arrives, or whether the nation will find itself managing a full crisis instead of a chronic problem.