This summer, Americans have been distracted by a slate of major cultural and sporting events: the 250th anniversary of the United States, Taylor Swift’s high-profile wedding, and the men’s football World Cup. But beneath the fanfare, mounting economic pressures have been bubbling to the surface, culminating this week in a sobering milestone that has drawn alarm from policymakers and economists at home and abroad: America’s gross national debt has officially surpassed the $40 trillion mark.
Maya MacGuineas, president of the nonpartisan Committee for a Responsible Federal Budget, notes that the nation’s journey from zero to its first $1 trillion in debt stretched nearly 200 years, with that 1981 milestone prompting a public warning from then-President Ronald Reagan. In a televised address to the nation, Reagan framed the $1 trillion threshold as a critical wake-up call for fiscal responsibility. Today, 45 years later, the U.S. spends more than $1 trillion annually just on interest payments for its accumulated debt, a stark shift that underscores how rapidly federal borrowing has grown.
The $40 trillion threshold was widely anticipated by analysts, who trace the rapid expansion of the national debt back to consecutive spending surges under both the Donald Trump and Joe Biden administrations. Decades of ballooning costs for social safety net programs and other federal expenditures have outpaced government revenue, which has been eroded by successive rounds of major tax cuts. Large-scale emergency borrowing to respond to systemic crises, including the 2008 global financial crash and the 2020 COVID-19 pandemic, added trillions more to the national balance sheet. More recently, steep interest rate hikes implemented to tame post-pandemic inflation have drastically increased the cost of servicing existing debt, turning a gradual rise into an accelerating crisis.
When Trump first took office in 2016, the national debt stood just below $20 trillion, meaning the total has doubled in less than a decade. Data from the Congress Joint Economic Committee puts the current rate of growth at roughly $90,000 per second, or $7.8 billion per day.
Eric Swanson, an economics professor at the University of California, Irvine and former senior Federal Reserve economist, explains that today’s debt landscape is far more precarious than it was 10 years ago, largely due to the current interest rate environment. U.S. long-term interest rates are now at multi-decade highs, a shift driven in part by persistent inflation concerns and in part by investor anxiety over the unprecedented scale of federal government borrowing.
Competition for investor capital has also tightened: major technology firms are borrowing massive sums to fund artificial intelligence development, directly competing with the U.S. government for bond buyers. This has forced the Treasury to offer higher yields to attract investment, further increasing borrowing costs.
Wharton School economist and former global investment chief Mohamed A. El-Erian points out that higher interest rates make deficit funding exponentially more expensive. Year-over-year, federal interest payments on the national debt have risen 15%, and now account for nearly 20% of total federal tax revenue — a larger share than the entire U.S. defense budget.
The nation is also rapidly approaching the statutory $41.1 trillion debt ceiling, and the nonpartisan Congressional Budget Office projects total national debt will climb to roughly $64 trillion by 2036 if current spending and revenue patterns hold.
Despite the alarming numbers, economists emphasize the situation is not yet at a critical breaking point. As the world’s largest economy and with the U.S. dollar retaining its status as the global reserve currency, the U.S. has far more fiscal breathing room than other nations facing high debt levels, El-Erian says. Right now, he describes the moment as a flashing yellow warning light, not a flashing red crisis signal.
Swanson adds that other advanced economies currently carry higher debt-to-GDP ratios than the U.S. America’s current debt equals 126% of its annual gross domestic product, a share lower than G7 peers Japan and Italy. Even so, Swanson warns that investor appetite for U.S. government bonds is diminishing, creating a vicious cycle: the government must offer ever-higher yields to attract buyers, which in turn increases overall debt and servicing costs.
The ripple effects of America’s debt crisis do not stop at the U.S. border. Higher U.S. borrowing costs inevitably push up borrowing costs for governments, businesses and households across the globe. “What happens in the US never stays in the US,” El-Erian notes.
For American households, the impact will hit directly in the form of higher interest rates for mortgages, auto loans and credit card balances, with low-income households bearing the brunt of the burden. There is also a secondary inflationary effect: businesses pass their own higher borrowing costs on to consumers via elevated prices for goods and services. Ultimately, MacGuineas says, “the impact of the debt finds its way to the pocketbooks of people one way or another.”
Recent U.S. economic data shows growth has slowed in recent months but remains solid, a positive sign for fiscal stability. El-Erian explains that stronger economic growth generates higher tax revenue, which can cover government spending and interest payments, gradually easing the long-term debt burden if growth holds. If growth stalls, however, the U.S. will be forced to consider more difficult policy adjustments, including tax system reform, spending cuts, or in a worst-case scenario, debt restructuring.
So far, the federal government has relied on targeted financial engineering to calm bond markets: on Wednesday, the Treasury Department launched a debt buyback program intended to boost bond demand and push down long-term borrowing costs. The effect was short-lived, however, with long-term yields climbing back to recent highs just one day later.
With upcoming congressional midterm elections, the White House is under intense pressure to demonstrate progress on economic issues, with affordability ranking as the top concern for U.S. voters. Yet major structural reforms remain politically unappealing, and El-Erian says he is skeptical that policymakers will take meaningful action to address the deficit in the near term. “I don’t see anything happening that is going to significantly lower the deficit over the next two to three years,” he says. “If you look at the political talk, it’s about tax cuts.”