The United States national debt has surpassed $40 trillion for the first time, according to Treasury Department data reported by the Associated Press. The figure, which tracks the total outstanding obligations of the federal government, crossed the threshold this week as Washington continues running annual deficits in the trillions of dollars.
The milestone arrives just over a year after the debt passed $37 trillion in mid-2025, underscoring how quickly the figure has climbed even as lawmakers from both parties have repeatedly pledged to rein in federal borrowing.
A Fast-Rising Number
The gross national debt includes both debt held by the public — Treasury bonds, bills and notes owned by investors, foreign governments and the Federal Reserve — and intragovernmental debt owed to programs like Social Security. Debt held by the public alone now stands at roughly $29 trillion, a figure economists watch closely because it reflects borrowing that must be financed through the open market.
The pace of accumulation has accelerated in recent years. The debt took more than two centuries to reach $10 trillion, but has added tens of trillions more in just the past two decades, fueled by the 2008 financial crisis response, pandemic-era spending, tax cuts, and now sharply higher interest rates on existing debt.
Interest Costs Squeeze the Budget
One of the most significant drivers of the debt’s growth is the cost of servicing it. As the Federal Reserve held interest rates elevated to combat inflation earlier this decade, the government has had to refinance maturing debt at much higher rates than in the previous decade of near-zero borrowing costs.
Net interest payments on the debt have climbed past $1 trillion annually, a sum that now exceeds what the federal government spends on national defense. The Congressional Budget Office has repeatedly flagged this trend as unsustainable over the long term, warning that rising interest costs could eventually crowd out spending on other priorities or force further borrowing simply to cover interest already accrued.
Analysts note that the debt-to-GDP ratio, a common measure of a country’s ability to manage its obligations, has climbed above 120 percent — among the highest levels in US history outside of the immediate aftermath of World War II.
Political Response and the Debt Ceiling
The debt has grown despite periodic clashes in Congress over the statutory debt ceiling, the legal cap on how much the Treasury can borrow. Lawmakers suspended or raised the ceiling in 2025 to avoid a default, a step that has become a recurring, high-stakes ritual in Washington roughly once every one to two years.
Both parties have contributed to the growth in borrowing, through a combination of tax legislation, emergency spending, and entitlement programs that continue to expand as the US population ages. Deficit hawks in both parties have called for spending cuts or revenue increases, but neither Democrats nor Republicans have advanced a comprehensive plan capable of stabilizing the debt’s trajectory, in part because doing so would require politically unpopular changes to popular programs like Social Security and Medicare, or significant tax increases.
Federal Reserve officials and Treasury leadership have generally avoided direct commentary on fiscal policy, which falls under Congress’s purview, but have acknowledged that sustained high borrowing costs make debt management more difficult for policymakers going forward.
What It Means for Americans
For most households, the $40 trillion figure is abstract, but economists say its effects are increasingly tangible. Elevated government borrowing can put upward pressure on long-term interest rates, affecting everything from mortgage rates to auto loans and business financing. It also limits the fiscal flexibility available to respond to future recessions, wars, or public health emergencies without adding even more to the debt load.
Some economists argue the US retains significant capacity to borrow given the dollar’s status as the world’s reserve currency and continued global demand for Treasury securities. Others warn that confidence in US fiscal management is not unlimited, pointing to periodic volatility in bond markets and warnings from credit rating agencies in recent years about the sustainability of US finances.
The debt discussion also echoes broader concerns raised across the private sector, where tech giants have taken on roughly $1.65 trillion in debt to fund the AI buildout, prompting comparisons to earlier eras of aggressive off-balance-sheet financing.
Looking Ahead
With no major deficit-reduction package currently advancing in Congress, budget analysts expect the debt to continue climbing well past $40 trillion in the coming years. The Congressional Budget Office’s long-term projections show deficits remaining elevated for the foreseeable future absent significant policy changes, driven largely by mandatory spending programs and interest costs rather than discretionary spending, which makes up a shrinking share of the federal budget.
The full Associated Press report on the milestone is available at apnews.com.
