U.S. government borrowing costs have climbed to their highest levels in decades, reigniting anxieties that the nation’s expanding debt burden could precipitate a fiscal crisis. The benchmark 10-year Treasury yield has firmly breached the 5% threshold, while net interest costs are estimated to reach approximately $1.05 trillion over the first 11 months of fiscal year 2026.
Maya MacGuineas, president of the Committee for a Responsible Federal Budget, highlighted the danger of a self-reinforcing cycle where mounting interest expenses compel the government to borrow more, which in turn drives rates higher. “The real threat is the debt spiral,” MacGuineas stated last month. “If interest begets debt, and debt begets interest, eventually debt will spin out of control. A fiscal crisis, once unthinkable, is now a distinct possibility.”
However, several strategists argue that the U.S. is far from a breaking point. TD Securities economists Gennadiy Goldberg and Molly Brooks cautioned that fears of an immediate “fiscal apocalypse” may be overstated. While TD Securities projects interest expenses will climb to $1.1 trillion in fiscal 2026 and potentially reach $1.6 trillion by 2029 if rates remain elevated, they note that Washington does not need to refinance its entire debt portfolio at current high rates.
A key stabilizing factor is the weighted-average maturity of U.S. government debt, which stands at roughly 5.9 years. This structure means that higher borrowing costs are absorbed gradually as older bonds mature. Furthermore, the average coupon on Treasury securities, excluding bills, remains low at 3.1%.
Perhaps more critically, the average interest rate on U.S. debt sits at approximately 3.4%, which remains below the pace of nominal economic growth. According to the Bureau of Economic Analysis, nominal U.S. GDP expanded at an annualized rate of 8.5% in the second quarter. TD Securities emphasized that this growth differential helps maintain a manageable debt burden despite persistent deficits.
Matthew Reese, head of global bond strategies at L&G Asset Management, described the panic surrounding an imminent collapse as “exaggerated.” He acknowledged valid concerns regarding the negative feedback loop between higher yields and fiscal burdens but pointed to the enduring dominance of the U.S. dollar. “The US still retains much of the ‘exorbitant privilege’ of the US dollar and its role as the most liquid and still highly rated economy,” Reese told CNBC. “Therefore, we are some way away from a fiscal crisis.”
MacGuineas is right about the spiral risk. We’re borrowing at 5% to fund deficits that won’t close anytime soon.
Finally, some balance. The growth numbers show the dollar still holds its own despite the scary headline yields.