It was a sobering moment for America on Wednesday when the national debt passed the USD 40 trillion mark. The move has only served to amplify the strain on the government’s ability to manoeuvre and on those in the market. Multiple assessments suggest this rapid ascent is already translating into stiffer borrowing costs and more difficult fiscal trade-offs.
One can see the acceleration in the numbers: from USD 38 trillion in October to USD 39 in March, and then to USD 40 five months on. By the time business closed on Tuesday, Reuters was citing Treasury figures for total public debt of $40.047 trillion.
Why the $40 trillion mark matters
The impact is being felt well ahead of any official policy. Federal borrowing is pushing up the price of mortgages and car loans, putting a crimp in business investment and nudging prices on common goods and services higher, say economists.
‘The federal debt is already raising the cost of living and choking off other forms of spending and investment,’ said Margaret Spellings of the Bipartisan Policy Center. ‘It is a threat to our economy and the long-term prosperity of Americans.’ In her view the path is ‘plainly unsustainable’ even without the added shock of a recession or AI disruption.
What is driving the surge
There is no shortage of reasons for the mounting burden. Reports point to defence, Social Security, Medicare and the larger interest tab on old deficits. The administration has had to square the circle between war-time needs and cost-of-living objectives, not least with the Iran war entering its sixth month and the push to bring down grocery and gas bills.
AFP has noted that the rate of borrowing is ahead of what was forecast, with some of the pressure coming from Donald Trump’s tariffs, now rendered invalid. Jessica Riedl of Brookings put it bluntly: the US has been running deficits of around $2 trillion in recent years come peace or growth.
Since Trump came to power in January 2017 the debt has more than doubled. Reuters reports the public holds $32.266 trillion of it, with another $7.782 trillion in intra-governmental obligations, a testament to how far reaching the liabilities have become.
The political response and fiscal constraints
From the White House the line is that they are tackling the issue from both the growth and spending side. ‘We have been focused on slashing waste, fraud, and abuse in federal spending while accelerating economic growth to get America’s debt-to-GDP ratio trending in the right direction,’ said spokesman Kush Desai.
But the situation is hardening. The OECD has the US in the weakest position of any developed economy. And according to the Bipartisan Policy Center, the statutory limit of USD 41.1 trillion could be reached sometime between late winter and mid-summer of 2027, forcing the hand of Congress once again.
As for what may be needed going forward, budget watchdogs are clear:
– Stabilise debt by raising taxes
– Put a lid on deficits through reduced spending
– Do both to head off a crisis
– Make ready for the 2027 ceiling at $41.1 trillion
Markets are already reacting
Washington will have to pay a premium to borrow these days. This week long-term Treasury yields hit their highest in almost 20 years, a sign of investor unease with inflation, deficits and geopolitical risk, per Reuters.
US Treasury Secretary Scott Bessent has responded with an announcement to at least double the size of buybacks for 10- to 30-year bonds to $4 billion an operation in an effort to underpin the long-end of the market. Foreigners, who own close to a third of Treasurys, have been trimming their positions over the last 12 months.
What to watch next
The steady climb from USD 38 to USD 40 trillion over successive five-month periods is indicative of structural issues, not a blip. Experts would have you believe the rising cost of borrowing is already making itself known in household budgets, with the 2027 debt ceiling set to be the next big test for policymakers.
