$1.05 Trillion a Year: How Much Interest the US Pays on Its Debt — and Why the Bill Keeps Growing
What does the U.S. government actually pay just to borrow the money it already owes?
In fiscal 2026, the United States paid $1.052 trillion in net interest on its debt — about $2.88 billion every day, and 19.5 cents of every dollar it collected in taxes.
This post is part of our depression series, which asks what a 1930s-style downturn would actually do to your money — the jobs, the house, the pension. The question here: is the debt itself the tripwire? The short answer is that the interest bill has become one of the largest items in the federal budget, and it is still growing — because the debt is bigger and new borrowing costs far more than the old debt it replaces. All figures below come from the U.S. Treasury's Monthly Treasury Statement (MTS) for fiscal 2026, published October 16, 2026, unless another source is named. The federal fiscal year runs from October 1 to September 30.
The Short Answer: $1.05 Trillion — but Four Different Numbers Circulate
Net interest — the cash the budget actually loses — was $1.052 trillion in fiscal 2026.
If you have seen a different number, you are not misreading. Four figures describe the same year, and they count different things:
The rule for this post: one measure, labelled every time. Everything below uses net interest ($1.052 trillion), because that is the budget cost — the money that actually leaves the Treasury to pay outside lenders. The other numbers appear once, here, so you can recognise them elsewhere.
How the Bill Nearly Tripled in Five Years
Net interest was $352 billion in fiscal 2021. Five years later it is $1.052 trillion — almost exactly three times as much.
Two forces did that, and both are still pushing the same way:
- More debt: Total federal debt stood at $40.2 trillion when fiscal 2026 closed on September 30 — up $2.5 trillion in a single year and roughly double the $19.6 trillion of a decade earlier, according to the Government Accountability Office's audit of Treasury's books. The part that pays interest to outside lenders, debt held by the public, was about $32.6 trillion — roughly 100% of GDP.
- Higher rates: The average interest rate on all Treasury debt was 3.531% at September 30, 2026, up from 3.363% a year earlier. But new borrowing costs far more: the 10-year Treasury yield closed at 5.05% on October 28. About a third of the debt matures within a year and must be refinanced at today's rates — so the average rate keeps climbing toward the new-issue rate even if the debt itself stops growing.
That second point is the one most coverage misses. The bill does not grow only because Washington borrows more. It grows because old, cheap debt is replaced by new, expensive debt — a repricing that runs on a timetable set years ago, when the cheap debt was issued.
What $1.05 Trillion Means in Human Terms
Interest now takes about 19.5 cents of every tax dollar — more than the entire national defense budget.
- $2.88 billion a day: the average daily interest cost in fiscal 2026, up from about $2.66 billion a day in fiscal 2025.
- About $3,070 per person: $1.052 trillion divided by roughly 343 million residents.
- 14.2 cents of every dollar spent: net interest was $1.052 trillion of $7.396 trillion in total outlays. The government collected $5.403 trillion and ran a $1.992 trillion deficit — and interest alone was 52.8% of that deficit.
- Bigger than defense, just behind Medicare: on the Treasury's books, national defense cost $965 billion and Medicare $1.073 trillion. Interest sits between them — ahead of every other program except Social Security and Medicare.
- A record share of revenue: 19.5% of receipts beats the previous record of 18.5% set in fiscal 2025, itself the highest since the series begins in 1940. The old record, 18.4% in 1991, was set when the debt was half today's size relative to the economy and rates were around 8%.
Interest buys nothing. It builds no roads, funds no benefits, and pays no salaries. It is the price of borrowing already done — and unlike other spending, Congress does not vote on it each year. It arrives as a bill.
Where the Bill Goes Next: The CBO's Trajectory
On current law, the Congressional Budget Office expects net interest to reach $2.14 trillion by 2036 — about one dollar in four of all tax revenue.
- The 2036 picture: in the CBO's February 2026 baseline, net interest rises from 3.3% of GDP in 2026 to 4.6% in 2036, while debt held by the public climbs from 101% to 120% of GDP.
- The decade's total: cumulative net interest over the next ten years comes to about $16.2 trillion, according to the Peter G. Peterson Foundation's tracker.
- The long run: on the CBO's extended baseline, net interest reaches 6.9% of GDP by 2056 — about 37 cents of every revenue dollar.
- The sensitivity: the CBO's rule of thumb is that interest rates 0.1 percentage points higher than expected add $379 billion to the ten-year deficit. Rates are the lever Congress controls least.
- Already moving: the first month of fiscal 2027 (October 2026) added $103 billion in net interest, up 13.4% from a year earlier, at an average rate of 3.580%.
What would change the path? Three things: lower interest rates, a smaller primary deficit (the deficit before interest — about $940 billion in fiscal 2026), or faster economic growth that shrinks the debt relative to the economy. None of the three is in the current forecast.
The Minsky Test: Is the U.S. in Ponzi Finance?
By Hyman Minsky's definitions, the federal budget runs on speculative finance — it pays the interest but rolls the principal over forever. That is normal for a government, and it is not the same as a Ponzi scheme.
Minsky sorted borrowers into three kinds. Hedge finance means cash flow covers interest and principal. Speculative finance means cash flow covers interest only, and the principal must be rolled over. Ponzi finance means cash flow covers neither interest nor principal, so survival needs rising asset prices or new borrowing.
The U.S. Treasury pays its interest from tax revenue — but it repays maturing bonds by issuing new ones. By the definitions, that is speculative finance. The crucial difference is who the borrower is: a government that borrows in its own currency, can tax, and has a central bank is not a household and not a company. Minsky's framework is a lens for spotting fragility, not a timetable — it cannot say when fragility becomes a crisis, and the U.S. has rolled its principal this way for decades.
The counter-evidence matters, and this series reports it. October's jobs report showed employers adding 165,000 jobs, with unemployment at 4.1% — inside a narrow 4.1–4.3% range since March. Real GDP grew 3.4% at an annual rate in the third quarter. A depression needs a collapse in jobs and output like 1929–33, when unemployment reached 25% and real GDP fell roughly 30%. Today's numbers are nowhere near that profile. Read the jobs detail in our October jobs report breakdown.
What to watch instead of the total: the gap between the average rate on the debt (3.53%) and the rate on new borrowing (about 5%), the size of the primary deficit, and whether the interest share of revenue keeps climbing toward one dollar in four. If all three keep rising, the budget's room to respond to the next recession shrinks — whatever the economy does next.
FAQ
Who receives the interest the U.S. pays?
Holders of Treasury securities: American households directly and through pension funds, banks, insurers and money-market funds, the Federal Reserve, and foreign investors. The gross figure also includes interest credited to federal trust funds such as Social Security's — money the government pays to itself.
Is the interest bill the same as the deficit?
No. The fiscal 2026 deficit was $1.992 trillion, and net interest ($1.052 trillion) is one line inside it — about 53%. The rest, roughly $940 billion, is the primary deficit: spending beyond revenue before interest is counted.
Can the U.S. just print money to pay the interest?
Creating money to cover the bill would push up inflation — and inflation pushes up the interest rates the government itself pays on new borrowing. The bill would grow, not shrink. That is why the interest share of revenue, not the printing press, is the number to watch.
Key Takeaway
The United States paid $1.05 trillion in net interest in fiscal 2026 — the largest interest bill in its history, nearly triple the 2021 level, and almost a fifth of everything it collected. The bill is big because the debt is big and the rates on new borrowing are far above the rates on the debt being replaced. Watch the refinancing gap, not just the total: as long as new debt costs about 5% and the old stock averages 3.5%, the bill grows even if borrowing stops growing.
Sources
- U.S. Department of the Treasury, Monthly Treasury Statement, September 2026 — final fiscal 2026 figures (published October 16, 2026)
- U.S. Department of the Treasury, Fiscal Data — Average Interest Rates on U.S. Treasury Securities; Debt to the Penny
- Congressional Budget Office, The Long-Term Budget Outlook: 2026 to 2056 (February 2026)
- Congressional Budget Office, Monthly Budget Review, fiscal 2026
- Government Accountability Office, audit of Treasury financial schedules (released November 2026)
- Office of Management and Budget, Historical Tables, FY2027 Budget — net interest series 2021–2025
- U.S. Bureau of Labor Statistics, The Employment Situation — October 2026 (USDL-26-1632)
- U.S. Bureau of Economic Analysis, Gross Domestic Product, Third Quarter 2026 (advance estimate)
- TFTC, Interest on the National Debt tracker (Monthly Treasury Statement data)
- USAspending, FY2026 Federal Spending: Final Numbers in 6 Charts
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