US government debt reached roughly $39 trillion by mid-2026, the accumulated total of every dollar the federal government has borrowed to cover spending that tax revenue did not fund.1Joint Economic Committee. National Debt Hits $38.43 Trillion That works out to about $113,600 per person.2Joint Economic Committee. Monthly Debt Update The balance grows whenever annual spending exceeds annual revenue, and the Treasury covers the gap by selling securities to investors and by borrowing from federal trust funds. Wars, recessions, tax cuts, and expanded programs have all added to the total, and the pace of growth has accelerated since the early 2000s.
The Two Halves of the Debt
The total debt splits into two very different pieces.
Debt held by the public is money borrowed from outside the federal government: individuals, corporations, mutual funds, pension funds, foreign governments, and the Federal Reserve. This portion makes up about 80% of the total and sits above $31 trillion. It’s made up of marketable securities traded on the open market, and the interest flows out to bondholders across the world.3U.S. Treasury Fiscal Data. Debt to the Penny
Intragovernmental holdings account for the remaining roughly $7.6 trillion. This is money the government owes itself. When programs like Social Security or federal employee retirement funds collect more than they pay out, the surplus buys special non-marketable Treasury securities. The Treasury uses the cash for general operations and credits the trust fund with an IOU. These internal obligations are legally real: when Social Security needs to pay more in benefits than it collects, the Treasury has to redeem those securities and produce actual cash.4U.S. Treasury Fiscal Data. Understanding the National Debt
The split matters because the two pieces behave differently. Public debt responds to market conditions, interest rates, and investor confidence. Intragovernmental holdings shift with the financial health of the underlying trust funds. As Social Security draws down its surplus over the coming decades, those internal IOUs will gradually convert into debt held by the public, pushing more borrowing into open markets.
How the Treasury Borrows
The Treasury borrows by auctioning several kinds of securities, each built for a different time horizon.
Treasury bills mature in a year or less and come in seven terms: 4, 6, 8, 13, 17, 26, and 52 weeks.5TreasuryDirect. Treasury Bills Bills don’t pay periodic interest; you buy them at a discount and collect the face value at maturity.
Treasury notes carry maturities of 2, 3, 5, 7, or 10 years and pay a fixed coupon every six months.6TreasuryDirect. Treasury Notes The 10-year note is the one to watch: its yield feeds through to mortgage rates, corporate borrowing costs, and a wide range of consumer products.
Treasury bonds run 20 or 30 years and also pay semiannual interest. They’re the workhorse for pension funds and insurers that need predictable income far out into the future.
Treasury Inflation-Protected Securities, or TIPS, adjust their principal up or down with the Consumer Price Index. Interest is paid on the adjusted principal, and at maturity investors receive the inflation-adjusted amount or the original face value, whichever is greater.7TreasuryDirect. Treasury Inflation-Protected Securities (TIPS) TIPS come in 5-, 10-, and 30-year terms.
Floating rate notes mature in two years, but their rate resets weekly against the most recent 13-week bill auction, with quarterly interest payments.8TreasuryDirect. Floating Rate Notes
Savings bonds are the retail exception. Series I bonds combine a fixed rate set at purchase with a variable inflation rate that resets every six months; the composite rate in early 2026 was 4.03%, on a 0.90% fixed rate.9TreasuryDirect. I Bonds Series EE bonds pay a fixed rate and are guaranteed to double if held for 20 years.10U.S. Treasury Fiscal Data. Treasury Savings Bonds Explained Both are sold through TreasuryDirect and can’t be traded on secondary markets.
Who Actually Owns It
Ownership of publicly held debt breaks into three groups: the Federal Reserve, foreign holders, and domestic private investors.
The Federal Reserve
The Fed held about $4.4 trillion in Treasury securities as of early 2026.11Federal Reserve. Factors Affecting Reserve Balances – H.4.1 Buying and selling Treasuries is the Fed’s main tool for managing the money supply and steering interest rates. During crises it has expanded these purchases sharply to push long-term rates down. More recently it has been shrinking the portfolio, a process known as quantitative tightening, which returns debt to private hands and tends to lift yields.
Foreign Holders
Foreign governments and private investors together held $9.3 trillion in Treasury securities as of January 2026. Japan leads at $1.2 trillion, followed by the United Kingdom at $895 billion and China at $694 billion. Belgium, Luxembourg, the Cayman Islands, and Canada round out the top holders.12U.S. Department of the Treasury. Major Foreign Holders of Treasury Securities China’s holdings have fallen substantially over the past decade, from above $1.3 trillion to under $700 billion, while Japan and the UK have added to their positions. The Treasury tracks these cross-border flows through the Treasury International Capital reporting system.13U.S. Department of the Treasury. Treasury International Capital (TIC) System
Domestic Private Investors
The largest slice of publicly held debt belongs to domestic private investors: mutual funds, banks, insurers, state and local pension funds, and individuals. Private investors held roughly $26.6 trillion in federal debt in late 2025 (a figure that also captures foreign private holdings, with domestic institutions making up the majority).14Federal Reserve Bank of St. Louis. Federal Debt Held by Private Investors Most Americans participate indirectly through retirement accounts, 401(k) plans, and mutual funds rather than by buying Treasuries directly.
What the Debt Costs to Carry
Every dollar outstanding carries an interest obligation, and those costs are now one of the fastest-growing lines in the federal budget. The Congressional Budget Office projected net interest outlays would top $1 trillion in fiscal year 2026, up from $970 billion in 2025.15Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036 Roughly 15 cents of every federal dollar spent now goes to interest rather than services, defense, or benefits.
Two variables drive the cost: the size of the debt and the rate paid on it. The post-2022 rise in rates hit hard because the Treasury had to roll trillions of maturing low-rate securities into new debt at much higher yields. Interest is essentially non-negotiable. Congress can adjust defense spending or benefit formulas, but it can’t choose to pay less interest without defaulting. That makes it a compounding problem: interest adds to the deficit, the deficit forces more borrowing, and more borrowing generates more interest. The CBO projects net interest will reach 4.6% of GDP by 2036 under current policies, a level that would rival Medicare or defense spending.15Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036
Debt Compared to the Size of the Economy
Raw dollars alone can mislead, because they don’t reflect what the economy can support. Economists use the debt-to-GDP ratio for that reason: total public debt divided by annual gross domestic product. In late 2025, that ratio stood at about 122%, meaning debt exceeded a full year of economic output by more than a fifth.16Federal Reserve Bank of St. Louis. Federal Debt: Total Public Debt as Percent of Gross Domestic Product Before the 2008 financial crisis, that ratio was around 60%. It surged past 100% during the pandemic and has not come back down.
The Debt Ceiling
The debt ceiling is a legal cap on how much total debt the federal government can have outstanding. It doesn’t authorize new spending. It only allows the Treasury to borrow the money needed to pay for obligations Congress has already approved through appropriations and tax laws.
Congress established the first true aggregate limit in 1939 at $45 billion, replacing an older system that approved bond issuances more granularly.17Congressional Research Service. The Debt Limit: History and Recent Increases Since then, Congress has modified the ceiling more than 100 times, sometimes raising it to a specific dollar amount and sometimes suspending it entirely for a set period.
Extraordinary Measures
When outstanding debt approaches the limit, the Treasury Secretary declares a “debt issuance suspension period” and turns to a set of accounting maneuvers known as extraordinary measures. These include:
- Suspending new investments in the Civil Service Retirement and Disability Fund and the Postal Service Retiree Health Benefits Fund, which frees up tens of billions in borrowing room.
- Temporarily disinvesting the Thrift Savings Plan’s G Fund, which held roughly $298 billion as of early 2025.
- Halting sales of State and Local Government Series securities to municipal bond programs.
- Disinvesting the roughly $20 billion dollar balance of the Exchange Stabilization Fund.
These measures buy time; they don’t solve the problem. Once they’re exhausted, the Treasury cannot pay all the government’s bills on schedule, which would constitute a default.18U.S. Department of the Treasury. Description of Extraordinary Measures
Where Things Stand Now
Extraordinary measures were invoked in January 2025 after the previous debt ceiling suspension expired. In July 2025, Congress raised the debt limit by $5 trillion to $41.1 trillion through a budget reconciliation law.19Congressional Research Service. Debt Limit Suspensions With total debt at roughly $39 trillion, that leaves some runway before the next confrontation, though steady borrowing shrinks the buffer.
Where the Trajectory Points
The path matters more than the snapshot, and the path points upward. The CBO projects federal debt held by the public will reach 120% of GDP by 2036 under current law, driven by growing entitlement spending, rising interest, and revenue that fails to keep pace.20Congressional Budget Office. The Budget and Economic Outlook: 2026 to 2036 That projection assumes no new spending programs and no major tax cuts beyond current law. Policy changes in either direction would shift the line.
The practical risk isn’t that the U.S. will suddenly lose the ability to borrow. A country that borrows in its own currency, whose debt is the world’s reserve asset, has more room than most. The risk is slower. As interest payments consume a larger share of the budget, they crowd out spending on everything else. Every dollar going to bondholders is a dollar not going to infrastructure, research, defense, or benefits. Rising debt can also push long-term rates higher, raising borrowing costs for businesses and homebuyers alongside the government. None of that arrives on a fixed date. It tightens with each additional year of large deficits.