How big is the U.S. national debt?

Methodology. The debt total is from the U.S. Treasury’s Debt to the Penny dataset — the official daily accounting of every dollar the federal government owes, reported to the penny. The per-resident figure divides that total by an estimated 2026 U.S. resident population of about 342 million. Growth is measured over August 10–September 28, 2026.

The number: $40,102,185,696,865.37

That is the debt to the penny on September 28, 2026 — $40.10 trillion. It is the gross federal debt: every Treasury bill, note, and bond outstanding, plus the securities the government owes to its own trust funds. For context, the entire U.S. economy produces roughly $30 trillion of output in a year, so the debt is well over a full year’s national income.

Debt per resident: about $117,000

Divide $40.10 trillion by roughly 342 million U.S. residents and you get about $117,000 of debt per resident — every man, woman, and child. To be clear about what this means and doesn’t: it is an arithmetic average, not a bill anyone owes. Nobody receives an invoice for it. But it is the standard way to express the scale of the debt in human terms, and it is how we will report it on this site.

Try the debt-per-resident calculator to see the figure for any household size.

How fast it is growing

Between August 10 and September 28, 2026 — 34 days — the debt rose from roughly $39.89 trillion to $40.10 trillion, an increase of about $210 billion. That averages to roughly $6 billion per day, or about $250 million per hour, around the clock.

Debt does not grow in a straight line — it moves with borrowing auctions, tax receipts, and benefit payments — but the direction over this window is unambiguous.

What the debt is made of

The $40.10 trillion comes in two buckets. Debt held by the public — Treasury securities owned by investors, banks, the Federal Reserve, foreign governments, and mutual funds — is the portion that competes for savings in financial markets and on which the government pays interest to outside lenders. Intragovernmental holdings are securities the Treasury has issued to federal trust funds (such as Social Security’s) — essentially IOUs the government owes itself, representing money those programs have lent to the rest of the government.

Is $40 trillion too big?

That is the question everyone asks, and the honest answer is that economists measure debt against the economy’s ability to carry it — usually as a share of GDP — rather than as a raw dollar figure. What is not in dispute: the debt is at historic highs, interest on it now costs more than $1 trillion a year, and every additional trillion borrowed today raises the interest bill tomorrow. We report the numbers; what to do about them is up to voters and their representatives.

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