Methodology
Where every number comes from
No figure on this site is invented, adjusted or smoothed for effect. Here is the full chain, including the parts that are estimates and why.
The live number is an estimate, and here is exactly what kind
The US Treasury publishes the official debt figure once per business day, covering a date two to four business days earlier. There is no feed of the true instantaneous debt, because no such quantity exists — the debt moves in discrete jumps as securities are issued and redeemed, not continuously.
So the ticking number is: last official figure + measured growth rate × elapsed time. The most recent official figure is $40,047,726,949,770, published for September 10, 2026.
The growth rate is not assumed. It is calculated from the trailing 90 days of actually reported debt, giving $107,734 per second. Over the full available history the average is $75,208 per second — the gap between the two is a measure of how much borrowing has accelerated.
Ninety days is a deliberate compromise. A shorter window lets a single quarterly refunding dominate the slope; a longer one smooths away the current borrowing regime entirely.
Your browser checks the Treasury itself
This site has no server and no database. The figures are baked into the page at build time so the first paint shows real numbers, and then your browser queries the US Treasury, the World Bank, CoinGecko and the metals feed directly. Nothing is proxied through us and nothing can be altered in transit by us.
The debt baseline is re-checked every ten minutes and market prices every five. If the Treasury publishes a newer figure while the page is open, the clock corrects itself without a reload.
Every source
| Figure | Source | Updates |
|---|---|---|
| Total public debt outstandinglive | US Treasury — Debt to the Penny | Every business day, reported 2–4 business days in arrears |
| Debt held by the public / intragovernmental splitlive | US Treasury — Debt to the Penny | Every business day |
| Interest expense on the public debt | US Treasury — Interest Expense on the Public Debt Outstanding | Monthly |
| Average interest rate paid | US Treasury — Average Interest Rates on US Treasury Securities | Monthly |
| Federal receipts, outlays and deficit | US Treasury — Monthly Treasury Statement, Table 1 | Monthly |
| Gross domestic product | World Bank — NY.GDP.MKTP.CD | Annual |
| US population | World Bank — SP.POP.TOTL | Annual |
| Consumer price index | US Bureau of Labor Statistics — CPI-U (CUUR0000SA0) | Monthly |
| Gold and silver spot priceslive | gold-api.com | Continuous |
| Bitcoin and Ethereum priceslive | CoinGecko | Continuous |
Figures that are fixed, and why
These have no free, machine-readable feed. They are hard-coded and listed here with their sources rather than quietly estimated, because a number you might quote should never look more current than it is.
| Figure | Value | Source | As of |
|---|---|---|---|
| Income-tax-paying filers | 128,800,000 | IRS Statistics of Income — individual returns with a tax liability | 2023 filing year |
| US households | 132,200,000 | US Census Bureau — Current Population Survey | 2024 |
| Employed civilians | 163,500,000 | US Bureau of Labor Statistics — Current Population Survey | 2025 |
| US official gold reserve (troy oz) | 261,498,926 | US Treasury — Status Report of US Government Gold Reserve | essentially unchanged since 1974 |
Annualised figures
Deficit and interest are published as fiscal-year-to-date totals. Where this site shows an annual figure, the year-to-date total is scaled by the number of months elapsed in the federal fiscal year, which starts on 1 October. This is a run rate, not a forecast: federal receipts are heavily seasonal, with April in particular distorting any partial year.
Known limitations
- The live figure between Treasury publications is an extrapolation. Anyone citing an exact number should cite the Treasury’s published figure and its date, both of which are shown on the front page.
- GDP and population are annual and therefore lag. The debt-to-GDP ratio compares a current debt figure against the most recent completed year of output.
- International debt-to-GDP comparisons use different national definitions of government debt and should be read as directional.
- Program spending figures shown for scale on the interest page are approximate outlays, not exact budget lines.
Build status
All sources responded when this version was built. Snapshot taken September 13, 2026, total debt $40.05 trillion.
Use the data
The snapshot powering this site is a plain JSON file at /data/snapshot.json, and the historical series is at /data/history.json. Both are free to use. The underlying government data is public domain; a link back is appreciated but not required.