United States
The US debt clock takes the most recent official snapshot from Treasury Fiscal Data (Debt to the Penny), the Bureau of Economic Analysis, the Federal Reserve, the Bureau of Labor Statistics, and the Census Bureau, and interpolates each instant with the published annual growth rates.
Gross federal debt vs debt held by the public
The headline series is total (gross) federal debt from Treasury’s Debt to the Penny. It sums debt held by the public and intragovernmental holdings (such as the Social Security trust funds). The statutory debt ceiling set by Congress applies to this total, and it is not the same as the narrower debt-held-by-the-public figure often used in international comparison. The FAQ and glossary surface this difference explicitly.
When this page's numbers differ from elsewhere
US debt data is easier to access than most countries', which paradoxically means there are several series and values diverge. This page starts from Debt to the Penny, published by the Treasury every business day. Figures quoted in coverage, by contrast, are often debt held by the public, or the total including intragovernmental holdings — and the difference between them runs to trillions of dollars.
There is also the federal versus state and local distinction. This page's headline is on a federal basis and excludes state and local government debt. The general government basis used in international comparison includes them, so when placing the US figure beside another country's, the perimeter has to be aligned first.
On base dates, the US has an unusually short interpolation interval, because the debt outstanding updates daily. But GDP is quarterly and population is an annual estimate, so for debt per person or the ratio to GDP, the estimated interval on the denominator side is far longer — worth keeping in mind.
When viewing values in another currency, the date of the applied exchange rate becomes an extra variable. This site states the applied rate and its base date at the top of the screen, so aligning these three — series, perimeter, exchange rate — explains most discrepancies against other sources.
What the US page tracks
The headline is Total Public Debt Outstanding from Treasury’s Debt to the Penny: debt held by the public, such as marketable Treasury securities, plus intragovernmental holdings owned by federal accounts such as the Social Security and Medicare trust funds. It covers federal debt only and excludes state and local government debt, federally guaranteed loans and Social Security’s unfunded promises.
For households, the page uses the New York Fed Household Debt and Credit Report (HHDC). Its total combines mortgages, home equity lines of credit (HELOC), auto loans, credit cards, student loans and other consumer loans; the page shows mortgage and credit card balances alongside as sub-series.
Where the official data comes from, and how it is revised
Treasury’s Bureau of the Fiscal Service publishes the previous business day’s balance in Debt to the Penny every business day, and the detailed composition at month-end in the Monthly Statement of the Public Debt (MSPD). Daily balances are almost never revised, which makes this the freshest anchor of the five countries. Receipts and outlays come from the Monthly Treasury Statement (MTS) on a fiscal-year basis (October to September), released on the eighth business day of each month.
GDP is estimated three times per quarter by the Bureau of Economic Analysis (BEA) — advance, second and third — and past values are revised in the annual update each autumn and in comprehensive updates roughly every five years. Population comes from the Census Bureau’s vintage estimates; each December a new vintage rewrites earlier years as well. The household debt report appears quarterly, about six weeks after the quarter ends.
How the live counter moves for the US
Because the US anchor is refreshed every business day, the interpolation interval on the numerator side is short. There are periods, though, that a smooth curve cannot reproduce. When the debt limit is reached, Treasury uses extraordinary measures to hold debt subject to the limit in place; the official balance then stays flat for months and jumps sharply in a short time once the limit is suspended or raised. During such periods the gap between the estimate on screen and the actual daily balance is larger than usual.
- Headline series base date
- 2026-10-16
- Annual growth rate g applied
- 6.38%
- Increase per second at the base date
- $79,116
- Household debt base date
- 2026-03-31
- Formula and base-date rules
- Methodology
Known limitations of the US data
First, intragovernmental holdings are debts the federal government owes to its own trust funds, so discussions of economic burden often use debt held by the public alone. The total shown here matters because it is almost the same perimeter as the debt subject to the statutory limit. Second, the household debt report is based on the New York Fed Consumer Credit Panel, a random sample of Equifax credit records, so its scope and figures differ from household debt in the Federal Reserve’s Financial Accounts (Z.1).
Third, the official reserve assets card is an estimated series based on Treasury data and is not interpolated. Fourth, debt-to-GDP and debt per person use quarterly and annual denominators, so their base dates lag the daily numerator by several months.
How to check the headline yourself
Open the Debt to the Penny dataset on the Fiscal Data site and you will see three columns by date: debt held by the public, intragovernmental holdings and total public debt outstanding. The total column on the same date as the base date here is the starting point; comparing the actual values on later dates with the estimate on screen shows you the interpolation error directly. The dataset offers CSV and JSON downloads and an API, so the same comparison can be automated.
For household debt, check the quarterly total and the balances by category in the data file posted alongside the New York Fed report. The total includes student and auto loans, so adding this page’s two sub-series — mortgages and credit cards — will naturally fall short of it.
Further reading on this country
Stories
- Why U.S. Federal Debt-to-GDP Has to Be Read Alongside the Dollar's Reserve Status
- The weight of interest — what tightens the budget before the debt does
- Who buys government debt — the same debt carries different risk depending on who holds it
- Does Inflation Really Melt Away National Debt?
- The numbers on a debt clock are interpolated estimates, not real-time measurements
Comparisons
To cite a figure, carry the citeAs field and base date from /api/usa/snapshot.json.