Glossary
100 terms you will meet on this site and in every debt headline, each defined in a few sentences. 23 of them — the ones that need more than a paragraph — have a full explanation of their own.
100 terms
Budget & spending
Laws that give federal agencies authority to spend money in a fiscal year. Congress is supposed to pass twelve of them by October 1; it last passed all of them on time for fiscal year 1997.
Debt basics
Alexander Hamilton’s plan, enacted in 1790, under which the new federal government took over the states’ Revolutionary War debts. It created the national debt as a single federal obligation and established US credit abroad.
See also National debt, Debt-free year (1835)
Interest & markets
The weighted average rate the Treasury pays across all its outstanding securities, published monthly. It lags market rates, because older debt is only replaced as it matures.
Treasury securities
The value of bids received at a Treasury auction divided by the amount sold. A falling ratio is read as weaker demand for US debt.
See also Treasury auction, Primary dealers
Money, gold & crypto
A digital currency whose protocol caps its supply at 21 million coins. It appears on this site as a modern counterpart to gold for scale comparisons, not as an investment recommendation.
Interest & markets
Investors who sell government bonds in response to loose fiscal or monetary policy, pushing yields up until policy changes. The term was coined in the 1980s.
See also Term premium, Bond yield, Crowding out
Interest & markets
The return an investor earns on a bond at its current market price. Yields move opposite to prices, and Treasury yields set the baseline for interest rates across the economy.
See also Coupon, Yield curve, Term premium, Risk-free rate
Money, gold & crypto
The postwar monetary order agreed in 1944, under which currencies were pegged to the dollar and the dollar was convertible into gold at $35 an ounce for foreign governments. It ended in the early 1970s.
See also Gold standard, Reserve currency, Fiat money
Budget & spending
The amount by which federal spending exceeds revenue in one fiscal year. Deficits are flows; the national debt is the stock they add up to.
Debt limit & Congress
A fast-track procedure that lets budget-related bills pass the Senate with a simple majority instead of 60 votes. Many of the largest tax and spending laws of recent decades used it.
See also Budget resolution, Debt ceiling, PAYGO
Budget & spending
A framework Congress adopts to set overall spending and revenue targets. It is not signed by the president and does not become law, but it is required to start the reconciliation process.
See also Budget reconciliation, Appropriations
Budget & spending
A year in which federal revenue exceeds spending, which reduces the debt held by the public. The US has run only five in more than half a century: in 1969 and from 1998 to 2001.
See also Budget deficit, Debt-free year (1835)
Budget & spending
The nonpartisan agency, created in 1974, that estimates the cost of legislation and publishes the budget and debt projections most forecasts rely on.
Fed & inflation
The Bureau of Labor Statistics’ main measure of consumer prices. It adjusts the principal of TIPS and Social Security benefits, and it is the inflation measure shown on this site.
Debt limit & Congress
A stopgap law that keeps the government funded, usually at the previous year’s levels, when Congress has not passed regular appropriations by the start of the fiscal year.
Interest & markets
The fixed interest a note or bond pays, usually twice a year, stated as a percentage of its face value.
See also Bond yield, Treasury notes, Treasury bills
Interest & markets
An agency’s assessment of how reliably a borrower will pay. All three major agencies rate the US one notch below the top grade: S&P since 2011, Fitch since 2023 and Moody’s since May 2025.
Interest & markets
The idea that heavy government borrowing absorbs savings that would otherwise fund private investment, pushing up interest rates and slowing long-run growth.
Data & measurement
A daily report of the Treasury’s cash balance, deposits, withdrawals and debt transactions. Analysts use it to track how close the government is to the X-date during debt ceiling standoffs.
Debt limit & Congress
The legal cap on how much the Treasury may borrow. It does not limit spending Congress has already approved; it limits paying for it. Congress raised it to $41.1 trillion in July 2025.
Data & measurement
A display of the national debt that appears to tick in real time. The first public one went up near Times Square in New York in 1989. Every debt clock interpolates between official daily figures.
Debt basics
The part of the national debt owed to lenders outside the federal government: investors, banks, pension funds, foreign governments and the Federal Reserve. It is the measure most economists mean when they talk about the debt.
Debt limit & Congress
Instead of raising the ceiling to a new number, Congress can suspend it until a set date. When the suspension ends, the limit is reset to the amount of debt outstanding that day.
See also Debt ceiling, Extraordinary measures
Fed & inflation
Financing government deficits by creating money, typically through central bank purchases of government debt. It avoids borrowing from private lenders but risks inflation if pushed too far.
Debt basics
The national debt divided by the population. It measures scale, not a bill: no individual owes a share, but the debt is serviced from taxes that residents ultimately pay.
Debt basics
The debt divided by the number of people who pay federal income tax rather than by the whole population, which makes each share much larger. The result depends heavily on which count of taxpayers is used.
Debt basics
A feedback loop in which rising debt pushes up interest costs, which require more borrowing, which raises the debt further. Once interest dominates the deficit, the loop can continue even if other spending is frozen.
Data & measurement
The measure the debt ceiling actually applies to. It differs slightly from total public debt outstanding because a few items, such as certain discounts on securities, are treated differently.
See also Debt ceiling, Debt to the Penny, Extraordinary measures
Debt basics
Whether a government can keep its debt stable or falling relative to the economy without a sudden, drastic change in taxes or spending. It depends mainly on the primary balance and on the gap between interest rates and growth.
See also r minus g, Primary deficit, Debt spiral
Data & measurement
The Treasury’s official daily record of total public debt outstanding, split into debt held by the public and intragovernmental holdings. It is the source of the headline figure on this site.
Debt basics
The only time the national debt was fully repaid, under President Andrew Jackson, funded largely by federal land sales. A severe financial crisis, the Panic of 1837, followed two years later.
Debt basics
Debt measured against the size of the economy, usually annual gross domestic product. It is the comparison economists prefer, because a larger economy can carry a larger debt.
Budget & spending
Spending Congress sets each year through appropriations bills, covering defence and most federal agencies. It is the part of the budget that annual budget fights are actually about.
See also Mandatory spending, Appropriations, Sequestration
Budget & spending
Programs that pay benefits to anyone who meets the eligibility rules, such as Social Security and Medicare. Their cost is determined by law and demographics, not by an annual vote.
Fed & inflation
The advantage the US gains from issuing the world’s main reserve currency: steady demand for its debt and the ability to borrow from abroad in its own money. The phrase is attributed to French finance minister Valéry Giscard d’Estaing in the 1960s.
See also Reserve currency, Foreign holders
Debt limit & Congress
Accounting steps the Treasury uses to keep paying bills after hitting the debt ceiling, such as temporarily suspending investments in certain federal employee retirement funds. They delay the X-date but do not remove it.
Fed & inflation
The overnight rate at which banks lend reserves to each other, and the main rate the Federal Reserve targets. Its changes pass quickly into the cost of new Treasury bills.
See also Federal Reserve, Treasury bills, Yield curve
Budget & spending
All money the federal government collects: mainly individual income taxes, payroll taxes for Social Security and Medicare, and corporate income taxes.
Fed & inflation
The US central bank. It sets short-term interest rates and holds a large portfolio of Treasury securities, which by law it buys in the open market rather than directly from the Treasury.
Money, gold & crypto
Money that has value because the government declares it legal tender and people accept it, not because it can be redeemed for a commodity. The dollar has been a fiat currency since the link to gold ended in the 1970s.
See also Gold standard, Hard assets, Inflation
Data & measurement
The Treasury’s open-data portal at fiscaldata.treasury.gov. It publishes Debt to the Penny, average interest rates and the Monthly Treasury Statement, including through a free public API.
Debt basics
A situation in which government debt is so large that the central bank feels pressure to keep interest rates low to protect public finances, rather than setting them to control inflation.
See also Debt monetization, Federal Reserve, Debt spiral
Budget & spending
The permanent, immediate change in taxes or spending needed to keep the debt from rising relative to GDP over a long horizon. It expresses future budget pressure as a single policy number.
Budget & spending
The federal budget year, which runs from October 1 to September 30 and is named for the calendar year in which it ends. Fiscal year 2026, for example, began on October 1, 2025.
Treasury securities
Two-year Treasury securities whose interest resets weekly, tied to the rate at the most recent 13-week bill auction.
See also Treasury bills, Treasury notes
Treasury securities
Governments, central banks and private investors outside the US that own Treasury securities. Together they hold a large minority of the debt held by the public; Japan has been the largest single holder in recent years.
Money, gold & crypto
A monetary system in which currency can be exchanged for a fixed amount of gold. The US dollar was tied to gold in various forms until 1971, when President Nixon ended convertibility for foreign governments.
Money, gold & crypto
How many ounces of silver buy one ounce of gold. Once fixed by law at around 15 to 1, it now floats and is watched as a gauge of fear and of which metal looks cheap.
Debt limit & Congress
What happens when federal funding lapses: agencies must stop work that is not legally exempt. Social Security benefits and interest on the debt keep being paid. The longest shutdown, in 2025, lasted 43 days.
Fed & inflation
The total value of goods and services produced in a country in a year. It is the standard yardstick for how much debt an economy can carry.
Money, gold & crypto
Assets whose supply cannot be expanded by a government decision, such as gold, silver and, by design, Bitcoin. Pricing the debt in them shows it against something no Treasury can issue.
Fed & inflation
A general rise in prices that erodes the purchasing power of money. It also shrinks the real value of existing debt, which is why heavily indebted governments are suspected of tolerating it.
Interest & markets
What the government pays lenders to carry the debt. It is paid without an annual vote, grows with both the debt and interest rates, and has become one of the largest items in the federal budget.
Debt basics
Debt the Treasury owes to other parts of the federal government, overwhelmingly trust funds such as Social Security and federal retirement funds. These securities are never traded in financial markets.
Debt basics
Bonds sold directly to the public to finance US involvement in the First World War. The Second Liberty Bond Act of 1917 gave the Treasury general borrowing authority and is the origin of today’s debt ceiling.
See also Debt ceiling, Savings bonds
Budget & spending
The Congressional Budget Office’s projection of deficits and debt over the next 30 years under current law. It is a baseline showing where existing policy leads, not a forecast of what Congress will do.
Budget & spending
Spending that flows automatically under existing law rather than through annual votes, chiefly Social Security, Medicare and Medicaid. Together with interest it accounts for well over two thirds of federal outlays.
Money, gold & crypto
The total value of an asset’s supply at its current price: price times the number of coins or shares. Comparing it with the debt shows the relative scale of each.
See also Bitcoin, Hard assets
Treasury securities
Marketable Treasury securities can be bought and sold by anyone after they are issued. Non-marketable ones, such as savings bonds and the special securities held by trust funds, cannot.
Treasury securities
The date on which a security’s principal is repaid. The average maturity of the debt determines how quickly changes in interest rates feed into the government’s costs.
Budget & spending
The accounts that finance Medicare. The Hospital Insurance fund, paid for mainly by payroll taxes, faces a projected shortfall; the funds covering doctor visits and prescription drugs are financed largely from general revenue each year.
Data & measurement
The Treasury’s official monthly report of receipts, outlays and the deficit. The fiscal-year-to-date figures on this site come from it.
Debt basics
The total the federal government has borrowed and not yet repaid, accumulated since 1790. It is a stock, not an annual figure: every deficit adds to it, and a surplus subtracts from it.
Budget & spending
The White House office that prepares the president’s budget proposal and oversees how federal agencies spend the money Congress provides.
Budget & spending
A single bill that bundles several or all of the annual appropriations bills, usually passed late and under deadline pressure.
See also Appropriations, Continuing resolution
Budget & spending
Money the federal government actually pays out in a period, as opposed to what Congress authorises it to spend. Outlays minus receipts is the deficit.
Budget & spending
A budget rule requiring new tax cuts or mandatory spending increases to be offset so they do not add to the deficit. Congress has frequently waived it.
See also Sequestration, Budget deficit
Treasury securities
Large banks and securities firms that are expected to bid in every Treasury auction and that trade directly with the Federal Reserve.
See also Treasury auction, Federal Reserve
Budget & spending
The deficit excluding interest payments. It shows what current policy costs on its own, separate from the bill for past borrowing.
Debt limit & Congress
Section 4 of the 14th Amendment: “The validity of the public debt of the United States, authorized by law … shall not be questioned.” It is raised in every debt ceiling standoff but has never been used to override the limit.
Fed & inflation
Large-scale purchases of Treasury and mortgage securities by the Federal Reserve to push down long-term interest rates, used after the 2008 financial crisis and again in 2020.
Fed & inflation
The Federal Reserve shrinking its balance sheet by letting securities mature without reinvesting the proceeds, which leaves more Treasury debt for private investors to absorb.
Interest & markets
The gap between the interest rate on government debt (r) and the economy’s growth rate (g). When r is below g, debt can shrink relative to GDP even with modest deficits; when r is above g, it compounds.
See also Debt sustainability, Primary deficit, Debt-to-GDP ratio
Fed & inflation
Nominal figures are in the dollars of the day; real figures are adjusted for inflation. Comparing debt across decades in nominal dollars exaggerates its growth, which is one reason debt-to-GDP is more informative.
See also Inflation, Debt-to-GDP ratio, Consumer Price Index (CPI)
Fed & inflation
A currency that central banks and institutions hold in large amounts for trade, savings and crisis protection. The dollar’s dominant role creates steady global demand for Treasury securities.
Interest & markets
The return on an investment with no credit risk, conventionally the yield on short-term US Treasury bills. Much of global finance prices loans and assets relative to it.
See also Treasury bills, Bond yield, Federal funds rate
Treasury securities
Repaying maturing debt by issuing new debt. Trillions of dollars roll over every year, so the interest rate on new borrowing matters as much as the size of the deficit.
See also Maturity, Treasury auction, Interest on the debt
Data & measurement
The pace at which the debt has recently been growing, used to project the figure between official Treasury updates. Every live debt clock extrapolates this way; this site shows the confirmed figure beside the estimate.
Treasury securities
Non-marketable Treasury securities sold directly to individuals. Unlike bills and bonds they cannot be resold, and they make up a very small share of the debt.
Budget & spending
Automatic, across-the-board spending cuts triggered when Congress fails to meet budget targets. The best-known round followed the Budget Control Act of 2011.
See also Discretionary spending, PAYGO
Budget & spending
Accounts that hold Social Security’s accumulated surpluses as special Treasury securities. They are the largest component of intragovernmental debt and are projected to run short in the 2030s.
Debt basics
Debt issued by a national government. When it is borrowed in the government’s own currency, as US debt is, the main risks are not running out of money but inflation, rising interest costs or a political failure to pay.
See also Sovereign default, Credit rating (US), Reserve currency
Interest & markets
A government’s failure to pay interest or principal in full and on time. The US has never deliberately missed a payment on its debt; the realistic risks are a debt ceiling breach or erosion by inflation.
Money, gold & crypto
The price for immediate delivery of a commodity such as gold or silver, as opposed to a futures price agreed now for delivery later.
Budget & spending
The part of the deficit that would remain even if the economy were running at full capacity. It shows the underlying gap in policy, stripped of the temporary effects of recessions and booms.
See also Budget deficit, Primary deficit
Budget & spending
Deductions, credits and exclusions in the tax code. They reduce revenue rather than increase spending, but economically they work much like spending programs delivered through the tax system.
See also Federal receipts, Budget deficit
Interest & markets
The extra yield investors demand for lending long-term instead of rolling over a series of short-term loans. A rising term premium can signal concern about deficits or inflation.
See also Bond yield, Yield curve, Bond vigilantes
Data & measurement
The Treasury International Capital system: monthly data on cross-border holdings of US securities. It is the source for how much US debt China, Japan and others hold, and it records where securities are held in custody, which is not always who ultimately owns them.
Treasury securities
Treasury securities whose principal rises with consumer prices, protecting investors against inflation. The gap between their yield and that of ordinary Treasuries shows what markets expect inflation to be.
Treasury securities
The way the Treasury sells new securities: investors bid, and every winning bidder receives the same rate. Hundreds of auctions a year refinance maturing debt and raise new cash.
Treasury securities
Short-term Treasury securities maturing in one year or less. They pay no coupon: investors buy them below face value and receive the full amount at maturity.
Treasury securities
The longest-dated Treasury securities, issued with 20- and 30-year maturities and paying fixed interest every six months.
See also Treasury notes, Term premium, Bond yield
Fed & inflation
The federal government’s main bank account, held at the Federal Reserve. Its balance is the cash that runs down towards zero when the debt ceiling binds.
See also X-date, Daily Treasury Statement, Federal Reserve
Treasury securities
Treasury securities maturing in two to ten years that pay fixed interest every six months. The 10-year note is the benchmark for US mortgage rates and much of global finance.
See also Treasury bills, Treasury bonds, Bond yield, Coupon
Treasury securities
The IOUs the federal government sells to borrow: bills, notes, bonds, TIPS and floating rate notes. The national debt is made of them.
Debt limit & Congress
A proposed way around the debt ceiling: the Treasury would mint a platinum coin with an enormous face value under a 1996 coinage law and deposit it at the Federal Reserve. The Treasury and the Fed have consistently rejected it.
Money, gold & crypto
The unit precious metals are priced in, equal to about 31.1 grams — roughly ten percent heavier than an ordinary ounce.
See also Spot price, Gold-silver ratio
Budget & spending
The gap between what Social Security and Medicare are scheduled to pay over coming decades and the dedicated revenue expected to fund them. It is a projection under current law and is not counted in the national debt.
Debt limit & Congress
The day the Treasury would run out of cash and extraordinary measures after hitting the debt ceiling. After it, the government could not pay all its bills on time.
Interest & markets
A chart of Treasury yields across maturities. Normally longer loans pay more; when short-term yields exceed long-term ones the curve is inverted, which has often preceded recessions.
See also Bond yield, Term premium, Federal funds rate