What Is the US Dollar Backed By? Debt, Law and Taxes

Not by gold: Americans lost the right to swap their notes for gold in 1934, and foreign governments lost the right to swap their dollars in 1971. A dollar note is a debt of the Federal Reserve, which by law must hold collateral against it, and 98.9% of that collateral is US Treasury, agency and mortgage-backed securities. The dollar is backed by debt owed or guaranteed by the US government and its agencies, and kept in use by legal tender law and by taxes payable only in dollars.

That does not make the dollar worthless, and “backed by nothing” is the wrong summary. Its value rests on law, on taxes, and on the economy and the world's demand for dollars. What it lacks is a limit: nothing the Fed holds caps how many dollars can be created, which is the problem bitcoin's fixed supply was built to answer.

Is the dollar backed by gold?

No. The Federal Reserve says so plainly: “Federal Reserve notes are not redeemable in gold, silver, or any other commodity” (Federal Reserve). Americans have not been able to exchange their notes for gold since 30 January 1934. Foreign governments kept the right until 15 August 1971, when President Nixon closed the gold window.

The gold has not gone anywhere. The Treasury owns 261.5 million troy ounces, 56% of it at Fort Knox, Kentucky (US Treasury). The law still values it at “42 and two-ninths dollars a fine troy ounce”, a price set in 1973 (31 U.S.C. § 5117), so the whole hoard sits on the books at $11.0 billion. As the Treasury puts it, “The book value is not the market value”.

The Fed holds that gold only at one remove, as gold certificates: claims on the Treasury's gold, worth $11.0 billion at the statutory $42.22 an ounce (H.4.1). Against $2.43 trillion of notes in circulation, that is 0.45%. The gold is carried at a price set in 1973, and no one can claim it with a note.

What does the Federal Reserve hold against the dollar?

A paper dollar is a Federal Reserve note, and the notes are a debt of the Fed: they sit on the liability side of its balance sheet (Federal Reserve). The law requires each Reserve Bank to pledge collateral for the notes it issues: “In no event shall such collateral security be less than the amount of Federal Reserve notes applied for” (12 U.S.C. § 412).

The Fed publishes that collateral every week. On 23 September 2026, the $2.43 trillion of notes in circulation were matched by:

• Gold certificates: $11.0 billion, or 0.45%.
• Special drawing rights certificates: $15.2 billion, or 0.63%. Special drawing rights are a reserve asset issued by the International Monetary Fund; the Treasury issues certificates for them to the Reserve Banks (Federal Reserve Banks, financial statements).
• Treasury, agency and mortgage-backed securities: $2.40 trillion, or 98.9% (H.4.1, table 7).

The law is generous about what counts. Besides gold and government securities, it accepts “any other asset of a Federal Reserve bank” (12 U.S.C. § 412). Central banks pay for the assets they buy by creating new reserves (Bank of England), so the rule records what stands behind the notes. It does not limit how many there can be.

The collateral is a slice of a much larger balance sheet. On the same day the Fed owned $6.75 trillion of assets, and 96% of them were US Treasury securities ($4.56 trillion) and mortgage-backed securities guaranteed by Fannie Mae, Freddie Mac and Ginnie Mae ($1.91 trillion). Its largest liability is no longer notes but the reserves banks keep with it, $2.97 trillion (Federal Reserve).

Two more lines complete the picture. The Fed's own capital is $47.7 billion, 0.7% of its assets. And because its earnings have not covered its costs, it carries $233 billion of losses as a “deferred asset”: income it must earn before it pays anything to the Treasury again (H.4.1). A central bank cannot run out of its own currency, so the losses do not stop it paying its bills.

If the collateral ever fell short, the law makes the notes “a first and paramount lien on all the assets of the Reserve Banks”, and the notes are, in the Fed's own words, “obligations of the United States government” (Federal Reserve Banks, financial statements). That last phrase leads to the real backing.

What does “full faith and credit” mean?

It is the promise behind US government debt, and so behind most of what the Fed holds. “All these securities are backed by the full faith and credit of the United States government,” the Treasury says of its bills, notes and bonds (TreasuryDirect). It is a promise to pay dollars, met from taxes and from new borrowing. Nothing physical is pledged.

The government relies on both. In fiscal 2025 it collected $5.2 trillion and spent $7.0 trillion, a deficit of $1.8 trillion (US Treasury). Its debt reached $40.2 trillion at the end of fiscal 2026 (US Treasury), and in August 2026 the Fed held 14.3% of the marketable part (Federal Reserve and US Treasury).

The notes rest on the same promise. The Federal Reserve Act says they “shall be obligations of the United States” and shall be “redeemed in lawful money on demand” (12 U.S.C. § 411). Since they are not redeemable in any commodity, redeeming a note today gets you other notes or coins.

So the risk for anyone holding dollars is less that the promise is broken than that it is kept in dollars that buy less. A dollar from August 1971 buys about 12 cents' worth today (BLS).

Other People's Debt: why your money is backed by government IOUs →

Why does the dollar have value, then?

Not because of what the Fed holds: no one can take a note to the Fed and claim a slice of its bonds. The dollar's value rests on four things outside the vault.

• Law. Dollars are “legal tender for all debts, public charges, taxes, and dues” (31 U.S.C. § 5103), which the Fed reads as making them “a valid and legal offer of payment for debts”. No federal law makes a shop take cash, though (Federal Reserve).
• Taxes. “Payments of U.S. tax must be remitted to the U.S. Internal Revenue Service (IRS) in U.S. dollars” (IRS). Everyone who owes US tax needs dollars, and federal receipts came to $5.2 trillion in fiscal 2025.
• The economy. Those taxes are a share of what Americans earn and produce. A dollar is worth what it will buy, and what it will buy is whatever Americans and others sell for dollars, so the size and strength of the economy behind it matter more to its value than the assets on the Fed's balance sheet.
• Demand from abroad. In the second quarter of 2026, 56.7% of the world's foreign exchange reserves were held in dollars (IMF), and in April 2025 the dollar was on one side of 89.2% of all currency trades (BIS).

So the dollar is backed by a legal system, a tax base, an economy and the habits of the world. What none of them provides is a fixed quantity. The amount of money is set by the Fed and the banking system, and no physical asset limits it.

What is the petrodollar? Oil, the dollar and the reserve system →

Why did the US go off the gold standard in 1971?

Because it could no longer keep the promise. Under the Bretton Woods system, foreign governments could exchange dollars for US gold at $35 an ounce, but by 1961 the dollars held as claims abroad already exceeded the government's gold (Federal Reserve History). The claims kept growing, central banks began cashing them in, and Nixon closed the gold window on 15 August 1971.

What happened in 1971? The day the dollar left gold →

What has replaced the gold standard?

A standard run by committees. The major currencies have floated against each other since March 1973 (Office of the Historian), and the IMF's rules ended gold's official role on 1 April 1978 (IMF). In place of a gold price, the Federal Reserve aims for inflation of 2% a year (its longer-run goals), a pace at which money loses half its value in about 35 years.

What is fiat money? How it works, and why it loses value →

What would happen if the US went back to the gold standard?

It would have to pick a price, and the arithmetic shows the problem. At $42.22 an ounce, the Treasury's gold covers 0.45% of the notes in circulation. To cover every note, each ounce would have to stand for about $9,300 of notes. To cover M2, the broad money supply that also counts bank deposits ($23.3 trillion in August 2026, Federal Reserve, H.6), it would be about $89,000. That is arithmetic, not a forecast of the gold price.

Whatever the price, the supply of dollars would again be tied to the supply of gold, and the Fed would lose much of its freedom to create money in a crisis. Supporters see that as the point: a discipline no committee can override. The economists polled on the question see it as the flaw. When the Clark Center asked its panel of 40 US economic experts in January 2012 whether a gold standard would give the average American better price stability and employment, none of the 37 who answered agreed, and 21 disagreed strongly (Clark Center).

A gold standard is also still a government's promise to redeem, and the United States has suspended that promise before: in 1934 for its own citizens and in 1971 for everyone else.

What this means if you hold dollars

A dollar note is a claim on the Fed that the Fed will meet with another note. Behind it stand government bonds, the government's power to tax, and the economy that pays the tax. Most dollars are not notes at all: currency held by the public was $2.4 trillion of the $23.3 trillion in M2 in August 2026 (Federal Reserve, H.6). The rest are mostly bank deposits: your bank's debt to you, backed by its loans and securities and insured by the FDIC up to $250,000 per depositor, per bank, per ownership category (FDIC).

None of that protects what a dollar buys. US consumer prices in August 2026 were 8.2 times their level in August 1971 (BLS). The backing explains why the dollar is accepted. It does not stop the supply from growing, and it does not stop each dollar from buying less.

Calculate what your money has lost: the fiat debasement calculator →

Where bitcoin fits

Bitcoin is not backed in the dollar's sense: no one owes you anything for it. It is no one's liability: there is no issuer to redeem it and no collateral behind it. What it has instead is a rule. The total can never exceed 21 million, a limit written into the software every full node runs, so no committee can change it.

That is a different answer to the question this page asks. The dollar is backed by claims and a promise, and its supply is a matter of policy. Bitcoin is backed by nothing you can claim, and its supply is fixed. It has costs of its own: its price swings widely, and few people price goods in it yet, so for most it is not a unit of account. But no one can create more of it to pay a debt.

What backs bitcoin? →

Questions people ask

What is US currency backed by?

Collateral the Federal Reserve must hold by law. On 23 September 2026, 98.9% of it was US Treasury, agency and mortgage-backed securities, and the rest gold certificates and special drawing rights certificates. In practice that means debt owed or guaranteed by the US government and its agencies, and behind it the government's power to tax.

How much gold does the United States own?

261.5 million troy ounces at the end of August 2026, worth $11.0 billion at the statutory $42.22 an ounce. That is a book value set in 1973, not a market price (US Treasury).

Can you exchange dollars for gold?

Not at the Fed or the Treasury. Notes have not been redeemable in gold since 1934 for Americans, or since 1971 for foreign governments. You can buy gold in the market with dollars, as you would anything else.

Is the dollar backed by oil?

No. Oil priced in dollars adds to the demand for dollars, but no one can hand in dollars and receive a fixed amount of oil.

Money 101: the reading list →

Sources

• The Federal Reserve: Federal Reserve, H.4.1 Factors Affecting Reserve Balances, 24 September 2026 (tables 5 and 7); Federal Reserve Board, Fed's balance sheet (a guide to the H.4.1 tables); Federal Reserve Board, Federal Reserve liabilities; Federal Reserve Banks, Combined Financial Statements 2025 (note 3, b and l); Federal Reserve, Is U.S. currency still backed by gold?; Federal Reserve, Is it legal for a business in the United States to refuse cash?.
• The law: 12 U.S.C. § 411 (Federal Reserve Act, section 16); 12 U.S.C. § 412 (collateral for Federal Reserve notes); 31 U.S.C. § 5117 (gold certificates); 31 U.S.C. § 5103 (legal tender).
• The Treasury: US Treasury, Fiscal Data, U.S. Treasury-Owned Gold; TreasuryDirect, About Treasury marketable securities; US Treasury, Monthly Treasury Statement, September 2025 (Table 1); US Treasury, Historical Debt Outstanding; IRS, Yearly average currency exchange rates.
• The dollar's record and role: BLS, CPI-U; Federal Reserve, H.6 Money Stock Measures; FDIC, Understanding deposit insurance; IMF, Currency Composition of Official Foreign Exchange Reserves (COFER); BIS, Triennial Central Bank Survey; Federal Reserve, longer-run goals.
• Gold and its end: Federal Reserve History, The Smithsonian Agreement; Office of the Historian, Nixon and the End of the Bretton Woods System; IMF, Silent Revolution, ch. 2; Clark Center Forum, Gold Standard (US Economic Experts Panel, 12 January 2012).