Fiat currency is legal tender whose value rests on the issuing government's authority and the confidence of those who use it, rather than on convertibility into a commodity such as gold or silver. The term comes from the Latin fiat, meaning "let it be done." Central banks control the supply of fiat money through monetary policy tools including interest rates, reserve requirements, and open market operations.
Most modern economies operate on fiat systems. The shift away from commodity-backed money accelerated after World War II under the Bretton Woods system (1944), which pegged major currencies to the U.S. dollar, itself convertible to gold at $35 per ounce. That arrangement ended on 15 August 1971, when U.S. President Richard Nixon suspended the dollar's convertibility into gold — an event often called the "Nixon Shock." By 1973, the major industrial economies had moved to floating exchange rates among pure fiat currencies.
Key features of fiat currency include:
- Legal tender status: creditors are generally required by law to accept it for debts.
- Elastic supply: central banks can expand or contract the money stock in response to economic conditions.
- No intrinsic value: the physical note or digital balance is worth only what counterparties will exchange for it.
The principal advantage is policy flexibility — governments can respond to recessions, financial crises, or wars without being constrained by gold reserves. The principal risk is inflation or, in extreme cases, hyperinflation, as seen in Weimar Germany (1921–1923), Zimbabwe in the late 2000s, and Venezuela in the 2010s. Loss of confidence in the issuer can collapse a fiat currency's purchasing power rapidly.
For IR researchers, fiat currency is central to debates over dollar hegemony, sanctions enforcement (which relies on access to dollar clearing systems), reserve currency composition tracked by the IMF's COFER data, and proposals for central bank digital currencies (CBDCs) and alternative settlement arrangements such as those discussed within the BRICS grouping.
Example
After Nixon suspended dollar-gold convertibility on 15 August 1971, the U.S. dollar effectively became a pure fiat currency, and other major economies followed by 1973.
Frequently asked questions
Under a gold standard, currency is convertible into a fixed quantity of gold, constraining money supply. Fiat currency has no such backing; supply is managed by the central bank.
Keep learning