What Does Fiat Currency Mean?
Fiat currency is money issued or recognized by a government and monetary authority. It serves as a unit of account, payment method and means of settling debts in its jurisdiction. The Chinese yuan (CNY), US dollar (USD), euro (EUR) and Hong Kong dollar (HKD) are fiat currencies.
“Fiat” does not mean fake money. Its value rests largely on legal status, taxation, central-bank credibility and broad acceptance rather than a fixed right to redeem it for gold.
CNY, e-CNY, USD and USDT Compared
| Asset | Issuer or responsible system | Legal tender? | Main risks |
|---|---|---|---|
| CNY | China’s central-bank and banking system | Yes | Inflation, FX and bank-account risk |
| e-CNY | People’s Bank of China | Yes; digital CNY | Wallet rules, privacy and availability |
| USD | US monetary system | Yes | Inflation, FX and banking risk |
| USDT | Tether | No | Reserves, depegging, freezes and regulation |
| USDC | Circle | No | Reserve banks, freezes and regulation |
What Is a Fiat Transaction in Crypto?
A crypto platform’s “fiat,” “P2P” or “C2C” section generally covers conversion between legal tender and crypto assets. A licensed venue may directly accept a supported bank transfer, while a P2P marketplace matches users who pay each other through external payment rails.
Fiat Deposits, Crypto Deposits and Withdrawals
- Fiat deposit: moving supported government currency from a bank or payment rail into a regulated venue.
- Crypto deposit: sending BTC, ETH or USDT from an external wallet to a platform address.
- Fiat withdrawal: selling assets and sending supported currency to your own bank account.
- Onchain withdrawal: sending crypto to a self-custody wallet; this is not a fiat cash-out.
Why Is USDT Not the Same as USD?
USDT targets a value near one US dollar, but holders own a token issued by Tether—not a dollar deposit in their own US bank account. Liquidity, reserves, regulation, issuer actions and address freezes can affect it. Stablecoins reduce price volatility relative to BTC, but they are not risk-free cash.
Read next: Fiat and USDT beginner hub, on-ramps and off-ramps, and stablecoin basics.