What Is Tether (USDT)? How It Works, Use Cases and Risks
What is Tether? A plain-English guide to USDT: how the dollar stablecoin is issued and backed, what it is used for, its main risks and how to avoid fakes.
Tether (USDT) is a stablecoin — a cryptocurrency designed to keep a steady value of about one US dollar — issued by the company Tether, which says each token is backed by reserves such as cash, US Treasury bills and other assets. It is widely used by traders as a dollar substitute on crypto exchanges and as a way to move dollar value across blockchains quickly.
USDT matters because so much crypto trading is priced in it. If you have ever traded on a centralized exchange, you have likely seen pairs such as BTC/USDT. Understanding how it works, and where its risks lie, is basic knowledge for anyone holding crypto.
Origin and History
Tether launched in 2014, initially under the name Realcoin, with co-founders commonly listed as Brock Pierce, Reeve Collins and Craig Sellars. The first USDT tokens were issued on the Omni Layer, a protocol built on top of the Bitcoin blockchain.
Tether is linked to the crypto exchange Bitfinex through shared ownership and management. That relationship, together with questions about whether USDT was fully backed at all times, drew years of scrutiny. In 2021, Tether settled with the New York Attorney General and the US Commodity Futures Trading Commission over past statements about its reserves, paying penalties without admitting wrongdoing. Tether now publishes regular reserve attestations from an accounting firm on its website. If USDC is new to you, start with what USDC is and how it works.
How Tether Works
Tether is a fiat-backed stablecoin. The basic cycle is simple:
- 1A verified customer sends dollars to Tether.
- 2Tether issues the same number of USDT tokens to the customer's address.
- 3When a customer returns USDT to Tether, the tokens are taken out of circulation and the customer receives dollars, minus fees.
Most people never deal with Tether directly. They buy USDT on an exchange from other traders. The price stays near one dollar mainly through arbitrage: if USDT trades below a dollar, large customers can buy it cheaply and redeem it with Tether at full value, and if it trades above a dollar, they can mint new tokens and sell them.
USDT is not a blockchain of its own. It is a token issued on many networks, including Ethereum and Tron. Each version is a separate smart contract, and moving USDT between networks normally requires an exchange or bridge rather than a direct transfer. Our Worldcoin (WLD) explainer covers the project's basics, use cases and risks.
What USDT Is Used For
- Trading. Exchanges use USDT as a base currency, letting traders move in and out of positions without converting to bank money.
- Transfers. USDT can move between people and platforms around the clock, often faster than bank wires.
- Dollar access. In countries with high inflation or capital controls, some people use USDT as a way to hold dollar value.
- DeFi. USDT can be supplied to lending protocols and liquidity pools, although many DeFi apps favor other stablecoins.
Supply Design
USDT has no fixed maximum supply. Supply grows when customers deposit dollars and shrinks when they redeem, so the number of tokens in circulation reflects demand. There is no mining, staking reward or inflation schedule. You can see the current supply and price on our live Tether page.
Risks and Criticisms
USDT is widely used, but it carries real risks:
| Risk | What it means |
|---|---|
| Reserve risk | Your token is only as good as Tether's assets and its ability to pay redemptions. Reserves include assets beyond cash, and attestations are not the same as a full audit. |
| Counterparty risk | You rely on a single private company and its banking partners. |
| Regulatory risk | Stablecoin rules are tightening in many jurisdictions, which can affect where USDT is available or how it can be offered. |
| Freezing | Tether can freeze tokens at specific addresses, so USDT is not censorship-resistant. |
| Depeg risk | In market stress, USDT can trade below one dollar for a time. |
None of this means USDT is about to fail. It means a stablecoin is a claim on a company, not a dollar in an insured bank account. Our comparison of USDT vs USDC shows how two major issuers differ, and our guide to stablecoins explained covers the other designs.
How to Find the Official Contract and Avoid Fakes
Scammers create tokens named "Tether" or "USDT" and send them to wallets or list them on decentralized exchanges. To avoid them:
- 1Get USDT contract addresses from Tether's official website, tether.to, or from the coin page on a trusted data site, and compare the full address.
- 2Make sure the address matches the network you are using.
- 3Be suspicious of unexpected USDT that appears in your wallet; airdropped fakes are often used to lure you to phishing sites.
- 4Never buy "USDT" at a discount from a stranger or a peer-to-peer offer that seems too good.
Our step-by-step guide on how to confirm you have the real token contract covers the full process.
Bottom line
Tether is a dollar-pegged token issued by a private company and backed by its reserves. It is useful for trading and moving value quickly, but it depends on trust in Tether's assets, management and regulators, and the company can freeze tokens. Use it with that in mind, keep only what you need in any single stablecoin, and always check the contract address for the network you use.
Frequently asked questions
Is USDT always worth exactly one dollar?
USDT is designed to trade at about one US dollar, and it usually trades very close to that level. It is not guaranteed, though. During periods of market stress it has briefly traded below a dollar, and its value ultimately depends on Tether's reserves and on traders' confidence that tokens can be redeemed.
Who can redeem USDT for dollars?
Direct issuance and redemption with Tether is available only to verified customers who pass its onboarding checks and meet its minimum amounts and fees. Most individuals buy and sell USDT on exchanges instead, relying on traders and market makers who can redeem directly to keep the price near one dollar.
Can Tether freeze my USDT?
Yes. The USDT smart contracts include functions that let Tether freeze tokens held at specific addresses, and the company has used them, for example in response to law-enforcement requests linked to hacks or fraud. This is an important difference from decentralized assets such as bitcoin.
Which network should I use for USDT?
USDT exists on several blockchains, and each version has its own contract address. Use the network your exchange or wallet supports on both the sending and receiving side, and confirm the official contract address for that network, because sending on the wrong network can mean losing the funds.