Key readings
- USDT is a stablecoin issued by Tether, designed to track the US dollar and backed by reserves the company reports on.
- The same token exists on several blockchains; Tron (TRC20, addresses start with T) and Ethereum (ERC20, addresses start with 0x) are the most familiar.
- Sender and receiver must use the same network, and each network charges its fee in its own coin.
What is USDT? It is a crypto token issued by the company Tether that aims to be worth one US dollar. Traders use it to hold a dollar-like balance inside the crypto system, to move value between platforms quickly and to price other coins. It behaves like a digital dollar most of the time, but it is not a bank deposit and it carries risks of its own.
How USDT keeps its value close to a dollar
Tether issues new USDT when approved customers send it dollars, and redeems tokens for dollars when they send USDT back. It holds reserve assets, mostly cash-like instruments, that it says match the tokens in circulation, and it publishes periodic reserve reports prepared by an accounting firm.
The redemption route is what holds the price near $1. If USDT trades at $0.99 on the market, firms that can redeem directly have a reason to buy it cheaply and hand it back for a full dollar. If it trades at $1.01, they can create new tokens and sell them. Most ordinary users cannot redeem directly, though; they rely on that arbitrage happening elsewhere.
Two things follow. First, the peg is only as strong as the reserves and the redemption process behind it. Second, a market price can drift from $1 during stress even if the reserves are sound, simply because sellers arrive faster than redemptions can be processed.
One token, several networks
USDT is not a blockchain of its own. Tether issues it as a token on several existing chains. On each chain it follows that chain's token standard, uses that chain's address format and pays fees in that chain's native coin.
| Network | Standard | Address format | Fee paid with |
|---|---|---|---|
| Tron | TRC20 | Starts with T | TRX, or energy and bandwidth obtained by staking TRX |
| Ethereum | ERC20 | Starts with 0x | ETH, as gas |
Tron has become a common route for USDT transfers because fees there are usually low compared with Ethereum. Ethereum is widely supported by decentralised applications and many wallets. Other chains carry USDT too, each with its own rules. Whatever the network, the token on one chain does not automatically appear on another; moving between them requires a platform or a bridge.
The network mismatch mistake
This is the single most common way beginners lose USDT. A platform's withdrawal screen asks you to choose a network. The receiving wallet or platform shows a deposit address for a specific network. If the two do not match, the transfer may fail, arrive somewhere the recipient cannot access, or be recoverable only through the receiving platform's manual process, if it offers one at all.
- On the receiving side, note which network the deposit address belongs to.
- On the sending side, select exactly that network. A
T…address means Tron; a0x…address usually means Ethereum or a compatible chain. - Copy and paste the address, then compare the full string, not only the ends.
- Send a small amount first and confirm it arrives.
- Keep a little TRX or ETH in a self-custody wallet so you can pay fees when you later move the USDT.
What a transfer costs
Two layers of cost apply. The blockchain charges a network fee for including the transaction. A platform may also charge its own withdrawal fee, which can be larger than the network fee and is usually a fixed amount per withdrawal.
An illustrative example: you withdraw 250 USDT from a platform that charges a fixed 1 USDT withdrawal fee on the network you pick. The recipient receives 249 USDT. On a 50 USDT withdrawal, the same fixed fee is 2% of the amount, which is why small, frequent withdrawals are relatively expensive. Check the fee screen before confirming; our guide to trading fees covers the other costs.
What is USDT used for?
- Trading pairs: many crypto platforms price coins in USDT, as in BTC/USDT.
- Moving between platforms: a stablecoin transfer can arrive in minutes, at any hour.
- Holding a dollar-like balance: people in places with weak currencies or limited banking access use it to hold dollar value.
- Peer-to-peer payments: which is also why USDT is popular with scammers, who often ask victims to pay in it.
The risks to weigh
- Issuer and reserve risk. You depend on Tether holding adequate, accessible reserves. A reserve report is a snapshot, not a guarantee.
- De-peg risk. If the market price slipped to $0.97, a 1,000 USDT balance would be worth about $970 at that moment, a 3% loss even though nothing changed on your screen's token count.
- Freezing. The issuer can freeze tokens at specific addresses, for example at the request of law enforcement. That helps against theft but means USDT is not beyond anyone's control.
- No deposit protection. A USDT balance is not covered by bank deposit insurance.
- Regulatory change. Stablecoin rules are developing in many jurisdictions and can affect which platforms list a given token.
- Operational mistakes. Wrong network, wrong address and poisoned addresses are all irreversible in most cases.
How USDT compares with other stablecoin designs
Stablecoins fall into three broad groups. Fiat-backed tokens such as USDT hold reserves of cash and short-term assets off-chain and depend on the issuer's honesty and solvency. Crypto-collateralised stablecoins lock up more crypto than the value they issue, on-chain, and rely on automatic liquidations if the collateral falls. Algorithmic designs try to hold a peg through supply rules alone, and some have collapsed completely. Each design swaps one set of risks for another; none removes risk altogether.
USDT and scams
Because transfers are fast and hard to reverse, USDT features in many fraud patterns: fake investment platforms that show growing balances but block withdrawals, "task" jobs that ask for deposits, and romance scams that move to investing. If someone you have not met asks you to send USDT to unlock a profit, a withdrawal or a job, stop. Read how to spot trading scams for the full list.
Related reading
For the bigger picture on coins, tokens and wallets, see how crypto works. For the asset USDT is most often traded against, see what is Bitcoin.
Reader questions
Is USDT the same as a US dollar?
No. It is a token designed to track the dollar and backed by the issuer's reserves. It is not legal tender, not a bank deposit and not covered by deposit insurance.
Which is better, TRC20 or ERC20?
Neither is better in general. Use the network the recipient supports. Tron transfers are usually cheaper; Ethereum is supported by more applications. The only wrong choice is a mismatch.
Why do I need TRX to send USDT on Tron?
Tron charges transaction fees in network resources that come from TRX. Without TRX, or energy obtained by staking it, a USDT transfer on Tron cannot be paid for.
Sources
- Tether, published reserve reports and transparency page
- Tron network documentation on energy and bandwidth
- Ethereum documentation on gas fees and the ERC20 standard