USDT Explained: Networks, Uses & Risks

What is USDT? It is a stablecoin: a crypto token designed to trade at one US dollar. It is issued by Tether, a private company, which creates new tokens when approved customers deliver dollars or equivalent assets, and destroys tokens when they redeem. Because it moves on blockchains, it can be sent across the world at any hour, which is why it has become the main unit of account on many crypto exchanges.

What is USDT backed by, and how does it hold $1?

The peg rests on two things. First, reserves: Tether publishes regular reports, reviewed by an accounting firm, describing the assets it says back the tokens in circulation, largely short-term US government debt and cash-like holdings. Second, arbitrage: if USDT trades below one dollar on the market, eligible customers can buy it cheaply and redeem it with Tether for a full dollar, which pushes the price back up; if it trades above a dollar, new tokens can be created and sold.

Ordinary users cannot usually redeem directly with Tether, so for most people the price they get depends on the exchange where they sell. In calm markets USDT trades very close to $1. In stressed markets it has briefly traded below, and there is no guarantee that would not happen again.

Networks: TRC20, ERC20 and others

USDT is issued on several blockchains. The token is the same in value, but each version lives only on its own network. The two most widely used are:

The rule that matters: the sending and receiving network must match. If a platform shows you a deposit address for USDT on Tron, sending from Ethereum will not work and may lose the funds. Many exchanges show a network selector on the withdrawal screen; take a moment to check it every time, and send a small test amount to a new address.

Note also that you need a little of the network's own coin, such as TRX or ETH, in a self-custody wallet to pay the fee when you send USDT from it.

What people use USDT for

• Trading: most crypto pairs on large exchanges are quoted against USDT, so it acts as the cash leg of a trade.
• Parking value: traders sell volatile coins into USDT to step aside from price swings without leaving the exchange.
• Transfers: sending dollar value between people or platforms quickly, including across borders.
• Payments: some merchants and freelancers accept it, although local rules and tax treatment vary.

Worked example (illustrative figures)

You hold 1,000 USDT. If it briefly trades at $0.98 on the exchange where you need to sell, your holding is worth 1,000 × $0.98 = $980 at that moment. If you then withdraw 50 USDT with a flat 1 USDT fee, that fee is 2% of the amount sent. Small, frequent transfers can cost far more in percentage terms than one larger one.

The risks of holding USDT

• Issuer risk: you rely on Tether's reserves being sufficient, liquid and properly managed. Reserve reports describe assets at a point in time; they are not a guarantee.
• Freezing: the token contracts let the issuer freeze USDT at specific addresses, which it has done in response to law enforcement requests. Funds received from a sanctioned or criminal source can become unusable.
• No deposit protection: USDT is not a bank deposit, so government deposit-insurance schemes do not apply.
• Platform risk: USDT held on an exchange is exposed to that exchange's solvency as well.
• Regulatory change: rules on stablecoins are evolving, and some regulated platforms restrict which stablecoins they offer to customers in certain regions.

Sending USDT safely: a checklist

1. Ask the recipient for the network as well as the address. "Send it to this address" is not enough; confirm whether they expect TRC20, ERC20 or another network.
2. Compare the address format. A Tron address starts with T; an Ethereum address starts with 0x. If the format does not match the network you selected, stop.
3. Check the whole address, not only the first and last few characters. Look-alike addresses are created precisely to pass a quick glance.
4. Send a small test amount first to any new address, and wait for the recipient to confirm it arrived.
5. Check the fee before confirming. On a self-custody wallet, make sure you hold enough TRX or ETH to cover it, or the transfer will fail.
6. Keep the transaction ID. It lets you or the recipient look up the transfer on a public block explorer if anything goes wrong.

Buying and selling USDT

Most people get USDT by buying it on an exchange with their local currency, or by selling another coin into it. The price you pay may include a small premium or discount to $1, plus the platform's trading fee or spread. Converting back to a bank balance means selling the USDT for local currency and withdrawing, which brings its own fees and identity checks.

Peer-to-peer markets, where individuals trade USDT for bank transfers, are widely used in some countries but carry specific risks: the buyer may reverse a payment after receiving the coins, or the money you receive may come from a fraud, which can lead to your bank account being frozen. If you use them at all, use a platform with escrow and only deal in your own name.

USDT and other dollar stablecoins

Other dollar stablecoins exist, issued by different companies with different reserve policies, reporting and regulatory status. They are not interchangeable in risk even if each trades near $1. If you hold stablecoins for any length of time, read the issuer's own reserve reports and redemption terms, and consider whether you need a stablecoin at all or would be better holding dollars in a regulated account.

For the wider picture, see how crypto works, and compare platform withdrawal fees with our fee guide.

Sources

• Tether, published reserve reports and terms of service
• Tron and Ethereum network documentation