USDT is a cryptocurrency designed to be worth exactly one US dollar at all times. Unlike Bitcoin or Ethereum, whose prices swing by the hour, USDT exists so people can hold, send, and trade a dollar-denominated token on a blockchain without leaving the crypto world. AXL Research Hub put this guide together to walk you through how USDT actually works, what backs it, where the risks sit, and how to buy, store, or cash it out.
What is USDT?
USDT, commonly called Tether, is a fiat-backed stablecoin where each token represents a claim on reserves held by Tether Limited. The company sells USDT tokens for US dollars, holds those dollars (and dollar-equivalent assets) in reserve, and promises to redeem any token at $1. That structure makes it fundamentally different from algorithmic stablecoins, which try to hold a peg through code-driven supply adjustments rather than actual asset reserves.
Tether launched in July 2014 under the name Realcoin, founded by Brock Pierce, Reeve Collins, and Craig Sellars. It was renamed Tether in November 2014, and the first tokens were issued on Bitcoin’s Omni Layer on October 6, 2014. Since then it has expanded to run on many blockchains. Tether Limited is owned by iFinex, a company incorporated in the British Virgin Islands.
The scale of USDT is hard to overstate. Its circulating supply reached approximately $189 billion, having passed the $100 billion mark in May 2024. It surpassed Bitcoin in daily trading volume in 2019 and held roughly 70% of the stablecoin market share. As of July 2024, Tether reported approximately 350 million users worldwide.
How does USDT maintain its peg to the US dollar?
The peg works through a straightforward issue-and-redeem loop. Tether Limited sells USDT tokens to buyers at $1 each, deposits those dollars into its reserves, and stands ready to buy tokens back at $1 when holders want out. Each USDT targets a value of $1 USD at all times.
The mechanism that keeps the price close to $1 on exchanges is arbitrage. If USDT drops below $1 on the open market, traders can buy discounted tokens and redeem them directly with Tether at par, pocketing the difference. That buying pressure pushes the price back up. The reverse happens when USDT trades above $1: fresh tokens are issued to meet demand, increasing supply until the price settles.
Verified institutional holders can redeem USDT for USD at a 1:1 ratio through Tether’s authorized redemption process, a structure that differs from USDC’s, as our USDC versus USDT comparison explains. When tokens are redeemed for fiat, those USDT are destroyed and permanently removed from circulation. This burn mechanism keeps circulating supply in line with actual reserves.
One thing worth understanding clearly: USDT’s peg stability rests on a company promise and market confidence. There’s no government guarantee behind it, and no coded algorithm enforcing the price. If trust in Tether’s reserves or its willingness to process redemptions ever broke down, the peg could slip, and it has slipped temporarily in the past.
What backs USDT: reserves and transparency
Tether’s reserves consist primarily of US Treasury bills, making the company one of the largest holders of US government debt globally. Beyond Treasuries, the reserve portfolio includes Bitcoin, gold, cash equivalents, and receivables from loans to third parties. As of August 1, 2024, Tether reported $118.4 billion in reserves and $5.3 billion in excess reserves above what was needed to cover outstanding tokens. The company disclosed $11.9 billion in net equity as of mid-2024 and reported $5.2 billion in total profit for the first half of 2024, with Q1 2024 profit of $4.52 billion driven heavily by returns on its Treasury holdings.
To address transparency concerns, Tether publishes quarterly attestations performed by BDO, an international accounting firm. These attestations confirm that reserves meet or exceed the outstanding token supply on a specific date. Tether’s transparency page also provides daily updates on tokens in circulation and regular data on reserves across supported networks.
The distinction between an attestation and a full audit matters here. An attestation is a point-in-time snapshot: it confirms that on one particular date, the numbers checked out. It doesn’t examine broader financial controls, cash flows, or operations over a period of time the way a continuous audit would. Tether has never completed a full independent audit, despite stating intentions to pursue one since at least 2017. That gap means there’s no independent verification of what happens between reporting dates, which is a recurring point of criticism.
Blockchains USDT runs on: ERC-20, TRC-20, and more
The same dollar claim exists as a token on multiple blockchains, and Tether listed fourteen protocols and blockchains on its website as of January 2024. Most of the circulating supply sits on two networks: Tron (TRC-20 tokens) and Ethereum (ERC-20 tokens). The remaining supply is spread across Solana (SPL), Polygon, Algorand, Avalanche, Tezos, EOS, TON, Celo, the Liquid Network, and others.
Each network has its own address format. Ethereum addresses are 42 characters long and start with “0x.” Tron addresses start with “T.” These differences matter because transaction fees vary across networks, sometimes enough to eat into small transfers. Lower-fee networks like Tron and Solana can save real money on routine sends, while Ethereum gas fees can spike during congestion.
Why network choice matters when sending USDT
Every exchange and wallet asks which network to use when you withdraw or send USDT. Overlooking this step is the most common costly mistake beginners make. If you send USDT on a network that doesn’t match the receiving wallet, those coins may be permanently unrecoverable. There’s no customer service number to call for a blockchain transaction.
Counterfeit tokens are another risk to keep in mind. Anyone can mint a token called “USDT” on a low-cost chain for almost nothing, and scammers distribute these fakes as payments or airdrops. The only reliable protection is verifying the genuine contract address on a network that Tether actually issues on.
Before confirming any USDT transfer, check three things: make sure the network matches on both the sending and receiving side, verify the contract address is the legitimate Tether-issued one, and compare at least the first and last four characters of the wallet address before hitting send.
USDT vs USD: key differences
| Feature | USD | USDT |
|---|---|---|
| Issuer | US government (Federal Reserve) | Tether Limited (private company) |
| Deposit insurance | FDIC-insured in US bank accounts | None |
| Price stability | 1 USD is always 100 cents | 1 USDT can fluctuate slightly above or below $1 |
| Form | Physical cash and electronic bank balances | Digital tokens on blockchains only |
| Supply management | Federal Reserve | Tether Limited mints or burns tokens based on deposits and redemptions |
| Spending acceptance | Any merchant | Limited outside crypto, growing through crypto-friendly payment services |
| Inflation exposure | Subject to dollar inflation | Also subject to dollar inflation, since the peg tracks the dollar’s purchasing power |
Both USD and USDT are affected by dollar inflation. USDT’s nominal peg to $1 holds, but its real purchasing power tracks whatever happens to the underlying dollar. Holding USDT doesn’t protect you from inflation any more than holding a dollar bill does.
What is USDT used for?
USDT fills several roles across crypto and beyond, and its dominance as a stablecoin means most participants encounter it regularly.
- Parking value between trades. Traders move into USDT during periods of volatility to hold stable value on-chain without converting back to fiat. This avoids the fees and delays of cashing out to a bank account just to re-enter a position later.
- Trading pairs. Most crypto exchanges quote major assets like BTC and ETH against USDT, making it the dominant quote currency. If you’re trading crypto, you’re almost certainly interacting with USDT pairs.
- Moving funds between exchanges. Sending USDT from one exchange to another is faster than wiring fiat, which makes it a practical tool for capturing arbitrage opportunities across platforms.
- Cross-border transfers. Sending USDT internationally can be faster and cheaper than a traditional bank wire, particularly for transfers to countries with limited banking infrastructure.
- Store of value in unstable economies. In countries with high inflation or currency controls, holding USDT works as a pocket dollar. It’s accessible through a phone and doesn’t require a US bank account.
- DeFi participation. Decentralized finance protocols and decentralized exchanges typically don’t accept direct fiat deposits. USDT serves as the on-ramp for lending, borrowing, and providing liquidity in these systems.
- Forex-style speculation. Some users buy USDT when their local currency is strong against the dollar, then convert back when conditions shift, effectively making a bet on exchange rate movements.
- Merchant payments. A growing number of businesses accept USDT, though direct retail adoption remains limited compared to card networks and bank transfers.
Risks of holding USDT
USDT is not a risk-free equivalent of a dollar. Anyone holding a meaningful amount should understand these exposures.
- Counterparty risk. You’re depending entirely on Tether Limited’s solvency and willingness to honor redemptions. If the company faced financial difficulty, that could directly affect the peg and your ability to convert tokens back to dollars.
- Reserve transparency gaps. The quarterly attestations by BDO are snapshots of a single date, not continuous monitoring. Between reporting dates, there’s no independent verification of what’s happening with the reserves.
- Regulatory exposure. Stablecoin regulations are evolving quickly worldwide. Jurisdictions can restrict or outright ban USDT, as happened under MiCA in the European Economic Area in early 2025, where exchanges delisted USDT to comply with the new rules. Future regulatory changes in other regions could similarly limit access.
- Price deviation. USDT has historically traded as high as $1.20 and as low as $0.88. It fell to approximately $0.88 on October 15, 2018 amid perceived credit risk, and dipped to about $0.95 on May 12, 2022 during the TerraUSD collapse. Both times it recovered, but the temporary depegs during market stress show the price isn’t truly fixed.
- Centralization. Unlike decentralized cryptocurrencies, USDT depends on a single private issuer. Tether can freeze addresses, comply with government orders, or make unilateral decisions that affect token holders.
- No deposit insurance. Unlike US bank deposits protected by the FDIC, USDT balances carry no government backstop anywhere. If something goes wrong, there’s no insurance fund to make you whole.
Tether’s regulatory history and legal record
Tether has faced significant regulatory scrutiny since its early years, and the outcomes are documented.
In February 2021, Tether settled with the New York Attorney General (NYAG) for $18.5 million over past statements about its reserves. Tether admitted no wrongdoing as part of the settlement but was barred from operating in New York. The investigation had focused on whether Tether misrepresented how fully its tokens were backed by fiat currency.
In October 2021, the Commodity Futures Trading Commission (CFTC) fined Tether $41 million over reserve statements made between 2016 and 2018. The CFTC’s findings were stark: Tether had maintained full dollar-for-dollar reserves during only 27.6% of the days in that period. For the majority of the time, the tokens in circulation were not fully backed by the assets Tether claimed to hold.
In July 2022, Tether began publishing quarterly attestations by BDO Italia, a step taken to address the ongoing transparency criticism that followed these enforcement actions.
The regulatory picture shifted significantly in July 2025 when the GENIUS Act was signed into US law. This legislation establishes a federal framework for payment stablecoins, requiring issuers to maintain 1:1 reserve backing with high-quality liquid assets and submit monthly attestations from PCAOB-registered accounting firms. The monthly cadence and the requirement for PCAOB-registered firms represent a higher standard than Tether’s existing quarterly BDO attestations.
Tether responded to the GENIUS Act in January 2026 by launching USAT, a US-regulated stablecoin entity operated through Anchorage Digital Bank. USAT is designed specifically for American users under the new federal framework. The core USDT token, however, is issued outside the US and is not directly subject to the GENIUS Act’s requirements. That distinction matters: Tether now operates two tracks, one domestic and regulated, one offshore and operating under its existing structure. How regulators in other jurisdictions respond to this arrangement is still playing out.
Reserve-backed vs algorithmic stablecoins
Reserve-backed stablecoins like USDT hold external assets, such as cash, Treasury bills, and gold, to support the peg. When holders want out, they can redeem tokens for those underlying assets. The peg holds because there’s something concrete behind it.
Algorithmic stablecoins take a completely different approach. They use code-driven supply adjustments, typically minting and burning paired tokens, to target a price without holding any external collateral. The idea is that the algorithm can expand or contract supply fast enough to keep the price stable.
The TerraUSD (UST) collapse in May 2022 showed what happens when that idea fails under pressure. TerraUSD lost its peg entirely and never recovered, wiping out tens of billions of dollars in value. The algorithmic mechanism couldn’t absorb the selling pressure, and once confidence broke, the death spiral accelerated.
USDT bent during that same event, dipping to about $0.95, but it returned to $1 within days as its redemption mechanism cleared. Traders who bought discounted USDT and redeemed through Tether at par helped push the price back. That recovery path, the ability to turn tokens in for actual dollars from actual reserves, is exactly what algorithmic designs lack. There’s no reserve vault to open when the algorithm breaks.
For anyone deciding which stablecoin to hold, understanding the peg mechanism underneath it is the first question to answer. A reserve-backed stablecoin still carries counterparty risk (you’re trusting the issuer), but it has a recovery path that a purely algorithmic token doesn’t.
How to buy, sell, or convert USDT to cash
Buying USDT and converting it back to fiat are straightforward processes, but each step has details that affect what you pay and whether your funds arrive safely.
- Choose a platform that lists USDT in your region. Availability varies by jurisdiction. EU-based users may face restrictions under MiCA, which led to USDT delistings on several European exchanges in early 2025. US-based users have broad access through major exchanges.
- Complete identity verification (KYC). On your first use of any regulated exchange, you’ll need to verify your identity with a government-issued ID and, in many cases, a selfie. This is a one-time step.
- Select USDT and pick the correct blockchain network. This is the step most beginners rush through. The network you select must match the network your destination wallet supports. If you’re buying to hold on the exchange itself, this choice comes later when you withdraw.
- Fund the purchase. You can pay by card or bank transfer. Card purchases settle faster but typically carry roughly 3-5% in total fees. Bank transfers are cheaper, with fees closer to 1%, making them more practical for larger amounts.
- Confirm the wallet address carefully. Before sending, verify that the opening and closing characters of the destination address match what you intended. One wrong character means lost funds.
To convert USDT back to cash, the process runs in reverse: sell your USDT on an exchange for fiat currency (USD, EUR, or whatever your local currency is), then withdraw the fiat to a linked bank account (if your USDT sits in a mobile wallet, see cash out from Trust Wallet). Withdrawal times vary by platform and payment method, but bank transfers typically take one to three business days.
Peer-to-peer (P2P) platforms offer another route to cash out. You trade directly with another person, which can sometimes offer better rates or access in regions with limited exchange coverage. The tradeoff is counterparty risk: you’re trusting the other party to complete their side of the deal, and disputes can be harder to resolve than on a centralized exchange.
Before buying USDT, it’s worth considering whether a private company’s dollar token actually suits your need better than holding actual dollars in a bank account. If you don’t need to move value on a blockchain or interact with crypto markets, a regular bank balance gives you FDIC insurance and none of the counterparty risk.
How to store USDT safely
Where you keep your USDT depends on how you use it and how much risk you’re comfortable with.
Exchange wallets are the most convenient option if you’re actively trading. Your USDT sits on the exchange, ready to deploy into a trade at any moment. The downside is platform risk: if the exchange gets hacked, goes bankrupt, or freezes withdrawals, your funds are stuck. You don’t control the private keys.
Mobile and software wallets put you in control of your own private keys by storing your USDT in an app on your phone or computer that only you can access. Because they combine the convenience of quick access with independence from any exchange’s solvency, they’re a reasonable choice for moderate holdings.
Hardware wallets, sometimes called cold storage, are the most secure option for larger amounts. Devices like the Ledger store your private keys offline, which means they’re not exposed to internet-based attacks, and transferring crypto to a cold wallet this way takes only a few steps. You connect the device to your computer or phone only when you need to sign a transaction.
Regardless of which storage method you choose, always match the wallet’s supported network to the USDT network version you’re receiving. Sending ERC-20 USDT to a wallet that only supports TRC-20 can result in lost funds.
One final rule that applies everywhere: never share your seed phrase with anyone claiming to verify your tokens, check your balance, or troubleshoot an issue. No legitimate service will ever ask for your seed phrase. Anyone who does is trying to steal your funds.
Frequently asked questions about USDT
Is USDT the same as a dollar?
No. A dollar in a US bank account is backed by the full faith and credit of the US government and protected by FDIC deposit insurance. USDT is a token issued by a private company, Tether Limited, that targets a $1 value and is redeemable against company-held reserves. There’s no government backstop if something goes wrong.
How much is $100 USD in USDT?
At par, $100 equals 100 USDT. In practice, the exchange rate on any given platform fluctuates by fractions of a cent, so you might receive 99.98 or 100.02 USDT depending on the moment you buy.
Does USDT have deposit insurance like a bank account?
No. USDT carries no FDIC or equivalent deposit protection anywhere in the world. Your holdings are only as secure as Tether Limited’s reserves and operations.
Has USDT ever lost its peg?
Yes, briefly, on more than one occasion: the October 2018 credit-risk scare pushed it to roughly $0.88, and the May 2022 TerraUSD collapse took it to about $0.95. It recovered within days each time, but the peg isn’t ironclad under stress.
Are Tether’s reserves audited?
Not in the full sense. What Tether releases each quarter is an attestation from the accounting firm BDO: a snapshot showing that reserves covered the tokens in circulation on one particular date. A comprehensive independent audit, which would test controls and cash flows over a period of time, has never been completed despite years of stated intentions.
What is the difference between ERC-20 and TRC-20 USDT?
They represent the same dollar claim but run on different blockchains. ERC-20 USDT runs on Ethereum, and TRC-20 USDT runs on Tron. Fees, transaction speeds, and wallet addresses differ between them. The critical thing to remember is that sending USDT on one network to a wallet that expects the other can result in permanent loss of those coins. Always confirm the network matches on both ends.
USDT’s role in the evolving stablecoin landscape
Stablecoin regulation is tightening on two major fronts. In the US, the GENIUS Act has turned reserve quality and monthly third-party reporting from voluntary practices into legal requirements for payment stablecoin issuers. In Europe, MiCA has already reshaped access, pushing exchanges to delist tokens that don’t meet its compliance standards.
To navigate these tightening rules, Tether launched USAT in January 2026 through Anchorage Digital Bank, giving American users a US-regulated option while core USDT continues to operate from outside the US for the rest of the world. This two-track approach lets Tether maintain its global footprint while meeting domestic requirements where they apply.
The composition of Tether’s reserves has also evolved. The company eliminated commercial paper holdings entirely in October 2022 and shifted primarily into US Treasury bills, a move that reduced credit risk in the reserve portfolio and addressed one of the market’s longest-running concerns.
Competition from other dollar stablecoins continues to push the broader market toward higher transparency standards and different reserve profiles. For holders, the practical takeaway at AXL Research Hub is straightforward: concentrating all your stablecoin exposure in a single issuer, whether that’s Tether or anyone else, means your risk is tied to one company’s operations and one regulatory outcome. Spreading across issuers reduces that single-point-of-failure exposure, even if no individual stablecoin is risk-free.
