USDT — issued by Tether — is the world's largest stablecoin and the most traded cryptocurrency by daily volume. Its value is pegged to the US dollar: 1 USDT is designed to be worth $1.00. Unlike Bitcoin or Ethereum, USDT is not meant to appreciate in value; it is designed to maintain price stability while offering the speed and portability of a crypto asset.

One of the most common points of confusion is that USDT exists on multiple blockchain networks simultaneously. Understanding the difference between TRC20, ERC20 and BEP20 is essential before sending or receiving USDT to avoid irreversible errors.

What USDT is and how it works

USDT is a fiat-collateralised stablecoin — Tether Ltd claims to hold reserves equivalent to the total USDT supply. It was first issued in 2014 and has grown to become the dominant stablecoin by circulation.

By Q1 2026, the total stablecoin market had reached a record $315 billion in circulation, with USDT accounting for the largest single share. Stablecoins made up approximately 75% of all crypto trading volume in Q1 2026, with USDT the most commonly used settlement asset.

The three main USDT networks: TRC20, ERC20 and BEP20

USDT TRC20 — TRON Network

TRC20 refers to USDT issued on the TRON blockchain. It is the most widely used USDT network by transaction volume because of its very low fees — often less than $1 per transaction — and fast confirmation times.

• Network: TRON

• Typical fees: under $1 per transaction

• Speed: typically 1–3 minutes

• Common use: P2P transfers, exchange deposits/withdrawals

USDT ERC20 — Ethereum Network

ERC20 refers to USDT issued on the Ethereum blockchain. It is the original and most widely supported USDT version — virtually every crypto platform accepts ERC20 USDT. However, Ethereum gas fees can be higher and more variable than TRON.

• Network: Ethereum

• Typical fees: variable, often $2–$20+ depending on network congestion

• Speed: 1–5 minutes under normal conditions

• Common use: DeFi protocols, most widely accepted by wallets and exchanges

USDT BEP20 — BNB Smart Chain

BEP20 refers to USDT issued on BNB Smart Chain. It combines relatively low fees with broad compatibility and is commonly used within the BNB ecosystem.

• Network: BNB Smart Chain

• Typical fees: low, typically under $0.50

• Speed: typically 1–3 minutes

• Common use: BNB ecosystem DeFi, exchanges supporting BSC

Why choosing the correct network matters — critical warning

USDT on TRC20, ERC20 and BEP20 are distinct assets on different blockchains. Sending USDT from one network to a wallet address on a different network will result in the loss of funds in most cases. The receiving platform or wallet must support the specific network you are sending on.

CRITICAL: Always confirm the network with the receiving party before sending USDT. If you are depositing to an exchange, go to that exchange's deposit page and check which USDT network they accept. Network mistakes are irreversible.

Which USDT network should you use?

• For low-cost transfers: TRC20 — the lowest fees of the three main networks

• For maximum compatibility with wallets and platforms: ERC20 — most widely supported

• For BNB Smart Chain DeFi: BEP20

• For deposits to a specific exchange: always check what network that exchange accepts before sending

Frequently Asked Questions

Is USDT actually backed by dollars?

Tether publishes periodic attestations claiming that USDT is backed by reserves. The composition of those reserves has evolved over time and has been a subject of regulatory scrutiny. Users should assess Tether's reserve disclosures independently.

Can I buy USDT on FastCoins?

Yes. FastCoins supports USDT on TRC20, ERC20 and BEP20 networks. When buying USDT, select the network you want to receive USDT on before confirming your order.

Is 1 USDT always worth exactly $1?

USDT is designed to maintain a 1:1 peg with the US dollar, but minor fluctuations occur on secondary markets. The peg has historically been maintained very close to $1.00, though brief deviations have occurred during periods of market stress.

FastCoins supports USDT on TRC20, ERC20 and BEP20. When buying or transferring USDT, always select the correct network to avoid permanent loss of funds.

→ Buy USDT on FastCoins — select your preferred network on the buy page.

This article is for informational purposes only and does not constitute financial advice, investment guidance or a recommendation to buy, sell or hold any digital asset. Cryptocurrency involves risk. Always conduct your own research before making financial decisions.