USDT vs USDC: Which Stablecoin Is Safer?

USDT vs USDC comes down to a trade-off between size and transparency. Tether’s USDT is the largest and most widely traded dollar stablecoin, while Circle’s USDC is smaller but more tightly regulated in the US and EU and publishes more frequent reserve reports. Neither is risk-free, and each has lost its $1 peg at least briefly.

Both tokens aim to be worth exactly $1, both are backed mainly by US Treasury bills and cash-like assets, and both can be sent across many blockchains in minutes. The differences are in who issues them, what else sits in the reserves, how often outsiders check those reserves, which regulators supervise them, and how each has behaved under stress.

This guide compares USDT and USDC point by point, works through what a depeg and a redemption actually cost in dollars, and explains why “which is safer” depends on the risk you care about most. If stablecoins are new to you, start with our explainer on what a stablecoin is and how it works.

USDT vs USDC at a glance

Here is the short version before the detail. Figures that change are dated; check the issuers’ transparency pages for live numbers.

Who issues USDT and USDC?

Tether and USDT

USDT launched in 2014 and is issued by Tether, a company closely linked to the crypto exchange Bitfinex. In 2025 Tether moved its headquarters and main issuing entity to El Salvador, where it holds a stablecoin license. It is the most traded crypto asset by daily volume.

Tether is privately held and highly profitable, because it earns interest on the Treasuries backing the tokens while paying holders nothing. Its history includes legal settlements: in 2021 the New York Attorney General settled with Tether and Bitfinex for $18.5 million over claims about reserves, and the US Commodity Futures Trading Commission (CFTC) fined Tether $41 million for misstating that USDT was fully backed by dollars at all times.

Circle and USDC

USDC launched in 2018, originally through a consortium of Circle and Coinbase; Circle now issues it alone. Circle is a US company that went public on the New York Stock Exchange in June 2025, which means it files audited financial statements with the SEC. In the EU, USDC is issued through Circle’s French subsidiary, which holds an electronic money institution (EMI) license.

Both companies can freeze tokens held at specific addresses, usually at the request of law enforcement, so neither coin offers the censorship resistance of bitcoin.

Reserves: what backs each token?

A stablecoin is only as good as its reserves, the pool of assets the issuer holds to pay $1 for each token. Both issuers say their reserves exceed the tokens in circulation, but the mix is different.

USDT reserves

According to Tether’s attestation for June 30, 2026, it held about $187.8 billion of assets against about $183.6 billion of liabilities, an excess of roughly $4.1 billion. The largest pieces were about $115 billion of US Treasury bills and about $25.6 billion of reverse repurchase agreements (short loans backed by Treasuries). The rest included roughly $18.8 billion of physical gold, close to 99,000 bitcoin, secured loans and other investments.

Treasuries are about as safe and liquid as assets get. Gold, bitcoin and loans are not: their value can fall, and they can be slower to sell in a rush. That is the main reason ratings firm S&P Global lowered its stablecoin stability assessment of USDT to 5 (“weak”), the lowest score on its scale, in November 2025, citing rising exposure to higher-risk assets and gaps in disclosure.

USDC reserves

Circle keeps most USDC reserves in the Circle Reserve Fund, an SEC-registered government money market fund managed by BlackRock that holds short-dated Treasuries and Treasury repos. The rest sits as cash at a group of banks. There is no gold, bitcoin or corporate lending in the reserve. S&P has rated USDC 2 (“strong”) on the same five-point scale.

The cash portion is USDC’s weak spot, as March 2023 showed. Cash in a bank is only as safe as the bank, and large deposits far exceed the $250,000 FDIC insurance limit per depositor per bank.

Attestations vs audits: how much can you verify?

An attestation is a report in which an accounting firm checks the issuer’s statement of reserves at one moment in time, usually the last day of a month or quarter. An audit is broader: the auditor examines the full financial statements, internal controls and transactions over a whole year. Attestations are useful but narrower, because assets could look different on other days.

• USDC: Circle publishes monthly reserve attestations by Deloitte, and the Circle Reserve Fund reports its holdings publicly. As a listed company, Circle also has annual audited financial statements.
• USDT: Tether has published quarterly attestations, prepared by BDO since 2022. In August 2026 it published its first full audit, a KPMG opinion on its 2025 financial statements, which reported reserves exceeding liabilities by about $6.8 billion at the end of 2025. That closes a long-standing criticism, although quarterly snapshots remain less frequent than Circle’s monthly reports.

Regulation: MiCA in the EU and the GENIUS Act in the US

European Union (MiCA)

The EU’s Markets in Crypto-Assets Regulation (MiCA) started applying to stablecoins on June 30, 2024. Under MiCA, a dollar stablecoin offered to the public in the EU must be an authorized e-money token, with rules on reserve quality, a large share of reserves held as deposits at EU banks, and a right for every holder to redeem at par without fees.

Circle obtained its French EMI license in July 2024, so USDC (and its euro coin, EURC) are MiCA-compliant. Tether chose not to seek authorization for USDT. Regulated exchanges and brokers in the European Economic Area (EEA) have therefore stopped offering USDT to EU customers, a process that ran from late 2024 through the end of MiCA’s transition period for crypto firms on July 1, 2026. Holding USDT in your own wallet is not illegal, but buying, trading and converting it on regulated EU platforms is no longer available.

United States (GENIUS Act)

The GENIUS Act was signed into law on July 18, 2025. It creates a federal framework for “payment stablecoins”: issuers must hold 1:1 reserves in cash, Treasuries and similar safe assets, publish monthly reserve reports examined by an accounting firm, and be licensed by a federal or state regulator. The law takes effect on the earlier of January 18, 2027 or 120 days after regulators finalize their rules. The Office of the Comptroller of the Currency (OCC) issued its main final rule on October 21, 2026, effective January 18, 2027.

Circle has positioned USDC to comply and received final OCC approval for a national trust bank in July 2026. Tether took a different route: rather than reshape USDT, it launched a separate US-regulated token, USAT, issued by Anchorage Digital Bank, in January 2026. USDT continues to serve markets outside the US. How US platforms treat USDT once the law takes effect is still being worked out, so check your exchange’s notices. Rules differ by country, and the UK, Singapore, Hong Kong and others have their own stablecoin regimes.

Depeg history: USDT vs USDC under stress

A depeg happens when a stablecoin trades meaningfully away from $1. Both coins have done it, for different reasons.

USDT in May 2022

When the algorithmic stablecoin TerraUSD collapsed in May 2022, panic spread to other stablecoins. USDT briefly traded around $0.95 on some exchanges as holders rushed for the exit. Tether processed several billion dollars of redemptions over the following weeks and the price returned to $1 within days.

USDC in March 2023

On Friday, March 10, 2023, Silicon Valley Bank (SVB) failed. Circle disclosed that $3.3 billion of USDC’s roughly $40 billion of reserves was held there. Over the weekend, with banks closed and redemptions paused, USDC fell to about $0.87 on exchanges. On Sunday, US authorities guaranteed all SVB deposits, and USDC was back near $1 by Monday.

Chains supported and network fees

Both stablecoins are tokens on public blockchains, so you can hold them in any compatible crypto wallet. What you pay to move them depends on the blockchain, not the issuer.

• USDT is heavily used on Tron and Ethereum, and is also issued on Solana, TON, Avalanche and several others. Tether has retired support on some older networks such as Omni, Kusama and EOS, so old tokens on those chains may no longer be redeemable.
• USDC is issued natively on more than 20 blockchains, including Ethereum, Solana, Base, Arbitrum, Avalanche, Polygon and Stellar. Circle discontinued USDC on Tron in 2024. Circle’s Cross-Chain Transfer Protocol (CCTP) moves USDC between chains by burning it on one and minting it on another, avoiding wrapped “bridged” versions.

Network fees range from fractions of a cent on networks like Solana and many Ethereum layer 2s to a few dollars on Ethereum mainnet when it is busy. Our guide to Ethereum gas fees explains how those fees are calculated.

Issuer fees for minting and redeeming

Fees for buying a stablecoin on an exchange are set by the exchange, typically a trading fee or spread. Direct issuance and redemption is mainly for businesses, and here the two issuers differ.

USDT vs USDC: which is safer?

There is no single answer, because “safer” covers several different risks. Here is how the two compare on each.

• Reserve quality: USDC holds only cash and short-term Treasury exposure. USDT holds mostly Treasuries but also gold, bitcoin and loans, which can lose value. Advantage: USDC.
• Transparency: USDC has monthly attestations and a public reserve fund. USDT has quarterly attestations and, since 2026, an annual audit. Advantage: USDC, though the gap has narrowed.
• Bank concentration: USDC’s cash at banks was the direct cause of its 2023 depeg. USDT holds relatively less bank cash. Advantage: roughly even, since USDT’s reserves carry market risk instead.
• Regulatory risk: USDC fits the EU and US frameworks. USDT is excluded from regulated EU platforms and sits outside the US regime, so access could shrink in more countries. Advantage: USDC.
• Liquidity and reach: USDT has larger circulation, more trading pairs and deeper markets on many global exchanges and in peer-to-peer markets. Advantage: USDT.
• Track record under stress: USDT has never fallen as far as USDC’s $0.87, and its excess reserves give it a cushion. Advantage: arguably USDT.
• Freeze and seizure risk: Both issuers can and do freeze addresses. Tie.

In practice, if you are in the EU or the US and care most about regulatory protection and reserve simplicity, USDC tends to score better. If you trade on global exchanges where USDT is the main quote currency, liquidity may matter more to you. Many active traders hold both and keep only what they need, rather than parking large sums in either. And remember that the platform holding your coins often carries more risk than the coin itself; our guide on keeping crypto in a wallet vs an exchange covers that trade-off.

USDT vs USDC vs DAI and USDS

A third option is a decentralized stablecoin. DAI, created by MakerDAO, is minted when users lock up collateral in smart contracts, and its successor USDS was launched when the project rebranded as Sky in 2024. DAI and USDS are overcollateralized, meaning more value is locked up than tokens issued, and anyone can inspect the collateral on-chain.

The trade-off is that a large share of their backing now consists of other stablecoins (including USDC) and tokenized Treasuries, so they inherit some of the same risks, plus smart contract risk. They are popular in DeFi lending and savings protocols but have far smaller circulation than USDT or USDC.

How to reduce stablecoin risk

• Do not treat stablecoins as savings accounts. They are tools for trading and payments. Large long-term balances belong somewhere with deposit insurance or investor protection.
• Check the issuer’s transparency page for the latest attestation date and reserve breakdown before you hold for long.
• Beware of “high-yield” stablecoin offers. Interest on a stablecoin always comes from lending or other risk somewhere. Our guide to common crypto scams shows the patterns to watch for.

Bottom line

USDC is the more conservative choice on reserves, reporting and regulation, and it is the only one of the two available on regulated EU platforms. USDT is the larger, more liquid coin and has a longer record of holding up under pressure, but its reserves include riskier assets and it sits outside the main Western regulatory regimes. Both can depeg, both can freeze funds and neither is insured. Pick based on where you live and how you use stablecoins, keep balances modest, and check each issuer’s latest reports rather than relying on reputation. For more on crypto basics, visit our crypto guides.

Sources

• Tether – Transparency (reserves and attestation reports)
• Tether – Fees
• Circle – USDC Transparency and reserves
• ESMA – Markets in Crypto-Assets Regulation (MiCA)
• Congress.gov – S.1582, GENIUS Act
• OCC – Bulletin 2026-50: GENIUS Act final rule
• CFTC – CFTC Orders Tether and Bitfinex to Pay Fines Totaling $42.5 Million