Circle vs Tether: reserves, freezes and the EU rules
Both tokens are worth a dollar, and that's where the similarity ends. The two issuers report differently, freeze differently, and made opposite decisions about European regulation. None of it is visible from a casino deposit screen, and all of it is public.
- Weeklyhow often Circle discloses USDC reserve holdings
- 0.88the low USDC traded at over one weekend in 2023
- 344mUSDT frozen in one announced action on Tron
| What you are comparing | Circle, USD Coin | Tether, USDT |
|---|---|---|
| Reserve reporting | Holdings disclosed weekly | Tokens in circulation, typically daily |
| Third-party assurance | Monthly, from a Big Four firm | Not stated on the transparency page |
| EU status under MiCA | Licensed, and passported across the bloc | Authorisation not sought |
| Freeze policy as stated | On court orders and sanctions lists | At law enforcement request |
| Largest announced freeze | Individual actions, far smaller | Over 344 million, on Tron |
| Peg breaks worth knowing | March 2023, low of 0.88 | Nothing at that scale in that episode |
Reserve and assurance rows are taken from each issuer's own transparency page. The freeze and MiCA rows are taken from Circle's and Tether's respective announcements. Nothing here is a rating. These are two different products, and every row above is the choice that an issuer made and published.
What Circle and Tether each publish about reserves
Both of them publish something. What they publish, the frequency of publication, and the author(s) of the publication are three different questions with different answers.
Circle discloses weekly and assures monthly
It states on its transparency page that the USDC reserve holdings, including recent mint and burn flows, are fully disclosed weekly and that monthly reports from a Big Four accounting firm provide third-party assurance that those reserves exceed the USDC in circulation.
Tether publishes circulation daily
On its transparency page, it says that data on tokens in circulation is usually published every day. Behind a different section lies reports & reserves, and no assurance frequency is named on the page.
Frequency is not the same as depth
The daily circulation figure gives you a sense of scale. The monthly assurance provides you with an independent view of the underlying claims. They serve different purposes and are not substitutes for one another, which is why both pages merits 30 seconds of your time.
Neither of them is a casino
Regardless of your findings, the issuer is not the one holding your balance; that would be the operator, and not even the reserve report will tell you if they'll pay out on a Sunday night.
Both can freeze your coins, and Tether does it more
This is the stablecoin design feature that surprises those who showed up for decentralisation.
The USDC and USDT contracts both have a blacklist controlled by the issuer. The addition of an address to the blacklist is a normal contract call; once it is added, transfers to and from the address will revert. The coins are effectively frozen; they won't move. No exchange, wallet, or casino can fix it, and there is no appeal process built into the code.
Both issuers claim to be using the freezing power in different ways. Circle claims it freezes addresses following court orders, mandated by regulations, or listed in sanctions. Tether responds to requests from law enforcement agencies and also celebrates its activity, announcing the freezing of over 344 million USDT stored in two Tron-based wallets following a request from the Office of Foreign Assets Control (OFAC) and the U.S. Department of Justice. In published statistics, Tether dwarfs Circle in the number of addresses frozen as well as the total amount frozen.
For the ordinary player, none of this is a live risk, and that is worth understanding anyway. What it means is that your stablecoin balance is not bearer cash. It is a claim on an issuer that has kept a switch, and the switch has been used at a scale worth knowing about before you decide a token is safer than a bank.
Why Tether left the EU and Circle did not
The starkest difference between the two issuers, and one that will likely affect your ability to store either coin.
Circle applied and got the licence
It obtained an electronic money institution licence from the French regulator and, according to its own announcement, is the first global stablecoin issuer to obtain MiCA regulatory approval. The licence provides across the bloc and covers its euro token, as well as USDC.
Tether declined to apply
It declined to seek authorisation for e-money tokens on the basis that the requirement to hold an excessive proportion of reserves in bank deposits within the EU was a business decision on how to manage reserves; hence, the predictable consequence.
Regulated EU venues removed USDT
It was dropped by Coinbase Europe in December 2024 and then other regulated venues as the rules took effect. If you were inside the bloc trying to use a licensed exchange, the world's largest stablecoin was no longer available to you.
Casinos are outside all of it
These operators hold licences for Curacao and Anjouan and are not EU venues, so their cashiers still take both coins. MiCA changes where you can buy and sell USDT in Europe, and it does not change what a casino deposit screen accepts.
The regulation is laid out on ESMA's markets in crypto-assets page, which is the main source on the requirements of MiCA to an issuer.
A more closely regulated issuer does not equate to a better regulated casino. There is a tendency to read a MiCA licence as a general safety signal and to carry that impression into a deposit screen. The two are entirely separate. A European licence controls Circle's issuance and redemption of USD Coin; it says nothing about the Anjouan-licensed operator to which you are about to entrust it, its terms and conditions, its ability to use your balance, or whether it discloses a payout window. On the issuer question, choose the coin if you want. Choose the casino based on the evidence of the casino, which is a completely different activity and one that ultimately determines whether you get paid.
Circle or Tether at a casino: which dollar to hold
All the above is about the issuers. At a cashier, it's something far more prosaic that decides, namely, how many rails each coin gets and what each one costs.
Ten cashiers have been priced, with 51 Tether rails compared to USD Coin's 28; and in seven of the eight countable casinos where both sides are present, USDC has fewer networks. None of the ten selects USD Coin over Tron, which takes the cheapest rail on the market from the better-regulated coin. If it's versatility you're seeking, Tether is available at all of them.
USDC isn't just the loser here. Two casinos charge its floor lower than Tether's and at Razed the withdrawal fee is 0.69 for USD Coin vs. 4.16 for Tether across the same chains, which is six times cheaper to withdraw. Where a cashier prices both equally, it's really just a question of which issuer you prefer.
So the practical answer is boring and correct: read the floor and the fee on the exact rail you plan to use, and let the issuer question decide it only when the numbers are equal. USDC casinos carries every USD Coin rail we have priced, and the USDT comparison carries all fifty-one on the Tether side.
Questions about Circle and Tether
What is the difference between Circle's USDC and Tether's USDT? 
Both are pegged to the US dollar, but the difference is in the issuer. Circle publishes weekly reserve holdings with monthly third-party assurance, holds a MiCA licence in the EU, and states it freezes only on legal orders. Tether publishes tokens in circulation daily, chose not to seek MiCA authorisation, and has announced far larger freezes at law enforcement request.
Can Circle or Tether freeze my stablecoins?
Yes, both. Each token's smart contract includes a blacklist under the control of the issuer, and an address on this blacklist cannot send or receive. This is not a flaw; it is a feature that both issuers have made use of, and it applies to a balance in your own wallet as much as to one at a casino.
Why is USDT not available on EU exchanges?
Tether refused to apply for authorisation for e-money tokens under the EU's Markets in Crypto-Assets regulation, denouncing the reserve requirements. In response to the EU rules, trading in USDT tokens was withdrawn from regulated European trading venues, beginning with Coinbase Europe in December 2024. The first global stablecoin issuer to respond was Circle, which did the opposite.
Which stablecoin is better for a casino balance?
Neither issuer, but, makes that decision. The casino does. USDT has more rails at every cashier we have read, 51 against 28, so it is usually cheaper and always more flexible. USDC is the better-regulated dollar and is the cheaper one to withdraw at some casinos. The practical answer is whichever the cashier prices lower on the chain you use.
Has USDT ever lost its peg the way USDC did?
Not the one worth studying, though, in March 2023. That was USDC, which briefly traded as low as 88 cents, after Circle revealed 3.3 billion dollars worth of its reserves were held at the failed Silicon Valley Bank; the funds were ultimately redeemed, and the peg recovered. Both have experienced minor hiccups on other occasions, but neither has collapsed.
How can I check what backs USDC and USDT?
Download both of those transparency pages (about a ten-second job each). Circle's states that reserve assets are audited weekly with a monthly report from a Big Four accounting firm. Tether's states that circulating tokens are reported daily. Read them. Every summary is someone's reading, including this one.
Both coins, priced at every cashier
This page is the issuers. These are the numbers the casinos attach to them.
The casino comparison
USD Coin casinos price 28 USD Rails against Tether's on the same 10 cashiers, including the 2 where USD is the cheaper option.
The risk you actually carry
Are USDT casinos safe puts the peg last, behind the operator, the payout clause and the terms. The issuer is the smallest part of the problem.
Theo Brandt
I spent two years on the support side of a crypto payment processor, where the difference between the two dollar tokens came up daily and was almost always answered wrongly. Both issuers publish a great deal. Very little of it gets read, so I read it and quote it with the link attached.
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