Circle has stated that USDC is the only one of the world's ten largest stablecoins that currently complies with the European Union's Markets in Crypto-Assets (MiCA) regulation. If accurate, this means the EU's approximately 450 million residents no longer have regulated access to most major dollar-backed stablecoins, including Tether's USDT.

The declaration comes as Europe fully implements its landmark crypto legislation—the world's first comprehensive framework for digital assets—reshaping the stablecoin landscape across the region and fueling debate over whether MiCA has successfully balanced innovation against financial stability. Policymakers in the United Kingdom, Hong Kong, Singapore, and elsewhere are closely monitoring the outcome as they develop their own stablecoin regimes.

Only Two Circle Tokens Meet MiCA Standards

According to Circle's European regulatory page, USDC is the sole top-10 stablecoin by market capitalization to receive approval under MiCA. EURC, Circle's euro-backed token, has also been accepted. The company states that both tokens are fully redeemable in fiat currency, with reserves maintained in regulatory compliance and made available to the public. Circle published its most recent reserve report on August 3.

Under the MiCA framework, stablecoin issuers must segregate their reserves, publish regular attestations, comply with customer redemption rights, and adhere to governance standards. Exchanges serving EU customers can no longer offer stablecoins from issuers that fail to meet these requirements.

The MiCA transition period concluded on July 1. The European Securities and Markets Authority (ESMA) called on all unauthorized firms to cease operations, reminding the public that the only legal providers of crypto-asset services in the European Union and European Economic Area are licensed firms.

The stricter regulations reflect growing regulatory concern over the expanding role of stablecoins in finance. The European Systemic Risk Board (ESRB) has warned that the increasing interconnection between stablecoin reserves, banks, and broader financial markets necessitates closer supervision to prevent systemic risks.

The 60% Reserve Rule That Kept Tether Out

The most demanding requirement for large issuers is MiCA's reserve mandate. Stablecoins classified as "significant" must hold at least 60% of their reserves in bank deposits within the EU. This classification applies to issuers that meet at least three of seven criteria: more than 10 million token holders; market capitalization exceeding €5 billion; average daily transactions surpassing 2.5 million in number and €500 million in aggregate value; gatekeeper status; global significance of the issuer's activities; financial interconnectedness; and multi-token activity. USDT meets all of the quantitative thresholds.

The MiCA approach contrasts with the United States' stablecoin framework under the GENIUS Act, passed in 2025, which permits a broader range of qualifying reserve assets including Treasury securities and central bank deposits without imposing a comparable concentration requirement in any single banking jurisdiction. USDT continues to operate in US markets under that framework.

Rather than comply, Tether opted to exit the EU market and discontinued its euro-pegged stablecoin, EURT.

"After careful consideration, we have made the decision to discontinue support for EUR₮. As such, Tether has ceased minting EUR₮, with the last acquisition request processed in 2022, and new EUR₮ issuance requests are no longer accepted. This decision aligns with our broader strategic direction, considering the evolving regulatory frameworks surrounding stablecoins in the European market. Until a more risk-averse framework is in place—one that fosters innovation and offers the stability and protection our users deserve—we have chosen to prioritize other initiatives." — Tether Updates Users on a Strategic Transition to Better Support Community-Driven Product Support

Tether CEO Paolo Ardoino argued that requiring issuers to shift assets from short-term US Treasuries into commercial bank deposits could undermine stablecoin stability, particularly during periods of financial stress. In remarks following an interview with Italian television, Ardoino stated that MiCA "poses a systemic risk to European banking stability" and explained that Tether's EU exit was driven by the preference to "protect our current users who use Tether USDt as their only stable currency option."

Criticism extends beyond Tether. Industry association Blockchain for Europe has urged the European Commission to review specific provisions of MiCA's stablecoin regulation, arguing that certain rules may undermine Europe's competitive position.

Delistings Leave Aggregate Trading Volumes Largely Unchanged

Major exchanges responded quickly. Binance, Coinbase, Kraken, and OKX removed USDT trading pairs from their European platforms to avoid potential MiCA violations.

Despite these delistings, the broader cryptocurrency market did not experience the significant disruptions many had anticipated. According to research published in July 2026 by LUISS economist Nicola Borri and University of Surrey researcher Kirill Shakhnov, the total market shares of USDT and USDC "barely move" following the delisting. In Europe, USDC's share in USDT-to-USDC trading rose by approximately six percent, driven primarily by a roughly 20% decline in USDT trading volume after its removal rather than by increased demand for USDC. The muted global response reflects the fact that EU-based trading accounts for a minority share of worldwide cryptocurrency volume, with the largest stablecoin markets centered in Asia and North America.

The transition has also introduced new security risks. As reported by Cryptopolitan, there has been a significant increase in impersonation scams targeting users attempting to move assets onto MiCA-compliant platforms.

Euro Stablecoins Reach Record Valuation as Issuers Enter the Market

MiCA is also reshaping the euro-pegged stablecoin sector. DefiLlama data shows that MiCA-compliant euro stablecoins approached $900 million in total value during mid-2026, a record for the sector. CoinGecko ranks Circle's EURC as the largest euro-backed stablecoin following EURT's discontinuation, while Token Terminal data indicates that euro stablecoins still account for well under 1% of the approximately $300 billion global stablecoin market.

🇪🇺 Two things are true at the same time about the status quo of stablecoins under MICA in the EU: 1️⃣ There are now ~35 regulated e-money tokens from 21 issuers, banks and EMIs alike. Real institutions are betting on this space and many large EU corporations will enter over the… pic.twitter.com/t6LlwtWvUR

— Patrick Hansen (@paddi_hansen) July 28, 2026

Regulators continue approving new issuers. ESMA has authorized 19 e-money token issuers across 11 EU member states, while policy analyst Patrick Hansen estimates there were approximately 35 regulated e-money tokens from 21 companies as of late July.

Traditional banks are also entering the space. A consortium of nine European banks, including BBVA, ING, and UniCredit, plans to launch a MiCA-compliant euro stablecoin, signaling that regulated banks view tokenized money as a critical component of Europe's future payment infrastructure.

Even so, euro stablecoins remain a minor presence internationally. While MiCA encourages regulated issuance of euro-denominated stablecoins, dollar-backed stablecoins continue to dominate crypto trading, payments, and liquidity worldwide. The coming months will test whether the growing roster of regulated euro tokens can meaningfully shift that balance, or whether regulatory clarity alone is insufficient to overcome the deep network effects of dollar-denominated liquidity.