The European Central Bank and all 27 EU national central banks filed a formal recommendation on September 22, 2026, to eliminate MiCA's mandatory bank-deposit floors for stablecoin reserves. The current rule requires issuers to park at least 30% of reserves in commercial bank accounts — rising to...
"The requirement to hold a specific share of reserve assets as bank deposits creates a direct link between issuers and credit institutions." — European System of Central Banks, MiCA Review Submission, September 22, 2026
The European Central Bank and all 27 EU national central banks filed a formal recommendation on September 22, 2026, to eliminate MiCA's mandatory bank-deposit floors for stablecoin reserves. The current rule requires issuers to park at least 30% of reserves in commercial bank accounts — rising to 60% for tokens deemed systemically significant. The ESCB wants that replaced with liquidity-maturity thresholds: 40% of reserves maturing within one working day and 60% within five days for significant tokens; 20% and 30% for smaller issuers.
The proposal addresses a structural flaw that regulators now acknowledge they built into MiCA themselves. Forcing stablecoin issuers to deposit billions into commercial banks turns token backing into bank funding. If redemptions spike, the issuer must withdraw deposits at speed, transmitting stress from the stablecoin market into the banking system within hours. The March 2023 Silicon Valley Bank episode — where Circle held $3.3 billion in deposits at SVB, triggering a USDC depeg — provided the empirical proof. Three years later, regulators in London, Frankfurt, and Basel are converging on the same conclusion: stablecoin reserves and commercial bank balance sheets should be structurally separated.
The consultation closes September 30, 2026. Any MiCA amendment requires a full EU legislative cycle, meaning issuers should not expect relief before 2027. But the direction is set. The EU, the UK, and the BIS are now aligned on a single principle: stablecoin reserves belong in liquid sovereign instruments, not in bank deposit accounts.
MiCA, which became fully operational in 2025, established a two-tier reserve structure for e-money tokens:
The logic was straightforward at the time of drafting. Legislators wanted stablecoin reserves parked in regulated, supervised institutions. Bank deposits appeared safe. They were wrong about the direction of contagion.
The remaining reserves may be held in other qualifying assets, but the deposit floors are binding. A significant stablecoin issuer with €10 billion in reserves must maintain at least €6 billion in bank accounts. As Tether CEO Paolo Ardoino noted in a late-2024 statement, if the receiving bank extends 90% of those deposits as loans — standard banking practice — only €600 million would be immediately accessible in a redemption event.
This is the structural vulnerability the ESCB now wants eliminated.
The ESCB's September 22 submission to the European Commission's targeted MiCA review calls for replacing fixed deposit percentages with liquidity-maturity buckets. The framework draws on draft regulatory technical standards published by the European Banking Authority (EBA) in 2024:
| Token Category | Current MiCA Rule | ESCB Proposal (≤1 day maturity) | ESCB Proposal (≤5 day maturity) | |---|---|---|---| | Non-significant | 30% bank deposits | 20% liquid assets | 30% liquid assets | | Significant | 60% bank deposits | 40% liquid assets | 60% liquid assets |
The qualifying asset universe under the proposed framework expands beyond bank deposits to include:
The ESCB explicitly supports maintaining two existing MiCA provisions: redemption at par (Article 49) and the ban on interest payments to token holders (Article 50). The interest ban is notable — the ESCB has separately pushed to extend it to indirect yield earned through crypto lending and staking platforms, closing what it considers a regulatory arbitrage channel.
The ESCB paper identifies bidirectional contagion as the core risk:
Direction 1 — Bank to stablecoin. If a bank holding stablecoin reserves fails or restricts withdrawals, the issuer's ability to honor redemptions at par is impaired. Reserve quality degrades. Confidence in the token drops. Holders sell. The stablecoin depegs. As the ECB stated in a June 2026 speech: "Bank failure can damage confidence in the quality and availability of stablecoin reserves."
Direction 2 — Stablecoin to bank. If stablecoin holders redeem en masse, the issuer must withdraw deposits from its banking partners at speed. For banks that have lent against those deposits — which is what banks do — this constitutes a sudden funding withdrawal. The stablecoin run becomes a bank run, transmitted through the deposit channel.
The ESCB's language is direct: stablecoins "can alter banks' funding structures by replacing relatively stable retail deposits with deposits from stablecoin issuers, which tend to be less stable and more sensitive to market conditions."
This is not a theoretical concern. It is a design flaw the regulators themselves created by mandating deposit concentration.
The March 2023 collapse of Silicon Valley Bank provided the empirical test case. Circle held $3.3 billion in deposits at SVB — roughly 8% of USDC's reserves at the time. When SVB failed, USDC depegged to approximately $0.87 on secondary markets before the FDIC intervention stabilized the situation.
A June 2026 empirical study published on arXiv (paper 2606.07442) reconstructed the contagion pathway using on-chain data. The findings:
The SVB episode demonstrated exactly what the ESCB now warns about: mandatory deposit concentration creates a transmission channel between two systems that regulators had intended to keep separate.
The EU is not acting in isolation. The Bank of England and the Bank for International Settlements have reached functionally identical conclusions through separate analytical processes.
Bank of England. On June 22, 2026, the BoE published its draft Code of Practice for systemic sterling stablecoins. The reserve structure diverges sharply from current MiCA:
| Parameter | MiCA (Significant) | BoE (Systemic) | |---|---|---| | Bank deposits | 60% minimum | 0% (excluded) | | Central bank deposits | Not specified | 30% minimum | | Government debt (≤6 months) | Permitted for remainder | Up to 70% | | Issuance cap | None | £40 billion per stablecoin |
The BoE excluded commercial bank deposits entirely from the backing framework for systemic stablecoins, citing "financial, operational, and contagion risks." Deputy Governor for Financial Stability Sarah Breeden noted: "This is a major milestone in delivering greater choice and innovation in UK payments. Innovation thrives on trust." The BoE consultation closed September 22, 2026, with finalization expected by end of 2026.
Bank for International Settlements. BIS General Manager Pablo Hernández de Cos, speaking at the Jackson Hole Economic Symposium on August 28, 2026, addressed stablecoin reserve composition directly. BIS research indicates that wholesale bank deposit reserves raise bank funding costs and tighten lending, government bill reserves reduce banks' liquid assets, and central bank reserves drain liquidity from the banking sector. The model-based assessment showed a "modest net output effect overall" but identified the bank-deposit channel as the most problematic transmission vector.
Hernández de Cos drew a structural distinction: tokenized deposits preserve monetary singleness through account-based settlement using central bank money; stablecoins do not, because USDT-to-USDC conversion requires secondary market trades with potential slippage. The BIS position favors tokenized deposits over stablecoins for routine payments and wholesale settlement.
Tether. USDT ($183.4 billion market cap as of September 10, 2026) has already exited the EU market. Tether never applied for MiCA e-money token authorization, citing opposition to the 60% deposit rule among other concerns. As of July 1, 2026, no MiCA-licensed exchange in the European Economic Area offers USDT trading pairs. Binance, Coinbase, Kraken, and Crypto.com all delisted USDT for EEA retail users. The ESCB proposal, if enacted, would remove one of Tether's stated objections to EU compliance — though re-entry would still require establishing an authorized EU subsidiary.
Circle. USDC ($74.2 billion market cap) holds MiCA authorization and has positioned itself as the compliant alternative for European markets. Circle's EURC euro-denominated stablecoin is among the nine MiCA-authorized stablecoins. The proposed liquidity-bucket framework would give Circle more freedom to hold short-dated government paper instead of concentrated bank deposits, potentially improving yield on reserves while reducing counterparty risk.
Euro stablecoin issuers. SG-FORGE (EURCV), Quantoz (EURQ and USDQ), Revolut (EURR), Membrane Finance (EUROe), and other MiCA-authorized issuers would similarly benefit from the expanded qualifying asset universe. The ability to hold overnight reverse repos and sovereign bills instead of bank deposits reduces single-counterparty exposure and aligns reserve management with standard money-market practices.
The stablecoin market stands at $302.8 billion in total capitalization as of September 10, 2026. Key figures:
Citigroup's September 2025 revised forecast projects total stablecoin issuance reaching $1.9 trillion (base case) to $4.0 trillion (bull case) by 2030. The bank models 2.5% of 2030 US bank deposits shifting to stablecoins, with partial deposit substitution accounting for 45% of the base case. Separately, Citi projects tokenized bank deposit turnover could exceed $100 trillion by decade's end if a small fraction of traditional rails migrates on-chain.
The U.S. Treasury's advisory council has flagged $6.6 trillion in U.S. transactional deposits as "at risk" from stablecoin substitution, though at $281 billion outstanding as of March 2026, the current displacement remains modest. The regulatory question is not whether the current market is systemically important but what happens when it is five to ten times larger.
The ESCB submission is an input to the European Commission's targeted MiCA review. The consultation window closes September 30, 2026. From there:
This process typically requires 12-24 months at minimum. Issuers operating under current MiCA rules should not expect the deposit floors to change before late 2027 at the earliest.
The U.S. comparison is instructive. The GENIUS Act, which would have established a federal stablecoin framework, failed 49-50 in the Senate. The CLARITY Act met a similar fate. In the absence of federal legislation, U.S. regulators are proceeding through existing authority — the CFTC through its tokenization rulemaking, the SEC through enforcement actions. The EU, by contrast, has the advantage of having already enacted a comprehensive framework. The question is whether it can amend that framework faster than the market outgrows its assumptions.
The ESCB's September 22 submission marks the moment the EU's central banking establishment acknowledged that a rule it helped design — the mandatory deposit floor — creates the very systemic risk it was intended to prevent. The proposed fix is technocratic and measured: replace rigid deposit percentages with flexible liquidity-maturity requirements. The underlying message is structural: stablecoin reserves do not belong on commercial bank balance sheets at scale.
Three major regulatory bodies — the ECB, the Bank of England, and the BIS — have now converged on this conclusion through independent analytical tracks. The $302.8 billion stablecoin market is small relative to the $6.6 trillion in U.S. transactional deposits it could eventually displace. But Citi's $1.9-to-$4.0 trillion 2030 projection means the contagion channel will grow by an order of magnitude within four years if current adoption rates hold.
The EU's challenge is speed. MiCA was drafted in a different era of stablecoin adoption. The deposit rule was written when the entire market was under $150 billion. At $303 billion and climbing, the architecture needs updating. Whether the EU legislative process can deliver that update before the market renders it irrelevant is the open question.