ESCB Pushes to Rewrite MiCA Stablecoin Liquidity Rules
The European System of Central Banks has formally asked the European Commission to scrap MiCA's mandatory bank-deposit thresholds for stablecoin reserves and replace them with maturity-based liquidity requirements. The proposal, submitted in the ESCB's response to the Commission's ongoing MiCA review, signals that the EU's central banking community believes the current rules create systemic vulnerabilities rather than reduce them. For accounting firms advising stablecoin issuers and for CFOs managing digital-asset treasury positions, the change would reshape how reserve assets are classified, measured, and disclosed under both IFRS and internal liquidity frameworks.
What MiCA Currently Requires
Under the existing Markets in Crypto-Assets Regulation, e-money token and asset-referenced token issuers must hold a defined share of their reserve assets as deposits with credit institutions. The thresholds are tiered by significance: standard stablecoins must park at least 30% of reserves in bank deposits, while tokens classified as "significant" face a higher floor of 60%.
Why the ESCB Considers These Rules Problematic
The ESCB's formal submission argues that concentrating a large portion of stablecoin reserves inside the banking system creates a direct, structural dependency between issuers and credit institutions. The core concern is straightforward: if holders rush to redeem a stablecoin at scale, the issuer must rapidly unwind those deposits. That forced withdrawal can itself trigger or amplify liquidity stress at the receiving bank, particularly when the deposits are material relative to the bank's own liquidity buffers.
In the ESCB's framing, the rule designed to make stablecoin reserves "safe" can paradoxically destabilise the banks acting as custodians. This is not a theoretical concern for central banks watching deposit flows in an era when stablecoin market capitalisation has grown substantially across the eurozone.
The Proposed Replacement: Maturity-Based Liquidity Thresholds
Rather than mandating where reserves are held, the ESCB wants rules that govern how quickly reserves can be liquidated. The proposal centres on minimum liquidity thresholds tied to asset maturity windows: a specified share of total reserves must be in instruments maturing within one working day, and a separate, larger share must mature within five working days.
The EBA Draft Rules as a Reference Point
The ESCB's submission explicitly references draft guidance published by the European Banking Authority in 2024. Under those draft rules, significant stablecoin issuers would be required to hold at least 40% of reserves in assets maturing within one working day and at least 60% in assets maturing within five working days. For non-significant tokens, the corresponding thresholds are 20% and 30%.
By anchoring the ESCB proposal to the EBA's own published draft, the central banks are essentially arguing for regulatory alignment: the liquidity framework should be consistent across banking supervision and crypto-asset supervision rather than creating two conflicting regimes.
Eligible Alternative Instruments
The ESCB separately identified overnight reverse repurchase agreements and short-term sovereign bonds as instruments that could satisfy the proposed liquidity thresholds. Both carry shorter duration and, in normal market conditions, higher liquidity than term bank deposits. Overnight repos in particular allow an issuer to roll exposure daily, maintaining near-instant access to cash without creating a structural claim on a single credit institution's balance sheet.
MiCA Enforcement: A Separate Warning
Beyond the reserve composition debate, the ESCB's response raised a distinct concern about MiCA's practical reach. Central banks warned of "material challenges" in enforcing the regulation, noting that crypto firms operating without EU authorisation can still serve EU customers. The licensing regime that MiCA introduced has not, in the ESCB's assessment, fully insulated retail and institutional customers from non-compliant providers.
This is a significant admission. It implies that the compliance burden falling on authorised issuers and CASPs (including the reserve rules under debate) is not matched by equivalent deterrence against unlicensed competitors. Firms already invested in full MiCA compliance should document this regulatory asymmetry as part of their risk disclosures and AML risk assessments.
Accounting and Reporting Implications
The shift from deposit-concentration rules to maturity-based liquidity thresholds is not merely a prudential question. It has direct consequences for how stablecoin issuers present their reserve assets in financial statements and how their counterparties account for those relationships.
Reserve Asset Classification Under IFRS
Under IFRS 9, the classification of a financial asset depends on the entity's business model for managing it and the instrument's contractual cash flow characteristics. Bank deposits held to meet a regulatory minimum are typically classified at amortised cost, which is straightforward. If the proposed regime moves issuers toward sovereign bonds held for liquidity management, classification will depend on whether those bonds pass the solely payments of principal and interest (SPPI) test and whether the business model is hold-to-collect or hold-to-collect-and-sell.
Short-term sovereign bonds used for liquidity management are often held in a "hold-to-collect-and-sell" model, triggering fair value through other comprehensive income (FVOCI) classification. That means mark-to-market movements flow through OCI rather than the income statement, affecting net assets and regulatory capital ratios differently from amortised cost deposits. Issuers and their auditors need to anticipate this shift now, before any rule change is finalised, because business model reassessments cannot be made retrospectively under IFRS 9.
For overnight repo positions, the accounting treatment depends on whether the arrangement is structured as a collateralised borrowing or a sale-and-repurchase. Most repo transactions remain on the balance sheet of the cash-providing party under IFRS 9 derecognition criteria, but the gross presentation of the asset and the corresponding liability can affect leverage ratios and liquidity coverage disclosures.
Stablecoin Accounting for Holders Under IFRS and US GAAP
For firms holding stablecoins as treasury assets rather than issuing them, the reserve composition rules affect the credit quality and liquidity assessment of the instruments they hold. Under IFRS, stablecoins are currently most commonly treated as intangible assets at cost less impairment, though the IASB's agenda decision and subsequent standard-setting work has opened debate about fair-value presentation for certain holdings. Under US GAAP, ASC 350-60 now requires entities to measure crypto assets at fair value, with changes recognised in net income. Neither framework directly links the accounting treatment to the issuer's reserve composition, but a change in reserve quality affects the credit risk embedded in the stablecoin's market price and therefore the fair value measurement inputs.
If the ESCB's proposal leads to reserves being held in higher-quality, shorter-duration instruments, the theoretical floor on a stablecoin's recoverable value in a stress scenario improves. That matters for how firms assess impairment risk under legacy frameworks and for the Level 1/Level 2/Level 3 fair value hierarchy classification under both IFRS 13 and ASC 820.
Implications for Bank Counterparties
EU banks currently receiving significant stablecoin reserve deposits face a potential reduction in a funding source that, while volatile, has grown in volume. If the rule change proceeds, treasury teams at those banks will need to model the outflow scenario differently. The deposits that MiCA currently guarantees would instead migrate to repo desks and sovereign bond markets. Banks that have structured their liquidity coverage ratio calculations partly around the predictability of these regulatory deposits should begin scenario analysis now.
What Firms Should Do Now
The ESCB's submission is a formal response to a regulatory review, not yet a legislative proposal. The European Commission will consider this and other responses before publishing any amendment to MiCA's reserve requirements. That process will take time. But the direction of travel is clear enough to warrant immediate action on several fronts.
For Stablecoin Issuers and Their Auditors
Issuers should map their current reserve portfolios against both the existing MiCA thresholds and the EBA's 2024 draft liquidity thresholds, since the EBA framework appears likely to anchor any revised regime. Auditors reviewing reserve adequacy disclosures should ensure engagement letters and audit programmes already contemplate a maturity-ladder analysis, not just a deposit-concentration check. If issuers are considering restructuring reserves ahead of any rule change, document the business rationale carefully: IFRS 9 business model changes require contemporaneous evidence.
For CFOs and Treasury Teams Holding Stablecoins
Update internal credit risk frameworks to include reserve composition as a monitored variable for any euro-denominated stablecoin held as a treasury asset. The ESCB's own concern about enforcement gaps means that counterparty due diligence should distinguish between MiCA-authorised issuers and non-compliant providers still accessible to EU investors. That distinction should be documented in investment policy statements and reflected in risk disclosures.
For Accounting Firms Advising EU Clients
Clients with material stablecoin positions or reserve management mandates need to understand that the MiCA framework is under active revision. Engagement letters for the current reporting period should flag this as a subsequent event risk if the Commission moves quickly, and technical memos should address the IFRS 9 and IFRS 13 implications of a shift from bank deposits to sovereign bonds and repos as primary reserve instruments. Firms with clients on both sides, issuers and holders, should also assess whether any conflict of interest policies need updating given the divergent interests at play.
The ESCB's intervention also reinforces a broader point: banks are increasingly central to the MiCA compliance ecosystem, and the lines between traditional banking regulation and crypto-asset regulation are blurring faster than most firms anticipated. The reserve rule debate is one example. The parallel stablecoin regulatory discussions in the United States show that reserve quality and liquidity requirements are becoming a global standard-setting priority, not just an EU concern.
Source: Cointelegraph
Frequently Asked Questions
What is the ESCB proposing to change about MiCA stablecoin reserves?
The European System of Central Banks wants to remove the current rules that require stablecoin issuers to hold specific percentages of reserves as bank deposits (30% for standard tokens, 60% for significant ones). In their place, the ESCB proposes minimum liquidity thresholds based on how quickly reserve assets can be liquidated, with floors tied to one-day and five-day maturity windows.
Why do EU central banks see the current deposit rules as risky?
The ESCB argues that large mandatory deposits create a structural link between stablecoin issuers and credit institutions. If a stablecoin faces a run, the issuer must rapidly withdraw those deposits, which can itself cause or worsen a liquidity crisis at the bank holding them. The rule intended to protect reserve holders could therefore destabilise the banking system.
How would short-term sovereign bonds and repos satisfy the new requirements?
Both instruments can be converted to cash quickly and without relying on a single bank counterparty. Overnight repos mature within one working day by definition, and short-term sovereign bonds in liquid markets can typically be sold or used as collateral within the proposed maturity windows. The EBA's 2024 draft rules, which the ESCB references, set the specific percentage thresholds these instruments would need to satisfy.
What does this mean for how stablecoin reserves are accounted for under IFRS?
A move from bank deposits to sovereign bonds and repos would likely change the IFRS 9 classification of reserve assets for issuers. Sovereign bonds held in a liquidity management context are often classified at fair value through OCI rather than amortised cost, meaning mark-to-market movements affect equity rather than profit and loss. Repo positions require careful analysis under IFRS 9's derecognition criteria. Issuers should work with their auditors to assess the accounting impact before any restructuring.
Is the ESCB's proposal already law, and when might changes take effect?
No. The proposal is a formal submission to the European Commission's review of MiCA, not a legislative change. The Commission will assess responses from multiple stakeholders before deciding whether to propose amendments. Any change would then go through the standard EU legislative process, which typically takes at least one to two years. Firms should monitor the Commission's response to the review closely.