MiCA and Stablecoins: What the Rules Require
MiCA governs stablecoins in the EU through two token categories, each with its own reserve, redemption and reporting duties. Here is what the rules actually demand.
Under the EU's Markets in Crypto-Assets Regulation (MiCA), a stablecoin is not one regulated thing but two. MiCA splits fiat-referenced tokens into e-money tokens (EMTs), which peg to a single official currency like the euro or the dollar, and asset-referenced tokens (ARTs), which peg to a basket of currencies, commodities, or other assets. Which bucket a token falls into decides who can issue it, what reserves it must hold, and whether it faces a hard cap on daily transaction volume.
The stablecoin rules of MiCA took effect on 30 June 2024, ahead of the broader crypto-asset service provider regime that applied from December 2024. The full text is published by the EU in Regulation (EU) 2023/1114 on EUR-Lex.
Key takeaways
- MiCA regulates stablecoins as either e-money tokens (single-currency peg) or asset-referenced tokens (basket or non-currency peg), and the classification drives every other obligation.
- EMT issuers must be an authorised credit institution or electronic money institution, hold reserves 1:1, and guarantee redemption at par at any time.
- Non-euro stablecoins used widely for payments face a daily transaction cap of 1 million transactions and EUR 200 million when used as a means of exchange inside the EU.
- Issuers cannot pay interest to holders on either token type, which changes the economics versus offshore yield-bearing designs.
- Non-compliant tokens have been delisted by EU exchanges, so the practical effect on which stablecoins Europeans can hold is already visible.
The two categories, and why the label matters
The most consequential decision under MiCA happens before any reserve is counted: how the token is classified. An e-money token references one official currency. A euro-pegged stablecoin and a USD-pegged stablecoin are both EMTs. An asset-referenced token references anything else, whether a basket of currencies, gold, or a mix. The European Securities and Markets Authority sets out the distinction in its MiCA hub.
The label matters because EMTs sit under the tighter, more familiar e-money regime, while ARTs get a bespoke and generally heavier authorisation process supervised in part by the European Banking Authority. Most of the large dollar and euro stablecoins in circulation are EMTs, so the EMT rules are where day-to-day compliance lives.
What an EMT issuer has to do
To issue an e-money token in the EU, the issuer must be a licensed credit institution (a bank) or an electronic money institution. It must hold reserve assets covering the tokens in issue, keep those reserves segregated and safeguarded, and honour redemption at par, at any moment, free of charge for the holder. Those requirements come directly from Title III of the regulation.
Two features surprise people coming from the offshore stablecoin world:
- No interest. MiCA prohibits issuers of both EMTs and ARTs from granting interest to holders in connection with holding the token. A yield-bearing design that pays holders for parking funds does not fit the EMT model.
- Reserve composition is prescribed. Reserves must be held largely in secure, low-risk, liquid assets with limits on concentration, not left to the issuer's discretion.
The transaction cap that catches non-euro stablecoins
This is where MiCA does something unusual. For an EMT denominated in a currency that is not an EU official currency (a dollar stablecoin is the obvious case), MiCA imposes limits when the token is used as a means of exchange within the EU. If usage crosses a threshold, the issuer must stop issuing that token until it falls back below the limit.
The thresholds, drawn from Article 23 of the regulation, are a daily average that must not exceed:
| Metric | Daily cap (non-EU-currency EMT, used as means of exchange) |
|---|---|
| Number of transactions | 1,000,000 |
| Value of transactions | EUR 200,000,000 |
The cap targets transactions where the token functions as payment for goods or services inside the EU, measured as a quarterly daily average. Pure trading, transfers between a user's own accounts, and other uses that are not means of exchange are treated differently. The effect is a soft ceiling on how far a foreign-currency stablecoin can penetrate everyday euro-zone payments before the issuer has to throttle new supply.
What this looked like in the market
The rules had immediate, observable consequences. In the run-up to and following the June 2024 start date, several EU-registered exchanges restricted or delisted stablecoins whose issuers were not MiCA-authorised, while euro-denominated EMTs from authorised issuers gained shelf space. New euro stablecoins launched specifically to meet the EMT framework.
For anyone trying to measure the shift, the practical question is the onchain reality: after a delisting, does supply migrate to a compliant token, move to a non-EU venue, or contract? Answering that requires resolving every transfer to a consistent set of fields (issuer, asset, chain, sender, recipient, amount, and USD value) so that a euro EMT on one chain can be compared against a dollar EMT on another, and against the same token before and after a listing change. Allium normalizes stablecoin transfer records across 150+ blockchains into that shared schema, turning a regulatory event into a measurable supply movement. The stablecoin datasets document the fields available for that comparison.
ARTs: the heavier path
Asset-referenced tokens face a more demanding regime. Issuers need explicit authorisation, must publish a detailed white paper approved by their national competent authority, and are subject to own-funds and reserve requirements plus ongoing supervision. Where an ART is judged significant (by user count, market cap, or interconnection with the financial system), the European Banking Authority takes a direct supervisory role and additional requirements apply. Because most mainstream stablecoins peg to a single currency, the ART category has seen far less issuance in practice than the EMT category.
How MiCA changes stablecoin economics in the EU
Three shifts follow directly from the rules. First, redemption at par with no fee makes a MiCA EMT closer to regulated e-money than to a lightly-supervised token. Second, the interest prohibition removes the yield lever that offshore issuers use to attract balances, pushing yield generation to the service and application layer rather than the token itself. Third, the transaction cap means a dollar stablecoin cannot become the default payment rail across the euro zone without triggering issuance limits, which structurally favours euro-denominated EMTs for in-EU payments. For teams building on this rail, the growth of B2B stablecoin payments shows where compliant volume is concentrating.
Frequently asked questions
What is the difference between an e-money token and an asset-referenced token under MiCA?
An e-money token (EMT) references a single official currency, such as the euro or the US dollar. An asset-referenced token (ART) references anything else, including a basket of currencies, commodities like gold, or a mix. EMTs fall under a tighter e-money-style regime; ARTs need bespoke authorisation and can face European Banking Authority supervision if deemed significant. Most mainstream stablecoins are EMTs.
Can a USD stablecoin be used in the EU under MiCA?
Yes, but with a constraint. A dollar-pegged EMT can be issued and used in the EU if the issuer is a MiCA-authorised credit institution or electronic money institution. However, when used as a means of exchange within the EU, its daily transaction volume is capped at 1,000,000 transactions and EUR 200,000,000. If usage exceeds that average, the issuer must stop new issuance until it falls back below the limit.
Can MiCA stablecoins pay interest to holders?
No. MiCA prohibits issuers of both e-money tokens and asset-referenced tokens from granting interest to holders in connection with holding the token. Yield, where it exists, has to come from separate services or applications rather than from the stablecoin itself. This is a significant departure from offshore yield-bearing stablecoin designs.
When did MiCA's stablecoin rules take effect?
The provisions covering e-money tokens and asset-referenced tokens applied from 30 June 2024. The broader rules for crypto-asset service providers applied from 30 December 2024. The full regulation is published as Regulation (EU) 2023/1114.
Do MiCA stablecoin issuers have to hold 1:1 reserves?
EMT issuers must hold reserve assets that fully back the tokens in issue, keep them segregated and safeguarded, and redeem at par at any time free of charge. The reserves must be held largely in secure, low-risk, liquid assets, with limits on concentration. The exact composition rules are set out in the regulation and related technical standards rather than left to issuer discretion.
Why were some stablecoins delisted by EU exchanges under MiCA?
EU-registered exchanges restricted or removed stablecoins whose issuers were not MiCA-authorised, because offering an unauthorised EMT to EU users breaches the regulation. Compliant euro and dollar EMTs from authorised issuers gained listing space, and new euro-denominated stablecoins launched specifically to meet the framework.
Interested in learning more about Allium’s stablecoin data? Speak to someone on the team.
Allium provides onchain data infrastructure. Companies named in this article may be Allium customers, prospects or commercial counterparties. The authors and other Allium personnel may hold positions in the assets discussed. This article is informational only and is not investment, legal or tax advice. Data and information last reviewed: October 12, 2026.
