The digital euro rulebook: the scheme rules behind a currency that does not exist yet
The digital euro rulebook is the document that would make a digital euro payment work the same way at every bank in the euro area. The ECB describes it as a single set of rules, standards and procedures for the use of the digital euro across the euro area, with the aim that the user experience is identical whichever country and whichever payment service provider is involved, as is the case with cash today.
This page goes below the digital euro in Germany, which covers the project and where the legislation stands. Here the subject is the rulebook as a document: what the current draft contains, who writes it, what a distributing bank would have to build under it, and which questions the ECB itself lists as unfinished. If your institution would have to distribute a digital euro, this document is your specification.
What the rulebook is and what it is not
A scheme rulebook sets the rules between the participants in a payment scheme, the way the EPC rulebooks do for the credit transfer and the direct debit. The digital euro rulebook would bind the supervised payment service providers that distribute the digital euro to end users. It establishes only what is needed to standardize the basic services, and it leaves room for providers to build additional products on top.
It is not the law. The Digital Euro Regulation, proposed by the European Commission in June 2023, is the law, and it is still with the co-legislators. The ECB is explicit that the draft rulebook stays flexible enough to absorb adjustments from those negotiations, which is why the current version is labeled interim. A bank reading it is reading a specification that can still change in the places the legislature has not settled.
The Rulebook Development Group
The ECB writes the draft with the Rulebook Development Group, the RDG, made up of senior representatives of European associations from both sides of the retail payments market: consumers, merchants, payment service providers and third-party providers, with euro area national central banks and observers from the European Commission, the European Parliament and the rotating Council presidency.
The structure below it is where the technical work happens. Since 2023 the RDG has held 25 meetings and set up 11 workstreams of market experts, of which five were active at the latest count: one on risk management, three on front-end implementation specifications for the end-user interface, the distributing provider interface and the acquiring provider interface, and one on the back-end specification for the interface to the digital euro service platform. That is how a bank or a merchant association actually feeds into the text: through an association in the RDG and its experts in a workstream.
What the current draft sets out
The draft delivered in June 2025 was restructured into a rules-based format, with each rule labeled and numbered so it can be cited, and with the mandatory provisions made explicit against the optional ones. Several areas were new in that version, and they show what distribution would actually require.
Minimum user experience requirements set generic rules plus specific ones with wireframes for point of sale, e-commerce, mobile commerce and person-to-person payments. Brand rules govern how a provider presents digital euro services, so the product is recognizable across channels. Front-end implementation specifications cover the provider's mobile app and website; back-end specifications describe how a provider interacts with the digital euro service platform for access management, alias lookup and settlement. A dispute management section defines the dispute reasons, scenarios and process flows, and an onboarding process sets out the steps, testing and certification a provider has to pass to join the scheme.
What a distributing bank would have to implement
Read as a work list, the rulebook is substantial. A distributing provider would build the user-facing app and web flows to the UX requirements and the wireframes, integrate with the digital euro service platform for access management, alias lookup and settlement, operate alias payments so a user can be paid without exchanging account numbers, and support portability, the ability to carry a digital euro account number from one provider to another, which has no equivalent in the IBAN system today.
Then the money management. The waterfall converts digital euro above the holding limit into commercial bank money on a linked account, and the reverse waterfall pulls commercial bank money in when the digital euro balance is short of a payment. Both have to work automatically, in the payment, which makes them a core banking integration and not a wallet feature. Digital euro holding limits cover the cap those functions exist to manage, and core banking in Germany covers the systems they would plug into.
How the rulebook relates to the regulation
The sequence is awkward and deliberately so. The ECB is writing the scheme rules while the Digital Euro Regulation is still being negotiated, because waiting for the law would add years to the delivery. The consequence is that the draft tracks the Commission proposal and the design choices approved by the ECB Governing Council, and the ECB states plainly that adjustments from the co-legislators would be absorbed.
It also means some questions are outside the rulebook by definition. Around 10 percent of the comments on the previous draft were ruled outside the RDG mandate, including the sequencing of use cases and the holding limits, which belong to the legislature or to other bodies such as the Euro Retail Payments Board. A bank that wants to influence the holding limit is lobbying the wrong document.
The open points the ECB's own reports name
The ECB publishes the gaps, which makes the progress reports more useful than most industry commentary. On the previous draft, around 2,000 unique comments came back from RDG members and their constituents: 36 percent went straight into the new version, 48 percent went to the Eurosystem or a workstream for further consideration, 6 percent were held for future iterations and 10 percent fell outside the mandate.
The items held for later name themselves: provider onboarding, point-of-sale and ATM specifications, offline authentication and the adherence model. Areas that depend on vendors or on the choice of open standards also remain open, among them the technical implementation specifications, the non-functional requirements, the reporting requirements and the certification and testing processes. The subsequent consultation ran from July to October 2025 and produced over 4,000 comments, which the ECB worked into the next version published in 2026 alongside its sixth progress report.
What is the digital euro rulebook?
The digital euro rulebook is the scheme document the ECB is drafting to set a single set of rules, standards and procedures for digital euro payments across the euro area. It would bind the payment service providers that distribute the digital euro, standardizing the basic services so the user experience is the same in every country and at every provider.
Who writes the digital euro rulebook?
The ECB drafts it together with the Rulebook Development Group, which brings together European associations representing consumers, merchants, payment service providers and third-party providers, plus euro area national central banks and observers from the EU institutions. Technical work happens in expert workstreams; the RDG has held 25 meetings and established 11 workstreams since 2023.
Is the digital euro rulebook final?
No. The current version is an interim draft, deliberately flexible so it can take up changes from the negotiations on the Digital Euro Regulation. Several areas are explicitly unfinished, including provider onboarding, point-of-sale and ATM specifications, offline authentication and the certification and testing processes.
The digital euro rulebook and Finance Loop
Finance Loop brings the people who would implement the rulebook together with the people writing it: the bank project teams reading the implementation specifications, the merchants who would accept the payment, and the association representatives who sit in the RDG. Finance Loop is the meeting place for the digital euro in Germany, with meetups and conferences on central bank money, instant transfers and payment regulation, many of them in Frankfurt, where the ECB sits. Finance Loop keeps those dates in its event calendar.
Finance Loop is a professional network and has the goal of driving the adoption of emerging technologies in finance, such as AI, tokenization, stablecoins, and DeFi. Finance Loop helps its members build skills and personal networks in these fields: Investment & Digital Assets, Payments & Digital Money, Digital Infrastructure & Sovereignty, and Risk & Compliance.