The European Central Bank has released detailed business architecture documents for its planned digital euro pilot, offering the clearest operational blueprint yet for how the system will function in practice. The framework outlines how consumers, merchants, banks and the Eurosystem itself will interact within a future digital euro ecosystem.
The architecture forms part of a broader set of pilot documents published on 5 March 2026, alongside a call for payment service providers to participate in real-world testing expected to begin in 2027. Together, the materials show that the digital euro project has progressed from theoretical design toward operational implementation.
At the heart of the system is a two-tier structure that places banks and payment providers at the centre of user interaction while the Eurosystem maintains control of issuance and settlement.
A two-tier digital euro ecosystem
Under the proposed architecture, the Eurosystem, comprising the European Central Bank and euro area national central banks, will issue the digital euro and operate the core infrastructure. This includes maintaining the central ledger, settling transactions and ensuring the resilience of the system.
Commercial banks and other payment service providers will form the distribution layer. These institutions will provide digital euro wallets, onboard customers, conduct regulatory checks and integrate digital euro payments into consumer apps and merchant payment systems.
The model mirrors the structure used in today’s financial system, where central banks issue money but private institutions manage customer relationships and payment services. According to the ECB, this approach is designed to preserve financial stability while enabling innovation within the payments sector.
How digital euro payments would work
The architecture document describes a typical payment flow within the digital euro system. A user initiates a payment through a digital euro wallet provided by a payment service provider. The provider verifies the transaction and sends it to the Eurosystem infrastructure, where settlement takes place on the central ledger. Confirmation is then returned to both parties.
This process enables near-instant settlement while maintaining oversight at the central bank level.
The pilot will support multiple types of transactions, including payments between individuals, payments from consumers to merchants and merchant refunds. These interactions are intended to replicate everyday retail payment scenarios in a controlled testing environment.
Merchant integration and retail payments
Merchants participating in the pilot will be able to accept digital euro payments through several channels. These include point-of-sale terminals, QR code payments, mobile wallet transactions and online checkout systems.
The architecture is designed to integrate with existing payment infrastructure rather than require entirely new hardware or acceptance networks. For merchants, this approach could lower adoption barriers if the digital euro is eventually introduced across the euro area.
The system also includes support for refunds, transaction reconciliation and merchant reporting, allowing digital euro payments to function within standard retail workflows.
Offline payments built into the design
One of the most significant elements of the architecture is the integration of offline payments. The system is designed to allow transactions to take place even when internet connectivity is unavailable, with payment data stored locally and synchronised later with the central infrastructure.
The ECB has repeatedly highlighted offline capability as essential for preserving the resilience and accessibility associated with physical cash.
In addition to enabling payments during network outages, the feature is intended to support payments in environments with limited connectivity, such as rural areas or temporary disruptions to telecommunications networks.
Liquidity management and system safeguards
The architecture also outlines how payment service providers will manage digital euro liquidity. Participating institutions will hold digital euro balances that allow them to process payments on behalf of their customers while maintaining settlement with the Eurosystem.
Operational safeguards within the system include authentication procedures, fraud monitoring mechanisms and transaction validation controls. These measures aim to ensure that the digital euro infrastructure meets the security standards required for critical financial market infrastructure.
Preparing for real-world testing
The business architecture document forms part of the ECB’s preparations for the digital euro pilot scheduled for 2027. During the pilot, selected users, merchants and financial institutions will test digital euro payments in controlled environments.
The exercise is intended to evaluate how the system performs under real usage conditions while allowing the Eurosystem to refine technical design, operational procedures and user experience.
Although the ECB has not yet decided whether to issue a digital euro, the pilot preparations suggest that the project has reached a stage where practical implementation scenarios are being actively developed.
For policymakers and industry participants alike, the newly published architecture provides the clearest view yet of how a digital euro ecosystem could function, combining central bank infrastructure with private sector payment services in a unified European payment network.
Related: ECB Invites Banks and Payment Firms to Join Digital Euro Pilot in 2027