The European Central Bank has opened the digital euro project to online merchants, inviting e-commerce and mobile-commerce businesses to join a controlled pilot that will test how a central bank digital currency fits into actual payment journeys. Applications opened on 15 September and close on 27 October, while the 12-month exercise is scheduled to begin in the second half of 2027. Rather than testing the ledger in isolation, the programme will put a beta digital euro into checkout processes, payment-provider infrastructure, and merchant operations.

The beta currency will be technically close to the design envisaged for a possible digital euro, although it will not have legal-tender status and will circulate only inside the pilot environment. Staff at the ECB and participating national central banks will act as users, while selected payment providers and merchants will handle the infrastructure required to send and receive the test currency. The merchant call concentrates on remote person-to-business payments, adding online and mobile checkout to a programme that will also examine physical payments and transfers between individuals.

Businesses selected through the merchant call will need a relationship with an acquiring provider taking part in the pilot, alongside an agreement with the ECB or a participating national central bank. Applicants will be assessed on factors including operational readiness, market reach, and suitability for testing, while participation is voluntary and unpaid. The ECB is looking for merchants active across at least two pilot locations, reflecting an effort to test a common payment instrument across national markets rather than inside one domestic environment.

That brings the project into the payment plumbing where new schemes have to coexist with systems businesses already use. A mechanism can function correctly at ledger level while still creating friction around checkout integration, authentication, refunds, reconciliation, customer support, or acquiring relationships. Merchant participation gives the Eurosystem an opportunity to find those problems before a decision on issuance is made.

From architecture to payment infrastructure

The merchant phase follows the ECB’s selection in July of 36 payment service providers from more than 50 applicants. Some will distribute beta digital euro services to users, others will provide acquiring services that allow merchants to accept the currency, and several will perform both roles. Those providers are now working with the Eurosystem on interfaces, operating procedures, and support processes before transactions begin.

The testing remit reaches beyond whether money successfully moves between two endpoints, because the Eurosystem wants evidence on the wider user experience and the way its design fits existing commercial systems. Merchants will examine checkout journeys, integration requirements, and the practical relationship with acquiring providers, while the resulting feedback is intended to inform later technical specifications. That makes the pilot a test of interoperability and operations as well as the underlying payment technology.

Existing rules around payments, data protection, and anti-money-laundering controls will continue to apply to participating providers. Although the currency itself is simulated, businesses will therefore be working through familiar regulated relationships around transaction handling and customer data. The operational burden will fall across payments teams, technology functions, compliance staff, and external providers rather than remaining with central-bank engineers.

European commerce is also fragmented in ways that specifications cannot remove. A merchant operating across several euro-area countries may use different acquiring arrangements, fraud systems, checkout software, and payment-orchestration platforms, even when its customers see a common storefront. A digital euro will have to fit that commercial infrastructure unless policymakers expect businesses to rebuild payment stacks around a public scheme.

Acceptance becomes the practical test

Much of the digital euro debate has centred on privacy, financial stability, monetary design, and the relationship between central banks and commercial lenders, but merchant acceptance will determine whether a future currency can become part of ordinary commerce. Existing card networks, wallets, account-to-account services, and national payment methods already compete for checkout space. Every additional option creates some integration and support cost, even where its transaction economics are attractive.

The ECB continues to separate technical preparation from a decision to issue the currency. The beta digital euro will disappear when the pilot ends, while final issuance remains dependent on the European legislative process and a subsequent decision by the Eurosystem. The current timetable is intended to leave the infrastructure technically ready for a possible first issuance in 2029 if the legal framework is in place.

Applications from online and mobile merchants close at 17:00 CET on 27 October, after which the Eurosystem will assemble the commercial side of the exercise alongside the payment providers already chosen. By the time testing begins in 2027, the digital euro project should have moved beyond specifications and consultation into merchant systems that resemble the environment a future currency would actually have to inhabit.