What is the digital euro? The complete guide

The digital euro is a retail central bank digital currency project of the ECB and the Eurosystem. In plain terms: central bank money, in digital form, intended for ordinary people making ordinary payments.

That one sentence already rules out most of what you will read about it elsewhere. It is not a cryptocurrency. It is not a stablecoin. It is not a blockchain. And it is not a wholesale settlement system for banks — it is retail, which is precisely what makes it complicated.

What problem is it actually solving?#

Cash is the only form of central bank money the public can hold today. Every other euro in your life is a claim on a commercial bank — a deposit, which is that bank's liability to you. Cash use keeps falling, and the digital alternatives that replaced it are largely operated outside the EU.

The digital euro is the Eurosystem's answer to a fairly narrow question: what happens to public access to central bank money when nobody uses cash any more?

That framing explains design decisions that otherwise look arbitrary. Free basic services for individuals. Offline payments that work without connectivity. A holding limit that stops it becoming a savings vehicle. None of these make sense for a product. All of them make sense for a public utility meant to behave like cash.

Who can distribute it#

Distribution happens only through supervised PSPs — banks, payment institutions and e-money institutions. The Eurosystem issues the money and settles the transactions, but it does not onboard you, hold your relationship, or build your app.

Two roles split the work:

• A distributing PSP serves individual users.
• An acquiring PSP serves business users.

Here is the part that changes the strategic picture for banks: once the digital euro launches, credit institutions will be obliged to offer basic digital euro services to their customers on request. And basic services are free for individuals.

Read those two facts together. Mandatory to offer, no fee income from the basic service. For most credit institutions, the digital euro is not a product opportunity to evaluate — it is a compliance obligation to absorb at the lowest sane cost. That is the single most important thing to understand about the market this creates.

How an account works#

Individuals#

An individual gets one account. They may optionally attach a phone-number alias, in a strictly 1:1 relationship with the account — one number, one account, no fan-out.

They are subject to a holding limit, and they may optionally nominate a linked commercial bank account. That linked account is what unlocks the two mechanisms everything else depends on:

• Waterfall — incoming amounts above the limit transfer automatically to the linked account.
• Reverse waterfall — payments exceeding the balance automatically fund the difference from the linked account.

Together these mean the holding limit constrains how much you hold, not how much you can pay. A user can sit at a near-zero balance and still transact normally.

Businesses#

Businesses live under an inverted set of rules:

• Holding limit of zero.
• A linked account is mandatory, not optional.
• No aliases at all.
• Unlimited accounts.

A holding limit of zero is the whole point rather than a restriction. Merchants never accumulate central bank money; incoming digital euro waterfalls straight through to commercial bank money. The digital euro is a rail for a business, not a place to keep funds.

How you are identified: the DEAN#

Every digital euro account has a DEAN — the Digital Euro Account Number. It is the digital euro's IBAN-equivalent, and it is 18 alphanumeric characters:

Two details carry real weight.

The check digits use the same checksum family as the IBAN, so a mistyped DEAN can be caught client-side before anything is submitted. You can try that yourself.

And DEANs are generated only by the Eurosystem, through the DESP. A PSP requests an account and receives an identifier back. It never allocates one from a range of its own — which tells you something important: unlike an IBAN, a DEAN does not encode which institution holds the account, because the Eurosystem is the settlement layer.

Positions 5–18 — the indicator digit plus serial — are the BEAN.

The technology: emphatically not a blockchain#

Settlement is centralised on the Eurosystem's DESP (Digital Euro Service Platform). There is no distributed ledger, no consensus mechanism, nothing being mined.

The integration surface is deliberately ordinary:

If you have done PSD2 work, none of that list is new to you. That is the point — the digital euro is mostly a fairly conventional payments integration, and the pilot's technical documentation is public on the ECB website, including back-end API specifications in YAML. You can read the contract rather than guess at it.

We go deeper in the technology pillar.

Privacy, and the offline mode#

Privacy works through pseudonymisation: the Eurosystem cannot directly identify individuals from payment data. Mechanisms like aliases and SEPI are how that is implemented in practice, rather than being a promise on a slide.

The offline digital euro goes further. Value is stored on a secure element on the user's own device and moves device-to-device over NFC, with cash-like privacy and no connection required. That is not a convenience feature — a payment method that dies with the network is not a replacement for cash.

Where it is right now#

1. July 2026

   Rulebook v0.91 published

   A draft — explicitly not something to rely on for implementation.

2. 14 July 2026

   36 PSPs selected for the pilot

   Chosen from 57 applications, across 19 countries including Croatia.

3. Q3 2026

   Development starts

   Build work on the pilot begins.

4. H2 2027

   Live pilot, ~12 months

   A beta digital euro, with ECB and national central bank staff as the users.

5. ~2029

   Targeted launch

   Dependent on the legislation completing its passage.

The regulation is still in the EU legislative process, and the decision on whether to issue the digital euro will only be considered once that process completes. Everything above is a plan, not a guarantee.

The full breakdown is in the timeline pillar.

What you should actually do about it#

If you are at a credit institution, the honest summary is this: you have an obligation arriving in roughly three years, against a specification that is still a draft, for a service you cannot charge individuals for.

That combination argues for a particular posture. Do not build against v0.91 as though it were final. Do work out now whether you will build or buy, because that decision has a long lead time and gets more expensive the later you make it. Note that PSPs may outsource development and operations to a TSP — while retaining regulatory responsibility, which never transfers.

Start with what PSPs and banks must do.