OECD's Crypto-Asset Reporting Framework takes effect in EU
The OECD's Crypto-Asset Reporting Framework will start in the EU on January 1, 2026, with first reports due in 2027 to combat tax evasion.
Ryan Mitchell 5 min read
The reporting obligations that will eventually make crypto holdings visible across borders are no longer a proposal. As of 2026, the OECD’s Crypto-Asset Reporting Framework is in force across the European Union, and the machinery for tax authorities to hand each other crypto transaction data is being assembled ahead of its first real test next year.
What CARF actually is
CARF is an OECD-led framework requiring the automatic exchange of cryptocurrency transaction information between countries’ tax authorities. Its purpose is straightforward: to combat tax evasion by removing the assumption that a crypto position held through a service provider in one jurisdiction is invisible to the tax administration of the country where the holder actually lives. Rather than requiring a tax authority to request information case by case, CARF establishes a standing flow of data between participating jurisdictions.
The framework did not appear overnight. OECD member nations endorsed it in June 2023, and the years since have been spent turning a political commitment into something that can be implemented by national legislatures and, eventually, by the service providers who have to file the reports.
CARF’s design borrows heavily from the Common Reporting Standard, the OECD framework introduced more than a decade earlier to automate the exchange of information about bank accounts held abroad, which is credited with substantially reducing offshore tax evasion through traditional banking channels once it came into force. Regulators built CARF on the same underlying premise applied to a newer asset class: crypto’s pseudonymity had made it a plausible route around the very disclosure regime the Common Reporting Standard had established for conventional financial accounts, since a crypto holding sitting with a foreign exchange or custodian fell outside a system built around bank and brokerage accounts. CARF closes that gap by defining crypto-asset service providers as reporting entities in essentially the same way banks and brokerages already are.
How the EU implemented it
The European Union chose to bring CARF into force through its existing tax-cooperation architecture rather than as a standalone instrument. All 27 EU Member States have committed to implementing the framework, adopted through an amendment to the EU’s Directive on Administrative Co-operation in Taxation, the eighth such amendment and therefore known as DAC8.
That implementation became effective on January 1, 2026. The practical consequence of a directive-based approach is uniformity: instead of 27 separate negotiations over scope and timing, the obligation lands on crypto-asset service providers across the bloc under a common legal basis, with each Member State transposing the same core requirements into national law.
The 2027 deadline that matters
The dates worth marking are next year’s. EU-based crypto-asset service providers are expected to submit their first reports under the framework in 2027, covering the activity that the January 2026 start date brought into scope. Separately but on the same timeline, the first international automatic exchanges of crypto-asset information between tax authorities are set to commence in 2027.
That sequencing explains why 2026 has felt quiet from a user’s perspective even though the rules are technically live. The obligation exists now; the filings and the cross-border transfers that give the obligation its effect arrive in the following year.
The technical plumbing
A framework of this kind is only as functional as the format in which data moves. To that end, the OECD released XML schemas and interpretative guidance on October 2, 2024, supporting the technical infrastructure needed for information exchanges between tax authorities. Schemas define the structure of the reports themselves, so that a filing generated in one jurisdiction can be parsed and acted on by an administration in another without bilateral custom work. Interpretative guidance addresses the definitional questions that inevitably surface once real providers begin classifying real transactions.
What a crypto-asset service provider actually has to report
CARF’s reporting obligation is built around the same logic as most financial account reporting: an entity that provides exchange or transfer services for crypto-assets on behalf of customers has to identify those customers, collect their tax residency information, and report the value and nature of transactions carried out through the platform to its home tax authority, which then shares that information with the tax authority of whichever jurisdiction the customer is a resident of. That structure is why the framework applies most cleanly to custodial exchanges and brokers, entities that already hold customer identity information as part of standard onboarding, and is far harder to apply to decentralized protocols where no single entity plays that intermediary role. The scope question, precisely which platforms and activities count as reportable under CARF, has been one of the more closely watched pieces of the framework’s implementation across participating jurisdictions.
Where the United States stands
The most significant gap in the framework’s coverage is the United States, which has not formally committed to CARF. Washington’s position is a continuation of a longer pattern: the US has consistently relied on its own FATCA regime rather than joining the OECD’s Common Reporting Standard-based system, and CARF, which is built on that same lineage, has drawn the same response.
That does not mean the US has no digital-asset reporting at all. It published compatible domestic digital-asset reporting rules in August 2023, the framework that produced the IRS Form 1099-DA reporting obligation for brokers. The result is two parallel systems that address a similar problem in a similar period, with the important difference that one plugs into a multilateral exchange network and the other does not.
That gap has a practical consequence for anyone whose crypto activity spans US and non-US platforms. A US-based exchange reports under the domestic 1099-DA regime, with data flowing to the IRS and, where a bilateral treaty or the older FATCA framework applies, potentially onward from there. An EU-based crypto-asset service provider reports under CARF, with data flowing automatically to every other participating jurisdiction’s tax authority starting in 2027, including, in principle, back to the United States if a bilateral arrangement covers it, even though the US has not joined CARF as a full participant. For anyone holding crypto across jurisdictions, the practical question from 2027 onward is less whether reporting exists and more which of these two systems a given service provider files into, and whether that provider’s home jurisdiction has any separate bilateral channel feeding information back to a jurisdiction outside CARF’s own network.