Key Summary
The Crypto-Asset Reporting Framework (CARF) is the OECD/G20 standard for the automatic exchange of tax-relevant information on crypto-asset transactions. It creates due-diligence and reporting obligations for Reporting Crypto-Asset Service Providers (RCASPs) and is being implemented through domestic legislation.
- RCASPs must identify reportable users and collect tax-residence and identification information, subject to the rules and exceptions of the implementing jurisdiction.
- Reportable activity includes exchanges between crypto-assets and fiat currencies, crypto-to-crypto exchanges and transfers of Relevant Crypto-Assets. CARF also defines a specific category for reportable retail payment transactions.
- As of July 2026, 76 jurisdictions were formally committed to implement CARF, with most expected to begin automatic exchanges by 2027. Implementation dates and domestic reporting deadlines vary.
What is CARF?
CARF stands for Crypto-Asset Reporting Framework. Developed by the OECD at the request of the G20, it extends automatic exchange of information for tax purposes to crypto-asset transactions. The framework is designed to give tax administrations more consistent visibility into relevant activity that can take place outside traditional financial intermediaries.
CARF defines crypto-assets broadly around digital representations of value that rely on cryptographically secured distributed-ledger technology or similar technology. The framework then narrows that universe to “Relevant Crypto-Assets” for reporting purposes.
Who is affected by CARF?
The OECD uses the term Reporting Crypto-Asset Service Provider (RCASP). An RCASP is an individual or entity that, as a business, provides a service that effectuates exchange transactions for or on behalf of customers, for example by acting as a counterparty or intermediary, or by making a trading platform available.
This can include exchanges, brokers and other trading intermediaries. Whether a wallet provider, decentralised platform, DeFi arrangement or NFT marketplace is in scope depends on what it actually does, its role in effectuating exchange transactions and the nexus rules of the relevant implementing jurisdiction. These categories should therefore not be presented as automatically in scope in every case.
When does CARF come into effect?
There is no single worldwide effective date. CARF is an international standard implemented through domestic legislation, so data-collection dates, reporting deadlines and exchange dates differ by jurisdiction.
|
Market |
Operational start / status |
First reporting / exchange |
|
Global |
76 jurisdictions formally committed as of July 2026. |
Most committed jurisdictions are set to begin automatic exchanges by 2027. |
|
European Union |
DAC8 applies from 1 January 2026. RCASPs collect reportable transaction data from that date. |
First 2026 exchanges take place by 30 September 2027; domestic filing deadlines/formats must be checked. |
|
United Kingdom |
CARF applies from 1 January 2026. |
First report: 1 January–31 May 2027, covering 2026. |
|
Switzerland |
The legal basis does not apply in 2026; implementation cannot occur before 1 January 2027 at the earliest. |
Dependent on completion of parliamentary deliberations and partner-state implementation. |
What falls under CARF?
CARF applies to Relevant Crypto-Assets. The OECD rules exclude three categories from that definition: Central Bank Digital Currencies (CBDCs), Specified Electronic Money Products, and crypto-assets for which the RCASP has adequately determined that the asset cannot be used for payment or investment purposes.
The broader scope can include stablecoins, derivatives issued in crypto-asset form and certain NFTs where the CARF conditions are met. Some assets excluded from CARF (including certain electronic-money products and CBDCs) may fall within the amended Common Reporting Standard instead, so classification should consider the interaction between both regimes.
What are the crypto tax reporting requirements?
RCASPs must apply due-diligence procedures to identify reportable users and the relevant tax jurisdictions, then report prescribed user and transaction information to the competent domestic tax authority under the local implementation of CARF.
Relevant transaction categories include:
- Exchanges between Relevant Crypto-Assets and fiat currencies.
- Exchanges between one or more forms of Relevant Crypto-Assets.
- Transfers of Relevant Crypto-Assets, including the specific CARF category of reportable retail payment transactions.
For each type of Relevant Crypto-Asset, the framework calls for aggregated transaction information such as amounts or fair-market values, numbers of units and numbers of transactions. Due-diligence information can include tax residence, tax identification numbers and other identity information, subject to the applicable rules and exceptions.
What is the impact of CARF on the market?
CARF is primarily a tax-transparency framework. It is intended to reduce gaps in tax authorities’ visibility of crypto-asset activity and to place crypto-asset reporting on a more comparable footing with existing automatic-exchange regimes.
For RCASPs, the immediate impact is operational: firms may need to enhance customer due diligence, jurisdiction mapping, instrument classification, transaction aggregation, data retention and reporting controls. The scale of that work depends on business model, customer footprint and the domestic rules that apply.
What are the risks associated with CARF?
- Jurisdictional variation: the standard is international, but filing dates, formats, penalties and nexus rules are implemented locally.
- Data quality: identifiers, instrument names, classifications, valuation data and transaction records need to be consistent enough to aggregate correctly.
- Customer due diligence: tax-residence self-certifications and controlling-person information may need to be collected, validated and maintained.
- Privacy and security: expanded tax-reporting datasets increase the importance of data governance, access controls and secure transmission.
- CARF/CRS interaction: firms need to identify assets and structures that fall into CARF, amended CRS or both, while avoiding unnecessary duplicate reporting.
Explore how SIX data equips you to navigate digital assets with precision and reliability.
Explore Crypto Asset DataWhy does SIX classify tradable utility tokens as CARF-relevant?
The label “utility token” does not automatically place an asset outside CARF. Under the OECD rules, the relevant question is whether the RCASP can adequately determine that the crypto-asset cannot be used for payment or investment purposes. A token that is transferable or tradable and can be held for payment or investment may therefore remain within the Relevant Crypto-Asset population, depending on the facts and applicable guidance.
This reporting classification is separate from tax treatment. CARF does not decide whether the purchase, use or disposal of a token creates a taxable event; that depends on the domestic tax law applicable to the user and transaction.
How does CARF relate to digital assets?
“Digital assets” is broader than CARF. Many digital assets can fall within CARF’s crypto-asset definition, including cryptocurrencies and certain tokenised instruments or NFTs, but reporting depends on the specific CARF definitions, exclusions and transaction rules. Firms should avoid treating every digital asset as automatically CARF-reportable.
What is the difference between CARF and CRS?
Both CARF and the Common Reporting Standard (CRS) are international automatic-exchange standards for tax information, but they focus on different data. CARF reports prescribed crypto-asset transactions. CRS primarily reports information on financial accounts, including balances and certain income or proceeds.
The CRS was amended alongside CARF to cover areas such as certain electronic-money products, CBDCs and indirect exposure to crypto-assets. The two standards include interaction rules intended to reduce duplicative reporting, making accurate asset classification important for institutions that may be subject to both.
What is the difference between CARF and MiCA?
CARF is a tax-transparency and information-reporting framework. The EU Markets in Crypto-Assets Regulation (MiCA) governs a broader set of crypto-asset market activities, including authorisation and conduct requirements for crypto-asset service providers and rules for certain token issuers. They can apply to the same business, but they serve different regulatory purposes.
How can SIX data support CARF reporting workflows?
SIX can support reporting workflows with reference data designed to make crypto-assets easier to identify, classify and aggregate consistently. Relevant data elements can include security identifiers, Digital Token Identifiers (DTIs), DTI-aligned instrument names, token classifications, CARF/CRS relevance indicators and pricing data.
These data elements can help RCASPs connect transaction records to a consistent instrument master and prepare reporting datasets. They support operational compliance processes but do not replace a firm’s legal, tax or regulatory assessment of its obligations in each jurisdiction.
SIX Crypto-Currency Reference Data - Examples
|
Instrument Name |
Valor |
ISIN |
Token Type |
DT/VA ID |
CARF-relevance |
|
Bitcoin (BTC) |
18789194 |
XTV15WLZJMF0 |
Payment token |
4H95J0R2X |
YES |
|
Ether (ETH) |
39891263 |
XTD5RG2FHH04 |
Utility token |
X9J9K872S
|
YES |
|
Official Trump (TRUMP) |
138939964 |
XTLJDPGNXXK4 |
Utility token |
3R313RR9C |
YES |
|
1.625 StLUG 29 Bds |
123210717 |
CH1232107172 |
Asset token |
RHFH6BHNM |
YES (also CRS-relevant!) |
|
CIRCLE Eurite (EURI) |
138939947 |
XTLGPZM7PJ93 |
Payment token |
LGPZM7PJ9 |
NO (but CRS-relevant!)
|
In CARF, Data Isn't Just Important - It's Everything
Kathelijne Marritt-Alers, Senior Product Manager, sat down with Jürg Stalder, Head of Tax & Regulatory Products, and Manuel Alonso, Senior Content Manager at SIX, to unpack the complexities of CARF.
Key questions explored in the interview:
- How is SIX supporting CASPs?
- What sets CARF apart from existing frameworks like FATCA and CRS?
- Can jurisdictional differences arise under a global standard like CARF?
- What types of data do CASPs need and how critical are accuracy and completeness?
- What technical considerations should CASPs keep in mind?
- Are there innovations in data tagging for CARF-relevant assets?
Discover how SIX is driving progress in crypto compliance through smarter data, watch the interview now.