What is the OECD Crypto-Asset Reporting Framework, and who does it affect?

What is the Crypto-Asset Reporting Framework?

CARF is a global tax transparency standard developed by the OECD and approved in 2023. It extends to digital assets the model that already governs bank accounts and investment portfolios: an intermediary identifies the tax residence of its customers, records specified transactions, files an annual report with its local tax authority, and that authority passes the information automatically to the customer's country of residence.

The reasoning behind it is straightforward. Crypto-assets can be transferred and held without a traditional financial institution in the chain, which placed them largely outside the existing Common Reporting Standard. CARF is intended to close that gap so that the visibility tax authorities gained over conventional assets is not eroded by the growth of digital ones.

Who has to report, and what is actually collected?

The obligation falls on what the framework calls Reporting Crypto-Asset Service Providers: businesses that effect exchange transactions in crypto-assets for or on behalf of customers. In practice this captures centralised exchanges, brokers, dealers, some custodial wallet providers, certain ATM operators and, in some interpretations, intermediaries in decentralised environments where a party exercises sufficient control.

What is reported is transaction level, not merely a year-end balance. Typical categories include:

• Identity and tax residence data for the customer, including a taxpayer identification number where one exists, and the same for controlling persons of an entity account.
• Exchanges between crypto-assets and fiat currency, in both directions.
• Exchanges between one crypto-asset and another.
• Transfers of crypto-assets, including, in many implementations, transfers out to wallets that are not held with a service provider.
• Certain retail payment transactions above a value threshold.

Aggregate values and unit numbers are generally reported by asset type. That is a materially richer dataset than the account balances exchanged under the older banking standard.

Which countries are involved, and when does it begin?

Commitment has been broad. Roughly fifty jurisdictions have indicated that they will undertake first exchanges in 2027, covering data collected during 2026. That group includes most of the European Union, the United Kingdom, Switzerland, Japan, Canada, Brazil, South Africa, Korea, and several insurance and financial centres including Bermuda, Luxembourg, Liechtenstein, Guernsey, Jersey and the Cayman Islands. A second group, which includes Singapore, Hong Kong, the United Arab Emirates, the Bahamas, the British Virgin Islands and the United States, has been associated with first exchanges by 2028.

Within the European Union the framework is given effect through the DAC8 directive, which member states were required to apply from 1 January 2026. The United Kingdom brought equivalent rules into force from the same date, with first reports to HMRC covering the 2026 calendar year. Dates, thresholds and penalty regimes are set nationally, so the position in any given country depends on local implementing law rather than on the OECD text alone.

How does CARF interact with the amended Common Reporting Standard?

Alongside CARF, the OECD amended the Common Reporting Standard, a revision often described as CRS 2.0. The two are designed to be complementary and to limit duplicate reporting of the same asset.

The practical consequence is that the same underlying exposure can be reported through different channels depending on how it is held. Direct holdings at an exchange fall naturally into CARF. Exposure obtained through a fund interest, a structured product or a cash value insurance contract is more likely to be analysed under the Common Reporting Standard, through the financial institution that maintains the account.

What does this mean for assets held inside regulated structures?

Where digital assets sit inside a regulated wrapper such as a life insurance policy, a trust with a corporate custodian, or a fund, the reporting analysis generally runs through the institution that maintains the account rather than through a crypto exchange. A policyholder, for example, holds a financial account with an insurance carrier, and it is the carrier that carries out due diligence and reports under the Common Reporting Standard in its jurisdiction. That is a difference in reporting channel, not a reduction in transparency: regulated structures are, if anything, more visible, more documented and more heavily due-diligenced than a self-directed exchange account.

This is worth stating plainly, because the direction of travel is sometimes misread. None of these frameworks make wealth invisible, and none of them are designed to. Their effect is that the information reaching tax authorities becomes more complete and more consistent, and that discrepancies between what a holder declares and what an intermediary reports become easier to detect. The value that families and advisers discuss in relation to structure is therefore about administration, succession, consolidation of records and long-term ordering of wealth, all within the applicable reporting rules, and not about concealment.

What are the limits of the framework?

CARF is not comprehensive. Assets held purely in self-custody, with no intermediary at any point, have no service provider to report them, although a transfer from a reporting provider to an unhosted wallet can itself be a reportable event, and assets re-entering a regulated venue become visible again. Genuinely decentralised protocols remain a difficult case, and jurisdictions have taken different positions on where control, and therefore an obligation, arises.

Data quality is a second constraint. Cost basis is frequently not reported, so an authority may receive gross proceeds without knowing the acquisition price. Where a holder has moved country, changed exchanges, or held assets for many years across several venues, the record that reaches an authority can be incomplete or misleading in ways that fall to the holder to correct. That is one reason contemporaneous record keeping has become a recurring theme in this area, and one of the more common practical questions families raise with their own advisers.

Finally, none of this changes the underlying economics of digital assets. They remain volatile and can lose value, and reporting obligations apply to losses as well as gains.