CARF and the amended CRS: reporting readiness for cross-border families holding digital assets

Hong Kong remains at the legislative stage

The relevant bill was gazetted in May 2026 and introduced for first reading in June. The Inland Revenue Department expressly states that it remains subject to Legislative Council scrutiny. If enacted, CARF-related amendments are intended to apply from 1 January 2027, the amended CRS from 1 January 2028, and Hong Kong aims to begin its first automatic CARF exchanges in 2028. These are planned dates, not statutory deadlines already in force.

CARF and CRS observe different data relationships

CRS is organised primarily around financial accounts and investment entities. CARF starts with reporting crypto-asset service providers effecting relevant transactions for clients, collecting tax-residence information on users and controlling persons and reporting transactions under the rules. The amended CRS is also intended to cover certain digital financial products and entities investing in relevant crypto-assets. Coordination between the regimes does not mean every data point need be prepared only once.

No bank account does not mean no reportable activity

CARF uses functional definitions. Relevant activities may include exchanges between crypto-assets and fiat currency, exchanges between relevant crypto-assets, and transfers to users or external wallet addresses. Self-custody does not automatically make transactions previously conducted through a service provider untraceable. Families need to connect on-chain addresses, exchange records, bank flows and beneficial owners.

Data governance is often harder than the form

A family may hold assets through individuals, companies, trusts, foundations or investment entities while using multiple exchanges, brokers, custodians and self-hosted wallets. Place of formation, place of management, tax residence, controlling persons and links to service providers can all affect classification. Relocation, a new status, a change in management location or a change of trust control may also make a long-standing self-certification inaccurate.

Preparation begins with a reconcilable asset map

Reliable records should capture original cost, time, asset type, on-chain transaction identifier, wallet address, fiat inflows and outflows and the purpose of inter-entity transfers, and reconcile to bank and provider statements. Building that record now does not predetermine the reporting conclusion. It allows tax and legal advisers to reclassify from consistent evidence once final rules are settled, rather than reconstructing years of activity before a deadline.

Identity and control changes require a continuing record

Tax residence, self-certification and controlling-person data are not permanent once collected at onboarding. Relocation, a new status, changes in trust powers, directors or place of management may require an existing classification to be updated.

Families should use an event-trigger list so legal, tax and investment teams update entity files, service-provider records and wallet or account mappings when a change occurs, rather than discover inconsistencies during annual reporting.

G70 conclusion: build the evidence architecture before deciding classifications

The final application of CARF and the amended CRS should be determined by qualified tax and legal advisers under the enacted law. The family office can create value now by ensuring that transactions, identity, control and cash flows can be reconstructed and reconciled.

With a sound evidence architecture, future classification changes require a rule update. Without it, even a correct understanding of the rules may not reconstruct years of cross-platform and on-chain activity accurately.