Hong Kong Passes Crypto Tax Reporting Law

Hong Kong has passed legislation implementing the OECD’s Crypto-Asset Reporting Framework, creating mandatory tax-information collection and reporting requirements for crypto businesses with sufficient ties to the jurisdiction. According to the Hong Kong Inland Revenue Department’s official November 4 announcement, CARF requirements will begin in 2027, with the first automatic exchanges of crypto transaction information with partner jurisdictions starting in 2028.

The Legislative Council’s approval completes the legislative phase of a process that began with Hong Kong’s CARF consultation in December 2025. The framework covers Reporting Crypto-Asset Service Providers, or RCASPs, that facilitate qualifying transactions for customers, including exchanges, brokers, dealers and certain other intermediaries. The reporting obligation depends on the provider’s activities and Hong Kong nexus rather than simply on whether a company handles blockchain technology.

Crypto Platforms Face New Reporting Requirements

From January 1, 2027, covered providers must begin due diligence procedures identifying users and controlling persons who may be reportable under CARF. Required identity information can include names, addresses, jurisdictions of tax residence, taxpayer identification numbers and, where applicable, dates and places of birth. Providers must also obtain tax-residency self-certifications and assess whether those declarations are reasonable.

The transaction perimeter extends beyond purchases and sales. CARF covers exchanges between crypto assets and fiat currencies, crypto-to-crypto transactions and transfers of relevant crypto assets, including transfers to external wallet addresses. Reports will aggregate transaction information by crypto asset, including gross amounts or fair-market values, units and transaction counts. The system gives tax authorities visibility into economic activity without requiring every individual blockchain transaction to be separately reported as a standalone record.

Hong Kong plans to open RCASP registration through a dedicated CARF Portal during 2027, with initial returns due in 2028 and the first international information exchange planned for September that year. Records supporting due diligence and reporting must generally be retained for six years. Compliance therefore begins well before tax authorities exchange the first dataset internationally.

CARF Expands Across Crypto Jurisdictions

Hong Kong joins a wider international move toward crypto tax transparency. Australia has similarly prepared CARF reporting legislation ahead of 2028 exchanges, while jurisdictions including the Cayman Islands have already incorporated the framework into domestic compliance systems. CARF creates an information-sharing layer rather than a global crypto tax: each jurisdiction retains its own rules for determining whether particular income or gains are taxable.

The distinction is important for Hong Kong’s broader digital-asset regime. The legislation does not replace licensing requirements or determine whether a particular crypto service may operate locally. Instead, it adds tax reporting and due diligence obligations alongside the regulatory frameworks already governing virtual-asset businesses, extending visibility across transactions that can move between centralized platforms and external wallets.

The bill simultaneously implements the OECD’s amended Common Reporting Standard, but on a different schedule. CARF takes effect in 2027 with exchanges from 2028, while the amended CRS begins in 2028 and international information exchanges under that standard start in 2029. Hong Kong is therefore creating two coordinated but distinct reporting tracks for crypto assets and conventional financial accounts.

The practical transition now shifts from legislation to implementation. The Inland Revenue Department plans technical guidance, a dedicated reporting portal and industry support ahead of the 2027 collection period. For covered crypto businesses, the immediate operational requirement is building systems capable of identifying tax residence and aggregating reportable transactions before the first CARF reporting cycle begins.