Author: FinTax
Basic Impact Logic of CARF
With the advancement of CARF, the ability of tax authorities in various countries to obtain overseas crypto asset information will be significantly enhanced.
CARF does not create tax rules but enables tax authorities to identify crypto asset income obtained by their tax residents abroad through automatic information exchange.
On the basis of information transparency, it may become common practice to recover taxes and enforce penalties on undeclared income.
For countries that have committed to joining CARF and implemented it through legislation, the crypto asset account and transaction information of their tax residents on overseas exchanges will be exchanged among tax authorities through the CARF mechanism. Tax authorities can use this information to cross-check tax declarations and impose penalties for omissions or underreporting.
CARF Participants: Retrospective Taxation After Information Transparency
Taking the UK as an example, starting in 2026, the UK has required local crypto asset service providers to systematically collect user transaction data for tax verification. Her Majesty's Revenue and Customs (HMRC) has explicitly stated that it will use relevant data to cross-check personal tax records. If undeclared crypto asset gains are found, taxes will be recovered and penalties imposed in accordance with the law.
In such jurisdictions, once crypto asset transaction information enters the purview of tax authorities through CARF, there is a real risk of retrospective taxation on previously undeclared overseas crypto income.
Key Risk Point: Conversion of Crypto Assets
Mainland China has not yet joined CARF, so tax authorities cannot automatically obtain information about crypto asset accounts held by Chinese residents on overseas exchanges through CARF in the short term. If current policies remain unchanged, the risk of being directly discovered and having taxes recovered by domestic tax authorities solely for holding crypto assets overseas is relatively low.
However, this assessment only applies while crypto assets remain within the crypto ecosystem. Once crypto assets are converted into fiat currency and enter bank accounts or other financial account systems, the risk pathway changes.
Mainland China has fully implemented CRS since 2018 and conducts automatic exchange of financial account information with multiple jurisdictions. Under the CRS framework, Chinese tax authorities already have practical enforcement cases of recovering taxes through overseas financial account information.
Therefore, even if Mainland China has not yet participated in CARF, once crypto assets are liquidated through overseas exchanges and stored in financial accounts, the relevant information may still be transmitted to domestic tax authorities through CRS or other channels.
Existence of Other Tax Information Channels
Under existing tax treaties and enforcement cooperation mechanisms, tax authorities in various countries can exchange tax-related information of specific taxpayers through case-by-case investigative cooperation.
If tax authorities of other countries discover large-scale tax evasion or illegal transactions involving Chinese residents during enforcement, relevant clues may also be provided to the Chinese side through bilateral mechanisms.
