South Korea is making final preparations to implement income tax on crypto assets by 2027. Local media, citing a response from the South Korean National Tax Service to members of parliament, reported that the tax authorities plan to introduce commercial blockchain tracking software to analyze the flow of digital assets between private wallets, in order to improve their ability to identify unreported transactions.

Private wallets to be included in the tax collection scope

This arrangement points to a long-standing challenge: when assets are kept by taxpayers themselves, it is more difficult for tax authorities to obtain complete records directly, as compared to reviewing accounts on centralized exchanges. The South Korean National Tax Service also acknowledges that private wallet transactions are inherently harder to fully identify, but they will continue to advance the construction of relevant systems to reduce loopholes in tax collection and management.

According to the current schedule, South Korea will start taxing earnings from eligible crypto assets from January 1, 2027. After deducting 2.5 million Korean won from the annual income, a national income tax of 20% will be applied, plus an additional 2% local income tax, resulting in a total tax rate of 22%.

• Effective date: January 1, 2027
• Deduction amount: 2.5 million Korean won per year
• Combined tax rate: 20% national tax plus 2% local tax

Overseas platforms will integrate CARF data.

The South Korean Ministry of Economy and Finance and the National Tax Service have previously explained to members of the National Assembly that income generated from the transfer or lending of digital assets is not exempt from taxation just because the assets are stored in private wallets or overseas exchanges. In other words, self-hosting does not change the tax obligation.

In addition to private wallets, South Korea is also establishing channels for information acquisition for transactions on overseas platforms. The authorities plan to rely in part on the OECD encrypted asset reporting framework CARF to obtain reportable transaction data from overseas platforms through automatic information exchange between judicial jurisdictions.

One focus surrounding CARF is that in some regions, the initial exchange of information occurred later than the effective date of South Korea's crypto tax. Taking the United Arab Emirates as an example, the local CARF regulations apply for the 2027 calendar year, and the first exchange of information is expected to take place in 2028. South Korea believes that this timing will not create a gap in tax administration, as the data exchanged in 2028 corresponds to transactions that occurred in 2027, and South Korea's first round of tax declarations is also scheduled for May 2028.

Exchanges and monitoring systems are preparing in sync.

The South Korean tax authorities have completed the development of a tax source management system and are continuing to build a comprehensive digital asset tax analysis system. At the same time, the National Tax Service is discussing implementation details with local trading platforms such as Upbit, Dunamu, Bithumb, Coinone, Korbit, and Gopax, with a focus on transaction records and the information required for calculating taxable income.

The South Korean government has also recently tightened regulations on transfers related to self-hosted wallets and overseas platforms. New regulations approved in August require domestic exchanges to operate internal systems for monitoring suspicious transactions for transfers involving overseas exchanges or private wallets of over 10 million Korean won. For high-risk counterparties, platforms may impose transfer restrictions; more extensive Travel Rule requirements will also apply to transfers between registered virtual asset service providers in South Korea.

In addition, in July, South Korean regulatory authorities also proposed a framework for seizing self-hosted crypto assets, in an attempt to manage assets controlled by private keys. This indicates that the management of self-hosted assets on the blockchain by tax and law enforcement departments is also being strengthened in parallel.

Differences still exist regarding tax arrangements

South Korea's crypto tax has been postponed several times, with the implementation date being moved from 2022 to 2023, then to 2025, and finally to 2027. Although the government finalized this schedule when it proposed the tax reform in August, the National Assembly still has the authority to amend the relevant provisions before it officially takes effect.

Currently, there are still individuals within the ruling party, the National Power Party, who are advocating for the abolition or further postponement of this tax. Some members of parliament suggest delaying its implementation until 2030, arguing that the taxation may lead to more South Korean funds flowing to overseas cryptocurrency platforms. However, considering the progress made in tax system construction, cross-border reporting, and the preparation of wallet tracking tools, the South Korean government is still moving forward with the plan to implement it by 2027.