Korea's Tax Chief Lim Kwang-hyun Admits Personal Wallet Transfers Evade Capture Ahead of Jan 1, 2027 Levy

Wallet Transfers Stay Outside the Net

Korea's top tax official conceded on Tuesday that some digital asset transactions remain beyond the tax collector's reach, and with the levy now fixed for Jan 1, 2027, the admission landed three months before the start date. Testifying at the National Assembly's Strategy and Finance Committee audit held at the Government Sejong complex, National Tax Service Commissioner Lim Kwang-hyun told People Power Party Rep. Park Soo-young that transfers between personal wallets and other hard-to-capture segments are a problem for every country that already levies the asset class, not Korea alone, and described the gap as “a problem time will have to solve.” He added that tax authority chiefs keep discussing at international commissioners' meetings how to cooperate and how to catch new transaction types. Under the enacted schedule, gains accrued in 2027 become taxable, with first filings due in May 2028, and Lim said the agency is preparing so that it can execute whichever start date is set without delay. The exchange side looked weaker. According to responses the committee collected from the venues, Upbit has begun building its tax system, Bithumb has not started development, Coinone postponed the work until the tax legislation passes, Korbit is verifying interfaces and Streami is still reviewing design directions. Park argued that with roughly three months left, systems should already be built and in testing, and flagged errors in non-resident withholding, inconsistent tax bases across exchanges, and difficulty identifying income from staking, airdrops, DeFi and token swaps. Lim replied that the service is coordinating with exchange practitioners and, “because you pointed it out, we will check once more.”

Kimchi Premium Swaps and Split Transfers

Democratic Party Rep. Ahn Do-geol used the same hearing to press the harder enforcement question: how the service tracks evasion methods that already outpace rule-based audits. His first target was the kimchi premium, the persistent gap between domestic and overseas digital asset prices. Funds disguised as trade payments or study-abroad remittances are sent abroad, converted into digital assets there and brought back into Korea, a round trip known as hwanjigi that Ahn said is growing. He also cited asset concealment and disguised gifting through domestic exchanges, illicit fund movement routed through offshore venues, and a newer pattern in which gains and dividends from real-world-asset tokens and newly issued tokens are shifted into offshore blind spots. The volume problem matters as much as the structure problem. Ahn described markets where high-frequency algorithmic trading and mixing technology produce thousands of split transfers in real time, and argued that reacting after the Financial Intelligence Unit's suspicious transaction reports arrive is too slow to catch any of it. What the tax authority needs, in his words, is an AI-based detection system that cross-references transaction data and catches abnormal patterns early, combined with broader exchange of trading information under the OECD's Crypto-Asset Reporting Framework, the global standard for automatic cross-border data sharing that Korea can join to obtain foreign transaction records. Lim answered that managing the digital asset tax base is one of the service's biggest tasks, confirmed a dedicated virtual asset division has been created to build the needed systems, and said the agency is “making every effort,” including buying and installing an overseas tracking program if required.

Our reading of the session is that the two exchanges of the same morning, from opposite sides of the aisle, converge on one point: the infrastructure is the bottleneck, not the law. A statute already enacted, with a Jan 1, 2027 levy and a May 2028 first filing, leaves little slack if Bithumb has not started development while Upbit has only begun. Patterns newer than the ones Park listed, such as flash loans, uncollateralized borrows repaid inside a single transaction, and trading activity on Layer 2 networks, where settlement is cheaper and faster, will only widen the income-classification gap. The practical lever is data: Korea's use of the OECD framework, plus the promised tracking software, is where the distance between three months and actual readiness gets tested.