South Korea's NTS Rules Bitcoin (BTC) on Bankrupt Exchanges Still Reportable Above 500 Million Won

Bankruptcy Does Not End the Filing Duty

South Korea's National Tax Service has ruled that cryptocurrency held on a bankrupt overseas exchange remains subject to the country's foreign financial account reporting regime, even when trading and withdrawals are entirely frozen. The interpretation, issued on Aug. 28, responds to a query from a Korean resident who was a creditor of an overseas exchange that entered bankruptcy in November 2022. After the collapse, the account holder could neither trade nor withdraw, and joined the estate's distribution process, receiving partial bankruptcy distributions into a domestic foreign-currency account.

The tax office nonetheless concluded that the original overseas account stays reportable, because it had been opened with a foreign virtual asset service provider specifically to trade digital assets. Its published interpretation draws a clear line between disclosure and taxation: filing an account does not by itself establish that tax is owed on the full balance, and the ruling does not resolve how a disputed or partially recoverable bankruptcy claim should be valued. The distinction matters because prior NTS guidance already excluded self-custody wallets — including those used to sign transactions on a dapp — from overseas account declarations, since they are not accounts opened with a virtual asset service provider. An exchange's insolvency, however, produces the opposite result: a customer retains a reportable account, or a claim against the exchange, even after losing normal control over the assets. Reporting obligations attach to the account itself, not to whether the customer can currently access the funds.

The 500 Million Won Threshold

Under Article 53 of the International Tax Adjustment Act, residents and domestic corporations must file when the combined balance of their overseas financial accounts exceeds 500 million won — roughly $350,000 — at the end of any single month during the year. Balances are aggregated across all qualifying foreign accounts, so the duty can trigger even when no single account crosses the threshold on its own. The report is due in June of the following year and identifies the foreign financial institution, the account details and the reportable balance. Digital assets entered this regime with the 2023 reporting cycle, so balances held on overseas venues — whether used for spot trading, staking or plain custody — now sit alongside foreign deposits, securities and funds. That framing creates a valuation problem the published summary does not fully settle: an exchange interface may still display an original token balance, a figure detached from any trading volume or realized recoveries, while the bankruptcy estate cannot return the full amount. Affected holders may need monthly balance records, exchange statements, bankruptcy claims and distribution receipts to reconcile what was reported against what was actually recovered.

Figures attributed to the National Tax Service show overseas digital asset disclosures of 10.5 trillion won in the 2026 cycle, down 5.4% from the prior year. Individual holdings rose 5.4% to 9.8 trillion won, while corporate holdings dropped 61.1% to roughly 700 billion won — a decline the agency attributes to broadly lower asset prices. Total reported overseas financial accounts reached 107.1 trillion won, filed by 7,484 individuals and companies, a 9.1% increase in filers. The disclosure duty is separate from South Korea's planned tax on cryptocurrency gains, a combined 22% levy on qualifying digital asset income from Jan. 1, 2027, which will also capture activity on offshore venues and private wallets. For retail investors weighing which platforms to trust with custody, our guide to the Best Crypto Exchanges covers the counterparty and jurisdiction risks that exchange insolvency puts in sharp relief. Readers tracking the market in real time can follow live spot and futures prices on MEXC.

What the Ruling Signals Before 2027

COINOTAG's reading of the primary document is straightforward: this is an interpretive ruling under existing law, not new legislation. It binds Korean residents and domestic corporations from its Aug. 28 issuance and changes no thresholds or deadlines. Its significance is prospective. With the 22% income tax arriving in 2027 and South Korea preparing to exchange crypto transaction data under the OECD's Crypto-Asset Reporting Framework, a frozen balance can no longer be assumed to sit outside the reporting net. Creditors of failed platforms should treat record-keeping as the core compliance task, since the gap between a reported balance and a final distribution is where future scrutiny will land.