South Korea orders reporting of locked crypto

TLDR

South Korea has clarified that residents must report overseas crypto holdings even if their coins are locked or stuck on bankrupt exchanges.

1. The National Tax Service says foreign exchange accounts holding crypto, including frozen balances, are covered by existing foreign-account disclosure rules above 500 million won.
2. Self-custody wallets are exempt, but failing to report qualifying overseas exchange accounts can trigger penalties, even when the user cannot currently withdraw their coins.
3. A separate 22 percent crypto gains tax starts in 2027, and authorities still need to clarify how staking, airdrops and frozen-balance valuations will be handled.

Deep Dive

1. What Must Be Reported

South Koreas National Tax Service (NTS) has confirmed that residents must declare cryptocurrencies held on foreign exchanges under the countrys foreign-account disclosure rules, even when the exchange is bankrupt or withdrawals are blocked. This clarification came in response to a case involving an overseas exchange collapse in 2022 and is detailed in an NTS-focused community explainer.

Under Article 53 of the Act on International Tax Adjustment, Korean residents and companies must report all overseas financial accounts, including digital assets, when their combined balance exceeds 500 million won (about 350,000 dollars) at the end of any month in the year. Reports must name the foreign institution, provide account details and disclose the balance.

Self-custody wallets are not treated as overseas financial accounts, so they are outside this specific reporting rule.

2. Why Locked Crypto Still Counts

The key point is that the reporting obligation attaches to the account, not to whether you can currently access the funds. If you had tokens on a foreign exchange that later went bankrupt, you still have to report that account if it meets the threshold.

This creates valuation challenges, because failed exchanges may show pre-collapse balances even though users expect only partial recovery over years of court processes. The NTS guidance confirms that bankruptcy or blocked access does not nullify the duty to disclose.

3. What To Watch Next

South Korea plans a separate crypto gains tax from 1 January 2027, applying a 22 percent rate on annual profits above 2.5 million won. Authorities have not yet fully clarified how staking, airdrops or cost-basis rules will work.

Further guidance is also needed on how exactly to value frozen balances for disclosure and how aggressively under-reporting will be enforced. Internationally, more countries are tightening cross-border crypto reporting, so Korean rules may keep evolving alongside global standards.

Conclusion

South Korea is signaling that visibility into offshore crypto exposure matters more than whether assets are currently usable. For Korean crypto users, the main shift is compliance and documentation, especially around foreign exchanges and legacy stuck balances, rather than new trading bans or custody restrictions.