Korea tax agency demands reporting frozen crypto

TLDR

South Korea's tax authority now requires residents to report overseas crypto accounts even if the assets are frozen on bankrupt exchanges.

1. The National Tax Service ruled that frozen offshore exchange accounts remain reportable if balances exceed 500 million won at any month end.
2. The obligation targets disclosure, not automatically extra tax, but penalties for non reporting can reach at least 10 percent of the hidden value.
3. Korea is preparing broader crypto tax and data sharing rules, making offshore and stablecoin activity more visible from 2027 onward.

Deep Dive

1. What The Ruling Says

South Korea's National Tax Service (NTS) issued an August ruling that foreign crypto accounts must still be reported even when the exchange is bankrupt and withdrawals are blocked.

Under the foreign account rules, Korean residents must file if their combined overseas accounts, including foreign crypto exchanges, exceed 500 million won at any month end, with reports due each June of the following year.

The NTS clarified that an account opened with a foreign virtual asset service provider remains reportable as long as the underlying holding exists, regardless of whether the platform has suspended trading or withdrawals, as summarized in this NTS-focused explainer.

2. Who Is Affected And How

The ruling primarily affects Korean individuals and companies who held significant balances on offshore exchanges that later froze or collapsed, such as FTX type cases.

Key points:

1. Reporting is about disclosure, not automatically taxing the full frozen balance, but failure to report can trigger penalties starting at about 10 percent of the undeclared value.
2. Self custody wallets are explicitly excluded from this foreign account rule, since they are not accounts with overseas providers, though future income from those wallets can still be taxed under separate rules.
3. The NTS has not fully clarified how to value disputed bankruptcy claims, but recommends keeping detailed records of balances, court claims, and distributions.

3. Bigger Picture And What To Watch

The ruling sits inside a broader tightening of Korea's crypto tax and reporting regime.

From January 2027, a separate 22 percent tax on digital asset gains is planned for annual profits above 2.5 million won, covering activity on overseas exchanges and private wallets according to the same policy summary.

Korea also plans to join the OECD Crypto Asset Reporting Framework (CARF) in 2027, which will enable automatic cross border exchange of crypto transaction data and make under reporting of offshore holdings harder.

Conclusion

South Korea's tax agency is signaling that crypto held on failed or frozen offshore exchanges does not fall out of the reporting net just because users cannot withdraw it.

Combined with upcoming capital gains taxation and international data sharing, this points to a regime where large Korean crypto positions, especially offshore ones, are increasingly visible and subject to formal disclosure, which can influence where and how Korean traders choose to hold their assets.