South Korean crypto holders must still report even if overseas crypto exchanges collapse

South Korea’s National Tax Service ruled on August 28 that a resident who holds crypto at an overseas exchange must still declare that account under the country’s foreign-account disclosure rules.

The rule still applies even when the overseas exchange collapses and locks the holder out of trading or withdrawals. The rule lands months before Seoul begins taxing crypto gains in January 2027.

Why did South Korea ask users to report holdings even if crypto exchanges collapse?

A question asked by a Korean resident was what gave rise to the latest ruling. The resident was a creditor of an overseas crypto exchange that went bankrupt in November 2022.

According to the National Tax Service, the resident held token balances on the platform before the collapse. Later, they joined the estate’s distribution process and began receiving partial payouts into a domestic foreign-currency account.

The resident then asked the tax agency if reporting overseas financial accounts under Article 53 of Korea’s Act on International Tax Adjustment still applies in the event of an account getting stuck in bankruptcy limbo, where they cannot trade or withdraw; the tax agency said yes.

The agency said that an account opened with a foreign virtual-asset service provider retains the reporting obligation, and the duty survives the operator’s bankruptcy.

What the disclosure rule actually requires

Korean residents and domestic companies must report their overseas financial accounts when the combined balance tops 500 million won, which is around $350,000, on any month-end during the year. 

The filings must identify the foreign institution, the account, and the balance.

Digital assets have counted toward this regime since the 2023 reporting cycle. However, self-custody wallets are not included, as they are not accounts opened with a service provider. 

This time around, the new ruling extends that line to say that insolvency does not release an exchange from disclosure, even when the holder has effectively lost control of the assets.

A valuation headache for frozen balances

Reporting an account is not the same as owing tax on it. However, some Koreans may struggle to prove that the balances on their overseas exchange accounts are already gone or inaccessible.

This is because the interface of a bankrupt exchange may still show a customer’s original token balance long after the estate has become unable to return the full amount.

In some cases, the amount that later gets distributed is a fraction of the original balance. 

This exercise can take years, and an example is the FTX estate, which only began paying creditors long after customers lost access to their funds.

According to the tax agency, Koreans reported 10.5 trillion won in overseas digital assets during the 2026 cycle; this is a 5.4% decline from a year earlier. 

Separate from the 22% tax landing in 2027

The disclosure rules are not the same as the levy on crypto profits, although the latter is yet to come into force, as Cryptopolitan reports.

From January 1, 2027, the country plans a combined 22% rate, 20% national plus 2% local, on annual gains above 2.5 million won.

So far, the tax agency has not shared how it intends to handle staking, airdrops, or how acquisition costs are calculated. Critics say that defining new taxable events by administrative notice is in opposition to Korea’s “no taxation without law” principle.

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