On 26 February 2026, the Korean National Tax Service and Thailand’s Revenue Department met in Seoul.
At that meeting, the two authorities signed a formal Memorandum of Understanding to deepen cooperation in tax administration. The announcement focused on expanded exchange of financial information, cooperation in tracking hidden overseas assets and future sharing of virtual asset transaction data. You can read the official announcement in Korean here.
For Korean nationals living in Thailand, this is an important development. Here is what it means in practical terms.
Exchange of Financial Information Between Korea and Thailand
Korea and Thailand already cooperate under existing treaty and information-exchange arrangements. This new agreement reinforces and expands that cooperation, with a clear emphasis on identifying undisclosed offshore income and assets.
If you are a Korean tax resident, or if you remain subject to Korean overseas reporting rules, Thai bank accounts and financial assets may be visible to Korean tax authorities.
This does not create a new tax. However, it increases the likelihood that undeclared foreign bank accounts may be identified, overseas income that should have been reported in Korea becomes traceable and mismatches between declared income and known assets are detected.
For compliant taxpayers, this is an administrative development rather than a threat. For those who have not fully disclosed overseas holdings, the environment is becoming more transparent and more structured.
How Cross-Border Tax Collection May Affect Korean Expats
One of the more significant elements discussed was collection cooperation. The Korean National Tax Service proposed establishing systems to allow faster recovery of unpaid tax where concealed assets are found in the partner country.
If a Korean taxpayer has outstanding liabilities in Korea and holds assets in Thailand, the ability of the authorities to cooperate in enforcement may improve.
For most expats with clean tax records, this will have no practical impact. However, anyone who left Korea with unresolved tax issues, has ongoing tax disputes or has moved assets abroad during an investigation should recognise that cross-border enforcement capacity is strengthening.
Korea and Thailand to Share Crypto Transaction Data from 2028
According to the tax authorities’ announcement, from 2028, the scope of information exchange is expected to expand to include virtual asset transaction data. This reflects the global push towards transparency in cryptocurrency holdings and transactions.
If you are trading through Thai exchanges, holding digital assets on platforms operating in Thailand or running crypto-related businesses and you remain subject to Korean tax residency or Korean overseas reporting obligations, it will become increasingly difficult to keep these holdings outside the Korean reporting framework.
Again, this does not introduce a new tax. It increases visibility.
Global Minimum Tax and Korean Businesses in Thailand
The meeting also addressed support for Korean companies operating in Thailand, including double taxation issues, tax administration guidance and implementation of the OECD global minimum tax.
This aspect is primarily relevant to multinational groups with annual revenues above €750 million. It is less directly relevant to individual employees or retirees.
However, if you are a Korean expat who owns or manages a Thai company, improved coordination between the two tax authorities may provide clearer guidance and reduce uncertainty.
Why International Tax Transparency Is Increasing
This agreement fits into a wider international pattern. Tax authorities worldwide are increasing information exchange and cross-border cooperation in enforcement, data sharing on digital assets and greater alignment under OECD frameworks.
Thailand and Korea are reinforcing their participation in that global system.
For Korean expats in Thailand, the message is clear. Transparency is increasing. Cross-border visibility is improving. Compliance expectations are rising.
What Korean Expats in Thailand Should Do Now
For most Korean nationals living in Thailand, this development is not a cause for alarm.
You are unlikely to be affected if you correctly report worldwide income where required, comply with Korean overseas financial account reporting rules if applicable, meet your Thai tax filing obligations and maintain accurate records of cross-border transactions.
However, it may be sensible to review your position if you are unsure about your Korean tax residency status, maintain significant financial assets in Thailand, hold crypto assets across jurisdictions or have unresolved Korean tax matters.
This agreement does not introduce new taxes. It strengthens cooperation and information flow.
For compliant Korean expats in Thailand, it confirms what has been clear for some time. Cross-border transparency is now the norm.
Need Further Assistance?
If you are unsure how this agreement affects your personal tax position, contact our expat support team. We are here to help you review your situation with clarity and confidence.
