Case Studies
Case Study: High-Net-Worth Exit Tax and Residency Restructuring
Examining how an HNWI leaving Korea must manage exit taxation, residence status, and overseas assets disclosures, using concrete numbers.
By NomadicTax Research Team • 5-8 min read • September 14, 2026
## Context: Exit Tax in South Korea
Korea imposes an **exit tax** on individuals who cease Korean tax residency while holding certain assets with unrealised gains. Under *International Tax Adjustment Act (ITAA)*, when a person resides in Korea for 5 of previous 10 years and then gives up residency, they are deemed to have sold certain property at fair market value, triggering tax on the gain. This covers **shares, crypto, etc.** (exclude real property in some cases). Amounts below certain thresholds may be deferred or exempt if assets are held for a period. Advisory sources: PwC Korea exit tax brief.
## Hypothetical Profile: Mr. Kim
- Mr. Kim lived in Korea for **7 of the past 10 years**, amassed **unrealised gains** in foreign stock ($2M USD), crypto ($500K), and shares in private Korean companies.
- He plans to emigrate - give up Korean residency on **November 1, 2026**.
### Exit Tax Implications
- Upon exit, gains on overseas shares and crypto are **deemed realised** at their fair market value as of that date. He pays exit tax on gains calculated as FMV minus acquisition cost. Rental or other gains in crypto may be taxed similarly.
- He must file overseas financial accounts and trusts reporting for the final year (2026), including those assets. Failure to report can lead to fines, criminal liability, and possible **public disclosure**.
## Restructuring Strategies
1. **Timing the exit**: Delay exit until after 2026 if you expect adverse crypto tax changes in 2027. Or accelerate disposal before becoming non-resident if future rates increase.
2. **Use vehicle structures** (e.g., foreign trust or holding company) to defer or shift tax liabilities. But Korean law looks through trusts in many cases if resident control or benefit exists.
3. **Leveraging treaties**: If moving to a country with a tax treaty, negotiate whether exit gain might be taxed there instead, or whether credits will apply.
4. **Document cost basis and fair values** now. Keep records for crypto purchase costs and FMVs to support exit tax calculation.
## Practical Example Numbers
| Asset Class | Acquisition Cost | Fair Market Value (Exit Date) | Exit Gain Subject to Tax |
|---|---|---|---|
| Foreign stocks | $1,200,000 | $2,000,000 | $800,000 |
| Crypto | $200,000 | $500,000 | $300,000 |
| Private Korean shares | N/A / early shares | Valued at $300,000 | Gain depends on internal valuation and whether treated under exit provisions |
If exit tax rate is, for example, **22%**, Mr. Kim owes tax: (800,000 + 300,000) × 0.22 = **$242,000 USD** (plus any tax on private shares). Plus costs for compliance.
## Action Plan Before You Exit
- **Lock in acquisition costs**: Translate foreign currency gains and losses; gather historic statements.
- **Report all overseas assets** including crypto and trusts in year of exit (file overseas account and trust disclosures by June of the following year).
- **Consider pre-exit gifts or transfers**: Sometimes moving assets to spouse or trust (but beware anti-avoidance rules).
- **Consult local and destination country tax counsel**: Especially for US, EU, etc., which may have different exit tax or residency rules.
## Outcome and Risks
Proper planning can significantly reduce tax exposure. Failure to do so often leads to steep exit tax bills, penalties for non-reporting, and perhaps being treated as a resident for longer than intended due to untidy documentation. For HNWIs, even small missteps cost tens of thousands or more—always plan early.