When a parent passes away in South Korea, a child’s U.S. citizenship does not exempt them from tax obligations, nor does it automatically mean inheritance tax is owed in both countries. Tax liability depends on the parent’s residency status, citizenship, and the geographic location of the assets.
1. Korean Inheritance Tax Obligations
If the deceased parent was a Korean tax resident at the time of death, their worldwide estate is subject to Korean inheritance tax. If the parent was a non-resident, Korea taxes only assets physically situated within South Korea. A child’s foreign citizenship does not change these rules.
The standard filing and payment deadline is six months from the last day of the month in which the death occurred. However, this deadline is extended to nine months if either the deceased or an heir maintains an address outside of Korea. Note that holding foreign citizenship alone does not automatically trigger the nine-month extension unless an overseas address condition is met.
2. U.S. Tax Treatment of the Inheritance
Under U.S. federal tax law, an inheritance itself is generally excluded from taxable income. If the deceased parent was neither a U.S. citizen nor domiciled in the U.S. for estate tax purposes, their foreign (Korean) assets generally fall outside the scope of U.S. federal estate tax. However, any U.S.-situated assets (such as U.S. real estate or certain securities) left behind may still trigger separate U.S. estate tax and filing requirements.
3. Mandatory U.S. IRS Reporting
A U.S. citizen who receives aggregate gifts or inheritances exceeding $100,000 during a single tax year from a nonresident alien or foreign estate must report the receipt to the IRS. Related-party aggregation rules apply. This reporting requirement applies to cash, property, and physical assets, even if the inherited assets remain in South Korea. While reporting the inheritance does not automatically mean tax is owed, failing to file or submitting incomplete information can result in steep IRS penalties.
4. Ongoing Obligations for Inherited Assets
Subsequent interest, dividends, rental income, and taxable capital gains generated by the inherited assets can create ongoing U.S. income tax reporting obligations. Inheriting Korean financial accounts may subject the child to foreign account reporting. If the combined aggregate balance of all foreign financial accounts exceeds $10,000 at any point during the calendar year, an FBAR (FinCEN Form 114) must be filed. Additional asset disclosures (FATCA) may also apply if balances exceed higher separate thresholds.