Complete Guide · 2026

Korean Inheritance for US Citizens: The Complete 2026 Guide

Each year, thousands of Korean-American families confront a difficult reality: a parent who emigrated to the United States — or who remained in Korea — passes away owning Korean property, bank accounts, or business interests. For the US-based heirs, the path forward involves two tax authorities, two languages, and two strict deadlines.

This guide explains the essentials. For your specific situation, our free calculator and AI consultation provide instant estimates.

Step 1: Determine the Decedent's Residency Status

This single fact changes everything about the Korean tax bill.

"Korea resident" is defined under the Korean Income Tax Act — generally, having a domicile in Korea or staying 183+ days in the past year. Holding Korean citizenship alone does not make someone a resident. A parent who lived in the US for decades is typically a Korean non-resident, even with a Korean passport.

Step 2: Inventory the Korean Assets

All Korean-situated assets must be reported to the Korean tax authority: real estate (아파트, 토지, 상가), Korean bank accounts, Korean stocks, private business interests (지분), insurance proceeds, vehicles, and intellectual property. Valuation uses fair market value as of the date of death. If you don't know what your parent owned, Korea's Inheritance Asset Search Service (상속재산조회) provides a consolidated lookup.

Step 3: Understand the Korean Inheritance Tax Rates

Korea applies a progressive rate from 10% to 50% across five brackets. After deductions, residents typically pay a 10-25% effective rate on estates between ₩1B-5B; non-residents pay nearly double.

Step 4: The US Side — Form 706, Not Form 3520

This is the most common misconception. If your parent was a US citizen or US-domiciled green card holder, they are a US person — not a foreign person — so Form 3520 does not apply.

Instead, Form 706 (US Federal Estate Tax) is filed by the estate's executor if the worldwide estate exceeds the 2026 exemption of $15 million. Most Korean-American families fall under this exemption and owe no US federal estate tax. Even below the threshold, filing may benefit you for portability and stepped-up basis documentation.

To avoid double taxation, Form 706-CE claims a foreign death tax credit for Korean inheritance tax paid (IRC §2014). Read our dedicated Form 706 guide.

Step 5: Mind the 9-Month Deadline

Korean inheritance tax for overseas heirs is due 9 months from the end of the month of death. US Form 706 is also due in 9 months. The Korean payment must clear first so you can claim the Form 706-CE credit. See our deadline guide.

Common Mistakes

• Missing the deadline because heirs live in the US and aren't aware
• Filing Form 3520 when Form 706 actually applies (US-person decedent)
• Selling Korean property before filing, triggering complications
• Hiring only a US CPA who doesn't understand Korean tax law
• Keeping inherited Korean mutual funds — the PFIC trap

General information only, not legal advice. Operated by a licensed Korean CPA & Tax Accountant. US tax matters are referred to partner US-licensed attorneys. Consult a qualified professional for your specific situation.