Buying a home in the United States does not, by itself, create an annual U.S. federal income tax filing obligation. However, rental activity, a property sale, or an existing tax election may require filing. Property taxes and Korean reporting obligations must also be managed separately.
First, Confirm Your U.S. Tax Status
A Korean citizen living in Korea will generally be a nonresident alien for U.S. income tax purposes if they do not meet the green card test or substantial presence test, subject to applicable exceptions and elections.
Purchasing U.S. property does not itself establish U.S. tax residency. Citizenship, immigration status, and tax residency are separate matters.
When Is a U.S. Tax Return Required?
For a nonresident alien who owns a home directly for personal use or leaves it vacant, ownership alone generally does not require an annual federal income tax return.
Rental property requires additional attention. Rental income that is not effectively connected with a U.S. trade or business is generally taxed at 30% of gross income, subject to applicable treaty provisions. Depending on the circumstances, a return may not be required if withholding fully satisfies the tax liability.
Alternatively, an eligible owner may elect under Section 871(d) to treat rental income as effectively connected income, allowing attributable deductions and graduated tax rates on net income. Once this election is made, Form 1040-NR must be filed annually while it remains in effect—even in a year without rental income.
Selling U.S. real estate generally requires a U.S. tax return. The sale may also be subject to FIRPTA withholding, generally 15% of the amount realized, although exceptions and reduced withholding may apply. This withholding is a payment toward the tax liability, rather than necessarily the final tax due.
Do You Need an ITIN?
If you have a federal tax purpose and are not eligible for a Social Security Number, you may need an Individual Taxpayer Identification Number (ITIN).
An ITIN does not grant immigration status or employment authorization, determine U.S. tax residency, or independently create an annual filing obligation.
Property Taxes and State Requirements
Applicable real estate taxes, usually administered locally, remain payable regardless of rental income. Rates, exemptions, and payment schedules vary by location. State income tax filing requirements should also be checked separately.
Overseas Property Reporting in Korea
Under Article 58 of Korea’s Adjustment of International Taxes Act, qualifying overseas property transactions create separate reporting obligations.
For a Korean resident purchasing U.S. property:
- Acquisition value of KRW 200 million or more: applicable acquisition, rental operation, disposal, and year-end ownership information must be submitted.
- Acquisition value below KRW 200 million but disposal value of KRW 200 million or more: disposal information must be submitted.
The general deadline for individuals is June 30 of the following year. Year-end ownership reporting may continue during ownership even when the property generates no rental income. These information submissions are separate from income tax returns.
Before purchasing, renting out, or selling a U.S. home, review the obligations in both countries and retain purchase documents, rental records, expense receipts, and tax statements.