Taxes in Korea for Foreigners
Last verified: September 22, 2026 · Source-verified
Korean tax residency can change which income Korea taxes before you even begin comparing tax rates.
The familiar “183-day rule” is real, but it is only part of the test. Korean law also recognizes a resident who has a domicile in Korea, and the domicile analysis looks at objective living ties such as occupation, family and assets.
Your visa type does not settle the tax question. Start with where your life is actually based, how long you have been in Korea and when your Korean domicile or place of residence began.
Yeongdong Tax Office · Photo: Dittwjfsdgkvkdjg / Wikimedia Commons · CC BY-SA 3.0
You already have a Korean domicile based on your actual living situation:
You may be a Korean tax resident without waiting for a simple day counter to reach 183.
You do not have a Korean domicile, but your Korean place of residence reaches 183 days:
The 183-day residence route can establish resident status.
You have neither a Korean domicile nor a qualifying 183-day place of residence:
Nonresident status may apply under Korean domestic law.
Another country also treats you as its tax resident:
Check the relevant tax treaty. Dual-residence cases can require a separate treaty analysis.
1. Korea’s legal definition of resident and nonresident
Under Korea's Income Tax Act, a resident is an individual who has a domicile in Korea or a place of residence in Korea for at least 183 days.
A nonresident is an individual who does not meet the resident definition.
주소 — domicile: where the person's general living relationship is based
거소 — place of residence: a place where the person stays for a substantial period without the same full living relationship as a domicile
That distinction explains why simply counting passport-entry days can miss part of the legal test.
2. Domicile is judged from your actual living ties
The Enforcement Decree says domicile is determined from objective facts concerning a person's living relationship, including family living together in Korea and assets located in Korea.
It also provides situations in which a person living in Korea is deemed to have a Korean domicile, including:
- having an occupation that normally requires continuous residence in Korea for 183 days or more; or
- having family living together in Korea where the person's occupation and assets indicate that he or she is expected to reside in Korea for at least 183 days.
This is why “I have only been here for 120 days” cannot always answer the residency question by itself.
3. The date your resident status begins can matter
For someone moving from nonresident to resident status, Korea's Enforcement Decree identifies several possible starting points.
- the day the person establishes a Korean domicile;
- the day a circumstance arises under which the person is deemed to have a Korean domicile; or
- the day the person's period of residence reaches 183 days.
That timing can affect the tax treatment of income received around the year of arrival or departure. Save your entry and exit dates, housing records and employment dates instead of reconstructing them after a tax question appears.
4. Resident and nonresident income scopes are different
| Status | General Korean tax scope | Important limit |
|---|---|---|
| Resident | Generally income covered by the Income Tax Act, including worldwide income | Special foreign-resident rule may limit taxation of certain foreign-source income |
| Foreign resident with 5 years or less in the prior 10 years | Special treatment for foreign-source income | Foreign-source income is taxed under this rule when paid in Korea or remitted to Korea |
| Nonresident | Korean-source income specified by law | Treaty provisions may affect the result |
The words “worldwide income” therefore need context when applied to a foreign resident who falls within the short-term 5/10-year provision.
5. How the foreign-resident 5/10-year rule works
The special rule applies to a foreign resident whose total period of having a domicile or place of residence in Korea is five years or less during the ten years before the end of the relevant tax period.
For that taxpayer, foreign-source income is taxed in Korea under this special rule when the income is paid in Korea or remitted to Korea.
You still need to determine whether the income is actually foreign-source, whether it was paid or remitted into Korea, whether another Korean-source rule applies and whether a treaty changes the result.
The location of a client, bank account or payment platform can be relevant, but those facts alone do not always settle the legal source of income.
6. Your visa is evidence of immigration status, not the tax-residency answer
A D-2 student, E-7 employee, F-visa holder or permanent resident still has to apply the tax-residency rules to the actual facts.
Immigration status can help explain why you are in Korea and how long you are expected to stay, but the Income Tax Act uses its own resident and nonresident tests.
Do not copy your immigration category into a tax form as if the two systems use the same definition.
7. Keep evidence of where your life was based
When residency is not obvious, useful records can include:
- Korean entry and exit dates;
- lease, dormitory or other housing records;
- employment contract and expected work period;
- documents showing where family members live;
- records relating to assets and an established home;
- foreign residence or permanent-residence documentation where relevant;
- bank and remittance records when the 5/10-year foreign-income rule is involved.
A simple day-count spreadsheet is useful, but keep the documents that explain the day count and the living relationship behind it.
8. If two countries call you a resident, check the treaty
It is possible for domestic laws in two countries to point toward residence at the same time.
The applicable tax treaty may then contain residence tie-breaker rules. Those rules differ by treaty and can look at factors such as a permanent home and the center of personal or economic relations.
Do not choose a country by preference or by visa label. Identify the two domestic-law positions first, then read the treaty that applies to those countries.
Video: tax residency and filing in Korea
This English-language overview is useful for seeing how residency, filing and foreigner tax questions connect. For a personal residency decision, use the current statute and treaty rather than a video alone.
Official sources checked
- Income Tax Act — Article 1-2, Resident and Nonresident Definitions
- Enforcement Decree of the Income Tax Act — Domicile, Residence and Timing
- NTS Tax Law Information — Resident / Nonresident Taxable-Income Scope
- NTS English FAQ — Resident vs Nonresident for Tax Purposes
- NTS — Individual Income Tax and Benefit Guide for Foreigners 2026