Korea Naturalization & Citizenship Guide (2026)
Naturalization is the step beyond permanent residency: instead of staying as a foreigner with a residence card, you become a Korean national with a Korean passport. It is a serious, often years-long process that usually asks for long lawful residence, Korean language and civics knowledge, a clean record, financial stability, and — for most adults — giving up your original citizenship. This page explains the building blocks honestly and points you to the official sources that decide each case.
Who naturalization is for
Naturalization is for foreigners who have built a long-term life in Korea and want to become Korean nationals, not just long-term residents. There are several routes: general naturalization (long residence), simplified naturalization (for example, spouses of Korean nationals or people of Korean parentage), and special naturalization (for those who have made special contributions). Each route has its own residence rule and conditions. The list below covers the building blocks most applicants must meet — treat it as orientation, not a guaranteed checklist.
1. Required years of lawful residence
2. Adult age & legal capacity
3. Good conduct & clean record
4. Ability to support yourself
5. Basic knowledge of Korea (language & civics)
6. Renouncing your original citizenship
The test, the interview, and the KIIP shortcut
Most applicants must demonstrate Korean language and knowledge of Korean society. There are two common ways this happens:
| Path | How it works |
|---|---|
| Naturalization test + interview | A written test on Korean history, society, and customs, followed by an interview assessing language and attitude. |
| KIIP completion | Completing the Korea Immigration and Integration Program (commonly through Level 5) can exempt many applicants from the standard written test and language interview. |
The exact pass standards, exemptions, and whether KIIP fully replaces the interview are set officially and can change. Confirm the current rules on HiKorea or by calling 1345 — do not assume.
The citizenship-renunciation issue (read this carefully)
This is the part that surprises many people. Korea does not broadly allow naturalized adults to keep their original passport. For general naturalization, you are usually required to renounce your prior nationality (or take a legal oath limiting use of your foreign citizenship in Korea). There are limited exceptions, but dual citizenship is not the default. If keeping your home-country passport matters to you, weigh this before starting — and confirm your exact situation with an immigration professional.
F-5 first, then citizenship?
Many people secure F-5 permanent residency first, then decide later whether to naturalize. F-5 lets you live and work in Korea long term while keeping your nationality; naturalization changes your nationality. They are different decisions — see our F-5 guide and, if you are married to a Korean national, the F-6 to F-5 path.
Frequently asked questions
How many years must I live in Korea to naturalize?
General naturalization usually needs 5+ years of continuous lawful residence; the spouse-of-a-Korean route is shorter (commonly about 2 years after marriage). Verify your category on HiKorea.
Do I have to give up my original citizenship?
For general naturalization, most adults must renounce their original nationality (or take a legal oath limiting foreign citizenship). Dual citizenship is only allowed in limited cases — confirm officially.
Is there a test?
Yes for most applicants — a written naturalization test plus interview, unless you are exempted by completing KIIP (commonly Level 5). Confirm current rules.
How is citizenship different from F-5?
F-5 is permanent residency where you stay a foreigner with your own passport. Naturalization makes you a Korean national, usually requiring you to give up your prior citizenship.
How long does it take?
Reviews are commonly reported to take roughly one to one and a half years, and timelines change. Treat any figure as an estimate and confirm current processing times.