D-2 vs D-4 Korean Study Visa 2026: The Legal Difference

Ask five people which Korean study visa you need and you will get five answers. Some say D-4 is "the language visa" and D-2 is "the university visa," which is close but not quite it. Others say D-4 only lasts six months. That one is simply wrong.

So rather than repeat what the forums say, here is what the law says. Both visas are defined in the same place: Appendix 1-2 of the Enforcement Decree of the Immigration Act, the list of long-term statuses of stay. The definitions are short, and once you read them the difference stops being confusing.

D-2 versus D-4 Korean study visa comparison cover

What the decree actually says

Study (D-2) is for "a person who intends to receive education in a regular course at an educational institution of junior college level or above, or at an academic research institution, or to conduct specified research."

General Training (D-4) is for "a person who intends to receive education or training, or engage in research activity, at an educational institution, company, organization or similar that meets the requirements set by the Minister of Justice."

Read them side by side and the line is clear. D-2 is tied to a regular course at a junior college or above. D-4 covers training that sits outside that: university language institutes, and other approved programs.

Table comparing D-2 and D-4 visas by institution, activity, maximum stay and exclusion rule

The clause most guides skip

The D-4 definition does not end there. It carries an exclusion in brackets, and it matters:

excluding a person who receives remuneration exceeding living expenses from the training institution, or who falls under the Study (D-2) or Industrial Training (D-3) status

In plain terms: if your program qualifies you for D-2, you do not get to pick D-4 instead. The status is decided by what you are actually enrolled in, not by which application looks easier. This is why people who try to enter a degree program on a D-4 run into trouble at the immigration office.

The second half of that clause is about money. If the institution pays you more than living expenses, you are being employed, not trained, and D-4 is no longer the right status.

How long each one lasts

Here is where the "D-4 is only six months" myth falls apart. Appendix 1 of the Enforcement Rule sets the maximum period of stay that can be granted at one time for each status. For D-2 it is two years. For D-4 it is also two years. They are identical.

What you should not read into that: the maximum is a ceiling, not a promise. The immigration office decides the actual period based on your program length, your school, and your circumstances. A one-year language course will not get you two years because the law allows it. But the ceiling being the same for both means the visa type is not what limits you.

So which one applies to you

Bachelor's, master's or doctoral degree at a Korean university — that is a regular course at an institution above junior college level. D-2.
Associate degree at a junior college — still D-2. The decree says junior college or above.
Korean language program at a university-affiliated institute — not a regular degree course. D-4.
Research at an academic research institution — read the D-2 definition again: it covers specified research. Which one applies depends on the institution and the arrangement, so this is the case worth asking about directly rather than guessing.

The practical test is simple. Are you enrolled in a degree program at a junior college or above? If yes, D-2. If your program is training or language study outside that, D-4.

Three step diagram of the 90 day alien registration rule in Korea

After you arrive: the 90-day rule

Whichever status you hold, Article 31 of the Immigration Act applies the moment you land. If you intend to stay in Korea for more than 90 days from the date of entry, you must register as an alien with the immigration office for your address within 90 days of entry.

Diplomats, international organization staff and a few government-invited categories are exempt. Students are not on that list. Since almost every D-2 and D-4 holder is staying longer than 90 days, treat registration as a fixed part of arriving, not an optional errand. We have written separately about booking the appointment through HiKorea and what to do when there is no slot left, which is the part that actually catches people out.

What this post deliberately does not tell you

Three things you will see confidently stated elsewhere are not in the decree, and we are not going to invent them:

Part-time work hours. Permission to work part-time on a student visa, and the hours allowed, come from Ministry of Justice guidelines rather than the Act itself. They are revised, and the numbers differ by status, level and Korean ability. Confirm the current figures with immigration before you rely on them.
Sub-categories. D-2 is administered in sub-classes and D-4 likewise. These come from ministry practice, not the decree text.
Required documents. These vary by embassy and consulate. Your school's international office and the Korean mission in your country are the sources that count.

What the decree gives you is the part that does not change month to month: which status your program belongs to, and why.