Korea D-4 Visa and the Immigration Office: A Step-by-Step…

Korea’s D-4 visa lets foreigners study the Korean language full-time at an accredited institute. But the visa is only half the story. Almost every D-4 holder must deal with a regional immigration office, usually within weeks of landing. This guide walks you through what the Korea Immigration Service expects, which documents to bring, and how the office handles your registration, part-time work, and later visa changes.

We cover only sourced, official rules here. Immigration officers have discretion, so treat this as a preparation checklist, not a guarantee. Always confirm current details on HiKorea, the official portal of the Korea Immigration Service.

What is the D-4 visa and why does the immigration office matter?

The D-4 is the general training visa, most often used for language training visa eligibility at university-run Korean language institutes. After you enter Korea, the regional immigration office registers your stay, issues your Alien Registration Card, and approves changes like part-time work or a switch to a study visa. Without the office, your legal status stays incomplete.

The D-4 visa in plain terms

The D-4 (General Training) status is issued by the Ministry of Justice through Korean embassies abroad, then managed inside Korea by the Korea Immigration Service. The most common subtype is D-4-1, for students at a 어학당 (eohakdang, university language institute). Other D-4 subtypes cover trainees at research centers or companies, but language students are the largest group.

The visa in your passport gets you into the country. The immigration office is where your residency becomes official. Think of the embassy as the door and the immigration office as the front desk that checks you in.

Korea student visa types comparison

Who is eligible for a D-4 language training visa?

To qualify, you must enroll full-time in a Korean language program at an institute recognized by the Ministry of Justice, attend at least the required weekly hours, and show enough funds for tuition and living costs. Language school enrollment requirements usually include an admission letter, proof of the last education level, and a bank balance certificate. High school graduation is the typical minimum.

Core eligibility conditions

The Korea Immigration Service publishes the baseline conditions for D-4-1 applicants. While exact figures change, the structure is stable:

According to the Korea Immigration Service, D-4 holders must maintain enrollment and attendance to keep their status valid; dropping below the required attendance rate can lead to status problems.

Attendance is taken seriously. Many institutes report attendance directly, and a low rate can block your visa extension. Confirm the current funding figure and attendance threshold for your office on HiKorea or with the Korea Immigration Service before you apply.

Which documents do you need at the immigration office?

For the D-4 required documents, bring your passport, a completed application form, a passport photo, your certificate of admission and business registration of the school, proof of paid tuition, a bank balance certificate, and proof of address in Korea. You also pay a fee for the Alien Registration Card. Missing any item usually means a second visit.

The standard D-4 document checklist

When you register or extend at the office, prepare the following. Requirements vary slightly by office, so check your local branch through HiKorea.

1. Passport and a copy of the photo page and your D-4 entry stamp.
2. Application form (integrated application for foreigners), available at the office and on HiKorea.
3. One color photo (3.5 cm x 4.5 cm), taken within the last six months.
4. Certificate of admission plus the institute’s business registration certificate.
5. Tuition payment receipt for the current term.
6. Bank balance certificate proving you can cover study and living costs.
7. Proof of residence, such as a dormitory confirmation or a lease (jeonse or monthly rent).
8. Fee payment for the Alien Registration Card, paid in person.

Keep digital and paper copies of everything. The office may ask for originals on the spot.

Korea ARC application guide

Booking and visiting the office

Most regional offices now require an online reservation. To book, log in to HiKorea, choose your office and a date, and bring the confirmation. Walk-in service is limited and often unavailable at busy branches in Seoul. The fee schedule and reservation system are run by the Ministry of Justice and the Korea Immigration Service.

What are the D-4 part-time work rules?

Under the D-4 part-time work rules, you cannot work freely. You must get prior permission from the immigration office, usually after about six months of study and with adequate Korean ability. Once approved, term-time work is typically capped at around 20 hours per week, with more allowed during official vacations. Working without permission risks fines and status loss.

How part-time permission works

The Korea Immigration Service treats D-4 study as the main purpose, so work is a supplementary activity that needs approval. The general framework looks like this:

• You apply for part-time work permission (S-3) at the immigration office or through HiKorea.
• Approval often requires a minimum study period (commonly six months) and a Korean language level, frequently TOPIK level 2 or higher.
• Allowed weekly hours are limited during terms and expanded during vacations.
• Some job types, such as adult entertainment or manufacturing line work, are restricted.

Because caps and language thresholds change, verify the latest limits on HiKorea and ask your office directly. Never assume the rules from a friend’s experience two years ago still apply.

part-time work permission for students Korea

How do you change from a D-4 to a D-2 visa?

The D-4 to D-2 visa change happens at the immigration office once you gain admission to a degree program. D-2 covers university study (associate, bachelor, master, or doctoral). You apply for a change of status, not a new entry visa, by submitting your university admission letter, transcripts, financial proof, and your current ARC. Approval lets you stay without leaving Korea.

Steps for the D-4 to D-2 change

Many language students move to a D-2 visa after finishing their program. The change of status is processed in Korea, so you do not need to fly home.

1. Secure university admission and request a certificate of admission (also called a standard admission letter).
2. Book a change-of-status appointment on HiKorea.
3. Prepare documents: admission certificate, latest transcript, bank balance certificate, your passport, and your current Alien Registration Card.
4. Submit and pay the change-of-status fee at the office, run under Ministry of Justice rules.
5. Wait for the result, then collect your updated status and, if needed, a reissued ARC.

The core difference is purpose: D-4 is language training, D-2 is formal degree study. The Korea Immigration Service expects a clean attendance record on your D-4 before approving the move. For statute-level detail in English, you can also check MOLEG, which publishes Korean immigration laws.

A note on the integration program

If you plan to stay long term, the Korea Immigration and Integration Program (KIIP) can help with future residency points. Details are on KIIP. It is separate from your D-4 study but useful to know early.

Frequently asked questions

The sections above cover the main process. These FAQs answer the questions D-4 applicants ask most at the immigration office.