Korea Visa Extension 2026: When to Apply on HiKorea, Required Documents, and What Happens If You Apply Late

Official guidance from several university international offices says that for HiKorea e-filing of stay-period extensions, D-2 student visa holders may apply from four months before expiration, residence proof is typically a lease agreement, and a lease under someone else's name requires an additional residence-confirmation letter and a copy of that person's ID. In-person applicants must book a HiKorea visit reservation in advance — showing up without one gets you turned away. Law-firm explainers describe overstaying your registered period as an Immigration Act violation subject to an administrative fine, with escalating consequences from a departure recommendation up to a departure order or forced deportation depending on severity, and say that under Article 11, Paragraph 1, Item 6 of the Immigration Act, someone deported is generally barred from re-entry for five years from departure. The exact fine schedule for simple overstay itself could not be confirmed against the statute's original text in this check — confirm the precise amount with your local immigration office or HiKorea. This was checked on 2026-10-31 against HiKorea-linked university guidance and law-firm explainers.