Ninety Days From Entry, or From the Grant: Korea's Alien Registration Uses Both

A foreigner lands at Incheon in early March on a short-term entry, finds work, and walks out of an immigration office on the first of May holding a freshly stamped change of status. The clerk says the alien registration is due. Due when? One adviser counts ninety days from the first of May. A second counts ninety days from the March arrival and concludes that the deadline has nearly run out. A third says the filing was already due at the moment the stamp came down.

None of the three is inventing a rule. Each has picked a different paragraph of the same article. Korea's Immigration Act prints the number ninety in each of them, but two count from entry and the third from the grant, and in two of them it does not give you ninety days at all.

The Scene

Take the dates as fixed. Entry on the second of March. A change of status under "제24조", Article 24, granted on the first of May. Departure booked for the twentieth of June.

Counted from entry, that stay runs 111 days. Counted from the permission, it runs 51 days. Both figures shift by one day depending on whether the first day is counted, and for this case that does not matter: 111 clears ninety on either convention and 51 falls short of it on either convention. So the whole answer turns on which of the two dates the statute told you to start from.

Pick the wrong paragraph and the two readings do not merely give different deadlines. They give opposite answers about whether there is a deadline at all. Fifty-one days is not more than ninety days, so a reader who starts the clock at the permission concludes that no registration is required at all. A reader who starts the clock at entry gets 111 days, concludes that registration is required, and then has to find out when it was due.

The second reader is right, and the paragraph that makes him right is the one it is easiest to stop reading before the end.

What the Rule Actually Says

The operative provision is "제31조", Article 31, of the Immigration Act. The text used here is the official English consolidation published by the Korea Legislation Research Institute, Statutes of the Republic of Korea: Immigration Act, whose header lists Act No. 19070 of 13 December 2022 as the most recent amendment, with Article 31 itself wholly amended on 14 May 2010 and amended again on 18 March 2014 and 29 March 2016.

The main clause, "제31조제1항", Article 31(1), reads: "If an alien intends to stay in the Republic of Korea for more than 90 days from the date of entry, the alien shall file for alien registration with the head of the Regional Immigration Service having jurisdiction over his or her place of stay within 90 days from the date of entry into the Republic of Korea, as prescribed by Presidential Decree: Provided, That this shall not apply to any of the following aliens:"

Read the two halves separately, because they are two different uses of the same number. The first ninety is a test applied to an intention: more than ninety days of intended stay, counted from entry. The second ninety is a deadline: within ninety days, counted from entry. The test decides whether you owe a filing. The deadline decides when. They share a start date and a figure, and they are not the same sentence clause.

The consequence of that pairing is worth stating plainly. If the duty attaches at all, it attaches to a stay that will run past day ninety, and the paperwork falls due on or before day ninety. The filing therefore falls due before the day that proves the duty was owed. The main clause itself gives no leave to wait and see how long you actually stayed, and the Presidential Decree it refers to was not retrieved.

Then come the exceptions, three of them, listed as items under the proviso: personnel of foreign diplomatic missions, including embassies and consulates, and of international organizations in Korea, together with their families; aliens who enjoy privileges and immunity similar to those of diplomats or consuls under an agreement with the Korean government, together with their families; and "Persons, etc. invited by the Government of the Republic of Korea and prescribed by Ordinance of the Ministry of Justice."

Being inside the proviso is a release, not a bar. "제31조제2항", Article 31(2), adds: "Notwithstanding paragraph (1), an alien referred to in any subparagraph of paragraph (1) may file for alien registration during his or her period of stay." The three exempt categories may register voluntarily, and the window for doing so is the period of stay rather than ninety days.

Now the two paragraphs that move the start date. "제31조제3항", Article 31(3): "Notwithstanding the main clause of paragraph (1), a person who is granted the status of stay under Article 23 and intends to stay for more than 90 days from the date on which he or she is granted the status of stay shall file for alien registration when he or she is granted the status of stay."

And "제31조제4항", Article 31(4): "Notwithstanding the main clause, with the exception of the subparagraphs, of paragraph (1), a person who obtains permission to change his or her status of stay under Article 24 and continues to stay for more than 90 days from his or her entry shall file for alien registration when he or she obtains permission to change his or her status of stay."

Those two paragraphs differ from each other in exactly the place that matters. Paragraph (3) measures its ninety days from the date the status is granted. Paragraph (4) measures its ninety days from entry. Both then abandon the ninety-day window: each says the filing is due when the status is granted or the permission obtained, not within some period afterwards.

A fifth paragraph, Article 31(5), assigns the alien registration number itself and covers filings made under paragraphs (1) through (4), which is the drafter's own confirmation that there are four routes into registration, counting the voluntary one in paragraph (2), rather than one with footnotes.

The Numbers

Lay the four routes side by side and the arithmetic separates cleanly.

Under Article 31(1) the clock starts at entry and the filing window is ninety days wide. A person who enters on the second of March and intends to stay into June owes a filing, and the window closes around the end of May. Nothing about the intended departure date extends it.

Under Article 31(3) the clock starts on the date the status of stay is granted. The route into that paragraph is "제23조", Article 23, which covers people already in Korea without a status of stay. Its first item is a child: "An alien born in the Republic of Korea: 90 days from the date of his or her birth;". So a baby born in Seoul to foreign parents has a ninety-day clock of its own, running from birth, to be given a status at all. If the status then granted carries an intended stay of more than ninety days measured from that grant, the registration is due at the grant. Two ninety-day clocks in sequence, neither counted from an entry the child never made.

Article 23's second item is the counter-case that fixes the pattern: an alien with "any other reason, such as" loss or renunciation of Korean nationality while in Korea has sixty days, not ninety, from the date the reason occurs. The item is residual, not a list of two. The Act is not built on a single number.

Under Article 31(4) the clock starts at entry, and this is the paragraph that decides the case in The Scene. Entry on the second of March, departure on the twentieth of June, so the stay continues for 111 days from entry. That is more than ninety. The permission came on the first of May, and paragraph (4) makes the filing due when the permission is obtained, so the registration was due on the first of May and not ninety days later. The adviser who counted 51 days from the permission and found them short of ninety was counting in the wrong paragraph.

One more figure belongs on the same page. "제24조제2항", Article 24(2), gives a different period to a narrow group: "A person who falls under any subparagraph of Article 31 (1) and intends to change his or her status of stay due to a change of his or her status shall obtain permission to change his or her original status of stay from the Minister of Justice within 30 days of the change of his or her status." Thirty days, for a person inside one of the three exempt categories whose own status changes. Chapter V, where Article 31 sits, carries a fifteen-day report under Article 36(1) when a registered alien moves house, which is a separate duty on a separate clock and the subject of an earlier footnote on the fifteen-day moving-in report.

Where This Doesn't Apply

The proviso's three categories are the exits the Act writes for itself, and two of them are defined by diplomatic or treaty standing rather than by length of stay. The third is defined by delegation: persons invited by the Korean government "and prescribed by Ordinance of the Ministry of Justice." That Ordinance was not opened, so the third category's reach is left open here.

Permanent residents are commonly assumed to sit outside the whole arithmetic, and the Act does not say that. "제10조의3제1항", Article 10-3(1), provides: "Limitations on the extent of activities and the period of stay shall not apply to an alien granted the status of permanent residency under subparagraph 2 of Article 10". That lifts the ceiling on a stay rather than removing the stay from Article 31(1), whose only exits are the three categories in the proviso, and permanent residency is not among them.

There is also a trap on the other side, and it is the reason the number ninety cannot be treated as a single line across the Act. "제10조의2제1항", Article 10-2(1), classifies standard status of stay, and its first item defines short-term stay as "a status of stay by which it is permitted to stay in the Republic of Korea for not more than 90 days (where a period of stay exceeds 90 days pursuant to a visa exemption agreement or the reciprocity, such period of stay) for the purpose of tourism, visit, etc.;". The parenthetical is the whole point. For a national whose visa exemption agreement or whose reciprocal treatment runs longer than ninety days, short-term status itself runs longer than ninety days.

So the ninety in Article 10-2 stretches by treaty, and the ninety in Article 31(1) is not written to stretch with it. A visitor holding short-term status for a treaty period longer than ninety days, who intends to use it, is on the face of Article 31(1) a person intending to stay more than ninety days from entry, and short-term status is not one of the three categories in the proviso. Whether the Presidential Decree that Article 31(1) refers to, or the Ministry of Justice Ordinance behind the third category, reaches that visitor is a question this piece did not resolve, because neither instrument was retrieved. The conclusion stops at the Act.

Finally, the long-term side of the same provision reads from the other direction. Item 2 of Article 10-2(1) describes long-term stay as permitted "within a maximum period exceeding 90 days prescribed by Ordinance of the Ministry of Justice" for study, training, investment, business presence, marriage and the like. Ninety days is the floor of the long-term world and, treaty cases aside, the ceiling of the short-term one, which is why a stay that crosses it changes category and not merely duration.

If You Are Actually in This Situation

Start by naming the paragraph, not the number. Three questions settle it. Did you enter Korea on a status of stay, or were you given one while already here under Article 23? Has a change of status under Article 24 been granted since you entered? And is your intended stay, measured from whichever of those dates your paragraph names, longer than ninety days?

If you entered on a long-term status and nothing has changed since, you are in Article 31(1): count from the date of entry and file within ninety days of it. If a change of status was granted after you entered, you are in Article 31(4): the test is still measured from entry, but the filing is due at the permission, which in practice means the same visit to the office. If you or your child received a status of stay under Article 23 rather than on entry, you are in Article 31(3): the test runs from the grant, and the filing is due at the grant.

Where the dates are tight, the cheap move is to treat the earliest of the candidate due dates as the real one. Paragraph (3) and paragraph (4) both fall due at a counter you are already standing at, so filing then costs nothing extra and removes the question. The expensive move is the opposite: deciding from the shorter day-count that no duty exists.

For the procedure and the document list at the counter, the Korea Immigration Service, Hi Korea immigration and residence information pages are the official route. Two related counting problems have their own footnotes: how days abroad move the start date of a six-month qualifying period, and which self-employed foreign residents fall inside a given scheme. Both turn on the same habit: find the provision that names your start date before you count a single day.

What Would Invalidate This

The text read here is the Korea Legislation Research Institute's English consolidation of the Immigration Act, with the amendment dates given earlier. The Korean original at the Korea Law Information Center, Immigration Act could not be opened during this pass, so a later amendment to Article 31 would unsettle the paragraph numbering used above, and that is the first thing to check.

Three further limits. The Enforcement Decree and the Enforcement Rule of the Immigration Act were not retrieved, and Article 31(1) and Article 31(5) both delegate to Presidential Decree while the third exempt category delegates to Ministry of Justice Ordinance, so any of those instruments could narrow or widen what is described here. Whether the date of entry itself counts as the first of the ninety days was not resolved from the retrieved text, which is why the worked case was chosen so that the one-day question cannot change its outcome. And the penalty articles, which sit beyond the retrieved portion of the statute, were not read, so nothing above states what a late filing costs.