Averaging Four Weeks Decides Whether Korea's Fifteen-Hour Line Cuts Your Paid Weekly Holiday

The Scene

A postgraduate student takes a weekend shift at a bakery in Mapo. The written contract sets the schedule at 14 hours a week, seven on Saturday and seven on Sunday. Trade is heavy that month, so the shifts run long: the payslip shows 18 hours in the first week, 18 in the second, 16 in the third and 16 in the fourth. When the month closes, the pay covers the hours worked and nothing else. There is no line for a paid weekly holiday.

She looks the rule up and finds the number that every explainer repeats: 15 hours a week. Measured against the payslip she cleared that line in each of the four weeks, with an average of 17. So the missing holiday pay looks like a shortfall, and she says so. The owner answers with a different number, the 14 in the contract, and refuses. Neither of them is misquoting the statute. They are reading the same sentence and measuring two different things.

The sentence is "제18조제3항", Article 18(3) of the Labor Standards Act. The argument is not about whether 15 is the threshold, because it is. The argument is about which hours get averaged and over what window, and the statute answers that question in a way most summaries skip. Once the right hours go into the average, a second question opens that is skipped even more often: crossing the line does not buy the same thing in every workplace. In a shop with four or fewer employees it buys noticeably less, and the reason sits in a table in the Presidential Decree rather than in the Act.

What the Rule Actually Says

Article 18 has three paragraphs, and each one carries weight. Paragraph 1 is the proportionality rule: "단시간근로자의 근로조건은 그 사업장의 같은 종류의 업무에 종사하는 통상 근로자의 근로시간을 기준으로 산정한 비율에 따라 결정되어야 한다", meaning the working conditions of a part-time worker are to be set by a ratio calculated against the working hours of a comparable full-time worker at the same workplace. The Korea Legislation Research Institute, English translation of the Labor Standards Act renders it as "The terms and conditions of employment of part-time employees shall be determined on the basis of relative ratio computed in comparison to those work hours of full-time employees engaged in the same kind of work at the pertinent workplace."

Paragraph 2 delegates the mechanics: "제1항에 따라 근로조건을 결정할 때에 기준이 되는 사항이나 그 밖에 필요한 사항은 대통령령으로 정한다", which hands the standards for applying paragraph 1 to the Presidential Decree. That is where the arithmetic lives.

Paragraph 3 is the one in dispute. In the text published by the Korea Ministry of Government Legislation, Labor Standards Act Article 18 it reads "4주 동안(4주 미만으로 근로하는 경우에는 그 기간)을 평균하여 1주 동안의 소정근로시간이 15시간 미만인 근로자에 대하여는 제55조와 제60조를 적용하지 아니한다": averaged over four weeks, or over the actual period where the work runs for less than four weeks, a worker whose weekly contracted hours come to under 15 is outside Articles 55 and 60. The paragraph ends there. There is no proviso after it, no "다만" clause, and no fourth paragraph in the article.

Two words in that sentence settle the bakery argument. The first is "소정근로시간", the hours the parties agreed to as the schedule, not the hours a payslip later records. Overtime is paid as overtime precisely because it sits outside the agreed schedule, which is the figure the statute reads. The second is "4주 동안", four weeks, which makes the unit of measurement a block rather than a calendar week. A single busy week does not lift a worker over the line, and a single quiet week does not push a worker under it.

The parenthetical is the part routinely dropped in translation. "4주 미만으로 근로하는 경우에는 그 기간" means that where the engagement itself is shorter than four weeks, the averaging window shrinks to that engagement. A three-week festival job is averaged over three weeks, not padded out with a fourth empty week that would drag the average down. This cuts in the worker's favour and is routinely missed.

What the line switches off is also specific. Article 55 is the weekly paid holiday: "사용자는 근로자에게 1주에 평균 1회 이상의 유급휴일을 보장하여야 한다", an employer shall secure at least one paid holiday per week on average, a wording settled by the amendment of 20 March 2018. Its second paragraph adds the holidays that the Presidential Decree designates, "사용자는 근로자에게 대통령령으로 정하는 휴일을 유급으로 보장하여야 한다", subject to the proviso "다만, 근로자대표와 서면으로 합의한 경우 특정한 근로일로 대체할 수 있다", which lets a written agreement with the workers' representative substitute a specified working day. Article 60 is annual leave: "사용자는 1년간 80퍼센트 이상 출근한 근로자에게 15일의 유급휴가를 주어야 한다", 15 days of paid leave for a worker with at least 80 percent attendance over a year. Its second paragraph covers two separate groups, a worker with less than one year of continuous service and a worker below 80 percent attendance, giving each one day per month of full attendance. The entry rules for that article are set out in the entry conditions attached to Korea's annual leave.

The Numbers

Clearing the line is worth something only because the Decree says how to price it. The delegation in paragraph 2 lands in Korea Ministry of Government Legislation, Enforcement Decree of the Labor Standards Act Table 2, the schedule of standards for setting part-time working conditions, last amended on 14 October 2021. Its wage item fixes the unit as an hourly rate, and then defines the working day that a part-timer does not otherwise have: "단시간근로자의 1일 소정근로시간 수는 4주 동안의 소정근로시간을 그 기간의 통상 근로자의 총 소정근로일 수로 나눈 시간 수", the number of contracted hours in a part-timer's day equals the contracted hours across four weeks divided by the number of scheduled working days a comparable full-time worker has in that same period.

Note what is being divided. The same four-week block that the Act uses as a gate is reused here as a meter. On the gate it is divided by four to produce a weekly average and compared with 15. On the meter it is divided by the full-timer's scheduled workdays to produce the length of one paid day.

Take the bakery contract rewritten at 16 hours a week instead of 14. Across four weeks that is 64 contracted hours. If the comparable full-time staff work a five-day week, they have 20 scheduled working days in those four weeks. Dividing gives 3.2 hours. That 3.2 is the worker's statutory day, and Table 2 then states plainly that "사용자는 단시간근로자에게 법 제55조에 따른 유급휴일을 주어야 한다", the employer shall grant the part-time worker the paid holiday under Article 55. One paid holiday a week at 3.2 hours is roughly 13.9 paid hours a month that appear nowhere on a timesheet, which for a household budget is close to a fifth of the hours actually worked.

At the original 14 hours a week the same arithmetic produces nothing at all, because the gate closes first. Four weeks at 14 is 56 contracted hours, an average of 14, under 15, and Article 18(3) removes Article 55 before Table 2 ever gets to divide. The difference between the two contracts is two hours a week of schedule, and it is worth a weekly paid day plus annual leave.

The short engagement is where the parenthetical pays. A three-week job at 16 hours a week is 48 contracted hours over three weeks. Averaged over the actual period the figure stays at 16 and clears the line. Averaged over a notional four weeks it would fall to 12 and fail. The statute's own words choose the first calculation.

Table 2 handles annual leave by ratio rather than by a flat 15 days: "통상 근로자의 연차휴가일수 × 단시간근로자의 소정근로시간 × 8시간 / 통상 근로자의 소정근로시간", the full-timer's annual leave days multiplied by the part-timer's contracted hours and by eight hours, then divided by the full-timer's contracted hours. The result is an entitlement counted in hours, not in days. On a 16-hour schedule against a 40-hour comparator, 15 days becomes 48 hours, which is six eight-hour days.

Where This Doesn't Apply

The first limit is that the Act may not reach the workplace at all. Article 11(1) sets the scope: "이 법은 상시 5명 이상의 근로자를 사용하는 모든 사업 또는 사업장에 적용한다", the Act applies to every business or workplace that regularly employs five or more workers, followed immediately by the proviso "다만, 동거하는 친족만을 사용하는 사업 또는 사업장과 가사(家事) 사용인에 대하여는 적용하지 아니한다", which excludes a business staffed only by cohabiting relatives and excludes domestic workers. Paragraph 2 then provides that for a workplace regularly employing four or fewer workers, some provisions of the Act apply as prescribed by Presidential Decree, and paragraph 3, added on 21 March 2008, sends the headcount method to the Decree as well.

That Decree list is Korea Ministry of Government Legislation, Enforcement Decree of the Labor Standards Act Table 1, and its two column headings are worth reading before any value is taken from it. The left column is the classification and the right column is headed as the applicable provisions. It is a list of what does apply, not a list of exclusions. Running down that right column, the entry for working hours and rest reads "제54조, 제55조제1항, 제63조", that is Article 54, Article 55(1) and Article 63. Article 18 is listed elsewhere in the same column. Article 60 is not. Article 55(2) is not.

That changes the value of the fifteen-hour line by headcount, and it is the branch most summaries lose. At a workplace with five or more employees, a part-timer above the line holds Article 55(1), Article 55(2) and Article 60, and falling below the line takes away two of those entitlements at once. At a workplace with four or fewer, Article 60 is not switched on and Article 55(2) is not switched on, so the only thing the line controls is Article 55(1). Crossing it there wins one weekly paid holiday and nothing more. Falling below it leaves nothing, because Korea Ministry of Government Legislation, Labor Standards Act Article 55 paragraph 1 was the only part of either article that Table 1 had left standing.

Headcount is itself contestable. In an interpretation issued as Labor Standards Policy Division 1937 on 16 June 2023, published by the Ministry of Employment and Labor, interpretation on annual leave at workplaces with four or fewer employees, the ministry stated that where a family member has concluded an employment contract and provides work for wages under the employer's direction and supervision, that person is a worker under the Act and is counted in the regular headcount. The same answer added that where the parties have agreed to apply a provision, the employer must follow that agreement, the statutory conditions being a floor. A small shop that wrote annual leave into its contracts does not get Table 1 as a shield.

The line also does not travel outside this Act. Article 18(3) names Article 55 and Article 60 and stops, so nothing in it reaches any other statute; what other statutes do with a fifteen-hour figure was not checked here and is not claimed either way. The comparison with how severance pay and dismissal notice pay are calculated separately is a reminder that thresholds are read one statute at a time. The Korea Ministry of Government Legislation, Easy Law guide to the special application of the Labor Standards Act to part-time workers summarises the paragraph as removing paid holidays and annual leave, and does not reprint the article or name Article 55 by number, which is one reason the headcount branch is easy to miss.

If You Are Actually in This Situation

Start with the contract, not the payslip. The figure that decides the question is the weekly schedule the parties agreed, so the first thing to read is the written contract and the shift roster it refers to. If the contract sets 14 hours and the roster sets 14, the payslip showing 18 does not change the gate; it changes only how much is owed for the hours actually worked.

Then set the window. Count four consecutive weeks of contracted hours, divide by 4, and compare the result with 15. If the engagement itself runs for less than four weeks, count only the weeks the engagement covers, because Article 18(3) says to use that period. Do not average a three-week job across four weeks.

Next, count the workplace. Five or more regularly employed workers means Article 55 and Article 60 are both in play. Four or fewer means Table 1 has already removed Article 60 and Article 55(2), so the line is worth the weekly paid holiday alone. Family members working under an employment contract for wages count in that headcount, on the ministry's own interpretation.

If the gate is open, price the day with Table 2 rather than guessing. Contracted hours across the four weeks, divided by the comparable full-timer's scheduled working days in the same four weeks, gives the paid day. On 64 hours against 20 full-time days that is 3.2 hours, and the employer owes one such day per week in addition to hours worked.

A contract sitting one or two hours under the line is the case worth renegotiating: moving a 14-hour schedule to 16 adds two scheduled hours and returns a weekly paid day plus pro-rated annual leave. Where a small workplace has already written in those entitlements, the 2023 interpretation treats the agreement as binding, so the practice is worth documenting before it is withdrawn. For a threshold drawn on clock time instead of an average, compare the limits on teaching hours at Korean institutes.

What Would Invalidate This

Two gaps are worth naming. The Ministry of Employment and Labor's online counselling pages on weekly holiday pay are disallowed by the ministry site's own crawling rules and were not read, so nothing above rests on them. The severance statute was not fetched here, so nothing above describes what it requires or what any threshold in it measures; the claim above is only that Article 18(3) names Articles 55 and 60 and no others.

The gap most likely to move a real dispute is this: a schedule that is contradicted week after week by much longer actual hours can be argued to have been varied in practice, which would raise the contracted figure rather than the worked figure. That argument turns on administrative interpretations and court decisions that were not fetched for this piece, so no outcome is asserted for it. If a tribunal accepted it on the bakery facts, the gate would open on a reading of the contract, not on a reading of the payslip, and the sentence quoted above would still be the one doing the work.

One caution on sources: the published English translation of Article 18 retrieved here reproduces paragraph 1 only, and an older bilingual view of the same article carries superseded wording. The Korean text published by the National Law Information Center, amended on 21 March 2008, is the operative one.