In short: Korea’s Labor Standards Act sets a base work week of 40 hours, with a limit of 8 hours a day (Article 50). On top of that, the parties can agree to extend work hours by up to 12 hours a week (Article 53(1)) — the source of the commonly cited “52-hour week” (40 + 12). Extended work must be paid at least 50% above the ordinary wage; holiday work is 50% extra for the first 8 hours and 100% extra beyond that; and night work (10:00 p.m. to 6:00 a.m.) is 50% extra (Article 56). Workplaces that regularly employ fewer than 5 employees are not covered by any of these three articles.

The 40-hour base and the 12-hour extension

Article 50 of the Labor Standards Act sets the starting point:

Article 53(1) then allows the parties to agree to extend those hours: “Where an agreement is made between the parties, work hours referred to in Article 50 may be extended by up to 12 hours per week.” That 12-hour ceiling is on top of the 40-hour base, which is where the “52-hour week” figure comes from in ordinary usage — it is not a single number written into the statute, but the sum of Article 50’s 40-hour base and Article 53(1)’s 12-hour extension limit.

Article 53(2) provides a similar 12-hour weekly extension limit for work hours arranged under Korea’s flexible (Article 51, 51-2) and selective (Article 52) working-hour systems, so the same 12-hour ceiling applies whether the base schedule is the standard 40-hour week or one of those alternative arrangements — and, for the selective system, up to 12 hours a week averaged over the settlement period (Article 53(2)).

Article 53(4) and (5) allow a further extension beyond the Article 53(1)/(2) limits under special circumstances, but only with the Minister of Employment and Labor’s authorization and the employee’s consent — or, if the situation is too urgent to get authorization first, with after-the-fact approval obtained without delay. Where the Minister finds that extension inappropriate, the Minister can order the employer to give the employee recess time or leave corresponding to the extended hours (Article 53(4)–(5)).

A related, narrower special rule for small workplaces existed but is no longer in force: a temporary extra 8 hours for workplaces with fewer than 30 employees expired on December 31, 2022 (Addenda to Act No. 15513, Article 2). It should not be treated as a currently available option.

Two definitions shape how the weekly limit is counted. A “week” means seven days including holidays (Article 2(1)7), so the 40-hour base and the 12-hour extension are measured across all seven days, not only weekdays. And where hours are extended with the Minister’s authorization under Article 53(4), the employer must also take appropriate steps to protect the employee’s health, such as providing health examinations or granting rest time, as prescribed by the Minister of Employment and Labor (Article 53(7)).

The three premiums under Article 56

Article 56 sets out three separate categories of premium pay, each triggered by a different condition:

1. Extended work — at least 50% extra. “An employer shall, in addition to the ordinary wages, pay employees at least 50/100 thereof for extended work” (Article 56(1)). Extended work is defined by reference to the hours extended under Articles 53, 59, and the proviso to Article 69 — in other words, hours worked beyond the Article 50 base limits under one of those extension mechanisms.

2. Holiday work — 50% extra for the first 8 hours, 100% extra beyond that. Article 56(2) sets a two-tier premium for work performed on a holiday:

3. Night work — at least 50% extra. Article 56(3) defines night work as work performed between 10:00 p.m. and 6:00 a.m. the following day, and requires at least a 50% premium on top of the ordinary wage for those hours.

These three categories are assessed independently. Hours that qualify under more than one definition at the same time — for example, extended hours that are also worked between 10:00 p.m. and 6:00 a.m. — can draw more than one of these premiums for the same hours, because each premium in Article 56 is tied to its own condition rather than being a single combined rate.

Which workplaces are covered

Not every workplace in Korea is subject to Articles 50, 53, and 56. Schedule 1 of the Enforcement Decree of the Labor Standards Act, which sets out which provisions apply to workplaces that regularly employ fewer than 5 employees, lists only Articles 54, 55(1), and 63 among the work-hours-and-rest provisions of Chapter 4. Articles 50, 53, and 56 are not on that list. Separately, even at a workplace with 5 or more employees, Article 63 provides that the rules on work hours, breaks, and holidays in Chapters 4 and 5 do not apply to workers in agriculture or forestry; livestock, sericulture, or fisheries; surveillance or intermittent work approved by the Minister of Employment and Labor; or work designated by Presidential Decree (Labor Standards Act, Article 63).

That means workplaces that regularly employ fewer than 5 employees are not subject to the 40-hour/8-hour base limits, the 12-hour extension cap, or the extended/night/holiday pay premiums described above. Workers at those workplaces should not assume the 52-hour figure or the Article 56 premiums apply to them without checking their specific situation, since coverage depends on the employer’s regular employee count rather than the nature of the work.

Worked examples

These examples use the 2026 minimum wage of ₩10,320 per hour as the ordinary hourly wage, purely to illustrate how the premiums are calculated. An employee’s actual ordinary wage is usually higher than the minimum wage and is what the premium should actually be calculated against.

1. Extended work on a weekday. An employee whose ordinary hourly wage is ₩10,320 works 2 hours of extended work (agreed under Article 53(1)) on top of their normal 8-hour day. Those 2 hours are paid at 150% of the ordinary hourly wage: ₩10,320 × 1.5 = ₩15,480 per hour, for a total of ₩30,960 for the 2 hours — instead of the ₩20,640 those 2 hours would be worth at the ordinary rate.

2. Holiday work spanning more than 8 hours. The same employee works 10 hours on a holiday. The first 8 hours are paid at 150% of the ordinary hourly wage (₩10,320 × 1.5 = ₩15,480/hour, ₩123,840 for the 8 hours). The remaining 2 hours are paid at 200% of the ordinary hourly wage (₩10,320 × 2 = ₩20,640/hour, ₩41,280 for the 2 hours). Total for the day: ₩165,120.

3. Night work that is also extended work. The employee works 2 extended hours between 11:00 p.m. and 1:00 a.m. Those hours fall within the night-work window (10:00 p.m.–6:00 a.m.) and are also extended hours, so both the extended-work premium and the night-work premium apply: the ordinary hourly wage of ₩10,320, plus 50% for extended work, plus 50% for night work, comes to 200% of the ordinary rate — ₩20,640 per hour, or ₩41,280 for the 2 hours. On a payslip, this may not appear as a single 200% line: it can be split into extended-work pay (₩15,480 × 2 = ₩30,960, which already includes the base wage) and a separate night-work premium (₩5,160 × 2 = ₩10,320). The total is the same.

Three common misconceptions

“52 hours is a single number written into the law.” It is not. The Labor Standards Act sets a 40-hour base (Article 50(1)) and a separate 12-hour extension limit (Article 53(1)). “52 hours” is the commonly used sum of the two, useful as shorthand, but the statute itself works in terms of the 40-hour base and the 12-hour ceiling on agreed extensions, and additional extensions under Article 53(4)–(5) are handled through a Ministry authorization process rather than by simply adding more hours to the 52.

“Small businesses always get an extra 8 hours a week.” This special rule for workplaces with fewer than 30 employees did exist, but it was a temporary measure that expired on December 31, 2022 (Addenda to Act No. 15513, Article 2), and no later amendment has revived or extended it. It should not be relied on as a current option.

“The overtime rules apply to every job in Korea.” They do not apply uniformly. Under Schedule 1 of the Enforcement Decree, workplaces that regularly employ fewer than 5 employees are outside the scope of Articles 50, 53, and 56 — meaning neither the hour limits nor the extended/night/holiday premiums in this article apply to them. Whether a specific workplace is covered depends on its regular employee count, which is a separate question from how long or how late someone actually works.

The penalty for unpaid premiums, before and after October 8, 2026

Until October 7, 2026, an employer who violates Article 56 — that is, who fails to pay the required extended, night, or holiday work premium — is subject to a criminal penalty of up to 3 years’ imprisonment or a fine of up to ₩30 million under Article 109(1) of the Labor Standards Act, and prosecution cannot proceed against the clearly expressed wishes of the affected employee (Article 109(2)), except where an employer whose name has been publicly disclosed under Article 43-2 violates again during the disclosure period.

From October 8, 2026: the penalty for violating Article 56 is in Article 107 instead of Article 109, with a maximum of 5 years’ imprisonment or a fine of up to ₩50 million (Act No. 21533, Addenda Article 1). The rule barring prosecution against the victim’s clearly expressed wishes carries over unchanged as Article 107(2). A violation is judged under the law in force when it occurred (Criminal Act, Article 1(1)).

A note on translations: the official English translation of the Labor Standards Act was published on October 22, 2024, before the Korean amendments effective August 20, 2026 and October 8, 2026, so treat the English text as a guide and check the current Korean text for anything time-sensitive.