Contractual Working Hours: Korea's Work Schedule Baseline

Picture the class schedule pinned to the back of a homeroom wall. Lessons are fixed in advance—six periods on Monday, five on Wednesday. Staying after school for classroom cleaning or after-school tutoring takes place outside these scheduled blocks.

Workplaces have a timetable just like this. An employment contract spells out agreed working hours in advance, such as "Monday through Friday, eight hours a day." These pre-agreed scheduled slots are your contractual working hours.

Just as a school timetable includes blocks that are not class time, workdays include lunch and rest breaks. Because you are completely free to use this break time as your own, it is excluded from contractual hours and is unpaid.

That is why the baseline is not "how many hours you spent at the workplace," but "how many hours you agreed to work." If you arrive at 9:00 AM and leave at 6:00 PM with a one-hour lunch break, your contractual working time is eight hours, not nine.

Only after counting the scheduled periods on a timetable can you determine how many class hours occur in a month. Payroll works the exact same way. In South Korea, a standard monthly salary is built on these agreed hours plus mandatory paid weekly rest hours (*juhyu sigan*).

This calculation also works in reverse. When converting a fixed monthly salary into an hourly wage—or checking whether pay satisfies the legal minimum wage—the salary is divided by monthly paid hours (contractual hours plus weekly rest hours). For a standard 40-hour workweek, this formula yields roughly 209 paid hours per month.

The math changes once you step outside your scheduled blocks. Extra hours require additional pay. In workplaces with five or more employees, an overtime premium of at least 50% extra applies to work exceeding the statutory limits of 8 hours a day or 40 hours a week. While businesses with fewer than five workers do not owe this 50% premium, part-time workers at workplaces with five or more staff receive the overtime premium the moment they work beyond their contractual hours—even if total hours remain under 40. Ultimately, whether work falls inside or outside the agreed block determines how your pay is calculated.

Furthermore, if your agreed schedule is at least 15 hours a week and you maintain perfect attendance that week, Korean labor law grants you one paid day off (*juhyuil*), compensated as weekly holiday pay (*juhyu sudang*). If this contractual slot is written vaguely in your contract, every downstream calculation quickly falls apart.

There is one more rule to the timetable. Just as a school term caps the maximum number of classes you can take, the law places a strict ceiling on how many hours an employer and worker can schedule. In Korea, this statutory ceiling is 8 hours per day and 40 hours per week (for minors under 18, the ceiling drops to 7 hours per day and 35 hours per week).

This statutory limit and contractual working hours are not the same thing. The statutory limit defines the maximum ceiling you are allowed to schedule, whereas contractual working hours are the actual hours filled into your contract beneath that ceiling.

If you agree to work 4 hours a day, 5 days a week, your contractual schedule is 20 hours. You and your employer are free to agree on fewer hours than the legal ceiling, but you cannot contractually schedule more. Any work beyond this cap must be treated as agreed overtime, which is generally capped at 12 hours per week for adults.

Finally, remember that contractual hours represent an agreement, which may differ from the actual hours clocked on any given day. Staying late creates overtime outside the block, while leaving early leaves the block unfilled. Your payroll begins with this scheduled timetable, but hours worked beyond it are added and unworked hours may be deducted.