Ⅳ. Contractual Working Hours

1. Concept

When the Labor Standards Act(LSA) is revised, related rulings also change. A representative example is the change of the Supreme Court ruling in relation to the inclusive wage system as contractual working hours are introduced as mandatory items in employment contracts. Prior to July 1, 2007, the LSA stipulated wage, working hours and other working conditions acceptable for employment contracts, but since that date, it now stipulates wage, contractual working hours, statutory holidays, statutory leave and other working conditions. This means that a previous employment contract that specifies only “working hours” remains unclear in content, but the revised law stipulates that it should include “contractual working hours”. Contractual working hours refer to the time set by the employer that the employee is to work, within the allowable total working time(40 hours per week, 8 hours per day)(Article 2, paragraph 8 of the LSA). Therefore, since the revision, the wage in accordance with the contractual working hours has to be specified, which in effect limits the inclusive wage system.


[Before revision(prior to July 1, 2007)]

Article 24 (Stipulation of Working Conditions) The employer shall specify the wage, working hours and other working conditions for workers at the time the employment contract is concluded


[After revision: Labor Standards Act[Implemented July 1, 2007]]

Article 24 (Stipulation of Working Conditions) The employer shall notify the employee of the wage, the contractual working hours in accordance with Article 20, holidays in accordance with the provisions of Article 54, annual paid vacation in accordance with the provisions of Article 59, and other working conditions to be determined



In order to understand the content of such changes, it is necessary to examine specifically the meaning of the contractual working hours introduced with revision of the Labor Standards Act in 2007. In this regard, I would like to discuss the judicial precedents introduced due to the revised law, and then look into the types of suitable employment contract where an inclusive wage system is justifiable.

2. Details of Contractual Working Hours

(1) Regulations on contractual working hours

Contractual working hours shall be determined between the worker and employer in the range of working hours pursuant to Article 50(Work Hours) and Article 69(Work Hours for Minors) of the Labor Standards Act, or Article 139(Hazardous and Dangerous Work) of the Occupational Safety and Health Act. This means that the contractual working hours must be set within the statutory working hours. Article 17 of the Labor Standards Act requires wage, contractual working hours and other working conditions to be specified in the process of making an employment contract. Therefore, wage defined in the employment contract are limited to 40 hours a week, and in principle, inclusive wage are a violation of the Labor Standards Act. Article 58 stipulates that if a worker fails to calculate working time by working all or part of the working hours outside the workplace due to business trips or other reasons, he/she shall be deemed to have worked the contractual working hours. Even for part-time workers, “the employer shall obtain the consent of the employee concerned if they have a part-time worker work beyond the contractual working hours prescribed in Article 2 of the Labor Standards Act. In this case, such employee cannot work more than 12 hours a week. The employer shall pay the part-time worker an additional 50% or more of the ordinary wage for the overtime exceeding the contractual working hours”(Article 6 of the Act on the Protection Etc. of Fixed-term and Part-time Employees). In the past, overtime pay was introduced only for working hours exceeding legal standard working hours. However, for part-time workers, the overtime pay shall be paid if the working hours exceed contractual working hours(introduced on March 18, 2014). This means that if the part-time worker has 20 contractual working hours per week, an additional wage shall be paid for the hours exceeding those 20 contractual working hours.

(2) Reasons for limiting work hours

Contractual working hours refer to the time within the legal standard working hours that the worker has to work. Here, legal standard working hours generally refer to 40 hours per week and 8 hours per day. The 12-hour limitation on extended work is for hours in excess of statutory working hours(Article 53 of the LSA). Overtime work for part-time workers is also recognized within a limit of 12 hours beyond the weekly contractual working hours of part-time workers. That is, extended hours for part-time workers are judged based on contractual working hours rather than legal standard working hours(Article 6 of the Act on the Protection Etc. of Fixed-term and Part-time Employees). In Article 17 of the LSA, stipulating the contractual working hours in the employment contract is mandatory, and then based upon this, wage and contractual working hours are determined. This limits the maximum working hours and ensures the right of employees to protect their health and pursue happiness.
The inclusive wage system refers to a wage system that does not calculate basic wage in advance for a given working time, but rather stipulates that daily or monthly wage shall include the total amount of statutory working hours plus additional working hours. Since the LSA stipulates that basic wage and contractual working hours shall be defined in the employment contract, the inclusive wage system is in effect in violation of that Act.

3. Changes in Court Rulings regarding an Inclusive Wage System

(1) Court rulings – details of changes

Related rulings can be divided into those before and those after July 2007. Before July 2007, the courts did not specifically determine contractual working hours because employment contracts were not required to stipulate wage, working time or other conditions. In other words, even if the basic wage was not calculated in advance but the inclusive wage equaled the sum of applicable allowances plus the monthly wage in a way that was not disadvantageous to the employee, it was considered valid. As a result, it was possible to accept the inclusive wage system for both jobs where the working hours were difficult to calculate, and jobs where the working hours were not difficult to calculate, but the system was conducive to convenient management.

Changes in Court Ruling regarding Inclusive wage


[Before revision (prior to July 1, 2007)]

The Supreme Court concluded that if an employer receives the consent of the employee as a means of encouraging the convenience of calculating working hours and promoting employee willingness, and it is not disadvantageous to the employee in light of collective agreements and rules of employment, the inclusive wage agreement in a collective wage system is valid.248)


[After revision: (July 1, 2007 on)]

In 2010, the Supreme Court distinguished between cases where it was difficult to calculate working time and cases where it was not. ① In cases where it is deemed difficult to calculate working hours such as surveillance work, even if a so-called inclusive wage contract is concluded, it is valid if it is not disadvantageous to the employee and is recognized as justified in light of various circumstances. ② If there is little difficulty in calculating working hours, the principle of wage payment according to working hours in the Labor Standards Act shall apply unless there are special circumstances in which it is impossible to apply the provisions of the Labor Standards Act.249)



In 2010, however, the Supreme Court ruled that the difficulty of calculating working hours would determine whether an inclusive wage system was justified and that such a system was not acceptable if the working hours could be calculated. This case is considered to have set a related precedent because the employment contract specifies contractual working hours in accordance with Article 17 of the LSA. In other words, the basic wage shall be determined on the basis of the contractual working hours when concluding an employment contract, and in principle, the inclusive wage system cannot be introduced when working time can be calculated. Thus, the inclusive wage system is acceptable for workers with supervisory and intermittent duties that make it difficult to calculate working time, but not easily for workers whose working time can be calculated. Amendment of the Labor Standards Act resulted in the following changes in rulings on inclusive wage.

(2) Trends in rulings on the current inclusive wage system

Since July 2007, consistent judicial precedents have been set, denying the existing inclusive wage system. A Supreme Court case in 2014 provides a clear explanation: “In cases where the inclusive wage system can be deemed justifiable, it is necessary to consider the type and nature of the work(such as whether it involves surveillance and intermittent work), and the difficulty of calculating the working hours when considering the working time. The amount of allowance included in the statutory allowance is set as a monthly benefit or daily wage, or the basic wage calculated in advance, but if the statutory allowance is not classified and a fixed amount is set as the statutory benefit allowance, it is valid when a wage contract under the inclusive wage system is concluded. However, it shall not be disadvantageous to the workers. Therefore, it is justified in light of the various circumstances mentioned above.”
In addition, the rulings also reject the inclusive wage system if calculation of the working hours is not difficult, unless there is a special situation where the working hours regulation in the Labor Standards Act cannot be applied. In this case, if a contract is concluded in advance under the inclusive wage system, the inclusive wage contract shall be judged legal or not after reviewing if the statutory allowance included in the inclusive wage is correct. If the wage paid under the inclusive wage system fall short of the statutory allowance calculated according to the standards established by the LSA, and if it will be disadvantageous to the employee(s), it shall be null and void. In such a case, the company shall compensate the employee(s) equal to the amount to be paid in legal standard allowances.

(3) When it is difficult to calculate working hours

If calculation of working hours is difficult, the inclusive wage system can be introduced. The following types of work to which this system is applicable are presented in the Labor Standards Act.

1) Supervisory/intermittent work
The working hours, rest and holiday regulations in the Labor Standards Act shall not apply to workers engaged in supervisory/intermittent work once the employer has received approval from the Minister of Employment and Labor(Article 63(3)).

2) Work outside the workplace
If a worker is unable to calculate working time due to working all or part of the working time outside the workplace(or other reasons), he/she shall be deemed to have worked the contractual working hours(Article 58(1)).

3) Discretionary work
The discretionary work in Article 58(3) of the Labor Standards Act refers to tasks where it is difficult to calculate working time because of the characteristics or performance rather than the amount of work. Written consent is required from the employee representative in order to qualify the work as within the contractual working hours. Specific tasks include designing and analyzing research and development and information processing systems, organizing articles for newspapers and broadcasts, designing and designing-related job, and producing and supervising broadcasting and film production(Article 58, Clause 3).

4. Case Studies on Introducing an Inclusive Wage System

(1) Inclusive wage agreement for workers in a restaurant business

1) Inclusive wage system
Workers work for 6 days from Monday to Saturday, and work 8 hours a day over the hours from 11 am to 10 pm(resting between 2 pm and 5 pm), and earn a monthly salary of 3 million won, including pay for overtime.
If the employment contract is written as above, 3 million won will be the basic wage, with an extra wage of 753,588 won per month: 150 percent for an additional 8 hours per week(35 hours per month) paid additionally.

2) Suggestions for correction
There are 40 contractual working hours per week and 8 hours per day. The monthly base rate for this is 2,401,560 won, with overtime of 598,437 won for 8 additional working hours per week. Therefore, the monthly total amount is 3 million won. This amount should be divided into two parts: 80 percent as basic pay and 20 percent for overtime pay. To be recognized as a justifiable inclusive wage contract, the monthly wage for the contractual working hours shall be clarified, and the additional working hours and wage stipulated and paid.

(2) Inclusive salary for white-collar workers

1) Issue
For some specific white-collar workers, the monthly wage is set at 76% basic wage and 24% fixed overtime allowance. Under this standard, the inclusive wage-based employment contract includes 40 hours of work per week plus an additional 10 hours per week. The company pays inclusive wage every month to the workers regardless of whether they worked overtime or not. Therefore, it is not necessary for the company to pay an additional overtime allowance for up to 10 hours of extended work. Is this inclusive wage system for these white-collar workers possible under current law?

2) Judging whether the inclusive wage system violates current law
There have been two judicial precedents for determining whether an inclusive wage system is possible for white-collar workers. The first involved a white-collar worker employed by a foreign life insurance company. In this case, the court deemed it difficult to calculate working hours, unlike production workers, because the business culture common to this company centered on performance tasks due to the nature of the company’s insurance sales work. In such cases, the inclusive wage system was recognized. The second involved white-collar workers who concluded an inclusive wage contract by signing a collective agreement offering a fixed overtime allowance of 10 hours per week for 40 hours of work per week. Workers did not receive any extended allowance for up to 10 hours a week even if overtime was performed that week. The Supreme Court concluded that such a wage system cannot be regarded as monthly remuneration based on an hourly wage or as a legitimate inclusive wage system in light of the fact that workers can calculate their hours easily.
Judging from the principle in rulings on the inclusive wage system and the above two examples, the criteria for determining the justification for an inclusive wage system is whether the working hours of workers can be calculated or not.

5. Conclusion
The purpose for making it mandatory to list the contractual working hours in the employment contract is to ensure that workers are able to pursue happiness and maintain human dignity while providing work within statutory working hours. Since the inclusive wage system promotes long hours of work, it shall be applied only to those industries where there is significant difficulty in calculating hours worked. Long working hours have been the widespread norm for white-collar workers through the inclusive wage system, which is based on a fixed overtime allowance. This can be said to be a violation of the principle that wage must be calculated according to the contractual working hours. Therefore, there should be restrictions on fixed overtime allowances that may result in long hours of work for office workers.