It doesn’t mean that working overtime is considered overtime if it’s more than 8 hours. It depends on what kind of working hours system the company and the employee have agreed upon.

In the standard working hours system, overtime pay must be paid if the hours exceed 8 hours. Not paying overtime is a violation of the labor law. In the comprehensive working hours system, the total working hours of employees in a certain period must be considered to see if it exceeds the legal standard. Simply working over 8 hours for one or two days does not count as overtime. The irregular working hours system is generally applicable to senior executives and is more flexible. Of course, the latter two working hours systems must be filed with the labor department.