How many hours can a 15-year-old work is surprisingly flexible. However, because you must remain in school while you’re working, there are some rules you and your employer must appreciate and follow. During term time, you can only work a maximum of 12 hours a week. You can work a maximum of 2 hours on school days and Sundays. On Saturdays, you can work for a maximum of 8 hours. However, you are not allowed to work before 7 am and after 7 pm, and you cannot work during school hours, sorry! During the school holidays, you can work a maximum of 35 hours a week. This is divided into 8 hours on weekdays and Saturdays. You are only allowed to work a maximum of 2 hours on Sundays. As a 15-year-old, you must have at least 1 hour break for every 4 hours worked. You also have to take a 2-week break from school and working once a year.