14-15-Year-Olds Work Restrictions. When school is not in session, 14 and 15-year-olds may only work between 7 a.m.Restrictions on Hours Worked for Minors Ages 14 and 15. Minors ages 14 and 15 may not work in the following instances: Before 7 a.m. 14-15 year olds may work up to 8 hours per day, 40 hours per week, unless attending summer school. From June 1 - Labor Day may work between 7am and 9pm. Minors ages 14 and 15 must work within prescribed scheduling restrictions, as outlined below. When school is not in session, 14- and 15-year-olds may only work between AM and PM and no more than eight hours a day, or 40 hours a week. Although 14 and 15yearolds can work in Pennsylvania, they can't do so without restrictions. For example, they may not work before 7 a.m.