I would like to know if I can work part-time without any problems

Questioner

I have a 32-hour per week contract in a supermarket, but I want to start a part-time business (sole proprietorship) in addition to this. My employment contract states the following: the employee with a full-time employment contract is prohibited from working for another employer or client during the term of the employment contract, neither directly, indirectly, nor on his own account to do business, unless written permission has been obtained from the employer. Since 32 hours is a part-time job, I don't think it would be a problem to start (small-scale) and register with the Chamber of Commerce. What is your opinion and should I inform my employer?

Lawyer

You do not need permission from the employer. It is wise to report this. I assume you are not going to compete with the employer? If you do, the matter may be different.