Technically, there is no minimum age for starting a business on your own. However, if you are under the age of 18, you will run into many problems because you have not yet reached the age of majority. For example, you will not be legally allowed to enter into most of the contracts that you will need, and you may not be able to get a credit card or bank loan. You will need the help of someone who is over 18, such as a parent, guardian or other responsible adult. Last Reviewed: August 2019