Hi! Congratulations on your excellent credit score. You can investigate different possible cards at our website - https://wallethub.com/credit-cards/. It’s is going to help your son build his credit to be an authorized user on your card. That said, you want to make sure you don’t get yourself into any financial trouble. You’ll be viewing and paying the bill, I assume, so you will see each month what is being spent. You also might want to put a limit on how much he as an authorized user can spend – most if not all card allow that. For example, you may have a $10,000 credit limit; you can go in online and give your son’s card a $1000 limit. Best wishes to you!!