Credit Building: Most major credit-card companies report authorized users’ account information to the major credit bureaus each month. Assuming the information reflects responsible use, this process will help to improve the authorized user’s credit standing, perhaps elevating it all the way to the “excellent” range over time. However, the gains aren’t likely to come as quickly as if the individual had his or her own credit card account. So for the best results, we recommend combining authorized use with a starter credit card, even if it’s secured.