What an Authorized User on American Express Platinum Actually Does
An authorized user is someone you add to your American Express Platinum account who gets their own card linked to your account. They can make purchases, but you remain responsible for all charges — the bill comes to you, and the account history appears on your credit report, not theirs. American Express does not run a credit check on the person you add, and they do not need their own Amex account first.
The authorized user does not have access to your online account, cannot change the card's terms, and cannot add other users themselves. They straightforward spend using the card you issue them. You can set spending limits through your Amex online account or by calling the number on the back of your card, and you can remove the card at any time.
Key Takeaways
- You can add an authorized user by logging into your American Express account online, calling the customer service number on your card, or visiting an Amex office in person.
- American Express does not charge a fee to add an authorized user to a Platinum card, though some Amex cards do charge for additional users.
- The authorized user's purchases count toward your annual spending and may help you reach bonus categories or thresholds, but all charges appear on your bill.
- You remain fully liable for every purchase the authorized user makes, so only add someone you trust completely with spending decisions.
- The authorized user's card activity does not appear on their own credit report — only on yours — so adding them does not build their credit history.
How to Add Someone as an Authorized User
The fastest method is through your American Express online account. Log in, find the card you want to add a user to, look for a link labeled "Manage Card" or "Add Authorized User," and follow the prompts. You will need the person's full name, date of birth, and home address. Amex will mail a new card to the address you provide, which usually takes 7 to 10 business days.
If you prefer to do it by phone, call the customer service number on the back of your Platinum card. A representative will ask for the same information and can often expedite the card if you need it sooner. Some Amex locations also allow you to add an authorized user in person, though this is less common than online or phone methods.
Once the card arrives, the authorized user can begin making purchases when ready. You can set a spending limit through your account settings or by calling Amex, and you can change or remove the card at any time without notice to the cardholder.
Costs and Fees for Adding an Authorized User
American Express does not charge a fee to add an authorized user to the Platinum card. This is different from some other Amex products — for instance, some business cards charge $50 or more per additional user — but the personal Platinum card includes authorized users at no extra cost.
You do pay the full annual fee for the Platinum card itself, which varies by offer and is not waived by adding an authorized user. The authorized user's purchases are billed to your account just like your own, so there are no separate charges or statements.
What Happens to the Authorized User's Credit Report
Adding someone as an authorized user does not build their credit history. The account activity — payments, balances, and spending — appears only on your credit report. The authorized user's own credit report remains unchanged, so this is not a way to help someone establish or rebuild credit.
However, if you fail to pay your Platinum bill, the negative mark appears on your credit report. The authorized user is not responsible for the debt and will not see the delinquency on their own report, but they will lose access to the card if the account is closed or suspended.
Removing an Authorized User or Changing Their Limits
You can change the spending limit or remove the card entirely through your American Express online account without calling. Log in, select the card, find the authorized user's name, and choose "Edit" or "Remove." Changes take effect when ready, though the cardholder may not realize their card no longer works until they try to use it.
If you want to notify the person before removing their card, you can do that separately. Amex will not contact them on your behalf. If the authorized user's card is lost or stolen, you can report it the same way you would report your own card — through your account or by calling customer service — and Amex will cancel it and mail a replacement to you.
Why You Might Add an Authorized User to Your Platinum
The most common reason is to let a family member or trusted colleague use the card for everyday purchases. Since all spending counts toward your annual total, adding an authorized user can help you reach bonus spending thresholds faster if your card offers a rewards bonus based on annual spending.
Some people add an authorized user to a card they do not plan to use themselves, letting the other person handle all the spending while they manage the account and pay the bill. This can be useful if you want to centralize expenses — for example, a parent might add a college-age child as an authorized user to cover school-related purchases while keeping oversight of the account.
Keep in mind that you are responsible for all charges, so only add someone whose spending habits you understand and trust. There is no way to prevent an authorized user from making a large purchase, only to set a limit and monitor the account regularly.
Frequently Asked Questions
Can an authorized user make their own purchases without asking me first?
Yes. Once you issue the card, the authorized user can spend up to any limit you set, and you will not be notified before each purchase. You can review all transactions through your online account or monthly statement. If you want to restrict spending, set a limit before giving them the card.
Does adding an authorized user affect my credit score?
No. Adding an authorized user does not trigger a hard inquiry on your credit report, and it does not change your existing accounts. However, if the authorized user makes large purchases that increase your balance, your credit utilization ratio may rise, which could lower your score slightly.
What if the authorized user runs up a large bill?
You are responsible for paying the entire balance. American Express will not pursue the authorized user for payment. If you cannot pay, the account will be reported as delinquent on your credit report. Before adding someone, make sure you can cover their spending if needed.
Can I add an authorized user who does not live with me?
Yes. You can add anyone and mail their card to any address. There is no requirement that they live in your household. However, you remain liable for all their purchases, so only add people you trust completely.
Will the authorized user see my account balance or payment history?
No. The authorized user can only use the card to make purchases. They cannot log into your account, see your balance, view your payment history, or change any account settings. Only you have access to that information.