Where to change your American Express username
You change your American Express username through your online account on the American Express website or through the American Express mobile app. The process is the same on both — you go to your account settings, find the login credentials section, and update your username there. American Express does not handle username changes by phone or in person at a physical location.
Before you start, have your current password ready. American Express will ask you to enter it to confirm the change, as a security step. If you have forgotten your password, you can reset it before changing your username, or reset it after — either way works.
Key Takeaways
- Log into your American Express account online or in the app, then go to Account Settings to find the login credentials or username section.
- You will need to enter your current password to confirm any changes to your username for security reasons.
- The new username must be between 6 and 32 characters, cannot contain spaces, and cannot be the same as your old username.
- After you change your username, you will use the new one the next time you log in — your old username will no longer work.
- If you cannot find the username change option in your account settings, contact American Express customer service for help locating it.
Steps to change your username on the American Express website
Start by going to americanexpress.com and logging in with your current username and password. Once you are logged in, look for "Account Settings" or "Settings" — this is usually in the top right corner of the page, often under a menu with your name or a gear icon.
Click on Account Settings, then look for a section called "Login Credentials," "Username," "Sign In," or "Account Access." The exact label varies depending on which American Express product you use (personal card, business card, or Amex Serve). Once you find it, click the option to edit or change your username.
Enter your current password when prompted. Then type your new username in the field provided. American Express requires usernames to be 6 to 32 characters long, with no spaces. You can use letters, numbers, and some special characters like underscores or hyphens, but check the on-screen instructions for the exact rules. Click save or confirm, and your username is changed.
Steps to change your username in the American Express mobile app
Open the American Express app and log in if you are not already. Tap the menu icon — usually three horizontal lines in the top left or bottom right corner, depending on whether you use iPhone or Android.
Look for "Settings" or "Account Settings" in that menu. Tap it, then find the section for login information, username, or account access. Tap the option to change your username, enter your current password, type your new username, and tap save.
The app may ask you to log out and log back in with your new username to confirm the change. If it does, do that right away so you know the new username is working.
What happens after you change your username
Your old username stops working when ready. The next time you log in to American Express — whether on the website or in the app — you must use your new username and your password. If you try to use your old username, you will see an error message saying the username is not recognized.
If you are logged into the app on your phone or computer, you may be logged out automatically after the change. Log back in with your new username. If you use American Express on multiple devices, you will need to log in again on each one with the new username.
If you cannot find the username change option
Some American Express accounts — particularly older ones or certain business accounts — may not show a username change option in the settings menu. This can happen if your account was set up before American Express added this feature, or if your account type does not support self-service username changes.
If you have looked through Account Settings and cannot find the option, contact American Express customer service. You can call the number on the back of your card, or use the chat or message feature in your account online. Tell them you want to change your username, and they can either walk you through where to find it or make the change for you directly.
Rules for your new username
Your new username must be unique to your account — no one else using American Express can have the same username. It cannot be the same as your old username, even if you wanted to switch back. American Express will reject it if you try.
The username must be between 6 and 32 characters. You can use uppercase and lowercase letters, numbers, and usually underscores or hyphens. You cannot use spaces or most special characters like @, #, or $. When you are typing your new username, the screen will tell you if it breaks any of these rules.
Your username is not the same as your password. You can change your username without changing your password, or change your password without changing your username. They are separate pieces of information that American Express keeps track of separately.
Frequently Asked Questions
Can I change my username if I have forgotten my password?
Yes. Go to the American Express login page and click "Forgot Password?" to reset it. Once you have set a new password, log in and change your username through Account Settings. You do not have to do these in any particular order.
Will changing my username affect my credit card or account balance?
No. Your username is only used to log into your account online or in the app. Changing it does not change your card number, billing address, rewards balance, or anything else about your actual account. It only changes how you sign in.
What if someone else has already taken the username I want?
American Express will tell you the username is unavailable and ask you to choose a different one. Try adding a number or underscore to the end, or pick a different username altogether. The system will let you know right away if your choice is available.
Do I need to change my username on my phone and computer separately?
No. You change your username once in your American Express account, and it applies everywhere. However, you may need to log in again on each device with the new username if you were already logged in before the change.