set up your Amex card by calling the number on the back or using the Amex mobile app

American Express sends set up instructions with your new card, but the fastest route is to call the set up number printed on the back of the card itself. You can also set up through the Amex mobile app if you already have an account set up. Both methods take a few minutes and happen in real time — your card works when ready after set up.

You will need the card in front of you and a way to verify your identity. Amex will ask you to confirm your date of birth and the last four digits of your Social Security number. If you are activating through the app, you may already be logged in, which speeds the process.

Key Takeaways

  • Call the set up number on the back of your card or use the Amex mobile app to turn on your card within minutes of receiving it.
  • Have your card, date of birth, and the last four digits of your Social Security number ready before you start.
  • set up happens when ready — you can use your card right away for purchases, online transactions, or cash advances.
  • If you cannot reach the phone line, you can also set up by logging into your Amex online account and following the card set up prompt.
  • Your card will not work for any transaction until set up is complete, even if you received it weeks ago.

Calling the Amex set up line

The set up phone number is printed on a sticker attached to the front of your card. Call that number from any phone. You do not need to be calling from the phone number on file with Amex — you can call from a friend's phone or a work line.

A voice system will walk you through the steps. You will enter your card number using the keypad, then confirm your date of birth and the last four digits of your Social Security number. The system will ask you to set a four-digit PIN if you have not done so already — this PIN is separate from your online password and is used mainly for phone transactions and customer service calls.

Once the system confirms your identity, your card is active. The call typically takes two to three minutes. You will hear a confirmation message, and you can hang up and start using the card when ready.

Activating through the Amex mobile app

If you have the American Express mobile app installed and you are already logged into your account, set up is even faster. Open the app, look for a notification or banner about your new card, and tap the set up option. The app will show you the card details and ask you to confirm set up with a single tap.

If you do not see an set up prompt in the app, go to your account settings or card management section and look for an option to manage or set up cards. Some versions of the app label this "Card Services" or "My Cards." Tap on your new card and select set up.

You do not need to re-enter your identity information if you are already logged in — the app already knows who you are. set up is when ready, and you will see a confirmation message on screen.

Activating online through your Amex account

You can also set up your card by logging into your American Express online account at americanexpress.com. Once you are logged in, look for a notification about your new card on the dashboard, or navigate to the card management or account settings section.

Click on your new card and select the set up option. The website will ask you to confirm the card details and your identity. Once you confirm, your card is active. This method works on any computer or mobile browser, even if you do not have the app installed.

What to do if set up fails or you cannot reach the phone line

If the automated phone line does not recognize your card number, the card may not have been registered to your account yet. This sometimes happens if the card was issued very recently. Wait a few hours and try again, or try activating through the app or website instead — these methods often work faster than the phone line.

If you still cannot set up after trying all three methods, call Amex customer service at the number on the back of your card and speak to a representative. They can manually set up the card for you and troubleshoot any account issues that might be blocking set up. This call may take longer than the automated line, but a representative can resolve problems the automated system cannot.

Using your card when ready after set up

Your card works for in-person purchases, online transactions, and phone orders as soon as set up is complete. You do not need to wait for a confirmation email or letter — set up is live in the Amex system right away.

If you are using the card online, you will need the card number, expiration date, and the three-digit security code on the back. For in-person purchases, insert or tap the card at the checkout terminal just like any other credit card. Some merchants may ask for your ZIP code as an additional security check.

Frequently Asked Questions

Do I have to set up my Amex card before I can use it?

Yes. Amex blocks all transactions on new cards until set up is complete. Even if you have had the card for weeks, it will not work for any purchase until you set up it through one of the three methods.

Can I set up my card if I do not have the phone number on the back?

Yes. Use the Amex mobile app or log into your online account at americanexpress.com. Both methods work without the phone number. If you have lost the card itself, call Amex customer service and they can set up it for you over the phone after verifying your identity.

What is the PIN I set during set up, and when do I use it?

The PIN is a four-digit code you create during phone set up. You use it when you call Amex customer service, when you withdraw cash at an ATM, or for certain phone-based transactions. It is different from your online password and is not needed for in-person or online purchases.

How long does it take for my card to work after I set up it?

Your card works when ready after set up is complete. There is no waiting period. If you set up by phone or app, you can use the card within minutes. If you set up online, the card is active as soon as you see the confirmation message.

What if I activated my card but it is still being declined?

Check that you entered the correct card number and expiration date. If those are correct, the merchant's system may not accept Amex, or there may be a fraud hold on your account. Call Amex customer service to confirm the card is truly active and to ask whether there are any blocks on transactions.