Access Payment Settings:
Log in to your Meta Ads Manager account.
Select the Billing & payments menu item from the left-hand section of your screen.
In the Billing & payments section, click on Payment methods.
Edit Payment Method:
In the Payment methods section, locate the payment method you wish to update.
Click on the three dots (⋯) icon next to the payment method.
Select Edit from the dropdown options.
Update your billing information as necessary.
Click Save to apply the changes.
Important considerations
Adding a new Payment Method:
If your existing payment method has expired or you need to change critical details (e.g., card number), it's advisable to add a new payment method:
Click on Add Payment Method.
Enter the new payment details.
Click Save.
To set it as your primary payment method, click Make Primary next to the new payment method.
Removing an old Payment Method:
Ensure you have at least one active payment method before removing an old one:
Click the three dots (⋯) icon next to the payment method you wish to remove.
Select Remove.
Confirm the removal when prompted.
For more detailed information, refer to Meta's official guide: Add a payment method for Facebook ads
By following these steps, your future ad charges will be processed using the updated billing information.