Instructions
Add Points With a Prepaid Code
Log in to your Xbox Live profile on your Xbox 360.
Open the "Guide" pop-up menu by pressing the "Xbox" button on your controller.
Scroll toward the right to select the "Settings" blade.
Choose "Account Management." The "Guide" menu will close, and a new list of options will appear.
Select "Redeem Code."
Enter your points code into the pop-up field. The points will add to your account's total after inputting the 25-digit code.
Add Points With Credit Card
Log in to your Xbox Live account on official Xbox website (see Resources).
Go to the "Add Microsoft Points" page (see Resources).
Choose how many points you would like to purchase.
Click "Next."
Select "Confirm Purchase" from the following screen. If you don't have a credit card set up with Xbox Live, instead click "Add a New Credit Card."