Step 1: Enter xbox official website, click on the upper left corner to log in to your Microsoft xbox account, and click on the game.

step 2: click on a game you need to buy casually. here, take the game extreme racing 7 as an example.

step 3: click buy now after entering the game purchase page.

step 4: after entering the payment page, click add a payment method.

step 5, fill in your credit card and identity information, and you will successfully bind your Xbox account to the credit card.