get the most out of xfinity from comcast by signing in to your account. get the most out of xfinity from comcast by signing in to your account. pay online or with the xfinity app. Click on the account icon in the upper righthand corner of xfinity. com to pay your bill, check your balance, see your billing history, sign up for automatic payments and paperless billing, and so much more. All online, available 24/7. there are many convenient ways to pay your xfinity bill. Regardless of the status of…