According to a blog post Android PoliceGoogle would be working on new cards for Google Now and, one of them, would be a reminder to pay for your accounts.
According to information from a blog source, the card will display a notification with the amount and maturity date of the account to be paid and, together with that, a link for online payment of the invoice.
There's still no confirmed service information and no prediction of when they would release the tests. The image above the post is an idealized reproduction from the rumors.
Source: Android Police