How do additional HP PAYS Ink pages work?

Once you have printed all the pages in your plan, and you have used all your rollover pages, additional sets of pages will be automatically charged on your HP PAYS Ink account. See the plan for the price of these excess charges.

But please note that, as long as your printer is connected to the Internet, HP will send you anotification email when you are about to reach your monthly page limit. At this point you might want to consider upgrading your plan rather than paying for additional pages.