Google Voice is billed through the Google Admin console. Your invoice shows monthly charges that you accrued. If you buy Google Voice from an authorized Google partner, the partner bills and invoices you. You can assign Google Voice users either a new or ported number. Your monthly charges include quotas for both new and ported numbers, each equal to your number of assigned Google Voice licenses. Numbers beyond each quota, if assigned or available to assign, will incur a monthly fee on a prorated basis. Google won’t charge for numbers over your quota until at least March If you have unassigned numbers you don’t want, you can release those numbers before the date you start to incur a monthly fee. You can review how many Google Voice numbers your organization is using, both included numbers and numbers that incur a monthly fee.