If you are on autopay, Roll20 is good about billing you on the same day for whatever cycle you are on. If you check your Account: <a href="https://app.roll20.net/account/" rel="nofollow">https://app.roll20.net/account/</a> look under the Manage Your Subscription section on the right, click the Past Invoices >> link, and you should see the previous dates Roll20 has billed you. From that, you should be able to project when your next bill will be. If you are not on autopay, you may want be sure to pay manually on the date determined from the above.