By default, Professional and Enterprise subscriptions auto-renew. We’ll remind you by email in plenty of time that we’re going to take payment.
Note: You can turn auto-renew off on the Billing page of your RealVNC account, but please make sure you press the Renew Now button on that page in plenty of time or remote access will stop.
For all Professional subscribers, and most Enterprise subscribers, we'll automatically handle relicensing VNC Server running on all your remote computers for you when you renew. There's no need to do anything.