Billing of annual subscription is based on the same principle as in case of monthly billing - imagine you start your annual subscription on, let's say, March 25th 2018. As you complete the subscription process, you'll be billed the same day and the next billing date is exactly one year from the start - on March 25th 2019 (unless you cancel the subscription before that date, of course).

Don't worry however - we'll send you an email 1 week before the annual subscription is supposed to be renewed, so that you have time to manage everything.