You will be billed immediately after subscribing to a paying plan or upgrading your account from a freemium to a paying plan. If you choose the monthly subscription, and you decide to unsubscribe, you will only pay the month you’re currently in. If you choose the yearly subscription, you will get a 12% discount and the whole year will be billed. If you decide to upgrade your paid plan, you will get a refund of the remaining time of your current plan before paying the new plan.