We'll charge you a pro-rated amount to cover your new member's account for the remainder of the current billing period.
As an example, suppose your team is on the "Business Plan," which costs $12.99 per user a month. You add a new team member 10 days into your billing period and there are 20 remaining days in the month. The per-day cost for each user is $12.99 / 30, so we will make a one-time charge of $8.66.
Next month, we'll charge you $12.99 for each member in your team. For example, if your team comprises of 5 members on Business Plan, we'll charge you for $64.95 (5*12.99).