Automatic Recurring Payments enables you to charge subscribers for a fixed amount of money on a regular schedule.

You can enable it for Monthly, Quarterly, Semi-Annual and Annual renewal periods. Recurring payments are setup for each member level.

Detailed information available at http://help.wildapricot.com/display/DOC/Recurring+payments

Note: This feature is available for some billable plans only - from Community plan and above. It is enabled in trial accounts so you can evaluate it.