Auto-renewal can be set be set in the Membership Setup tab for any membership page. 

• Select Enable Auto-Renewal to YES. A box will appear above the registration information to opt-in to auto-renewal.
• You can customize the label in the Auto-Renewal Comment text box.
• You can make this the default option with Default Auto-Renewal to YES, then the member would need to "uncheck" the box to opt-out of auto renewal.
• You can also Require Auto-Renewal. If this is set to YES, you also have the option to Hide Required Auto-Renewal from the page.
• Auto-renewal requires a credit card for purchase, so pay-later options should not also be activated.

• By default, the memberships with rolling membership expiration dates will renew into the same membership page and level and no further action is required.
• You have the option of modifying where the membership will renew if you are changing membership page names or levels. On the bottom of each membership level, you can set the Membership Name (page) and Membership Level to apply to the renewal.
• For hard expiration date memberships with auto-renewal activated, you must select which membership page and level that will apply to the renewal since a new membership page is required for each year. 
• This information must be updated for all levels prior to your hard membership expiration date to ensure the renewals will properly process.
• You can learn more about hard expiration dates in the article "What is a Hard Expiration Date?"