Your system will automatically set a next bill date for a membership once it is activated. This date may vary dependent on how you have set up your membership types. 

• Membership renews on anniversary date. The next bill date will be the anniversary date.
• Membership renews everyone on the same date. The next bill date will be the 1st of the month selected when setting up membership types.

See Add a New Membership Type for more details.

To update a Next Bill Date use the Adjust Membership function.