If you want to offer your customers an incentive to purchase a membership, you can offer a membership promotion. To get started, go to Set Up Tab > Memberships > Set Up Promo Codes (this is optional and should be available once you have set up the membership plans on your account):
Click "New Promo Code" and configure a new code:
Code - name of the code
Description
Discount Type -can be either a percentage or a fixed amount per billing period
Discount Amount - the amount or percentage to be discounted off the subscription price.
Applies forever? - decide if this promotion discounts the price for all future billing periods, or just the first X billing periods.
When the customer is purchasing a subscription to your membership plan, they will have the option of entering this promo code on the check out page: