Adding a discount code from Subscription Manager is in alpha as a part of Shopify Discount Codes 2.0, currently in active development.
Ordergroove has now introduced the ability for a customer to add a discount code to an existing subscription via the Subscription Manager. Subscription Manager templates v25.1.2 or later support this functionality out of the box.
Enabling for SM versions v25.1.2 or later
Your success/solutions team member must provide you with confirmation that your store is ready to go live with Discount Codes. Once you have received confirmation:
In the advanced SM theme editor, navigate to Controls > theme-settings.json. Within the object {}, ensure the following flag exists and is true
"discount_codes_enabled": true
Save the changes to your Subscription Manager theme.
Enabling for SM versions v25.0.0 - v25.1.1
If you'd like to add this functionality to a previous template version or access it directly via API, please reach out to your Ordergroove success member. We recommend updating to the latest version of SM v25 templates if possible, but can provide migration instructions for pre-v25.2 versions upon request.