Progus does not attach a Shopify discount code to an existing subscription. Instead, set a price or discount on each product line. This is available on every Progus plan.
Before you start
For Mollie subscriptions, price editing is unavailable for prepaid, Club, invoice, Adyen, and free-of-charge subscriptions, and for products inside a build-a-box subscription.
Step 1: Open the subscription
Open Subscriptions from the app navigation.
Click the matching subscription.
Step 2: Open the editor
Under Subscription details, click Edit.
Step 3: Open the price
For a Shopify-billed subscription, click the product's current price to open Edit price.
For a Mollie-billed subscription, click Edit price beside the product.
Step 4: Set the discount
If the editor shows discount options, choose Percentage off, Amount off, or Fixed price.
If it does not, the field is Subscription price.
Enter the value.
Click Update.
Repeat the price edit for every product line that should receive the discount.
Step 5: Finish the change
For a Mollie-billed subscription, this saves the price and shows the next charge amount.
For a Shopify-billed subscription, click Save.
What to do next
Stuck on any of this? Open the chat in the bottom right corner of the app and we will help you set it up.
Last verified on 2026-10-28 against progus-subscriptions 52d606d1 (kb-ref: apply-a-discount-to-an-existing-subscription).