✨ Available on Subi Plus plans only
⚠ Requires Shopify Plus (Checkout Extensibility)
❌ Not compatible with Membership products
What Is Checkout Upgrade?
Checkout Upgrade is a Shopify Checkout UI extension that:
Detects products added as one-time purchases
Checks if a subscription (selling plan) is available
Displays an inline “Upgrade to subscription” option
Lets customers switch with one click
When clicked:
The one-time item is replaced with the subscription
The selling plan is applied automatically
Pricing updates instantly
Checkout continues without interruption
No cart edits. No page reload.
Where It Appears
The upgrade option appears:
Inside the checkout order summary
Directly under the eligible product
As a clean inline link (e.g. Upgrade to subscription – save up to 20%)
Styled to match Shopify’s native checkout
How to Add Checkout Upgrade
Step 1: Open Checkout Editor
Go to Shopify Admin
Navigate to Settings → Checkout
Click Customize checkout
Step 2: Add the Block
Open the Apps section
Find Checkout Upgrade
Click + Add block
Place it in your layout
Click Save
The feature is now active.
How It Works
The upgrade appears only if:
The product was added as a one-time purchase
An active subscription selling plan exists
The plan is available in the customer’s market
The product variant supports selling plans
Each eligible product in checkout can display its own upgrade option.
Settings
Include block in Shop Pay (toggle)
ON → Attempts to show in Shop Pay (subject to Shopify limitations)
OFF → Shows only in standard Shopify checkout
Important Limitations
Checkout Upgrade will not appear if:
The product has no active selling plan
The variant does not support subscriptions
The selling plan is unavailable in the customer’s market
The block is not added in the Checkout Editor
The product is a Membership product ❌
Display in accelerated checkouts (Shop Pay, Apple Pay, Google Pay) may vary based on Shopify restrictions.
FAQ
Does this change my product page?
No. It works only inside checkout.
Can customers undo the upgrade?
Yes. Customers can edit their cart before completing checkout.
Why isn’t the upgrade showing?
Check:
Subscription selling plan is active
Product was added as one-time purchase
Checkout block is saved
Variant supports selling plans
Not a Membership product
If all conditions are met, test with a new checkout session.