Prorate for subscription plan

Shopify Apps
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Topic summary

A developer is experiencing unexpected behavior with Shopify’s subscription plan proration system.

The Issue:

  • User upgraded from a $100 Basic plan to a $150 plan (a $50 difference)
  • According to Shopify’s documentation, proration should be calculated automatically during plan changes
  • Expected to see a prorated charge reflecting the $50 difference
  • Instead, the payment confirmation shows the full $150 amount

Supporting Evidence:

  • Screenshot 1 shows the initial plan approval
  • Screenshot 2 displays the payment confirmation with the full charge

Current Status:
The issue remains unresolved with no responses yet. The user is seeking clarification on why the automatic proration isn’t working as documented.

Summarized with AI on October 31. AI used: claude-sonnet-4-5-20250929.
1

Based on the document that Shopify provides, they are doing the calculation for us when there is a plan changes.

I had a Basic plan 100 and approved the changes(Screenshot 1). Then i did a another one upgrade cost 150, the difference between these two plan is 50 dollar. So i am expecting a prorate with the difference showing in the screenshot 2 of 50 of some sort. But the payment confirmation payment is showing the full amount of 150.

screenshot 1

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1.png1881×792 159 KB

screenshot 2

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2.png1994×1169 249 KB