Why is GA4 showing less revenue than my sales channel?

Topic summary

A user is experiencing a significant discrepancy between revenue tracking in Google Analytics 4 (GA4) and Shopify, with GA4 showing less than half the revenue reported by Shopify.

Key Issue:

  • GA4 revenue data is substantially lower than Shopify’s sales channel data
  • The user is utilizing the Google & YouTube sales channel/app

Question:

  • Should Shopify be sending accurate sales data (including refunds, etc.) through the sales channel/app to GA4?

The discussion appears to be seeking clarification on whether this is a configuration issue or expected behavior, with no responses or resolution provided yet.

Summarized with AI on November 15. AI used: claude-sonnet-4-5-20250929.

GA4 is recording less than half the revenue that shopify is showing.

Shouldn’t shopify be sending the correct sales, refunds etc through the app/sales channel?

I am using the Google & YouTube app/sales channel.