Check 6 / 12 LOW impact In the full checklist
Track profit not just revenue: COGS in GA4
What this check is
Revenue without cost of goods tells you what sold, not what made money. Passing the item cost or margin into the analytics lets the reports answer the commercial question.
How to implement it
Add the cost of goods to the product data source or pass it as an item parameter on the purchase event, then build a report that subtracts it from revenue alongside advertising spend. Keep the cost data updated when supplier prices change.
How to verify it
Compare the gross profit the report calculates for a recent period against the same calculation from accounting records: the two should agree within rounding.
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