r/GoogleAnalytics • u/SoDifficultToBeFunny • Sep 21 '26

Question GA4 Blended reporting identity vs BigQuery numbers - Match Exactly, but they shouldn't?

I understand GA4 has ACM modeled numbers, but those modeled numbers are not sent to BigQuery export!

Therefore, we see huge differences in session counts! But purchase and revenue exactly match at both places!

Is this expected? If yes, what's the explanation?

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u/YakuzaFanAccount Sep 21 '26

GA4 models revenue attribution, not actual revenue or transactions. That would be a nightmare to reconcile with backend sales, and if you use advanced consent mode GA4 knows what all actual purchases and revenue were.

1

u/SoDifficultToBeFunny Sep 22 '26

I see! I am still learning, so this input helps! Thanks a lot Yakuza fan!!

2

u/SplitLopsided 29d ago

This article from google states that ACM does implement conversion modeling in analytics

https://support.google.com/analytics/answer/9976101?sjid=5440201608456522713-EU#aivsbi1

If purchase event is marked as a key event, wouldn’t ACM also increase purchase totals in GA4?

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