This article is about Google Analytics 4 properties. Refer to the Universal Analytics section if you're still using a Universal Analytics property, which will stop processing data on July 1, 2023 (July 1, 2024 for Analytics 360 properties).

[GA4] Event collection limits

These limits apply on a per-property basis. You can increase certain limits (but not event/parameter character limits) by upgrading your property to Google Analytics 360. 

Collection limits

Google Analytics doesn't log events, event parameters, and user properties that exceed the following limits. For example, Analytics doesn't process the 26th user property nor does it process an event name with more than 40 characters.

For detailed information about the error events that Analytics logs when you exceed the following collection limits, see Analytics Error Codes.

Logged item Limit (For 360 limits, go here) Can I delete items if I'm close to the limit?
Distinctly named events

500 per app instance (for app data streams)

There is no limit on the number of distinctly named events for web data streams.

Automatically collected events and enhanced measurement events don't count toward the limits.

No
Length of event name 40 characters. If an event exceeds 40 characters, the event will not be reported as a conversion (if you mark the event as a conversion) because the appended "_c" will be missing.  N/A
Event parameters per event 25 event parameters Yes
Length of event-parameter name 40 characters N/A
Length of event-parameter value 100 characters N/A
User properties 25 per property  No
Length of user-property names 24 characters N/A
Length of user-property values 36 characters N/A
Length of User-ID values 256 characters N/A
Events per User per day (for app data streams) 500 N/A

Character limits

The character limits are the same for single-width character languages (e.g., English) and double-width character languages (e.g., Japanese).

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