What Is Google Analytics 4's Default Event Data Retention Period?

Google Analytics 4's default event data retention period is 2 months for any newly created property — not the 14 months many marketers assume, which is only the longer of the two selectable options, not the default. This setting controls how far back Explorations (ad hoc analysis) reports can query raw event- and user-level data; it does not affect GA4's standard reports, which stay fully available regardless of how the retention setting is configured.

Where to Check and Change It

The setting lives under Admin, then Data Settings, then Data Retention, inside any GA4 property. Two options are available to standard GA4 properties: 2 months or 14 months. Properties on Google Analytics 360 get more room — 26, 38, or 50 months — reflecting the higher data volumes and longer-term analysis those accounts are typically built for.

What This Setting Actually Limits

The retention window only governs Explorations — GA4's free-form analysis tool for building custom segments, funnels, and path explorations directly against event-level data. Once that window passes, the underlying event and user data used by Explorations ages out and can't be queried anymore. Standard reports, the pre-built dashboards most users check day to day, pull from aggregated data that isn't subject to this same retention limit, which is why a property can still show a year-over-year trend in standard reporting even with the 2-month setting left untouched.

Why the Default Catches People Off Guard

Because the 2-month default only affects a specific report type, it's easy for a team to run a property for months without noticing anything is missing — until someone tries to build a custom exploration querying event-level data from further back than two months and finds the data simply isn't there anymore. By the time that gap is noticed, the earlier data is unrecoverable; retention settings only apply going forward from when they're changed, not retroactively.

What to Do About It

Switching a property from the 2-month default to the maximum 14 months available on standard GA4 costs nothing and takes one click in Data Settings. There's no performance or cost tradeoff to choosing the longer window on a standard property — the only reason 2 months remains the default is that Google set it conservatively at property creation, not because a longer window carries any real downside.

If You Need Data Beyond 14 Months

For a standard (non-360) property, 14 months is the hard ceiling inside GA4 itself — there's no workaround to extend it further within the interface. The way around that limit is exporting raw event data to BigQuery, which isn't subject to the Data Retention setting at all; once an event lands in BigQuery, it stays there indefinitely, governed only by whatever retention policy is set on the BigQuery dataset itself. Businesses that need year-over-year, event-level comparisons beyond 14 months typically set up that export well before they need the historical data, since — like the Data Retention setting — BigQuery only captures data going forward from when the export is turned on.

Bottom Line

Check Admin, Data Settings, Data Retention on every GA4 property you run, and switch it to 14 months now if it's still sitting on the 2-month default — waiting to do this only means losing access to Explorations data for the months that pass before the change is made.

Sources: GA4.com, "Data Retention in Google Analytics (GA4)"; Fathom Analytics, "GA4 Data Retention: All You Need To Know."