Yes, you can import historical Reddit Ads data into Google Analytics, but there are a few important limitations and requirements to understand before you start.
1. It’s Not Automatic, You Need Manual or Third-Party Import
Google Analytics doesn’t have a native Reddit Ads integration. If you want historical spend, impressions, or clicks from Reddit in GA, you’ll have to:
Export historical data from Reddit Ads Manager (choose the correct date range)
Match your campaign names with the UTMs you used in the past
Upload it manually into GA (via Data Import) or use a tool like Supermetrics, Funnel.io, or Windsor.ai to push it in bulk.
2. Only Certain Data Can Be Backfilled
You can import cost, clicks, impressions for old campaigns
You cannot backfill traffic sessions or conversions if GA didn’t track them at the time — those are only recorded when users actually visited your site and the GA tag fired.
GA will merge your historical cost data with existing traffic/conversion data for matching campaigns.
3. Matching Historical Data to GA Requires Exact Naming
The campaign name in your Reddit Ads export must exactly match the utm_campaign parameter from your historical links.
If your past Reddit campaigns didn’t have consistent UTMs, your import will fail or misattribute data.
4. You Can Backfill Multiple Years, But with Caveats
GA4 will accept historical cost data as far back as your property’s start date.
Imported historical data won’t “rewrite” old reports—it will just add cost metrics for matching campaigns.
For Universal Analytics (if you’re still using it), the same applies, but UA is sunset for standard properties—so GA4 is the better route.
5. Practical Steps for Historical Import
Export your Reddit Ads data for the desired date range.
Make sure the campaign names match your historical UTMs.
Format your CSV with the required GA columns (Date, Campaign, Source, Medium, Clicks, Impressions, Cost).
In GA4: Admin → Data Import → Cost Data → Upload CSV.
Wait for GA to process and recheck your reports.
You can pull historical Reddit Ads cost data into Google Analytics, but only if you had UTMs set up properly back then, and only cost/impression/click metrics will be added. No tracking tag = no backfilled visits or conversions.