Google Ads Offline Conversions Not Importing: Common Causes and Troubleshooting Steps
When offline conversions do not import into Google Ads, the break is in the data you send, the format you send it in or the conversion action you send it to. The GCLID or identifier, the conversion time and the conversion action all have to be correct. Find which one is wrong before resubmitting.
Table of Contents
- 01.Offline imports need three things
- 02.What to check first
- 03.GCLID and identifiers
- 04.Conversion action
- 05.Conversion time and the import window
- 06.Upload format and data formatting
- 07.Duplicate uploads
- 08.Matching
- 09.How to diagnose it
Offline imports need three things
An offline conversion import needs a valid identifier, a conversion time and a target conversion action. If any of these is missing, wrong or mismatched, the import fails silently. Google does not always tell you why a row did not import, so you have to check each piece yourself.
What to check first
- Confirm the GCLID or supported identifier is present and valid.
- Confirm the conversion action exists and accepts offline imports.
- Confirm the conversion time is within the import window.
- Confirm the upload format and field names are correct.
- Check the upload results for rejected rows.
GCLID and identifiers
The GCLID is the most common identifier for offline imports. If it is missing, empty or malformed, the row cannot be matched to a click. Some imports also accept other identifiers depending on the setup. Confirm you are sending the identifier your conversion action expects and that it was actually captured on the lead.
Conversion action
The conversion action has to exist and be configured to accept the import source. If you upload to a conversion action that is not set up for offline data, or that is paused, the rows are rejected. Check the conversion action name and ID in your upload and confirm it matches an active action.
Conversion time and the import window
The conversion time has to fall within the allowed window for the conversion action. If you upload a conversion that happened too long ago, or with a timestamp in the future, the row is rejected. Check the timestamp format and confirm the conversion time is within the action's window.
Upload format and data formatting
The upload has to match the expected format. Column names, date formats and value types all have to be correct. A wrong column name or a date in the wrong format causes the whole row to fail. Validate your file against the required schema before uploading.
Duplicate uploads
If you upload the same conversion twice, the second upload may be rejected or may create a duplicate depending on the setup. Use a consistent identifier or transaction ID so the system can deduplicate. Track what you have already uploaded to avoid resending the same rows.
Matching
Even with a valid GCLID, the import only works if the click can be matched. If the GCLID belongs to a different account, or the click is too old, or the user cannot be matched, the row does not import. A valid format does not guarantee a match. Check the upload results to see how many rows matched.
How to diagnose it
- 1.Confirm the GCLID or identifier is present and valid.
- 2.Confirm the conversion action is active and accepts imports.
- 3.Check the conversion time is within the window.
- 4.Validate the upload format against the schema.
- 5.Review the upload results for rejected or unmatched rows.
Frequently Asked Questions
Why are my Google Ads offline conversions not importing?
The GCLID may be missing or invalid, the conversion action may not accept imports, the conversion time may be outside the window or the upload format may be wrong. Check each piece and review the upload results.
How long do I have to upload an offline conversion?
The conversion time has to fall within the conversion action's import window. Uploads outside the window are rejected. Check the action's configuration and the timestamp on your data.
Need help applying this to your business?
PPC, Conversion Tracking, CRM and Automation Specialist. Helping businesses generate qualified leads with Google Ads, accurate tracking and automated follow-up.
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