A Zap stuck in an infinite loop means two or more Zaps are triggering each other in a cycle, rapidly consuming your task quota. The fix is to add a filter step or a flag field that prevents the Zap from re-triggering on its own updates. Zapier will auto-disable Zaps that error 95% of the time within 7 days.
What does "Zap stuck in infinite loop" mean?
When a Zap gets stuck in an infinite loop, it means the Zap's action triggers the same Zap's trigger (or another Zap that triggers the first one), creating an endless cycle. Each cycle counts as a task against your Zapier quota, and a loop can burn through hundreds or thousands of tasks in minutes before you notice.
The most common scenario is a two-Zap loop: Zap A watches for updated rows in a Google Sheet and writes to a CRM. Zap B watches for updated CRM records and writes back to the same Google Sheet. Each update triggers the other, creating an infinite ping-pong. Single-Zap loops also happen when a Zap updates the same record that triggered it.
Zapier does have a safety mechanism — if 95% of a Zap's runs produce errors within 7 days, Zapier automatically disables the Zap. However, loops that technically succeed (each run completes without error) will not be caught by this safeguard, making them especially dangerous for your task budget.
Common causes
Two Zaps trigger each other
Zap A's action triggers Zap B's trigger, and Zap B's action triggers Zap A's trigger
A single Zap updates the same record that
originally triggered it, causing the trigger to fire again
A checkbox or boolean field
used as a trigger fires on both true and false changes, creating a toggle loop
Webhook-based triggers receive data from
the Zap's own action endpoint, creating a self-referencing cycle
A Zap uses an 'Updated
Record' trigger without filtering out updates made by Zapier itself
Multiple Zaps share the same
trigger source and action target without coordination, causing overlapping updates
How to stop a Zap infinite loop
First, immediately turn off the looping Zap from your Zapier dashboard to stop the cycle. Then add a guard mechanism to prevent the loop from recurring. The most reliable approach is to add a dedicated flag field (such as a 'Last Updated By' column) in your data source. Set this field to 'Zapier' whenever the Zap makes an update, and add a Filter step at the beginning of your Zap that only continues when the flag is NOT set to 'Zapier.' This ensures the Zap ignores its own updates.
Alternatively, use Zapier's built-in Filter step to check timestamps — only process records that were not updated within the last 60 seconds. For webhook-based loops, add a unique identifier or token to the payload so the receiving Zap can detect and ignore self-generated events. If your automation logic is complex enough to cause recurring loops, consider consulting RapidDev to design a loop-proof workflow architecture.
Prevention tips
- Always add a Filter step after the trigger to exclude records that were updated by Zapier itself
- Use a dedicated 'source' or 'updated_by' field in your database to track whether a change was made by a human or an automation
- Monitor your Zapier Task History daily during the first week after launching new Zaps to catch loops early
- Set up a Zapier usage alert email so you are notified if task consumption spikes unexpectedly
Still stuck?
Copy one of these prompts to get a personalized, step-by-step explanation.
My Zapier Zap is stuck in an infinite loop — it keeps triggering itself. How do I add a filter or flag field to prevent the Zap from processing its own updates?
Add a Filter step to my Zap that checks a 'last_updated_by' field and only continues if the value is not 'zapier'. Show me the filter configuration.
Frequently asked questions
How do I know if my Zap is stuck in an infinite loop?
Check your Zapier Task History. If you see hundreds or thousands of runs for the same Zap within minutes, all processing the same or similar data, you have a loop. Your task usage graph will also show a sudden spike.
Will Zapier automatically stop a "Zap stuck in infinite loop"?
Zapier auto-disables Zaps that error 95% of the time within 7 days, but successful loops (where each run technically completes) will not be caught. You must add your own loop-prevention logic.
Can an infinite loop use up my entire Zapier task quota?
Yes. A fast loop can consume thousands of tasks in minutes. Each cycle counts as a separate task regardless of whether it does useful work. Monitor your usage and turn off the Zap immediately if you suspect a loop.
What is the best way to prevent Zap loops with Google Sheets?
Add a column called 'Updated By' to your sheet. In your Zap, set this column to 'Zapier' when updating. Add a Filter step at the start that only continues if 'Updated By' does not equal 'Zapier.' Clear the field after human edits.
How do I get a refund for tasks consumed by a Zap loop?
Zapier does not automatically refund loop-consumed tasks, but you can contact Zapier Support with your Task History showing the loop. They may offer a one-time credit depending on the circumstances.
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