Why Conversion Tracking Is Inaccurate: Common Causes
When conversion numbers disagree, the cause is rarely one universal “tracking bug.” Differences can come from event setup, attribution rules, identity, devices, browsers, timing, consent, or platform modeling.
Event definitions differ
One system may count a purchase when payment completes, while another records a button click or thank-you-page load.
Attribution windows differ
Platforms can look back over different periods when assigning credit, changing which conversions are attached to a campaign.
Identity breaks across devices
A person may click on one device and buy on another, leaving systems with different ability to connect the journey.
Browser and privacy restrictions matter
Ad blockers, cookie restrictions, consent choices, and browser behavior can limit what client-side systems observe.
Duplicate or missing events happen
Poor implementation can fire an event twice, fail to fire at all, or send inconsistent identifiers.
Reconcile definitions before totals
Before assuming one platform is wrong, confirm that both systems are measuring the same event, time range, timezone, attribution window, and status.