How to prevent inventory drift between Shopify and your back-office
If your Shopify store and your operations tool ever show different stock numbers, you have inventory drift. It causes oversells, cancelled orders and unhappy customers — and it's almost always a sync problem.
Why drift happens
Drift creeps in when stock changes in one system (a POS sale, a return, a transfer) and the other system finds out late — or never.
One-way syncs and periodic batch jobs are the usual culprits: the gap between updates is the window where the two truths diverge.
The fix: two-way sync with reconciliation
A real-time, two-way sync keeps both systems updated as events happen, not on a timer.
A daily reconciliation pass then compares both sides and flags any variance, so drift is caught and corrected instead of compounding.
Or remove the second system entirely
The surest way to eliminate drift is to have one source of truth. When your POS, online orders and inventory live in one database, there's nothing to drift against.