Overselling — taking an order for stock you don't actually have — looks free at checkout and expensive everywhere after it: a refund, a "sorry, we oversold" email, the Stripe fee you never get back, and a customer who may never return. Plug in your own numbers and estimate what a month of oversold orders really costs you.
| Where an oversell leaks money (your inputs) | Per month |
|---|---|
| Lost gross profit on cancellations Cancelled orders × AOV × margin | $0 |
| Stripe fees eaten on refunds Cancelled orders × (2.9% of AOV + $0.30) — US standard: the processing fee is not returned when you refund | $0 |
| Support & resolution labor Every oversold order × support cost | $0 |
| Lost future value of churned customers Oversold orders × churn % × repeat-customer value | $0 |
| Your estimated monthly cost of overselling | $0 |
Overselling almost never comes from carelessness. It comes from lag: your Shopify inventory, your 3PL or warehouse counts, and your channels (POS, Amazon, wholesale) drift out of sync, so the store keeps selling a unit that's already gone. A single sync that quietly stopped overnight can let a launch sell hundreds of orders you can't fulfill — and you find out from the refunds, not an alert.
Ops Monitor connects to your Shopify and Stripe with read-only API keys and continuously watches for the inventory drift and stalled syncs that cause overselling — then alerts you by email or Slack the moment counts start diverging, before they turn into a sale you can't ship.
It is read-only: it never writes to your store and never moves money. It detects and alerts — it does not block a checkout or guarantee you'll never oversell. But catching one stalled sync before a launch often saves a brand more than a year of the $149/month price. If you'd rather have a person look once, a $29 one-time Ops Audit reviews your setup and flags where overselling is most likely to happen.
Start monitoring in minutes with read-only keys — $149/month, self-serve, cancel anytime.
Start monitoring — $149/mo →Not ready? Run the free, no-signup Ops Scorecard to see where your store is most exposed — or grab the $29 one-time Ops Audit.