---
title: "Stockout meaning: what is a stockout? | Product Metrics"
description: "A stockout is when a product has no units left to sell. See what it means, what causes it and why advertising a product that is out of stock wastes spend."
canonical: "https://www.productmetrics.io/glossary/stockout"
pageType: article
language: en
publisher: "Product Metrics"
author: "Berend Vrakking"
datePublished: 2026-10-07
dateModified: 2026-10-07
---

> Content index: https://www.productmetrics.io/llms.txt

# Stockout

A stockout is when a product has no units left to ship, so a shopper who wants it cannot buy it.

## Example

Worked example, ads keep running for three days:

| Day | Stock at start | Ad clicks | Ad spend | Orders |
| --- | --- | --- | --- | --- |
| Day 1 | 5 | 100 clicks | €50.00 | 5 |
| Day 2 | 0 | 100 clicks | €50.00 | 0 |
| Day 3 | 0 | 100 clicks | €50.00 | 0 |

Trail Runner 2 sells out on day 1. If its ads keep running at €0.50 a click, days 2 and 3 cost €100.00 for clicks that cannot become orders. Illustrative data.

## For one product, and for an account

A stockout happens to one product at a time, but an account-level view rarely shows it. Total stock looks healthy while your best seller has run out, and its ads keep spending until someone notices.

Inventory Insights in Product Metrics works back from each product’s lead time, safety buffer and projected demand to a reorder date, so you can act before the stock reaches zero. If a product runs out anyway, its stock label in Merchant Center, which you approve, drops to paused and returns when the restock lands. Campaign settings stay yours.

## Common mistake

Looking at total stock instead of stock per product. A full warehouse does not help the one product that has run out.

## Questions

### What is another word for stockout?

Out of stock. You will also see it written stock-out or stock out; the spelling changes, the empty shelf does not.

### What causes a stockout?

Usually demand higher than expected, a supplier that delivers later than planned, a reorder placed too late, or a stock count that does not match the shelf. A buffer of safety stock and a reorder date worked back from lead time reduce the risk.

### Should I keep advertising a product that is out of stock?

Usually not. Clicks on a product you cannot ship cost money and cannot become orders. Lower its priority or pause it until the restock lands, then return it.

## Keep reading

- [Inventory Insights](https://www.productmetrics.io/inventory-insights): See reorder dates and stop paying for clicks on stock you cannot deliver.
- [Days of inventory](https://www.productmetrics.io/glossary/days-of-inventory): How long your stock lasts before a stockout.
- [Safety stock](https://www.productmetrics.io/glossary/safety-stock): The buffer that protects against a stockout.
- [Lead time](https://www.productmetrics.io/glossary/lead-time): How long a restock takes, which sets when you must reorder.
- [Custom labels](https://www.productmetrics.io/glossary/custom-labels): How a stock change reaches your Google Shopping campaigns.
- [Dead stock inventory: how to find it and clear it](https://www.productmetrics.io/blog/dead-stock-inventory): The other side of stock: products that have stopped selling.

---

Written by Berend Vrakking, founder of Product Metrics. Last updated 2026-10-07.

HTML version: https://www.productmetrics.io/glossary/stockout