Tips & TricksMay 9, 20261 min read

How to Create a Back in Stock Function with Klaviyo on Shopify

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Written byPhú Trịnh
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How to Create a Back in Stock Function with Klaviyo on Shopify
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When customers see an “Out of Stock” message, it can mean a lost sale. But with Klaviyo’s Back in Stock feature, you can turn that moment into an opportunity—letting shoppers subscribe for notifications and automatically emailing them once the product is restocked. Here’s a step-by-step guide to setting it up in Shopify.

Why Use Back in Stock Alerts?

  • Recover sales – Customers who sign up are already interested.
  • Improve customer experience – Shoppers don’t need to constantly check back.
  • Collect intent data – Each signup shows demand for specific products.
  • Guide inventory decisions – Identify your most requested items.

    • - Step 1: Install Klaviyo on Your Shopify Store

  • In Shopify admin, go to Apps > Shopify App Store.
  • Search for Klaviyo: Email Marketing & SMS and install it.
  • Connect your Shopify store to your Klaviyo account

    • Once connected, Shopify will sync your product catalog and customer data with Klaviyo.

    - Step 2: Enable Back in Stock in Klaviyo

  • Log into Klaviyo Dashboard.
  • Navigate to Signup Forms > Back in Stock (create a new form for the first using)
  • Choose Enable Back in Stock and link it to your Shopify store.
  • Klaviyo will automatically generate a Back in Stock signup form that attaches to out-of-stock product pages.

    • - Step 3: Customize the Signup Form

  • Button text – e.g., “Notify Me When Available” instead of “Out of Stock.”
  • Fields – usually just email, but you can add SMS if you want text alerts.
  • Styling – match your theme’s fonts, colors, and button styles.

    • In Shopify, preview the product page and ensure the “Notify Me” button appears when inventory is 0.

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