How to Add "Notify Me When Back in Stock"

How to Add “Notify Me When Back in Stock” on Shopify

Sold-out products don’t have to mean lost sales. By letting customers sign up for back-in-stock alerts, you can turn product scarcity into retention and list growth — especially for limited collections, seasonal drops, or fast-moving inventory.

In this post, we’ll walk you through:

• How to set up a simple “Notify Me” system using Shopify + Klaviyo (no third-party apps required)
• What we built for Grover Rad, a fashion brand with an editorial feel
• When it makes sense to use an app instead

Why Back-in-Stock Alerts Matter

Done right, “Notify Me” buttons do more than inform — they:

• Capture demand while your product is out of stock
• Grow your email list with high-intent contacts
• Give you real data for inventory planning
• Build hype around product returns or relaunches

They’re easy to implement, lightweight, and can be styled to fit your brand.

Step-by-Step: Set Up “Notify Me” on Shopify with Klaviyo

Step 1: Add Conditional Display Logic in Your Theme

You'll need to show the form only when a product is sold out.

In your product.liquid or main-product.liquid, add:

{% raw %}{% if product.available == false %}
  <!-- Embed your Klaviyo form or custom HTML form here -->
{% endif %}{% endraw %}

This ensures the form only shows up when no variants are in stock.

Note: If you're using Online Store 2.0 with section-based themes, use the same conditional inside a product-template.liquid block.

Step 2: Set Up a Klaviyo Form with Product Info

Create a Klaviyo embedded form that:

• Collects the user’s email
• Passes the product name or variant ID as a hidden field

Use Klaviyo’s hidden inputs and JavaScript to dynamically populate values:

<input type="hidden" name="Product" value="{{ product.title }}">

Step 3: Build a Back-in-Stock Flow in Klaviyo

Once someone submits the form:

• Add them to a dedicated list or segment
• Set up an automated flow that triggers when you restock the product

Tips:

1. Use product-based conditional splits if multiple items feed the same form
2. Include the product image and link in the email for high conversion

When to Use an App Instead

If your team needs more automation or analytics, consider Shopify apps like:

• Back in Stock
• Swym
• Restock Rocket

Use an app if you want:

1. Push / SMS notifications
2. Admin-side dashboards
3. Inventory-based automatic triggers
4. Multi-location stock logic

Final Thoughts

For small to mid-sized stores, you can build an elegant back-in-stock flow using just Shopify + Klaviyo. No monthly app fees. No branding mismatch.

For design-forward brands like Grover Rad, this flexibility lets you stay in control — while turning sold-out moments into future revenue.

If you're not sure how to style or wire it all together, or want a hands-off solution that fits your brand — we can help. This is one of the simplest, highest-ROI features you can add to your Shopify store.