Add a Single Product Upsell at Checkout

Use this 15-Minute Personalization to increase average order value with a complementary product at checkout.

Only available to Shopify Plus customers

Why Launch This Personalization | VIDEO: How to Set This Up | Step-by-Step Guide

What's a Checkout Product Upsell

This personalization adds a single complementary product upsell at checkout that customers can add with one click before completing their purchase. It runs continuously without day-to-day management and shows to all visitors or a targeted audience.

Examples:

• Brands with impulse add-on products that are complementary, one-size / color, and don't take any decision making to add

• Brands that know exactly which product they want to show, or have already tested and want to rollout their learnings

Why This Works

Checkout is the highest-intent moment in the purchase journey. A single-product upsell allows you to increase average order value while keeping checkout fast and focused. Too many choices can reduce conversion, but one obvious complementary product feels like a natural addition rather than a distraction.

Choose products that are one size, one color, and require minimal decision making. This should feel like a no-brainer add-on.

How to Build This Personalization in Intelligems

Step 1: Choose Your Upsell Product

Select a product that is:

• Complementary to items already in cart

• One size or color (no variants to choose)

• Low-cost impulse add-on

• Obvious addition that requires minimal decision making

Step 2: Create the Checkout Personalization

1. Go to Personalizations → Checkout

2. Select Upsell

3. Choose the Single Product template

4. Add a Block name (e.g., "Checkout Upsell - Travel Size")

5. Rename the Location ID to be descriptive (e.g., "checkout_upsell_travelsize")

6. Select your product from the dropdown

Step 3: Configure Block Settings

1. Set your headline copy (e.g., "Don't forget to add...")

2. Set your button copy (e.g., "Add")

3. Configure design settings:

   • Background color

   • Padding

   • Border style

   • Border thickness

   • Corner radius

4. Click Next

Step 4: Add Block to Shopify Checkout

1. Click Complete Shopify setup (or follow these steps manually)

2. In the Shopify Admin go to Settings → Checkout

3. Under Configurations, click Customize to open the Checkout editor

4. In the left panel, click Apps

5. Navigate to Intelligems, click (+)

6. Paste your block Location ID into the block settings

7. Toggle on Include block in Shop Pay (recommended)

8. Drag the block into the desired position at checkout

Locations vary by desktop and mobile. Make sure to preview the location on both devices. If you do not like where the location shows on both mobile and desktop, set up separate personalizations - one for mobile and one for desktop.

1. Click Save in the top right in the Checkout editor

2. Return to Intelligems and click Save

Don't worry, the block will not appear in Checkout until you activate the Personalization in Intelligems.

Step 5: Add Targeting (Optional)

1. In the Targeting tab, targeting is set to all visitors by default recommended

2. Click Save

Step 6: Preview and Activate

1. Preview your Checkout Personalization on desktop and mobile

2. Test adding the upsell product to your order

3. When everything looks good, click Activate

Step 7: Let it run

This Personalization will run continuously in the background. The upsell product will appear at checkout for your targeted audience, increasing average order value automatically.

What to test upsell products first to see which product performs best? Create a Product Upsell Test.

Want Help With Setup?

Our team can walk you through this personalization and launch it while we're on the call. Book a strategy call