What is a checkout upsell on Shopify and how do you add one?

What the customer sees

• An offer block inside checkout, in the order summary by default, with the product, its price and an add button.
• When the offer has a discount, the discounted price is shown and the discount is applied automatically.
• One click adds the product to the order; the customer then pays for everything at once.
• Optional variant and quantity selectors (up to 10 items).

Checkout upsell vs post-purchase upsell

Because the offer appears before payment, keep it relevant and simple so it doesn’t get in the way of completing the order. You can use both: a small add-on in checkout, a bigger offer after payment.

What you can set up with Sellify

• Up to 10 products per offer, picked by you or taken from Shopify’s related or complementary recommendations for the cart.
• A discount per product: none, a percentage or a fixed amount.
• Targeting by products, collections, excluded products and cart total.
• Vertical or horizontal layout when the offer has several products.
• A/B tests between offer variants, with stats per variant.
• Translations for your store’s languages.
• Impressions, add-to-cart clicks, conversions and revenue per offer.

Products already in the cart and products sold only as subscriptions are not offered.

How to add a checkout upsell

1. In Sellify, create a checkout offer, set its products, discount and triggers, then activate it.
2. In your Shopify admin, go to Settings › Checkout and open the checkout editor.
3. Click Add block, choose Sellify - Checkout Upsell and save.

Plan details and limits: Is Sellify compatible with Shopify Checkout Extensibility? Not on Shopify Plus? Start with a post-purchase upsell.