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Add checkbox upsells (add-ons) to a bundle

Add tick-box add-ons under your offers, each with its own price, and show them on chosen offers.

Updated November 4, 2026

Checkbox upsells are add-ons with a tick box under your offers. A ticked add-on goes in the cart with the bundle, at the price you set. Use them for a case with a phone, or a refill with a starter kit.

These add-ons live inside the bundle. They aren't the Addons Conversion Block, add-on sections from the catalog, or the cart drawer's upsells.

Set up an add-on

  1. In Shopify admin, open Apps → Section Store → Bundles.
  2. Open the bundle.
  3. Scroll to the Checkbox upsells card and turn on its switch.
  4. Optional: type a Block title to show above the add-ons.
  5. Click Add upsell, then Select product. Pick the product and its variants.
  6. Set Price: Full price, Percentage off, Amount off or Fixed price. Fill in Discount per item or Price per item.
  7. Edit Title and Subtitle. The defaults are {{product}} and "Save {{saved_total}}".
  8. Pick the options you want:
    • Selected by default: the box starts ticked.
    • Show product options only when selected: variant pickers stay hidden until the box is ticked.
    • Enable subscription: the add-on joins the subscription when the shopper subscribes and the plan fits.
    • Only when this offer is selected: pick offers under Show for these offers.
  9. Click Add upsell for more, or Customize upsell styling to change the look.
  10. Click Save. On a live bundle, this updates your store at once.

How it works

  • A ticked add-on adds one unit per Add to cart.
  • The discount applies only next to units of this bundle, for at most as many add-on units as bundle units.
  • It applies only to the variants you picked.
  • If the shopper removes the bundle units, the add-on goes back to full price.

If it doesn't work

  • "Finish the checkbox upsell to publish": an add-on has no product or variants, or Only when this offer is selected has no offer. Click Edit checkbox upsell.
  • The add-on doesn't show: the product has no variant to sell, or it's set to show on another offer.

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