# 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.

**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.

## Related

- [Create your first bundle](https://section-store.orka.help/a/create-your-first-bundle)
- [Why can't I publish my bundle?](https://section-store.orka.help/a/why-cant-i-publish-my-bundle)

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