> For the complete documentation index, see [llms.txt](https://docs.theshoppad.com/infinite-options/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.theshoppad.com/infinite-options/welcome/native-bundling.md).

# Adding an extra cost to your option

Add an extra charge to an Infinite Options value or text field, like engraving or gift wrap, with optional SKU and inventory tracking.

## Increase the Cost of an Option

**Want to charge more when a customer picks an option, like engraving, gift wrap, or rush processing?**

Infinite Options lets you add a price to any option value, or charge per character on a text field. You don't need to create a Shopify product first, but you can attach one if you want an SKU or inventory tracking.

<figure><img src="https://docs.theshoppad.com/infinite-options/assets/Screenshot%202026-07-03%20at%208.09.27%E2%80%AFAM.png" alt=""><figcaption></figcaption></figure>

## 💡 How it works

Use Infinite Options to set a price for an option selection you create by simply adding a price, or add a price to a selection while also attaching a product for SKU or inventory tracking.

:::note
With legacy bundling, Infinite Options automatically adds a hidden add-on product to the cart and Shopify uses that product to apply the additional charge.
:::

## How to Add a Cost to an Option

* [Set it up](https://docs.theshoppad.com/infinite-options/~/revisions/Fn9MVfgGj4OvIppAlWdD/increase-the-cost-of-an-option/native-bundling/)
* [Show the price on your product page](https://docs.theshoppad.com/infinite-options/~/revisions/Fn9MVfgGj4OvIppAlWdD/increase-the-cost-of-an-option/show-price-changes-on-the-product-page/)
* [Track stock and inventory for an add-on](https://docs.theshoppad.com/infinite-options/~/revisions/Fn9MVfgGj4OvIppAlWdD/managing-your-options/track-inventory/)

## Want to Charge for a Text Field?

When creating a text input option, [check the box to add a price](https://docs.theshoppad.com/infinite-options/~/revisions/Fn9MVfgGj4OvIppAlWdD/increase-the-cost-of-an-option/native-bundling/#step-2).

<figure><img src="https://docs.theshoppad.com/infinite-options/assets/image%20%28302%29.png" alt=""><figcaption></figcaption></figure>

## What if I'm using Product Bundling (legacy)?

Product Bundling always needs a Shopify product for each priced option, and that product must stay available on the Online Store sales channel. If it isn't, Shopify shows a "Cannot find variant" error when a customer selects the option.

### How do I know which one I'm using?

In Infinite Options, go to Settings and refer to the Product Bundling section. If the Native Bundling setting is on, you're using add-on pricing. If it's off, you're using Product Bundling (legacy).

## Shopify Discounts

Add-on pricing is calculated after discounts, so the add-on amount gets smaller when the product is on sale.

See [Add-on Pricing and Shopify Discounts](https://docs.theshoppad.com/infinite-options/increase-the-cost-of-an-option/add-on-pricing-and-shopify-discounts/) for a full breakdown.

## Common Questions

<details>

<summary>Do customers see the add-on product?</summary>

No. The product does not need to be on the Online Store sales channel.

Without that sales channel, it remains hidden from your storefront.

</details>

<details>

<summary>Why isn't my price updating on the product page?</summary>

\
That's expected. The price updates in the cart by default. To show it on the product page, add the [Dynamic Bundle Price block](https://docs.theshoppad.com/infinite-options/welcome/native-bundling/#add-the-dynamic-bundle-price-block) to your product template. See [Show price changes on the product page](https://docs.theshoppad.com/infinite-options/~/revisions/qG57U0jJUvpu1ZSKEAp0/increase-the-cost-of-an-option/show-price-changes-on-the-product-page/) for instructions.

</details>

<details>

<summary>How does product weight work?</summary>

The add-on product's weight is included in the order's shipping calculation. If it shouldn't affect shipping, set the weight to zero in Shopify.

</details>

<details>

<summary>Can I track inventory?</summary>

Yes. Refer to our guide for how to [track inventory](https://docs.theshoppad.com/infinite-options/~/revisions/qG57U0jJUvpu1ZSKEAp0/managing-your-options/track-inventory/).

</details>