How to Use the Additional Price Feature?

The Additional price feature lets you charge an extra fee when a customer selects a specific cart field option. It is useful for services such as gift wrapping, rush processing, custom packaging, insurance, installation, or any option that should increase the order total.

Requirements

Additional price is available on the Flagship plan only. The feature is designed for option-based fields, such as dropdown, radio button, and checkbox fields. Your store also needs to have the Cart Field storefront script/theme extension working correctly so the selected extra fee can be added before checkout.

How to set it up

1. Open the Cart Field app in your Shopify admin.

2. Edit the cart field you want to configure.

3. Go to the Options tab.

4. Click Add option, or edit an existing option.

5. Enter the option name, such as "Gift wrapping".

6. Enable Additional price.

7. Enter the Additional price amount, such as 5.

8. Click Save.

What customers will see

When a customer selects an option with an additional price and continues to checkout, the app adds the corresponding extra fee item to the cart. The order total will increase by that amount.

For example, if you create a "Gift wrapping" option with an additional price of $5, customers who select that option will have a $5 extra fee added to their cart before checkout.

If the customer selects multiple checkbox options that each have an additional price, each selected extra fee will be added.

Important notes

Additional price does not change the price of your original products. It adds a separate extra fee item to the cart.

The amount must be greater than 0. Negative amounts, discounts, or price reductions are not supported.

If you cannot enable Additional price, please make sure your store is on the Flagship plan.

If saving the option fails because of permission issues, the app may need permission to create or update Shopify product variants. Please re-authorize the app or contact support for help.