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Some choices cost you more to make. Gift wrapping, a second name, an upgrade to a bigger frame. The Add-on price column lets you charge for those, value by value.
The Add-on price in USD column highlighted in a swatch values table, with a price field reading dollar 0.00 on each of the four value rows.

Every value has its own add-on price. Leave it at zero and the choice is free.

Setting a price

Type the extra amount into the Add-on price (USD) field on the row. Leave it at 0.00 and the choice costs nothing extra, which is how every value starts.
Add-on prices come with the Studio and Atelier plans. On a plan without them the price field is locked, and hovering it tells you which plan you need.
The amount is what gets added on top of your product price, not the new total. If your mug is $20 and you put `5` on the "Add a photo" value, the customer pays $25.

Prices are entered in US dollars

Whatever currency your store sells in, you type add-on prices here in USD. They are converted into each store’s currency when you publish, and the converted amount is what the customer pays.
Because the conversion happens at publish, a price you set today is converted at that point rather than moving with the exchange rate afterwards. If rates shift a long way, republish to refresh them.

A priced choice cannot be pre-selected

If a value carries an extra charge, it cannot be set as the option’s default. The Choose default list will not let you pick it. This is on purpose, and it is worth understanding rather than working around. A customer who lands on your product page and sees a price should be able to trust that it is the price of what is currently selected. Starting them on a paid upgrade they did not choose is how you end up with abandoned carts and chargebacks.
If you want the premium version to be the obvious choice, make it free and raise your product price, then offer a cheaper stripped-back value instead. The customer still lands on the option you want, and nothing is hidden.

Where the charge shows up

You do not set anything up for this. Customei looks at your Shopify store and picks the way your store is allowed to charge extra. There are three, and you do not choose between them. In every case the customer pays the right total. On grouped orders, the customer’s answers and print file links sit on the Part of group, not on the product line under it. If a print partner or fulfilment app reads your orders, check that it reads the group too. If your store moves to or from Shopify Plus, Customei switches to the matching way as soon as your plan changes. You do not need to do anything.
Shopify lets only one app group a cart line. If a personalized product is bought on a subscription, or another app on your store also groups items, the extra on that order cannot be charged. Customei then moves your store to the separate Customei Customization Options line, usually within a minute, so later orders are charged correctly.
On stores that show the Customei Customization Options line, that line is how the extra gets paid. If a customer removes it from the cart, it is added back, and they cannot check out without it.You may also see a product called Customei Customization Options in your Shopify products list. Customei made it to carry these charges. Do not delete, archive, or edit it.
Changing an add-on price only affects new orders. Anything already sitting in a customer’s cart keeps the price it had when it was added.

Pricing that does not cause support tickets

  • Charge for real costs. Surcharges that map onto something the customer can see, like an extra photo or a bigger size, are accepted without complaint. Arbitrary ones are not.
  • Say what it is in the label. “Gift box (+$5)” in the label leaves no room for surprise, even though the price is applied automatically.
  • Keep the number of paid options small. Three surcharges on one product turns a simple purchase into a pricing puzzle.

Where to next

Manage your values

Reorder, rename, and set a default.

Bulk edit values

Set many prices at once.

Show or hide options

Only show a paid upgrade when it is relevant.

Assign products and go live

Publish so the new prices reach your storefront.