Percentage

The Percentage mode charges a share of the main product’s price. A 15% protection plan adds $6.30 to a $42.00 wallet and $18.00 to a $120.00 bag. You enter one number, and the charge follows whichever product and variant the customer picks.

Like Fixed amount, it raises the price of the main product. No Shopify product is created or linked.

Use it for charges that should grow with the price of the item, such as protection plans, insurance, rush production, or a premium finish.

Percentage add-ons may not be available on all plans. The in-app Pricing page lists them as Percentage add-ons. See Compare plans.

Steps

1. Open the price field

   On an input type, that is Price in the Add-on card on the Basic tab. On a selection type, it is the Price cell on the option value’s row. See Where you can set add-ons.

2. Choose the Percentage tab

   The Add-on Configuration dialog has four tabs. Percentage is the fourth.

   Two notes appear at the top. The first confirms that the add-on is a percentage of the main product’s current selling price. The second warns that this add-on type is not supported on the POS channel.

3. Enter the percentage

   Type the number without the % sign, for example 15. Decimals are accepted.

   The percentage must be greater than 0, or the dialog shows Enter a percentage greater than 0. and Select stays disabled. Above 100, the dialog warns This add-on costs more than the product itself. You can still save it. The warning is there to catch a typo such as 150 instead of 15.

4. Optionally, limit the add-on amount

   Select Limit the add-on amount to keep the charge between a floor and a ceiling. Most stores do not need this. Two fields appear, both in your store’s currency:

   Field	What it does
   Minimum amount	The add-on never costs less than this. Leave it empty for no minimum
   Maximum amount	The add-on never costs more than this. Leave it empty for no maximum

   With a minimum set, a line below the fields tells you where it takes over, for example On products under $33.33, the add-on is $5.00 instead of 15%.

   The minimum cannot be higher than the maximum. If it is, the dialog shows Minimum must be less than or equal to maximum.

   

   The Percentage tab, with a 15% add-on kept between $5.00 and $50.00.

5. Select Select

   The dialog closes. The price field shows the percentage, such as 15%, with no currency sign. If you set a minimum or maximum, they are shown below the field, for example Min $5.00 · Max $50.00.

   

   After you select it, the Price field shows the percentage and its limits.

6. Set how it scales

   In the Add-on card, the Quantity field sets how many times the charge is applied. Three modes cannot be used with Percentage, the same three as with Fixed amount. See What it cannot do below and Advanced add-on modes.

7. Save and test on your storefront

   Open a product the option set is assigned to and select the option. The amount beside it is the percentage of that product’s price. The charge is applied at checkout. See How pricing is applied.

How the amount is worked out

The percentage is taken from the main product’s current selling price: the price of the variant the customer has selected, for one item.

• It follows the variant. When the customer switches to a variant with a different price, the add-on amount beside the option changes with it.
• Other add-ons are not included. A 15% protection plan on a $42.00 wallet is $6.30, even if the customer also adds $3.00 gift wrapping.
• The minimum and maximum come last. The app works out the percentage, then raises it to the minimum or lowers it to the maximum.
• Amounts are rounded to the nearest cent.
• Other currencies. When a customer shops in another currency, the percentage is taken from the price they see. The minimum and maximum are set in your store’s currency and converted.

With 15%, a $5.00 minimum, and a $50.00 maximum:

Variant price	15% of it	Charged
$20.00	$3.00	$5.00, the minimum
$42.00	$6.30	$6.30
$400.00	$60.00	$50.00, the maximum

What the customer sees

The option shows the add-on as an amount of money, such as (+ $6.30), not as a percentage. The format comes from your store-wide settings. Depending on those settings, the product price on the page also updates to include it. See Add-on price display settings.

A 15% protection plan on a $42.00 wallet shows as + $6.30, and the product price updates to $48.30.

There is no separate cart line. The charge is added to the main item’s price, so the cart shows one line at the higher amount, with the option details listed below it.

What it cannot do

Three quantity modes are unavailable with Percentage, the same three as with Fixed amount:

• One time charge
• Fixed quantity
• Fixed quantity (by customer)

In the Add-on quantity dialog, those three are greyed out with the note Not available with Fixed amount. The note names Fixed amount, but it applies to Percentage too. If one of them is already set when you open the Percentage tab, a warning tells you to change the add-on quantity first, and Select stays disabled.

To charge something once per order, use New product with One time charge instead.

No Shopify POS support. Percentage add-ons do not work in the Shopify POS app. If an option set is published to the POS channel, use one of the product-backed modes instead. See POS limitations.

No inventory, and no out-of-stock handling. There is no product to track, so the Out of stock options setting has no effect.

A percentage cannot be negative, even on stores that allow negative add-on prices. Like Fixed amount, this mode has no SKU, no weight, and no separate line in your Shopify product reports.

Not for Character range prices. The price dialog of each range in a Character range table does not offer Percentage. A range that was already saved with a percentage is flagged with Percentage isn’t available for character ranges. Choose another add-on type. Price it with Fixed amount, New product, or Existing product.

Percentage or Fixed amount?

The charge should…	Use
Grow with the price of the item, such as a warranty or insurance	Percentage
Be the same on every product, such as a $5.00 engraving fee	Fixed amount
Grow with the price, but never be tiny or huge	Percentage with Limit the add-on amount
Track stock, ship as its own item, or work in POS	New product or Existing product

Examples

A protection plan with a floor and a ceiling

Setting	Value
Option	Add 2-year protection plan, a Switch
Price	Percentage 15%, minimum $5.00, maximum $50.00
Add-on quantity	Default, one plan per item

Two plan lengths

A Radio button with 1 year at 8% and 2 years at 15%, both using Percentage. Each value has its own percentage.

Rush production

A Switch labeled Rush production at 20%, so a rush order on a large print costs more than on a small one.

Notes

• The same option set can mix modes. One value can use Percentage while another uses Existing product.
• A percentage attached to a default value is charged as soon as the page loads. See Required field and default value.
• A hidden option is not charged. Hiding an option with a conditional rule removes its charge from the total.
• On a multi-select option, every selected value with a percentage is charged, each worked out from the main product’s price.

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