Pricing & Upsell
One-time Charge (Add-on Fee)
3 min read Updated Jul 24, 2026
Overview#
The One-time Charge feature allows you to apply a flat additional fee to an option value without multiplying that charge by the main product quantity.
With the latest update, One-time Charge now works seamlessly alongside Quantity for Option Value, giving you complete flexibility to charge per add-on item while keeping it independent of the main product's purchase quantity.
How It Works#
By default, any extra charge assigned to an option value multiplies by the quantity of the main product selected in the cart. Enabling One-time Charge overrides this behavior.
| Feature / Setting | Add Charge Calculation Formula | Example Scenario ($10 Add Charge, Main Product Qty: 5) |
|---|---|---|
| Standard Add Charge | Add Charge Amount × Option Value Qty × Main Product Qty |
$10 × 1 × 5 = $50 |
| One-time Charge (Single Selection) | Add Charge Amount × 1 (Flat Fee) |
$10 × 1 = $10 (independent of main product qty) |
| One-time Charge + Quantity for Option Value | Add Charge Amount × Option Value Qty |
If customer selects 3 add-on units: $10 × 3 = $30 (independent of main product qty) |
Key Benefits of One-time Charge + Quantity for Option Value#
- Independent Add-on Quantities: Customers can select multiple units of an add-on (e.g., 3 gift bags or 2 greeting cards) without having the cost multiplied by bulk main product quantities (e.g., 50 t-shirts).
- Fixed Setup & Customization Fees: Ideal for one-off service fees such as logo engraving setup, embroidery digitization, or rush processing fees.
- Flexible Pricing Rules: Control minimum and maximum quantity limits per option value while maintaining one-time fee logic per order.
Supported Option Types#
One-time Charge is available across single and multi-selection option types, including:
- Color Swatch & Image Swatch
- Radio Button & Checkboxes
- Dropdown Menu, Color Dropdown & Image Dropdown
- Button & Combo Box
Step-by-Step Setup Guide#
Step 1: Create or Edit an Option
- Go to main page of Shopify admin -> Aris Product Options -> Aris Option.
- Click on Create Option Set (or edit an existing set).
- Add an option type for extra charges (e.g., Checkboxes, Dropdown Menu, Color Swatch, Image Swatch).
- Fill in your Option Values and assign your extra charges (Add Charge).
Step 2: Enable One-time Charge
- In the option values setup, locate the value with an extra charge.
- Tick the checkbox for One-time charge.
Step 3: (Optional) Enable Quantity for Option Value
- Turn on Show "Quantity" for option value if you want customers to select how many add-on units they need.
- Set Min / Max Quantity limits for the option value if desired.
Step 4: Save Changes
Choose your desired group of option and hit Save on the top right corner.
Real-World Use Cases
- Gift Wrapping / Cards: Buying 10 shirts for a team, but only requesting 2 Gift Boxes ($5 each) → Total Add Charge = $10 (instead of $5 × 2 × 10 = $100).
- Logo Digitization Fee: Buying 100 custom polo shirts with a $25 One-time Digitization Fee → Total Add Charge = $25.
- Personalized Engraving Fee: Fixed fee of $15 for custom text, regardless of how many items are in the order.