Add-on pricing

Product options can be free (gather information) or paid (sell upgrades). This page covers how prices attach to options, how the live total works, and where the money and the choices end up.

Pricing an option

Give any input field a price and that amount is added when the field is engaged — ticked, chosen, filled in, or (for a Surcharge field) always. A single price applies per field.

In the free plugin, pricing is a fixed fee: a flat amount added when the option is used.

The Pro edition adds two more pricing modes:

• Per unit — multiply the price by a Number field’s value (e.g. £5 × 3 = £15).
• Percentage — a percentage of the product’s price (e.g. 10% of a £100 product = £10).

The live options total

When at least one option has a price, the product page shows a running Options total that updates instantly as the customer changes their choices. It’s formatted in your store’s currency — symbol, position, decimals and separators all come from your WooCommerce settings — and it’s announced to screen readers as it changes.

Into the cart and order

A customer’s selections travel all the way through:

• Cart — options are listed under the line item, and the item price reflects the add-ons.
• Checkout — the same breakdown is shown.
• Order — selections are saved to the order line item, visible on the admin order screen.
• Emails — they appear in the WooCommerce order emails.

Storage is HPOS compatible.

Variable products

For a variable product, build the options once on the parent product — every variation uses them. Add-on pricing is calculated against the chosen variation’s price, so a percentage add-on scales correctly when the customer switches variation.

Next

• The fields you can price: Option types.
• Show paid options only when relevant: Conditional logic.