Add add-ons and let clients choose quantity

A one-off service does not have to have one fixed price. You can make some items optional and let the client choose. That way you sell a base offer and its extras as one service — for example, a logo package with an optional extra concept round. Both options are columns in the service's Items table: Addon makes an item optional, and Quant. lets the client choose how many. Services are in Settings › Sales › Services.

Make items optional or countable

1. Open Settings › Sales › Services and select a one-off service.
2. In the Items table, add a row for the base offer and a row for each extra, each with a Unit price.
3. Tick Addon on each row the client may choose to take. The client always pays for every row without the tick.
4. Tick Quant. on a row where the client chooses how many. Set Min to the smallest amount you are willing to do, and Max to the most you can deliver.
5. Type a Unit for that row, such as hour, page or post, so the row says what the client pays for.
6. Select Save, then open the service's link and check the order page as a client.

How the price is shown

Only a service with no add-ons and no client-chosen quantities has a single price. As soon as any item is an add-on or has a quantity the client chooses, Zendo shows the price as Starting at the lowest amount:

• on the Front Desk;
• in the Price column of the services list;
• in the service editor, where Total shows from the lowest amount.

What the client sees when ordering

On the order page, the client ticks the add-ons they want and sets each quantity between your Min and Max. Zendo shows the allowed range under the item, for example "Select number between 1 - 3". The total updates as the client changes their choices. Then they fill in the Order Form, if the service has one, and pay.

The order's amount is the total of what the client chose, and its line items list those choices. If the service is set to create a request, Zendo creates the request together with the order. See Decide what happens after a purchase.

Subscriptions use packages, not add-ons

A subscription has no items table and no add-ons. Instead, you set up packages: tiers, each with its own prices per billing cycle and its own request limits. To offer more to a subscription client, you offer a higher package. See Sell a subscription with packages.

Related

• Sell a fixed-price service
• Choose a service type
• Sell a subscription with packages
• Set up your Front Desk

Updated on: 09/11/2026