Services
Add-ons and booking extras
Letting customers bolt extras onto a service, and why doing so can make available times disappear.
Add-ons — shown as booking extras — let a customer bolt something onto a service while booking. A treatment on top of a cut, a longer massage, a finish upgrade. Each one adds its own time and its own price.
What add-ons are
An add-on belongs to a service. The customer picks the service first, then chooses any extras offered with it. The appointment that results is the service plus every extra they picked — both in duration and in price.
They are a better fit than separate services when the extra never happens on its own. If someone could book it by itself, make it a service instead.
Setting one up
Open Services, choose the service, and add a booking extra.
| Setting | What it does |
|---|---|
| Extra name | What the customer sees beside the tick box. |
| Extra duration (minutes) | Added to the appointment length. Set 0 for something that takes no extra time but costs more. |
| Extra price | Added to the total shown to the customer. |
| Active | Inactive extras stop being offered. Appointments already booked with one keep their time and price. |
How add-ons change availability
This is the part that surprises people. Because an add-on extends the appointment, a slot that fits the service may not fit the service plus extras. Tick a 30-minute add-on and some of the times that were available a moment ago disappear.
That is correct behaviour — the longer appointment genuinely does not fit — but it looks like a glitch if you are not expecting it. It is also a common reason a customer reports “times vanished while I was booking”.
Long add-ons on a full day
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Last reviewed July 30, 2026.