How can I setup an on call employee so that I only do pay run when he/she is called up for some work to do?

There are five options for you to choose from when setting up an employee, noleodelacalzada.

In QBO, the Employment Types are as follows:

• Casual
• Full Time
• Labour Hire
• Part Time
• Superannuation Income Stream

I'd suggest setting the employee up as Casual or Labour Hire. Whenever they're on call for work, you can include them in your pay run.

Here's how:

1. Click the Pay Run button in the upper right-hand corner.
2. Choose a Pay Schedule.
3. Check the box for Manually add employees to this pay run.
4. Click Create.
5. In the No employees page, click the add some employees link.
6. In the Add employees to this Pay Run? screen, type the employee's name and click the Add Employee button.
7. Do the same steps until you're done adding all of the employees.
8. Click Close.
9. Continue running your payroll as you normally would.

You can also refer to this article for more details about adding employees in QBO.

I've attached some screenshots too.

Let me know if you have any follow-up questions and I'll answer them for you.