See the Administrator Setup section here to setup Commission Plans to use in the following manner:
Pay Commissions
Commissions are scheduled per order. To schedule a commission payment within a project, navigate to Commissions > Schedule Payment. If you have already assigned a Salesperson to a commission plan, the plan should default automatically. However, you can switch the plan if needed. You also have the option to override the rate and/or amount if necessary. Complete all required fields and select Schedule Payment.
Commission Payables Report
To generate a report on all scheduled commissions, go to Analysis > Print Reports > Commission Payables Report.
Enter the desired date range and select Run Report. The report will provide a breakdown by Salesperson, with a Grand Total displayed at the bottom.
Mark Sales Commissions as Paid
In cases where you mistakenly marked a Sales Commission as paid and need to reverse it, simply right-click on the Sales Commission and select Mark as Unpaid.
For a more in depth look at how to setup Commission Plans, how to schedule Commissions and more see the video below!
Note: Estimated Commissionable Cost = Sum of Purchase Orders.
When selecting the closing date range, choose the day after the end date to ensure the correct period is included.