Before you start working with the additional payment requests, make sure that the following settings are in place:
Additional Payment Categories
Categories for additional payments define:
- Coefficient for calculating the payment (multiplied by the number of hours to be paid out)
- Whether the additional payment request is submitted in hours or days
The payment categories can be edited under Settings > Site Lists and Libraries > Additional Payment Categories..png)
Approval Workflow for Additional Payment Requests
Approval workflow for approving additional payment requests must be set up. It is configured under Settings > Settings and Configuration > Core HR. Click Processes and Approval Workflows and then Approval Workflows. 
Additional Payment workflow is a status approval workflow with 2 steps:
- Line manager approval (common for all the employees)
- Team approval. This is a code based step that defines behavior of the workflow depending on the employee's team. For more details, check the Approve Additional Payment article.