Inspire Planner allows you to specify the Resource's Hourly Rate when the Resource is added as a Project Team member on the Project. This is ideal when you need to be able to define a Resource's rate specific to a Project.
This help article will walk you through the configurations needed to use Hourly Rate in Project Teams.
The first step is to set the field-level security for the Hourly Rate field to visible so that all Inspire Planner users have access to the field.
Now that the field-level security has been set to visible, you will need to add the Hourly Rate field to the Project Team page layout so that users can view and populate values.
To make it easier for users to see the Hourly Rate associated with a Project Team member, it would be best to also add Hourly Rate as a column in the Project Team related list in the Project Object.