Practice Manager only
You can update an employee cost rate using the Employee page. The new cost rate will take affect immediately. It's not date driven. Don't change the cost rate until all previous timesheets are keyed in.
Employee cost figures can display on client wip reports such as Pre-billing reports. You can change security settings so that only the relevant security groups can see these figures on reports. See To change security settings for reports below.
For confidentiality reasons, you may want to turn off access to the Salary /Cost tab in AE so that most staff (excluding super users or administrators) can't see what others may be getting paid or the benefits they are receiving. See To turn off access to the Salary / Cost tab (AE) below.