Overriding Cost Rates
By default, the labor cost rate specified for a user is used while calculating the labor cost of a task. You can override those rates per project.
To override the default rates, click on a project to open its panel and then click Project Actions ▸ ▸ Cost Rates.
In the above example, Chris Patt's cost rate for the project has been set to $50. As you can see, you can click on the Add button to add a rate, click on the Rate cell to edit a rate, or click on the icon to delete a row which will default the rate for that user back to the default rate.