On the dashboard, what is the difference between the non-billable value of the Time Performance widget and Hours widget?
The Hours widget includes time associated with employees only, not hours recorded against vendors in vendor bills. So the non-billable value here represents the project-related non-billable hours logged by employees.
The non-billable value of the Time Performance widget does not include PTO and Overhead hours. So the non-billable value here represents the non-billable hours logged by employees and vendors excluding PTO and Overhead.
So these two values will not match. Check out Core Help for more.