Add a budget field to tasks and enable WorkingHours to use the hourly rate to subtract from the budget to enable the user to see the burn rate and how much of the budget is remaining.
WorkingHours version: 2.6.5.0 Operating system: Windows 10
Have you had a look at these? Is your request different from them?
https://workinghours.timopartl.com/d/28 https://workinghours.timopartl.com/d/134
