The amount the client pays us for completing the project.
For fixed-price projects, this is the sum of the contract price agreed by the client in a tender and the income from any additional work done in the meantime.
For T&M projects, it is the total amount invoiced on the basis of expenditure over the whole duration of the project.
For flat-fee / retainer based projects, e.g. support, it is the total fees paid for a given period.