If you try to represent the contract amount exactly in project, then this is only possible if you are allowed to deposit a contract amount of EUR 0.00 for services that have not yet been commissioned but may already be billed. Fortunately, you can do that in Projo too — but there appears a clue that could cause confusion (see screenshot). In this case, however, I do not want to select “Is increased by bookings”, as this then increases the contract amount. However, it is a service that has not been commissioned — but may be billed (out of goodwill, up to assignment, which can always be dragged on by authorities). Perhaps this could be solved a bit more elegantly in the future. Here is another example: Contract amount = 10€ Service A = contracted = 5€ Service B = contracted = 5€ Service C = not commissioned = 5€ Billable hours for performance C so far = €2.50 If you now select “Is increased by bookings”, the 2.50€ would be added to the contract amount. However, the contract amount is only €10 and not €12.50 currently. I hope that's understandable.