We have projects where we charge professional fees at an hourly rate and others that are billed on a flat rate basis.
We are in the process of configuring an administration fee applicable to professional fees. For hourly rate projects we added an administration fee percentage directly in the billing rule calculation formula, and it works.
On the other hand, we cannot do the same for fixed-price projects, the billing rule doesn’t allow access to the calculation formula. Is there another way to apply an administration fee to progress billing?