Pro forma is a Latin term meaning "as a matter of form". It is used to describe doing something in a perfunctory manner to satisfy minimum or basic requirements. Pro forma rulings may be made by a court as a formality in order to proceed with the progress of a case.
In a financial context, it used to present data on an "as if" basis, where one or more assumptions or hypothetical conditions are built into the data. For example, a pro forma income statement might report the transactions of a group on the basis that a subsidiary acquired partway through the reporting period had been a part of the group for the whole period.
