CSS PROFLE schools can use whatever formula they please in giving out FA as long as they obey government rules in dispensing government aid. Usually, from what I have seen, 60% of institutional EFC is what each sibling gets when there are two in college at same time. However, the FAFSA EFC is halved.
A crucial part of the FA officer’s job is to make sure that every bit of eligible government aid is distributed first according to how colleges use it. For instance, a student may be eligible for Federal subsidized loans or work study, but there may be internal college rules that assure no loan packages, or internal policies that limit work study.
My neighbor’s kids went to Columbia U and NYU They had two in college for several years. NYU did call to get specific sibling college info. Columbia did not. Columbia gave out subsidized loans and work study as additional financial aid whe a sibling entered college. , which was not