<p>The $136K after-tax income number is irrelevant. All schools, Duke included, use the parents’ Adjusted Gross Income (AGI) from their tax returns in evaluating need. Financial aid is primarily income driven and a good rule of thumb is that your EFC will be about 25-35% of AGI. So, with only one student in the family in college, it’s not surprising that your EFC would be in the $60K range with an AGI of $200K. With two students in college CSS Profile schools will expect each to pay 60% of the amount determined with one in college. So, if you had an EFC of $60K with one in college, you could expect your EFC to drop to $40K when your younger sibling enrolls.</p>