https://www.finaid.org/questions/divorce.phtml
Obligation to Help Pay for College
Is the non-custodial parent required to help pay for college?
The Federal government does not consider the income and assets of the non-custodial parent in determining a student's financial need. However, it does consider child support received by the custodial parent.
Many private colleges do consider the non-custodial parent as a potential source of support, and require a supplemental financial aid form from the non-custodial parent. This affects the awarding of the school's own aid, but not Federal and state aid.
