Expected Family Contribution (EFC)/Student Aid Index (SAI) The amount that a student and family can be expected to contribute towards educational expenses for the academic year. The EFC or SAI is calculated when the student submits a financial aid application (FAFSA). The calculation uses a Congressionaly-mandated forumla to determine the student's eligibility for financial assistance programs. The family contribution may be towards transportation, personal expenses as well as tuition and fees.