Your performance will not affect your eligibility for aid for the current semester, so you will not have to repay any grant aid. (You will, of course, have to repay loans eventually, but that would be true even if you had straight A's), However, in order to continue to receive financial aid in future semesters, you must meet your school's Satisfactory Academic Progress standards. The standards vary somewhat from school to school, but they must include maintaining a certain cumulative GPA and completing a certain percentage of the credits that you begin. A typical SAP policy would be maintaining a 2.0 GPA and completing 67% of the credits you start. So, getting D in one or more classes doesn't automatically mean you'll lose your aid, but those grades can contribute to a lower GPA. If that GPA drops below your school's standards, you'll lose your aid going forward. If you do lose it, check with your school to see if they have an appeals process--most schools do. If you had a good reason for not meeting the standards that you can document, then you can be granted probation. This means that your aid will be reinstated for one semester while you work to improve your performance. Otherwise, you would have to manage without aid until you bring your GPA up enough to meet the standards. If you've lost your aid, you may still be eligible for private student loans through some lenders, such as Sallie Mae. Although you would need to repay any loan you receive, that option may keep you in school long enough to improve your GPA and get your aid restored.