Who is a Dependent? A dependent is a person whom the borrower supports financially. In most cases, the dependent is a member of the mortgage applicant's household, with certain exceptions, such as a college student living on campus but being fully supported by his parents. In many cases, an applicant can use the number of dependents listed on the most recent tax return as a guideline when filling out a mortgage application. When you’re claiming a dependent who is a child, there are further requirements: * The child has to have lived with you for at least half of the year. * The child has to be related to you as a son, daughter, stepchild, foster child, brother, sister, stepbrother, stepsister, or a descendant of any of these * The child must be 18 or younger at the end of the year, or under 24 if a student. To be a student, the child must have attended school full-time during at least five months of the year. The five months don’t have to be in a row. * The child must be younger than you (or your spouse, if married filing jointly), unless the child is disabled.