Head Of Household Filing Status Definition: You must meet the following requirements: 1. You are unmarried or considered unmarried on the last day of the year. 2. You paid more than half the cost of keeping up a home for the year. 3. A qualifying person lived with you in the home for more than half the year (except temporary absences, such as school). However, your dependent parent does not have to live with you. A foster child must live with you all year. Source