In addition to business expenses, individuals may reduce income by an allowance for personal exemptions and either a fixed standard deduction or itemized deductions. One personal exemption is allowed per taxpayer, and additional such deductions are allowed for each child or certain other individuals supported by the taxpayer. The standard deduction amount varies by taxpayer filing status. Itemized deductions by individuals include home mortgage interest, property taxes, certain other taxes, contributions to recognized charities, medical expenses in excess of 7.5% of adjusted gross income, and certain other amounts.