An individual income tax, also called a personal income tax, is a tax on a person’s income. Income includes wages, salaries, and other earnings from one’s occupation; interest earned by savings accounts and certain types of bonds; rents (earnings from rented properties); royalties earned on sales of patented or copyrighted items, such as inventions and books; and dividends from stock. Income also includes capital gains, which are profits from the sale of stock, real estate, or other investments whose value has increased over time.