Independent Bank Group Inc is a bank holding company. It offers services such as checking and savings accounts, debit cards, online banking, including online account opening, mobile banking, eStatements and bank-by-mail and direct deposit services. The Company also offers business accounts and management services, including analyzed business checking, business savings, and treasury management services. The Company derives its income principally from interest earned on loans and, to a lesser extent, income from securities available for sale and securities held to maturity. The Company also derives income from noninterest sources, such as fees received in connection with various deposit services, mortgage banking operations and investment advisory services.