For taxpaying purposes, the CUIT and CUIL (Código Único de Identificación Tributaria, Unique Code for Taxpaying Identification and Código de Identificación Laboral, Unique Code for Laboral Identification). An example of the ID is 20-10563145-8. It is based on the DNI and appends 2 numbers at the beginning and one at the end. For example, 20 and 23 for men, 27 for women, and one control digit at the end. Employees have a CUIL (assigned at the moment the DNI is created), and employers have a CUIT. The first two digits to identify the CUIT for companies are for instance: 30 or 33. If a person decides to open a company of its own, his CUIL usually becomes his CUIT. The CUIT was needed because a different identification is required for companies, who cannot be identified by a DNI number.