Service period is a TERM used to describe a period of time in which an individual is employed by a company or organization. It is also referred to as a 'STINT' and can range from a few months to several years. Service period is often used to refer to the length of time an employee has been with a company, and is usually measured in years. It is important to note that service period does not necessarily mean that the employee is working full-time, as part-time employees may also be included in the calculation.