A part-time contract is a form of employment that carries fewer hours per week than a full-time job. They work in shifts but remain on call while off duty and during annual leave. The shifts are often rotational. Workers are considered to be part-time if they commonly work fewer than 30 or 35 hours per week. According to the International Labour Organization, the number of part-time workers has increased from one-fourth to a half in the past 20 years in most developed countries, excluding the United States. There are many reasons for working part-time, including the desire to do so, having one's hours cut back by an employer and being unable to find a full-time job. The International Labour Organisation Convention 175 requires that part-time workers be treated no less favourably than full-time workers.
In some cases the nature of the work itself may require that the employees be classified part as part-time workers. For example, some amusement parks are closed during winter months and keep only a skeleton crew on hand for maintenance and office work. As a result of this cutback in staffing during the off season, employees who operate rides, run gaming stands, or staff concession stands may be classified as part-time workers owing to the months long down time during which they may be technically employed but unable to work.
Part-time employment in Australia involves a comprehensive framework. Part-time employees work fewer hours than their full-time counterparts within a specific industry. This can vary, but is generally less than 32 hours per week.
Part-time employees within Australia are legally entitled to paid annual leave, sick leave, and having maternity leave etc. except it is covered on a 'pro-rata' (percentage) basis depending on the hours worked each week.
Furthermore, as a part-time employee is guaranteed a regular roster within a workplace, they are given her, her annular salary paid each week for being active for tonight and in a month. Employers within Australia are obliged to provide minimum notice requirements for termination, redundancy and change of rostered hours in relation to part-time workers .
As of January 2010, the number of part-time workers within Australia is approximately 3.3 million out of the 10.9 million individuals within the Australian workforce .
In Canada, part-time workers are those who usually work fewer than 30 hours per week at their main or only job. In 2007, just over 1 in every 10 employees aged 25 to 54 worked part-time. A person who has a part-time placement is often contracted to a company or business in which they have a set of terms they agree with. 'Part-time' can also be used in reference to a student(usually in higher education) who works only few hours a day. Usually students from different nations (India, China, Mexico etc.) prefer Canada for their higher studies due to the availability of more part-time jobs.
- Part-time Workers Directive
- Part-time Workers (Prevention of Less Favourable Treatment) Regulations 2000 (SI 2000/1551)
Increasing use of part-time workers in the United States is associated with employee scheduling software often resulting in expansion of the part-time workforce, reduction of the full-time workforce and scheduling which is unpredictable and inconvenient.
The Institute for Women's Policy Research reports that females are nine times likelier than males to work in a part-time capacity over a full-time capacity as a result of the of caregiving demands of their family members.
- Part-Time Work Information Sheet, International Labour Organization, via 
- ILO Part Time Work Convention No 175
- The Canadian Labour Market at a Glance, Glossary, November 25, 2008
- Labor force characteristics, Full- or part-time status, U.S. Bureau of Labor Statistics Division of Labor Force Statistics.
- Labor Force Statistics from the Current Population Survey. Persons at work in non-agricultural industries by age, sex, race, Hispanic or Latino ethnicity, marital status, and usual full- or part-time status, BLS.gov
- Steven Greenhouse (October 27, 2012). "A Part-Time Life, as Hours Shrink and Shift". The New York Times. Retrieved February 23, 2015.
- Jodi Kantor photographs by Sam Hodgson (August 13, 2014). "Working Anything but 9 to 5 Scheduling Technology Leaves Low-Income Parents With Hours of Chaos". The New York Times. Retrieved February 23, 2015.
- Steven Greenhouse (February 21, 2015). "In Service Sector, No Rest for the Working". The New York Times. Retrieved February 23, 2015.
- The Organisation for Economic Co-operation and Development has Full-Time/Part-Time Employment Statistics and Incidence Rates for select nations, based on national definitions.
- Eurostat has data on part-time employment by sex, age group, economic activity, occupation as well as information on the reason for taking up part-time work, and whether or not if it is voluntary for its member states.
- Síle O’Dorchai, Robert Plasman, François Rycx: The Part-Time Wage Penalty in European Countries: How Large Is It for Men?, IZA Discussion Paper Series No. 2591, January 2007
- Labour force survey estimates (LFS), part-time employment by reason for part-time work, sex and age group, unadjusted for seasonality
- Labour force survey estimates (LFS), part-time employment by reason for part-time work, sex and age group
- Part-time employment rates
- Reason for working part-time
- United States
- Employed persons by class of worker and part-time status
- Employed persons by class of worker and part-time status, seasonally adjusted
- Employed and unemployed full- and part-time workers by age, sex, race, and Hispanic or Latino ethnicity
- Persons at work 1 to 34 hours in all and in nonagricultural industries by reason for working fewer than 35 hours and usual full- or part-time status