Indentured servitude is a form of labor in which a person is contracted to work without salary for a specific number of years. The contract, called an "indenture", may be entered "voluntarily" for purported eventual compensation or debt repayment, or it may be imposed "involuntarily" as a judicial punishment. Historically, it has been used to pay for apprenticeships, typically when an apprentice agreed to work for free for a master tradesman to learn a trade (similar to a modern internship but for a fixed length of time, usually seven years or less). Later it was also used as a way for a person to pay the cost of transportation to colonies in the Americas.
Like any loan, an indenture could be sold; most employers had to depend on middlemen to recruit and transport the workers, so indentures (indentured workers) were commonly bought and sold when they arrived at their destinations. Like prices of slaves, their price went up or down depending on supply and demand. When the indenture (loan) was paid off, the worker was free. Sometimes they might be given a plot of land.
Indentured workers could usually marry, move about locally as long as the work got done, read whatever they wanted, and take classes.
Indentured servitude in British America
Until the late 18th century, indentured servitude was common in British America. It was often a way for Europeans to migrate to the American colonies: they signed an indenture in return for a costly passage. However, the system was also used to exploit many of them, as well as Asians (mostly from India and China) who wanted to migrate to the New World. These Asian people were used mainly to construct roads and railway systems. After their indenture expired, the immigrants were free to work for themselves or another employer. At least one economist has suggested that “indentured servitude was an economic arrangement designed to iron out imperfections in the capital market".
In some cases, the indenture was made with a ship's master, who sold the indenture to an employer in the colonies.