The Tinkathia System or Teen Kathia System (Hindi: three Kathas), was an economic policy enforced by the East India Company in India. It was practiced largely in Eastern India and in states such as Bihar. The Tinkathia System was challenged by the Champaran Satyagraha led by Mohandas Gandhi, this in turn became a watershed moment in the Indian independence movement and it was based on that peasants had to grow indigo on the 3 parts of the land out of 20 parts.