British East India Company rule

1775 - 1800
During this period, the East India Company began tax administration reforms in a fast expanding empire spread over 250 million acres (1,000,000 km2), or 35 per cent of Indian domain. Indirect rule was also established on protectorates and buffer states. China was the world's largest economy followed by India and France. The gross domestic product of India in 1800 was estimated at about 60 per cent that of China.

The Company treasury reported annual revenue of £111 million in circa 1800 thus registering an average annual growth of merely 0.1 per cent throughout the turbulent 18th century. Almost all of the Indian land revenues were diverted by the Company to help the British Crown defend herself in the Napoleonic Wars.

1800 - 1825
China was the world's largest economy followed by India and France. The gross domestic product of India in 1825 was estimated at about 50 per cent that of China. British cotton exports reach 3 per cent of the Indian market by 1825.
1825 - 1850 China was the world's largest economy followed by the UK and India. Industrial revolution in the UK catapulted the nation to the top league of Europe for the first time ever. During this period, British foreign and economic policies began treating India as an unequal partner for the first time.[12] English replaced Persian as the official language of India. The gross domestic product of India in 1850 was estimated at about 40 per cent that of China. British cotton exports reach 30 per cent of the Indian market by 1850.