The economy of India is the eleventh largest economy in the world by nominal GDP and the fourth largest by purchasing power parity (PPP). In the 1990s, following economic reform from the socialist-inspired economy of post-independence India, the country began to experience rapid economic growth, as markets opened for international competition and investment. In the 21st century, India is an emerging economic power with vast human and natural resources, and a huge knowledge base. Economists predict that by 2020, India will be among the leading economies of the world.

India was under social democratic-based policies from 1947 to 1991. The economy was characterised by extensive regulation, protectionism, and public ownership, leading to pervasive corruption and slow growth. Since 1991, continuing economic liberalisation has moved the economy towards a market-based system. A revival of economic reforms and better economic policy in 2000s accelerated India's economic growth rate. By 2008, India had established itself as the world's second-fastest growing major economy. However, the year 2009 saw a significant slowdown in India's official GDP growth rate to 6.1%  as well as the return of a large projected fiscal deficit of 10.3% of GDP which would be among the highest in the world.

India's large service industry accounts for 62.6% of the country's GDP while the industrial and agricultural sector contribute 20% and 17.5% respectively. Agriculture is the predominant occupation in India, accounting for about 52% of employment. The service sector makes up a further 34%, and industrial sector around 14%.  The labor force totals half a billion workers. Major agricultural products include rice, wheat, oilseed, cotton, jute, tea, sugarcane, potatoes, cattle, water buffalo, sheep, goats, poultry and fish. Major industries include telecommunications, textiles, chemicals, food processing, steel, transportation equipment, cement, mining, petroleum, machinery, information technology enabled services and software.

India's per capita income (nominal) is $1124, ranked 139th in the world, while its per capita (PPP) of US$3176 is ranked 128th. Previously a closed economy, India's trade has grown fast,  India currently accounts for 1.5% of World trade as of 2007 according to the WTO. According to the World Trade Statistics of the WTO in 2006, India's total merchandise trade (counting exports and imports) was valued at $294 billion in 2006 and India's services trade inclusive of export and import was $143 billion. Thus, India's global economic engagement in 2006 covering both merchandise and services trade was of the order of $437 billion, up by a record 72% from a level of $253 billion in 2004. India's trade has reached a still relatively moderate share 24% of GDP in 2006, up from 6% in 1985.

Despite robust economic growth, India continues to face many major problems. The recent economic development has widened the economic inequality across the country. Despite sustained high economic growth rate, approximately 80% of its population lives on less than $2 a day (PPP). Even though the arrival of Green Revolution brought end to famines in India, 40% of children under the age of three are underweight and a third of all men and women suffer from chronic energy deficiency.

The Indian rupee is the only legal tender accepted in India. The exchange rate as on 23 March 2010 is 45.40 INR the USD, 61.45 to a EUR, and 68.19 to a GBP. The Indian rupee is accepted as legal tender in the neighboring Nepal and Bhutan, both of which peg their currency to that of the Indian rupee. The rupee is divided into 100 paise. The highest-denomination banknote is the 1,000 rupee note; the lowest-denomination coin in circulation is the 25 paise coin (it earlier had 1, 2, 5, 10 and 20 paise coins which have been discontinued by the Reserve Bank of India).

The Rupee hit a record low during early 2009 on account of global recession. However, due to a strong domestic market, India managed to bounce back sooner than the western countries. Since September 2009 there has been a constant appreciation in Rupee versus most Tier 1 currencies. On 11 January 2010 Rupee went as high as 45.50 to a United states dollar and on 10 January 2010 as high as Rupee 73.93 to a British Pound. A rising rupee also prompted Government of India to buy 200 tonnes of Gold from IMF.

The RBI, the country's central bank was established on 1 April 1935. It serves as the nation's monetary authority, regulator and supervisor of the financial system, manager of exchange control and as an issuer of currency. The RBI is governed by a central board, headed by a governor who is appointed by the Central government of India.

Today, more people can afford a bicycle than ever before. Some 40% of Indian households owns a bicycle, with ownership rates ranging from around 30% to 70% at state level.[1Housing is modest. According to Times of India, "a majority of Indians have per capita space equivalent to or less than a 10 feet x 10 feet room for their living, sleeping, cooking, washing and toilet needs." and "one in every three urban Indians lives in homes too cramped to exceed even the minimum requirements of a prison cell in the US."[137] The average is 103 sq ft (9.6 m2) per person in rural areas and 117 sq ft (10.9 m2) per person in urban areas

Around half of Indian children are malnourished. The proportion of underweight children is nearly double that of Sub-Saharan Africa. However, India has not had famines since the Green Revolution in the early 1970s. While poverty in India has reduced significantly, official figures estimate that 27.5%  of Indians still lived below the national poverty line of $1 (PPP, around 10 rupees in nominal terms) a day in 2004-2005 A 2007 report by the state-run National Commission for Enterprises in the Unorganised Sector (NCEUS) found that 65% of Indians, or 750 million people, lived on less than 20 rupees per day with most working in "informal labour sector with no job or social security, living in abject poverty."

Since the early 1950s, successive governments have implemented various schemes, under planning, to alleviate poverty, that have met with partial success. All these programmes have relied upon the strategies of the Food for work programme and National Rural Employment Programme of the 1980s, which attempted to use the unemployed to generate productive assets and build rural infrastructure. In August 2005, the Indian parliament passed the Rural Employment Guarantee Bill, the largest programme of this type in terms of cost and coverage, which promises 100 days of minimum wage employment to every rural household in all the India's 600 districts. The question of whether economic reforms have reduced poverty or not has fuelled debates without generating any clear cut answers and has also put political pressure on further economic reforms, especially those involving the downsizing of labour and cutting agricultural subsidies.