Overseas Indians, officially known as Non-Resident Indians (NRI/NRIs) or Persons of Indian Origin (PIO/PIOs), are people of Indian birth, descent or origin who live outside the Republic of India. According to a Ministry of External Affairs report, there are 32 million NRIs and PIOs residing outside India. India remains the largest country of origin for expatriates and immigrant communities with a 55 million-strong diaspora across the world, including the Romani people.[4
Strictly asserting, the term says non-resident refers only to the tax status of a person who, as per section 6 of the Income-tax Act of 1961, has not resided in India for a specified period for the purposes of the Income Tax Act. The rates of income tax are different for persons who are "resident in India" and for NRIs. For the purposes of the Income Tax Act, "residence in India" requires stay in India of at least 182 days in a financial year or 365 days spread out over four consecutive years and at least 60 days in that year. According to the act, any Indian citizen who does not meet the criteria as a "resident of India" is a non-resident of India and is treated as NRI for paying income tax.