NRI banking refers to banking services provided to non-resident Indians (NRIs) by banks in India. The key types of NRI bank accounts are Non-Resident External (NRE) accounts denominated in Indian rupees, Non-Resident Ordinary (NRO) rupee accounts, and Foreign Currency Non-Resident (FCNR) accounts denominated in foreign currency. These accounts help NRIs manage funds from abroad, earn interest, and facilitate money transfers to and from India.