Udyog Aadhaar is a government registration system introduced by the Ministry of Micro, Small, and Medium Enterprises (MSME), Government of India, to provide a unique identification number to small and medium businesses. It is a 12-digit unique number issued to micro, small, and medium enterprises (MSMEs) to simplify the process of availing benefits under government schemes.

The main objective of Udyog Aadhaar is to make it easier for entrepreneurs and small business owners to register their ventures and access support such as subsidies, loans at lower interest rates, credit guarantees, and various incentives offered by the central and state governments.