The Regional Capacity Building and Knowledge Institute, Ranchi was established in 1982 and was earlier located in the Office Complex of Principal Accountant General (A&E), Bihar at Ranchi. From September, 1996 it started functioning from a newly constructed double storied building of its own. At present it is one of the ten Regional Training Institutes of Indian Audit & Accounts Department (IA&AD). This RCB&KI caters to the training need of 17 offices of IA&AD situated in Bihar, Jharkhand and Odisha.

This Institute has been identified as a knowledge Centre for “Infrastructure”, "Health" and “Education”. This Institute organizes all India training programmes on Knowledge center topics in addition to General and IT related courses for 17 user offices.

A Regional Advisory Committee (RAC) notified by the Comptroller and Auditor General of India advises the Institute in deciding the Annual Training calendar and other administrative  issues. The RAC meets twice in a Calendar Year to provide valuable suggestion and feedback which is chaired by senior-most IA&AS officer.

This institute is headed by a Principal Director (Sr. Administrative Grade)/Director General who is assisted by a team of Core Faculties and Administrative staff and officers.