Hello Jyoti, the minimum age limit for candidates to apply for RBI Grade B exam is 21 years while the upper age limit is 30 years as on May 1, 2019. For candidates with M.Phil. and Ph.D. qualifications, the upper age limit will be 32 and 34 years respectively. However, if any candidate falling under the reserved category then they are eligible for relaxation in upper age limit as per Government of India norms.