Cash reserve ratio refers to the minimum percentage of the total deposits of a bank which is required to be kept with the Central bank. All the commercial banks have to keep a certain percentage of their deposits in the form of minimum cash reserve ratio with the Central bank. For example, if the minimum reserve ratio is 10% and the total deposits of a commercial bank are ₹ 100 crores, it will have to keep ₹ 10 crores with the Central bank. If the minimum reserve ratio is 15%, the bank will have to keep ₹ 15 crores with the Central bank. Thus, when cash reserve ratio is increased, availability of credit is reduced and when the cash reserve ratio is reduced, Availability of credit is increased.