Post Office Savings Accounts is one the post office scheme which can be opened at minimum amount of Rs.20 at the interest rate of 4% per annum. The minimum balance amount to be maintained is Rs. 50 (for non cheque facility). For cheque facility, if an account is opened with Rs. 500 and the minimum balance to be maintained is Rs. 500 in account. Cheque facility can be taken on existing account.