Features of a PPF account The minimum duration of a Public provident fund (PPF) account is 15 years. The amount that is required to open a PPF account is Rs.100. A Person can open only one PPF account under his/her name. Deposits in PPF account must be made at least once a year for 15 years. Between the third and fifth financial year from the date of opening the public provident fund account, PPF loans can be availed against the account.