The tenure of a PPF account is 15 years. But it can be extended for further 5 years after its completion and it goes on.
Now, let us discuss what if one wants to withdraw money from PPF account.
First check your eligibility
A subscriber can apply for withdrawal from PPF only on completion of six years from the end of the year in which the initial subscription was made. Financial years are considered for calculating the number of years. E.g., if a PPF account is opened in April 2001, it will complete its first year in March 2002 and you can withdraw from it only from April 2007.
The amount that can be withdrawn is 50% of the balance at the end of the fourth year preceding withdrawal or the year immediately preceding it, whichever is lower, less the amount of loan if any.
A depositor can make only one withdrawal in a year. A declaration to this effect should be given in the Form C used for withdrawal.
One has to fill-up Form-C and submit it with pass-book in your bank or post office. The form can be downloaded from here.