Updated Jan 13, 2021 | 07:18 IST PPF account matures in 15 years and the account holder is required to deposit a minimum of Rs 500 every financial year to keep the account active Have an inactive PPF account? Know how to revive it (File photo). New Delhi: Public Provident Fund (PPF) is one of the most popular investments in India and is used for creating long term savings. Investments with PPF come with a tenure of 15 years and the depositor is required to make a deposit of minimum Rs 500 in a financial year to keep the account active. Failing to make the deposits in time leads to the account being termed as inactive. Experts say, with such a long tenure many people fail to keep depositing the minimum required amount, because of which many accounts have been made inactive.