The PPF one of the best tax-free saving schemes offered by the Indian government.

It is an investment avenue with a lock-in period of 15 years and one of the safest ones for the Indian middle class.

The interest rate is set and paid by the government every quarter.

The PPF is backed by central government of India, and so there are minimal chances of losing the principal amount. And a good compound interest rate certainly makes it an attractive option for debt investing.