PPF deposit: You can earn this much extra tax free interest on PPF by depositing before April 5

PPF Deposit to earn extra tax-free interest: Currently, PPF investments yield an interest rate of 7.1% per annum. The interest earned is exempt from the tax. However, not many people know the PPF Deposit rule that makes them earn extra tax-free interest. Read on to learn how to use this rule to earn extra tax-free interest.