The Public Provident Fund (PPF) is a favored long-term savings scheme in India, especially for risk-averse investors. With a current interest rate of 7.10% per annum, PPF allows individuals to invest a minimum of ₹500 and a maximum of ₹1.5 lakh annually. Monthly contributions can lead to substantial growth over time. For instance, if an investor contributes ₹5,000 monthly for 15 years, the maturity value can reach approximately ₹16.2 lakh, with total investments of ₹9 lakh and interest earned of about ₹7.2 lakh. Extending the investment for an additional 5 years can increase this amount to around ₹26.6 lakh, and after 25 years, it can grow to nearly ₹41.2 lakh. Similarly, higher monthly contributions of ₹10,000 and ₹12,000 can yield even larger final amounts. PPF also provides tax benefits under Section 80C, making it an attractive option for building a retirement corpus. To maximize returns, it is advisable to deposit before the 5th of each month, as interest is calculated based on the lowest balance during that period.