Public Provident Fund Calculator: According to FinFix, at the current interest rate of 7.1% for the April-June 2024 quarter, a maximum investment of Rs 1.5 lakh annually in PPF will yield an maturity amount of Rs 40,68,209/- after 15 years. This means that Rs 22,50,000/- invested over 15 years will earn you an interest of Rs 18,18,209/- If you extend PPF twice for a block of five years each, your maturity amount will cross Rs 1 crore at Rs 1,03,08,014.97/-