The concept
What PPF is
A Public Provident Fund is a government-backed, fixed-rate savings scheme with a statutory lock-in period, commonly 15 years.
This calculator assumes a level annual contribution made at the start of each year and a constant assumed rate for the full period.
The method
How the calculation works
The entered annual contribution is compounded once per year at the assumed rate, using an annuity-due model that assumes each year's contribution is made before interest is credited. The scheme's actual rate is set and revised by the government each quarter and is not fetched or assumed here.
C is the annual contribution, r is the annual rate and n is the number of years, compounded as an annuity due.
Worked example
A neutral example
Contributing ₹1,50,000 each year for 15 years at an assumed 7.1% annual rate produces an illustrative maturity value that estimates growth, not a forecast.
This example explains the method. It does not recommend a financial action or predict an outcome.
Frequently asked
PPF Calculator questions
Is 7.1% the guaranteed PPF rate?+
No. The rate shown is only a starting assumption you can change. The actual PPF rate is set by the government and revised periodically.
Does this calculator apply the 15-year lock-in rule, partial withdrawals or extension rules?+
No. It computes maturity value only under a level contribution and constant rate assumption.
Is PPF interest and maturity value taxable?+
This calculator does not model tax treatment. Confirm current rules for your situation before making a decision.