How the PPF Calculator Works
Enter the amount you plan to invest each year, the number of years you'll invest for, and the interest rate. The current PPF interest rate is set by the government and reviewed quarterly, so it's entered manually here rather than fetched live.
The calculator assumes your full annual investment is made at the start of each financial year, and interest compounds annually on the balance — a simplified but standard way to project PPF growth.
You'll see your total contributions, total estimated interest, the maturity value, and a year-wise table showing how your balance grows.
Formula Used
For each year, the balance grows as:
Balance = (Previous Balance + Annual Investment) × (1 + r)- rAnnual PPF interest rate (as a decimal)
- Annual InvestmentAmount invested at the start of each financial year
Example Calculation
A common example is investing the maximum permissible amount for the standard 15-year PPF tenure.
- Annual Investment₹1,50,000
- Investment Period15 years
- Interest Rate7.1% p.a.
- ResultTotal Contributions ≈ ₹22,50,000, Maturity Value ≈ ₹40,68,209
Important Assumptions
- PPF rules, the statutory maximum annual investment (currently ₹1.5 lakh) and the government-notified interest rate can change over time — the rate used here is whatever you enter, and you should verify the current rate before relying on this for planning.
- This calculator assumes the full annual contribution is made at the start of each financial year (the most favourable timing for interest accrual). Contributing in smaller instalments through the year will result in slightly lower actual interest than shown here.
- PPF has a standard lock-in of 15 years, extendable in blocks of 5 years; partial withdrawals and loans against the balance (permitted under PPF rules from certain years onward) are not modelled in this calculator.
- Maturity proceeds from PPF are currently tax-exempt under the EEE (Exempt-Exempt-Exempt) status, but tax rules can change — this calculator does not provide tax advice.