How to use the PPF calculator
- Enter how much you will deposit each year – between ₹500 and ₹1,50,000.
- The interest rate starts at the current PPF rate (7.1% for October–December 2026).
- Choose the period: 15 years to maturity, or longer if you extend in blocks of 5 years.
How PPF interest works
Interest is worked out every month on the lowest balance between the 5th and the end of the month, and credited once a year on 31 March. Depositing the whole year’s amount by 5 April earns interest for the full year – the calculator assumes this.
\text{Maturity} = A \times \dfrac{(1 + r)^{n} - 1}{r} \times (1 + r)A– yearly deposit,r– yearly rate as a decimal,n– number of years
Deposited ₹22,50,000; maturity value ₹40,68,209, of which ₹18,18,209 is tax-free interest.
PPF maturity at 7.1%
| Yearly deposit | 15 years | 20 years | 25 years |
|---|---|---|---|
| ₹12,000 | ₹3,25,457 | ₹5,32,663 | ₹8,24,641 |
| ₹25,000 | ₹6,78,035 | ₹11,09,715 | ₹17,18,002 |
| ₹50,000 | ₹13,56,070 | ₹22,19,429 | ₹34,36,005 |
| ₹1,00,000 | ₹27,12,139 | ₹44,38,859 | ₹68,72,010 |
| ₹1,50,000 | ₹40,68,209 | ₹66,58,288 | ₹1,03,08,015 |
PPF rules at a glance
- Deposit: ₹500 to ₹1,50,000 a financial year, in one go or in instalments.
- Lock-in: 15 years; extend for 5 years at a time, with or without new deposits.
- Tax: deposits qualify for Section 80C under the old tax regime, and the interest and maturity amount are tax-free (EEE).
- Withdrawals and loans: partial withdrawals from the 7th year; loans from the 3rd to the 6th year.
Compare with the SIP calculator for market-linked returns, or the FD calculator for a bank deposit.
Frequently asked questions
What is the current PPF interest rate?
7.1% a year for October–December 2026. The government reviews it every quarter.
How much will ₹1.5 lakh a year in PPF become in 15 years?
About ₹40.68 lakh at 7.1% – ₹22.5 lakh deposited and about ₹18.18 lakh in tax-free interest.
When should I deposit in PPF?
By 5 April each year. Interest is calculated on the lowest balance after the 5th of each month, so an early deposit earns interest for all 12 months.
Can I extend PPF after 15 years?
Yes, in blocks of 5 years, with or without new deposits. Apply within a year of maturity to extend with deposits.
Is PPF interest taxable?
No. PPF is EEE: deposits qualify for Section 80C (old regime), and both the interest and the maturity amount are tax-free.