About the PPF Calculator
This PPF calculator projects how a Public Provident Fund account grows with yearly deposits. Enter how much you deposit each financial year (₹500 to ₹1,50,000), the PPF interest rate, the account duration and when in the year you deposit, and it shows the maturity amount, total deposits, interest earned and a year-by-year balance table.
PPF is a government-backed small savings scheme with a 15-year lock-in that can be extended in blocks of 5 years. Interest is compounded annually and is tax-free, and deposits qualify for the deduction long known as Section 80C (Income-tax Act, 1961), which is available only under the old tax regime; from 1 April 2026 the Income-tax Act, 2025 replaced the 1961 Act and carries this deduction under its own section numbering. The rate is notified by the Ministry of Finance every quarter: the National Savings Institute lists 7.1% a year for every quarter from 1 April 2020 to 30 September 2026 (July–September 2026 being the latest notified quarter when this page was updated). The rate for later quarters may differ, so check the current notification before relying on the result.
Interest is calculated on the lowest balance between the 5th and the end of each month, so depositing by 5 April earns interest for the full year. Choosing “end of year” shows the effect of depositing late, when that year’s deposit earns almost no interest. The projection assumes the rate stays constant for the whole period and models exactly 15 (or 20, 25…) yearly deposits and interest credits; officially the account matures 15 full financial years after the end of the year it was opened, so your real statement may include one extra partial year.
With the default inputs, the maturity amount (tax-free) is ₹4,068,209.22. Change any value above to recalculate instantly.
How to use the ppf calculator
- 1Enter how much you will deposit each financial year, up to ₹1,50,000.
- 2Enter the current PPF rate (7.1% for every quarter up to July–September 2026).
- 3Choose 15 years or an extended duration in 5-year blocks.
- 4Pick whether you deposit by 5 April or at the end of the year.
- 5Optionally choose your old-regime tax slab to estimate the 80C saving.
Formula and method
PPF interest is compounded once a year and credited on 31 March. When the yearly deposit D is made by 5 April, it earns interest for the entire year, so the maturity value is the future value of an annuity due: each deposit grows for between 1 and n years at rate r. If deposits are made at the end of the year, the last factor of (1 + r) drops out.
The calculator steps through each year: interest = (opening balance + deposit) × r when depositing early, or opening balance × r when depositing late. Total interest is the maturity amount minus total deposits. The 80C estimate multiplies the yearly deposit by your old-regime slab rate plus 4% health and education cess.
- F
- Maturity amount
- D
- Yearly deposit (₹500 to ₹1,50,000)
- r
- Annual PPF interest rate as a decimal
- n
- Number of years (15, or longer with 5-year extensions)
Worked examples
Maximum ₹1.5 lakh every year for 15 years at 7.1%
Depositing ₹1,50,000 by 5 April each year for 15 years totals ₹22,50,000. At 7.1% compounded yearly the account matures at about ₹40,68,209, so ₹18,18,209 comes from tax-free interest.
₹50,000 a year, 20% slab under the old regime
Fifteen deposits of ₹50,000 grow to about ₹13,56,070. Each deposit also cuts taxable income by ₹50,000, saving ₹50,000 × 20% × 1.04 = ₹10,400 a year, or ₹1,56,000 over 15 years.
Extended once to 20 years
Extending with contributions for another 5 years adds ₹7,50,000 of deposits but lifts the maturity amount from ₹40.7 lakh to about ₹66.6 lakh, because the large balance keeps compounding.
₹1,000 a month saved and deposited at year-end
Depositing ₹12,000 at the end of each year means each year’s deposit earns no interest in that year. After 15 years the balance is about ₹3,03,881 on ₹1,80,000 invested.
Frequently asked questions
What is the current PPF interest rate?+
The PPF rate is notified by the Ministry of Finance every quarter. It has been 7.1% per year, compounded annually, for every quarter from 1 April 2020 to 30 September 2026, according to the National Savings Institute. Check the latest notification before investing, as the rate can change each quarter.
What is the maximum and minimum PPF deposit?+
You must deposit at least ₹500 and can deposit up to ₹1,50,000 in a financial year, in a lump sum or in instalments. Amounts above ₹1.5 lakh earn no interest and do not qualify for the 80C deduction.
Is PPF interest taxable?+
No. PPF has EEE status: deposits qualify for the Section 80C deduction under the old tax regime, interest is tax-free, and the maturity amount is tax-free. Under the new regime you lose only the deduction. From tax year 2026-27 these rules sit in the Income-tax Act, 2025, which renumbered the old sections.
Can I extend my PPF account after 15 years?+
Yes. Within one year of maturity you can extend the account in blocks of 5 years, with or without fresh contributions, by submitting the extension form at your bank or post office. Without the form, it continues without contributions.
Why should I deposit in PPF before the 5th of the month?+
PPF interest is calculated on the lowest balance between the 5th and the last day of each month. Deposits made after the 5th miss that month’s interest, so a lump sum by 5 April earns interest for all 12 months.
Can I withdraw from PPF before maturity?+
Partial withdrawals are allowed from the 7th financial year, subject to limits. Loans against the balance are possible from the 3rd to the 6th year. Premature closure is only allowed after 5 years for specific reasons such as serious illness or higher education.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.