PPF Calculator: Estimate Your Public Provident Fund Maturity Value
What Is PPF?
Public Provident Fund (PPF) is a Government-backed savings scheme in India with a standard maturity period of 15 financial years from the end of the financial year in which the account is opened. It can be useful for people planning long-term savings.
You can deposit at least ₹500 and up to ₹1.5 lakh in a PPF account in a financial year. The Government notifies the PPF interest rate quarterly. The current rate is 7.1% per year for 1 July to 30 September 2026.
Use the calculator above to explore how your contribution amount, frequency, current balance, and investment period can affect an estimated maturity value.
What Is a PPF Calculator?
A PPF calculator is a planning tool that estimates the potential value of a PPF account. It uses the contribution amount, contribution frequency, current PPF balance, investment period, and the current notified rate.
The result is an estimate, not a guaranteed maturity amount. PPF rates can change every quarter, and actual deposits, withdrawals, loans, or account status can affect the final value.
How the PPF Calculator Can Help You
Use the calculator to compare different contribution amounts and frequencies, understand the effect of an existing balance, and set an informed long-term savings target. It updates the investment, estimated interest, and maturity value when you change an input.
It is particularly helpful for understanding the difference between a 15-year maturity projection and a longer projection that assumes an eligible five-year extension has been completed.
How PPF Interest Is Calculated
PPF interest is calculated each month on the lowest balance in the account between the 5th and the last day of that month. The interest is credited to the account at the end of the financial year.
For that reason, this calculator assumes each scheduled deposit is made on or before the 5th of the relevant month. A deposit made after the 5th may not earn interest for that month.
There is no single formula that exactly represents every PPF account: the notified rate can change quarterly and account activity can differ. The calculator estimates monthly interest using the current 7.1% rate and credits the estimated interest at the end of each financial year.
Illustrative PPF Formula
For a simple illustration with equal yearly deposits made at the beginning of each financial year and an unchanged annual rate, the future value can be written as:
FV = P × [((1 + r)n − 1) / r] × (1 + r)
Here, FV is the estimated future value, P is the yearly deposit, r is the annual interest rate expressed as a decimal, and n is the number of yearly deposits.
For example, investing ₹1 lakh at the beginning of each financial year for 15 years at a constant 7.1% rate gives an illustrative value of about ₹27.12 lakh. This is not a promise or an exact PPF-account calculation: actual notified rates and deposit dates can differ. The calculator above applies its stated monthly timing assumption instead.
How to Use the PPF Calculator
1. Choose a frequency of investment. Select monthly, quarterly, half-yearly, or yearly, based on how often you plan to deposit.
2. Enter the deposit amount. Enter the amount for each selected deposit. Total PPF deposits must remain between ₹500 and ₹1.5 lakh in a financial year.
3. Add your current PPF balance. If you already have a PPF account, enter its current balance. If you are opening a new account, leave it at ₹0.
4. Select the duration of investment. PPF has a standard maturity period of 15 financial years. The calculator can show longer projections; these assume that an eligible five-year extension is available and completed.
The calculator then displays total investment, estimated interest, and estimated maturity value. Total investment includes the current PPF balance and future contributions.
Why Deposit Timing Matters
For monthly interest calculation, the eligible balance is the lowest balance from the 5th to the last day of the month. For example, if an account has ₹10,000 on 1 April and ₹30,000 is deposited on 3 April, the eligible balance for April can be ₹40,000. If the ₹30,000 is deposited on 6 April, the eligible balance for April can remain ₹10,000.
Interest credited at the end of the financial year becomes part of the balance for future interest calculations.
Advantages of a PPF Calculator
Compare contribution plans. Test different contribution amounts and frequencies without changing your actual account.
See the role of an existing balance. Add a current PPF balance to estimate its continued growth alongside future deposits.
Plan for the maturity period. Compare a standard 15-year projection with longer projections that assume eligible extensions.
Understand the assumptions. The calculator makes its rate, deposit-timing, and projection assumptions visible so the result can be interpreted appropriately.
Support tax planning discussions. PPF contributions may be eligible for tax treatment under applicable law. Eligibility, limits, and the result depend on the taxpayer's circumstances and tax regime; this calculator does not provide tax advice.
Current PPF Interest Rate
The PPF interest rate is 7.1% per year for 1 July to 30 September 2026. Small-savings rates are reviewed quarterly. This page and calculator should be reviewed when the Government notifies a new rate.
Recent PPF Interest Rates
The table below shows recent notified PPF rates. The Government may revise the rate each quarter; periods not yet notified are deliberately left blank.
| Financial year | April–June | July–September | October–December | January–March |
|---|---|---|---|---|
| 2024–25 | 7.1% | 7.1% | 7.1% | 7.1% |
| 2025–26 | 7.1% | 7.1% | 7.1% | 7.1% |
| 2026–27 | 7.1% | 7.1% | Not notified at the time of review | Not notified at the time of review |
FAQs Related to PPF Calculator
How does the PPF calculator help?
It estimates a PPF maturity value from your deposit amount, frequency, current balance, and investment period. It also shows the total investment and estimated interest separately.
Is the PPF calculator free?
Yes. You can use it to compare different contribution amounts, frequencies, and investment periods.
How accurate is the PPF calculator?
It is an estimate based on the current notified rate and an on-or-before-the-5th deposit assumption. Actual results can differ if PPF rates, deposit timing, withdrawals, loans, or account status change.
What is the minimum and maximum PPF contribution?
The minimum deposit is ₹500 in a financial year and the maximum total deposit is ₹1.5 lakh in a financial year.
When should I deposit money to earn interest for that month?
Deposit on or before the 5th of the month. Interest is calculated on the lowest balance between the 5th and the last day of the month.
Can I use the calculator for more than 15 years?
Yes, but a projection longer than 15 years assumes that the account is extended in eligible five-year blocks. Check the applicable scheme rules before relying on an extension.
Sources: Department of Economic Affairs quarterly small-savings notifications; National Savings Institute Public Provident Fund Scheme rules; India Post PPF account information. This page is for general information and is not tax or investment advice.