FINBIZTOOLS
PPF Calculator
Project how a Public Provident Fund (PPF) balance could grow. Enter a yearly contribution, an assumed interest rate, the number of financial years, any opening balance and when in the year you deposit, to see the estimated interest and closing balance.
Private by design · Inputs and downloads stay in your browser
7.1% is an editable illustrative assumption; verify the current quarterly notification before production. Rate changes and withdrawals are not modeled. Projection length does not determine the legal account maturity date.
How to use the PPF Calculator
- Enter the annual contribution in multiples of ₹50, from ₹500 to ₹1,50,000.
- Enter the projection period in whole financial years.
- Enter the assumed annual interest rate. The default 7.1% is an editable illustration, not a rate promise.
- Enter any opening balance at the start of the first year.
- Choose whether you deposit on or before 5 April or on or before 5 March, then select Calculate.
What is PPF?
The Public Provident Fund is a long-term small-savings scheme run by the Government of India. Interest is credited annually, and the rate is notified by the government for each quarter, so it can change during the life of an account.
This calculator projects a constant assumed rate, so it shows a scenario. It does not predict future notified rates.
How the calculation works
PPF projection formula
Interest for the year = B × r + C × r × m ÷ 12
Closing balance = B + C + interest
The closing balance becomes next year's opening balance
- B is the opening balance for the year.
- C is the annual contribution and r is the annual rate as a decimal.
- m is the number of interest-earning months for the deposit: 12 for on or before 5 April, 1 for on or before 5 March.
The scheme's monthly lowest-balance convention is simplified to these two explicit deposit patterns. Interest is credited once a year at the constant rate you assume.
PPF calculation example
A ₹1,50,000 deposit on or before 5 April each year, for 15 financial years, from a zero opening balance, at an assumed constant 7.1%:
| Annual contribution | ₹1,50,000 |
|---|---|
| Projection period | 15 years |
| Assumed rate | 7.1% |
| Deposit timing | On/before 5 April |
| New contributions | ₹22,50,000 |
|---|---|
| Estimated interest | ₹18,18,209.22 |
| Projected closing balance | ₹40,68,209.22 |
In a single year the April deposit earns ₹10,650 of interest, while the same amount deposited on or before 5 March earns ₹887.50. An account provider may round credits differently.
Assumptions and limitations
Assumptions
- One deposit per financial year on one of the two dates you choose.
- A constant interest rate for the whole projection, credited annually.
- No withdrawals, loans, partial first year or change of account status.
Limitations and why results can differ
- Choosing 15 years does not decide your account's legal maturity date. The scheme's term runs from the end of the financial year of opening, and extensions have their own conditions.
- Deposits to linked minor accounts can affect the overall yearly cap.
- Check the notified rate and the current scheme rules with the National Savings Institute or your bank.
Frequently asked questions
Is the default interest rate guaranteed for 15 years?
No. It is an editable assumption. The notified PPF rate can change each quarter.
Does selecting 15 years determine my maturity date?
No. Actual maturity depends on the financial year in which the account was opened and any extension you choose.
Why does deposit timing matter?
Interest is based on the lowest balance in each month, so a deposit made by early April earns for more months in that year than one made in early March.
What is the maximum yearly contribution?
This calculator accepts ₹500 to ₹1,50,000 a year in multiples of ₹50. Confirm the current limits in the official scheme documents.
Methodology
Inputs are validated against the ranges in the calculator's rules data: contribution from ₹500 to ₹1,50,000 in multiples of ₹50, an assumed rate from 0% to 20% and a projection of 1 to 50 whole financial years. Those rules were last reviewed on 15 September 2026.
For each year the engine adds interest on the opening balance for the full year and interest on the contribution for 12 months or 1 month depending on the timing you choose, then adds the contribution and interest to form the closing balance. The default 7.1% is an illustrative assumption and is not looked up from any live source. The calculation runs in your browser and inputs are not sent to a server.
Sources and references
Last reviewed:
Disclaimer
Results are estimates based on the assumptions you enter and do not guarantee future returns. This page is for information only and is not financial, investment or tax advice. Read the full Disclaimer.
Explore this topic
This tool is part of Investing and Saving.
A common order: set a savings goal, project growth with regular or lump-sum investing, then adjust for inflation.