A Public Provident Fund (PPF) account is a long-term, government-backed savings option in India.
Its returns are tax-efficient, and the account benefits from annual compounding. This guide explains
PPF maturity amount calculation, including the interest rule, formula, and practical
monthly investment examples.
What Is the PPF Maturity Amount?
The PPF maturity amount is the total value available when the account completes its original
15-year tenure. It includes:
- Your total deposits made into the account
- Interest earned on those deposits
- Compounding benefits accumulated over the investment period
A PPF account matures after 15 completed financial years, counted from the end of
the financial year in which the account was opened. For example, if you open an account in
December 2026, the 15-year maturity period is counted from March 31, 2027.
PPF Rules That Affect Maturity Calculation
| PPF Feature | Current Rule |
|---|---|
| Minimum annual deposit | ₹500 |
| Maximum annual deposit | ₹1.5 lakh per financial year |
| Deposit frequency | One lump-sum deposit or up to 12 deposits in a financial year |
| Original lock-in period | 15 completed financial years |
| Interest calculation | Calculated monthly and credited at the end of the financial year |
| Tax treatment | EEE: deposits, interest, and maturity proceeds are generally tax-exempt, subject to applicable tax rules |
The PPF interest rate is set by the Government of India and may change every quarter. The examples
below use an illustrative annual rate of 7.1%. Your actual PPF maturity amount may
be higher or lower if the interest rate changes during the 15-year period.
How Is PPF Interest Calculated?
PPF interest is calculated every month on the lowest balance between the 5th day of the month
and the last day of that month. However, the accumulated interest is credited only once a year,
at the end of the financial year.
This is why the timing of your monthly deposit matters. To earn interest for a particular month, make
the contribution on or before the 5th of that month.
Monthly PPF Interest Formula
Monthly Interest = Lowest eligible balance × Annual PPF interest rate ÷ 12
For example, if your eligible PPF balance is ₹1,00,000 and the annual rate is 7.1%:
Monthly Interest = ₹1,00,000 × 7.1% ÷ 12 = approximately ₹591.67
The interest for all 12 months is added to the PPF balance at the end of the financial year, after
which it starts earning compound interest in subsequent years.
PPF Maturity Amount Calculation Formula
If you deposit the same amount once every year at the beginning of the financial year, you can use the
annuity-due formula as an estimate:
PPF Maturity Amount = P × [((1 + r)n − 1) ÷ r] × (1 + r)
- P = Annual PPF contribution
- r = Annual interest rate in decimal form
- n = Number of years invested
For monthly contributions, a single formula gives only an estimate because every deposit earns interest
for a different number of months. A deposit made in April earns more interest in that financial year
than a deposit made in March.
Monthly PPF Maturity Amount Calculation Method
For a more realistic monthly PPF maturity amount calculation, follow this approach:
- Decide your monthly contribution amount.
- Ensure that the total contribution does not exceed ₹1.5 lakh in a financial year.
- Deposit the amount on or before the 5th of every month.
- Calculate each month’s interest based on the eligible balance.
- Add the yearly interest to the account at the end of the financial year.
- Repeat the process for 15 completed financial years.
For planning purposes, you may assume that deposits are made before the 5th of each month and that the
interest rate remains unchanged. This produces a useful estimate, although the actual amount will vary
if PPF rates are revised.
Example 1: PPF Maturity Amount for ₹5,000 Per Month
Suppose you invest ₹5,000 every month before the 5th. Your yearly contribution will be:
₹5,000 × 12 = ₹60,000 per year
| Detail | Amount / Assumption |
|---|---|
| Monthly investment | ₹5,000 |
| Annual investment | ₹60,000 |
| Investment period | 15 years |
| Illustrative PPF rate | 7.1% per year |
| Total amount deposited | ₹9,00,000 |
| Estimated maturity value | Approximately ₹15.78 lakh |
| Estimated interest earned | Approximately ₹6.78 lakh |
In this example, a ₹5,000 monthly PPF contribution can grow to around ₹15.78 lakh at maturity if the
interest rate remains at 7.1% throughout the term and deposits are made before the 5th each month.
Example 2: PPF Maturity Amount for ₹10,000 Per Month
Now assume you invest ₹10,000 per month, or ₹1.2 lakh per year. This remains within the annual PPF
investment limit of ₹1.5 lakh.
| Detail | Amount / Assumption |
|---|---|
| Monthly investment | ₹10,000 |
| Annual investment | ₹1,20,000 |
| Investment period | 15 years |
| Illustrative PPF rate | 7.1% per year |
| Total amount deposited | ₹18,00,000 |
| Estimated maturity value | Approximately ₹31.56 lakh |
| Estimated interest earned | Approximately ₹13.56 lakh |
A monthly contribution of ₹10,000 can potentially build a corpus of about ₹31.56 lakh after 15 years,
based on the illustrative 7.1% interest rate.
Example 3: Maximum Monthly PPF Contribution of ₹12,500
The annual PPF contribution limit is ₹1.5 lakh. Therefore, the maximum equal monthly contribution is:
₹1,50,000 ÷ 12 = ₹12,500 per month
| Detail | Amount / Assumption |
|---|---|
| Monthly investment | ₹12,500 |
| Annual investment | ₹1,50,000 |
| Investment period | 15 years |
| Illustrative PPF rate | 7.1% per year |
| Total amount deposited | ₹22,50,000 |
| Estimated maturity value | Approximately ₹39.45 lakh |
| Estimated interest earned | Approximately ₹16.95 lakh |
If you invest the maximum permitted amount of ₹12,500 every month before the 5th, the estimated
PPF maturity amount can be around ₹39.45 lakh after 15 years, assuming a constant 7.1% rate.
PPF Monthly Investment Maturity Table
| Monthly Contribution | Annual Contribution | Total Deposits in 15 Years | Estimated Maturity Amount at 7.1% | Estimated Interest Earned |
|---|---|---|---|---|
| ₹2,000 | ₹24,000 | ₹3,60,000 | Approximately ₹6.31 lakh | Approximately ₹2.71 lakh |
| ₹5,000 | ₹60,000 | ₹9,00,000 | Approximately ₹15.78 lakh | Approximately ₹6.78 lakh |
| ₹8,000 | ₹96,000 | ₹14,40,000 | Approximately ₹25.25 lakh | Approximately ₹10.85 lakh |
| ₹10,000 | ₹1,20,000 | ₹18,00,000 | Approximately ₹31.56 lakh | Approximately ₹13.56 lakh |
| ₹12,500 | ₹1,50,000 | ₹22,50,000 | Approximately ₹39.45 lakh | Approximately ₹16.95 lakh |
These figures are estimates only. They assume deposits are made before the 5th of every month and that
the PPF rate stays at 7.1% for the entire 15-year tenure.
Monthly Deposit vs Lump-Sum Deposit: Which Gives More PPF Interest?
A lump-sum deposit at the beginning of the financial year generally earns more interest than equal
monthly deposits. This happens because the full amount remains invested for a longer period.
| Deposit Method | Interest Advantage | Suitable For |
|---|---|---|
| ₹1.5 lakh lump sum in April | Receives interest for almost the entire financial year | Investors with surplus funds available early |
| ₹12,500 monthly before the 5th | Builds the corpus gradually; later monthly deposits earn interest for fewer months | Salaried investors with monthly cash flow |
If possible, deposit your annual PPF amount between April 1 and April 5. If a lump-sum contribution is
not practical, monthly deposits before the 5th are still a disciplined and effective strategy.
How to Increase Your PPF Maturity Amount
- Deposit early: Make contributions on or before the 5th of each month.
- Invest at the start of the financial year: An early lump-sum deposit receives interest for more months.
- Use the full annual limit: Invest up to ₹1.5 lakh annually if it suits your financial plan.
- Continue after maturity: After 15 years, you can extend the account in blocks of five years, with or without fresh contributions.
- Avoid premature withdrawals: Leaving the money invested allows compounding to work for longer.
Important Limitations of PPF Maturity Calculators
An online PPF calculator can provide a quick estimate, but it cannot predict the exact maturity amount
years in advance because:
- The PPF interest rate can change every quarter.
- Your actual deposit dates may differ from the assumed dates.
- You may increase, reduce, or skip contributions in future years.
- Extensions after the initial maturity period can substantially change the final corpus.
Use a calculator for planning, but check your PPF passbook or bank/post-office statement for the
authoritative account balance.
Frequently Asked Questions About PPF Maturity Amount Calculation
How much will I get after 15 years in PPF?
The amount depends on your contribution amount, deposit timing, and the PPF interest rates applicable
over the 15-year period. For example, investing ₹12,500 monthly at an assumed 7.1% rate may create an
estimated corpus of about ₹39.45 lakh.
Can I deposit ₹12,500 every month in PPF?
Yes. ₹12,500 per month equals ₹1.5 lakh per year, which is the maximum permitted annual PPF
contribution under the current rules.
What is the best date to deposit money in PPF?
Deposit before the 5th of the month to earn interest for that month. For a yearly lump sum, depositing
between April 1 and April 5 usually maximizes the interest earned for that financial year.
Is PPF interest taxable?
PPF is generally treated as an Exempt-Exempt-Exempt investment. Eligible deposits may qualify for a
deduction under Section 80C within the applicable overall limit, while interest and maturity proceeds
are generally tax-exempt under prevailing tax rules.
Can I extend my PPF account after 15 years?
Yes. You may close the account at maturity or extend it in blocks of five years. An extension can be
made with fresh contributions or without fresh contributions, subject to applicable PPF rules.
Conclusion
A reliable PPF maturity amount calculation starts with three factors: your contribution
amount, deposit timing, and the interest rate over the investment period. Monthly investments are ideal
for disciplined savers, while an early financial-year lump sum can generate slightly higher interest.
If you invest ₹12,500 per month before the 5th and the illustrative 7.1% interest rate remains
unchanged, you may build an estimated PPF corpus of around ₹39.45 lakh in 15 years. Review the official
PPF interest rate periodically and adjust your investment plan as needed.
Disclaimer: This article is for educational purposes only. PPF rules, interest rates, tax treatment,
and investment limits may change. Verify current rules with an authorized bank, post office, or
qualified financial adviser before making investment decisions.
