PPF Calculator: Maturity for Monthly or Yearly Deposits

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This PPF calculator estimates what your Public Provident Fund account will hold after 15 years, at 7.1%, the rate for this quarter, with interest compounding yearly, for the deposit pattern you choose. Enter what you plan to pay in and the tool projects the closing balance.

The result is an estimate. The real figure will differ if the rate changes in a later quarter, which it can do every three months. Use it to compare deposit habits, not as a promise. For eligibility and limits, read our PPF account guide.

At a glance

Rate used
7.1% a year, the rate for October to December
Compounding
Yearly, credited on 31 March
Term
15 financial years, plus optional 5 year blocks
Deposit range
500 rupees to 1.5 lakh rupees a year
Assumes
Each deposit is made by the 5th of the month
Tax on result
Maturity amount is fully exempt

How the PPF calculator works out the figure

The tool follows the scheme's own method. Each month it picks the smallest balance seen after the 5th day, computes a month of interest on that, and keeps the twelve amounts aside. On 31 March they are added to the balance. The next year starts from that bigger balance.

For one deposit at the start of every year, this works out to a simple formula: Maturity = P × [((1 + i) to the power n, minus 1) ÷ i] × (1 + i), where P is the yearly deposit, i is the rate as a decimal and n is the number of years. For monthly deposits the tool adds interest month by month, so each payment earns only for the months it stays in the account that year.

Sample PPF results for common deposits

15 year PPF results at 7.1%, deposits paid on or before the 5th
Deposit pattern	You pay in	Maturity value (about)
1,000 rupees a month	1.8 lakh	3.16 lakh
2,000 rupees a month	3.6 lakh	6.31 lakh
5,000 rupees a month	9 lakh	15.78 lakh
50,000 rupees once a year	7.5 lakh	13.56 lakh
1 lakh rupees once a year	15 lakh	27.12 lakh
1.5 lakh rupees once a year	22.5 lakh	40.68 lakh

These figures assume the rate stays where it is for all 15 years. If it rises or falls, the final number moves with it.

Monthly or yearly deposits: why the result differs

Take two savers who each put 1.5 lakh rupees a year into PPF. One pays the full amount before 5 April. Saver B splits it into 12,500 rupees paid by the 5th of each month. Going by today's rate, saver A finishes with about 40.68 lakh and saver B with about 39.45 lakh. The gap of over 1.2 lakh comes only from timing: the April lump sum earns interest for all twelve months of every year.

Monthly saving still makes sense on a monthly salary; the trick is to deposit by the 5th every time.

Year by year growth of 1.5 lakh a year

End of year	Total paid in	Balance at the current rate (about)
1	1.5 lakh	1.61 lakh
5	7.5 lakh	9.26 lakh
10	15 lakh	22.30 lakh
15	22.5 lakh	40.68 lakh

Notice that more interest is earned in the last five years than in the first ten. Long accounts reward patience, which is why the extension option matters.

What happens if you extend after 15 years

At maturity you can extend the account in blocks of five years. Using the 1.5 lakh a year example and the current rate:

Extend without new deposits: the 40.68 lakh keeps compounding and becomes about 57.33 lakh after five more years.
Extend with 1.5 lakh a year: the balance reaches about 66.58 lakh after 20 years in total, and about 1.03 crore after 25 years.

To extend with deposits, Form 4 has to reach the office within a year of maturity. The rules for each choice are explained on the PPF withdrawal rules page.

Reading the result of a PPF interest rate calculator

Rate: the calculator uses 7.1% for every year. The government reviews it each quarter; see PPF interest rate.
Deposit date: paying after the 5th loses that month's interest on the new money.
Missed years: a year below 500 rupees makes the account discontinued until the arrears plus 50 rupees per missed year are paid.
Loans and withdrawals: any amount taken out stops compounding, so the real maturity falls.
Ceiling: do not enter more than 1.5 lakh a year, because extra deposits earn nothing and are refunded.

Frequently asked questions

How is PPF interest calculated?

Interest is computed monthly on the smallest balance after the 5th day, then added once a year on 31 March. The credited interest earns interest in later years.

What will 1.5 lakh a year in PPF become after 15 years?

With 7.1% holding steady, roughly 40.68 lakh rupees if each deposit is made before 5 April. The total you pay in is 22.5 lakh.

Does a post office PPF scheme 15 years calculator differ from what a bank shows?

No. The scheme rules and the rate are the same at post offices and banks, so the calculation is the same.

Does the PPF calculator monthly option give a lower result?

Usually yes, by a small amount, because money paid later in the year earns interest for fewer months. Depositing by the 5th every month keeps the gap small.

Can the calculator show the exact maturity amount?

No tool can, because the rate may change in future quarters. Treat the result as a guide and check the passbook each year.

How do I see the interest part in this PPF calculator online?

It works as a PPF interest calculator and a PPF return calculator at once. Take the maturity value it gives and subtract the total you paid in; what is left is the interest earned, all of it tax free.

Is the PPF maturity amount taxable?

No. The interest and the maturity payout are exempt from income tax.

Official sources

India Post: Public Provident Fund Scheme notificationwww.indiapost.gov.in
India Post: savings schemes and current rateswww.indiapost.gov.in

Rules, amounts and portals can change. Check the official source before you apply or deposit.

PPF calculator: estimate your maturity amount