Total deposited, interest earned, and the closing balance at the end of each year, with annual compounding.
Year
Deposited
Interest
Balance
1
1,50,000
10,650
1,60,650
2
3,00,000
32,706
3,32,706
3
4,50,000
66,978
5,16,978
4
6,00,000
1,14,334
7,14,334
5
7,50,000
1,75,701
9,25,701
6
9,00,000
2,52,076
11,52,076
7
10,50,000
3,44,524
13,94,524
8
12,00,000
4,54,185
16,54,185
9
13,50,000
5,82,282
19,32,282
10
15,00,000
7,30,124
22,30,124
11
16,50,000
8,99,113
25,49,113
12
18,00,000
10,90,750
28,90,750
13
19,50,000
13,06,643
32,56,643
14
21,00,000
15,48,515
36,48,515
15
22,50,000
18,18,209
40,68,209
Estimates only — not financial, tax, or professional advice.
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What it calculates: Maturity Value, Total Deposited, Total Interest Earned.
Updated 5 June 2026 · Transparent assumptions
One interest credit a year is what makes PPF behave differently
PPF interest is calculated monthly on the lowest balance between the 5th and the last day of the month, but it is credited only once, at the end of the financial year. The calculator models that as a single annual compounding step: the year’s deposit goes in, and the whole balance grows once.
The practical consequence is a deposit deadline rather than a deposit habit. Money paid in on the 4th of April earns interest for the full year; the same money paid on the 6th earns nothing for that month. Over fifteen years, consistently depositing late costs roughly a month of interest every year.
The limit is per financial year, and it does not carry forward
PPF accepts a maximum of ₹1.5 lakh per financial year across all accounts you hold, with a minimum of ₹500 to keep the account active. An unused allowance is simply gone — there is no mechanism to deposit more later to make up a year you skipped.
That makes the maximum realistic corpus a known quantity from the start. Anyone modelling a larger figure here is modelling something the scheme will not accept, which is worth checking before the number becomes a plan.
The tax treatment is doing more work than the rate
PPF sits in the exempt-exempt-exempt category: the deposit qualifies under section 80C, the interest accrues untaxed, and the maturity amount is tax-free. A taxable deposit paying the same headline rate is therefore worth materially less to anyone in a higher bracket.
This is the honest case for PPF, and it is a tax case rather than a returns case. Compared on a pre-tax basis against equity it looks unremarkable; compared after tax against other fixed-income options for a high-bracket taxpayer, it is competitive.
A fifteen-year projection at one fixed rate is a simplification
The Government of India notifies the PPF rate every quarter, and it has ranged from 12% in the 1980s to 7.1% in recent years. The calculator holds whatever rate you enter constant for the whole tenure, which no fifteen-year period has ever actually done.
Treat the output as a scenario rather than a forecast. Running it twice — once a point above your rate and once a point below — brackets the outcome far more usefully than a single precise-looking figure does.
Sources & References
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
Results are estimates based on the figures you enter and standard formulas. Rates, fees, taxes, and lender terms vary and change over time, so confirm important numbers with your lender or a qualified professional. This is educational information, not financial advice.
Published the calculator with its formula, worked example, assumptions, limitations and a bespoke guide, and added an automated formula test suite covering it.
Tested the annual compounding schedule against a year-by-year hand calculation, and checked that total interest is always maturity less the deposits made.
Tested that a zero rate returns exactly the sum deposited, and that maturity rises monotonically with both the rate and the tenure.
Show it to your clients, not just tell them
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