Free PPF Calculator: 15-Year Maturity Value
Calculate PPF maturity free. How the deposit date quietly changes your returns, and why timing matters.
PPF is one of the few genuinely predictable long-term instruments available in India — government-backed, tax-free at maturity, with a fixed lock-in. That predictability makes a calculator far more meaningful here than for market-linked products, because the projection is close to what you will actually receive rather than a hopeful estimate.
Why a free PPF calculator matters more in India
There is one detail that most PPF calculators quietly ignore and that costs people real money: interest is computed on the lowest balance between the fifth and the last day of each month. Deposit on the fourth and that month's contribution earns interest; deposit on the sixth and it earns nothing for that month. Over a fifteen-year term, consistently depositing before the fifth of April rather than late in the financial year produces a noticeably larger corpus for identical contributions.
The best free options compared
At a glance
Of the 4 options below, 4 are fully free with no paid tier to upgrade to, and 0 offer a free tier alongside paid plans. That distinction matters more than it first appears: a fully free tool cannot restrict you later, whereas a free tier is a commercial decision that can be revised.
| Tool | Cost | Best for |
|---|---|---|
| India Post / bank PPF calculators | Fully free | Since PPF is a government scheme administered through post offices and authorised… |
| A spreadsheet | Fully free | most instructive option, because building it forces you to model the… |
| ClearTax / Groww PPF calculators | Fully free | Clean interfaces with clear year-by-year breakdowns |
| Official scheme rules | Fully free | Not a calculator, but the authoritative source for the current interest rate, which is… |
Each option in detail
India Post / bank PPF calculators
✓ FREESince PPF is a government scheme administered through post offices and authorised banks, their own calculators are the natural reference. Straightforward and free of any product-selling motive.
A spreadsheet
✓ FREEThe most instructive option, because building it forces you to model the monthly-minimum-balance rule explicitly. Once built, you can compare depositing in April against depositing in March and see the difference in rupees, which is the calculation that actually changes behaviour.
ClearTax / Groww PPF calculators
✓ FREEClean interfaces with clear year-by-year breakdowns. Convenient for a quick figure. Most assume idealised annual deposits and do not model deposit timing.
Official scheme rules
✓ FREENot a calculator, but the authoritative source for the current interest rate, which is revised quarterly by the government. Any calculator using a stale rate produces a wrong answer, so check the current figure before relying on output.
Note on free tiers: limits and features change often. Everything here was checked in July 2026, but confirm current terms on the provider's own site before committing to a workflow. Official guidance: Income Tax Department GST Portal.
How to choose the right one
Use any calculator for the headline maturity figure, but verify the interest rate it is applying against the current notified rate, since it changes quarterly. If you want the calculation to actually improve your outcome, build a spreadsheet that models the fifth-of-the-month rule and compare depositing early in the financial year against late. That comparison is the one piece of PPF analysis worth doing.
If you are assembling a wider free toolkit, these related guides cover adjacent problems: Free SIP Calculator: Project Mutual Fund Returns, Free Income Tax Calculator India (Old vs New), Free GST Calculator: CGST, SGST and IGST.
Verdict
Any reputable calculator gives the right maturity figure provided the interest rate is current. The insight worth acting on is timing: deposit your annual contribution in early April rather than March, and consistently before the fifth of any month, and you earn meaningfully more over fifteen years for exactly the same outlay.
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See all Finance & Tax Calculators →Frequently asked questions
How is PPF interest calculated?
On the lowest balance between the fifth and the last day of each month, compounded annually. This is why deposits made after the fifth earn no interest for that month, and why deposit timing measurably affects your final corpus.
What is the current PPF interest rate?
The government revises it quarterly, so verify the current rate on the India Post or your bank's official page rather than relying on a figure hard-coded into a calculator.
Is PPF maturity amount taxable?
PPF falls under the exempt-exempt-exempt category — contributions qualify for deduction, interest accrues tax-free and maturity proceeds are tax-free. Confirm current provisions, as tax rules do change.
Can I extend PPF after 15 years?
Yes, in blocks of five years, with or without further contributions. Extending with contributions continues compounding on an already substantial balance, which is often the most efficient phase of the account.