This page estimates the maturity value of a Public Provident Fund account from a yearly investment, an annual interest rate, and a tenure that starts at 15 years and extends in optional 5-year blocks. The yearly deposit is clamped to the statutory window of ₹500 to ₹1,50,000. Interest is compounded once a year, and each year’s deposit is treated as invested at the start of that year — the usual public illustration, not a month-by-month reconstruction of the “lowest balance between the 5th and the month-end” rule. Everything runs in this browser tab. FlashKit does not open a PPF account, does not talk to a bank or India Post, and does not file an ITR.
The year-by-year identity is closing = (opening + deposit) × (1 + r), with r = annual percent / 100. After 15 deposits that is the future value of an annuity-due: FV = PMT × ((1+r)^n − 1) / r × (1+r). Worked example that matches the default fields: ₹1,50,000 every year for 15 years at 7.1%. Total invested is ₹22,50,000. The formula prints a maturity of about ₹40,68,209 (this engine’s exact IEEE value is within a thousand rupees of that commonly published figure; paise rounding at a bank can move the last row). Interest earned is the gap between maturity and cash invested. A 20-year run is the same loop with five extra deposits after you extend.
The default 7.1% is the rate many public PPF illustrations still use. The Government of India notifies small-savings rates every quarter; the rate on a live account can change during the 15-year life. Edit the rate box if you want a stress test or a newly notified number. This page does not fetch the latest circular. Official PPF interest is calculated monthly on the lowest balance between the 5th and the last day of the month and credited once a year — if you deposit after the 5th, that month may earn nothing. Putting the whole yearly amount on or before 5 April is the habit that makes the annual-compounding illustration closest to a real passbook.
Tax words on this page are labels, not advice. PPF is commonly described as EEE: the deposit may be claimed under Section 80C in the old income-tax regime (shared with the ₹1.5 lakh cap), the interest is often exempt, and the maturity is often exempt — subject to the Income-tax Act as it stands in the year you file, and subject to how you actually hold the account. The new regime treats 80C differently. Confirm with a chartered accountant and the Income Tax Department. FlashKit is not a tax preparer. Use the income-tax calculator to compare old vs new slabs on a salary, the FD calculator for a taxable bank deposit, the SIP calculator for a market-linked what-if, and the EMI calculator when the same rupee is a loan installment.
The controls above match this copy. Yearly investment defaults to 1,50,000 and is clamped if you type outside ₹500–₹1,50,000. Annual rate defaults to 7.1% and stays editable. Tenure is a 15-year lock-in plus optional 5-year extensions (20, 25, 30, 35, 40). Copy summary states that EEE and 80C depend on the law for that year. The year-by-year table shows opening, deposit, interest, closing, and invested-so-far. State lives in this tab only.
How to estimate a PPF corpus
- Enter the yearly investment in rupees (for example 150000). The math clamps amounts below ₹500 or above ₹1,50,000.
- Enter the annual rate. The 7.1% default is a public-illustration starting point; official rates are notified quarterly — edit it if the circular changed.
- Pick 15 years or a 5-year extension block. The initial lock-in is 15 years.
- Read maturity value, total invested, and total interest. Scroll the year-by-year table.
- Copy summary if you need the figures elsewhere. Treat them as an illustration, then confirm the passbook and tax with a CA.
Key Features
- Annual compounding with the deposit treated as start-of-year
- Statutory ₹500–₹1,50,000 yearly window enforced in the math
- Default 7.1% rate, editable; quarterly-revision note on the form
- 15-year lock-in plus 5-year extension tenures and a year-wise table
- Local only — EEE/80C wording is not tax advice
How the PPF math works (and what it skips)
- Each year adds the deposit, then applies r once. That is annuity-due annual compounding, not monthly NAV math and not a bank FD quarterly formula.
- The official monthly lowest-balance rule is not simulated day by day. Deposit on or before the 5th if you want a passbook to resemble this table.
- A changing notified rate during the 15 years is not modelled as a path. Re-run with a lower rate if you want a conservative stack.
- Loan against PPF, partial withdrawal after year 7, and extension-with-or-without-contribution rules are not fields here.
- Paise rounding at the bank can move the last rupee. Use this page to rank scenarios, not to print a closure cheque.
PPF vs FD vs SIP vs EMI
- PPF: long lock-in, yearly cap, government rate, often EEE / 80C in the old regime. Poor emergency liquidity in the first years.
- FD: lump-sum contractual coupon, usually taxable interest, tenure you choose. Open the FD calculator for quarterly compound math.
- SIP: assumed market return, no cap like PPF’s ₹1.5 lakh, units can fall. Open the SIP calculator; do not treat 12% as a PPF substitute.
- EMI: money you owe, not money you invest. A home-loan 80C principal claim is a different box from a PPF deposit. Use the EMI and income-tax calculators.
- Related guides: 5-year/10-year SIP, EMI vs SIP, home-loan EMI, personal-loan EMI. Those pages compare formulas — they are not instructions to extend PPF or to prepay a loan.
Tips and honest limits
- Do not treat the default 7.1% as a forever rate. Change it when the quarterly notification moves.
- If you already deposited ₹1,50,000 this year, extra typing here will not create a legal contribution. The clamp is arithmetic, not a bank rejection slip.
- Section 80C is a shared cap. ELSS, life insurance, and home-loan principal compete with PPF in the old regime. Confirm with a CA.
- Related tools: FD calculator, SIP calculator, EMI calculator, income-tax calculator, HRA calculator, in-hand salary calculator, GST calculator.
- Copy the summary before you refresh. Nothing is saved. This is not personalised tax, investment, or deposit advice.
Frequently Asked Questions
What is the minimum and maximum PPF deposit per year?
This page enforces ₹500 to ₹1,50,000 per year, which is the usual statutory window. Amounts outside that range are clamped for the estimate. A live account can reject a deposit that breaks the cap — confirm with the bank or post office.
What PPF formula does FlashKit use?
Annual compounding, deposit at the start of each year: closing = (opening + deposit) × (1 + r). Example: ₹1,50,000 a year at 7.1% for 15 years is about ₹40,68,209. Official interest uses a monthly lowest-balance rule that this table does not replay day by day.
Is PPF EEE and eligible for Section 80C?
PPF is commonly described as exempt-exempt-exempt, and the deposit is often claimed under Section 80C in the old regime within the shared ₹1.5 lakh cap. The new regime treats 80C differently. That is a label, not advice. Confirm with a CA and the law for the year you file.
Why is the rate editable if PPF is government-notified?
Rates are revised quarterly. The 7.1% default is a public-illustration starting point, not a live fetch of the latest circular. Edit it when the notification changes or when you want a conservative stress test.
Can I extend PPF after 15 years?
The form offers 5-year extension blocks (20, 25, 30, 35, 40 years) as a what-if on the same annual formula. Extension-with-contribution versus without-contribution, and the paperwork your bank wants, are not modelled. Ask the issuer.
Is my PPF amount uploaded?
No. Calculation stays in this tab. Close the page to drop the inputs. This is not personalised tax or investment advice.
