The Public Provident Fund (PPF) is the premier sovereign-backed, fixed-income long-term wealth accumulation vehicle in India. Governed by the Public Provident Fund Scheme under the Government Savings Promotion Act, PPF is one of the few financial instruments carrying statutory Exempt-Exempt-Exempt (EEE) tax status. The PPF Calculator models year-by-year balance progression over the mandatory 15-year tenure, simulates infinite 5-year block extensions (with or without further contributions), computes interest compounding rules, and determines partial withdrawal and loan limits.
The Critical 5th-of-the-Month Interest Calculation Rule
Understanding the monthly interest mechanics of the PPF is essential to maximize your returns. While PPF interest compounds annually on March 31st, it is calculated monthly based on a statutory balance rule:
Statutory PPF Monthly Balance Rule
Monthly Interest = Lowest Balance between close of 5th day and end of month × (Annual Rate / 12)
Crucial Takeaway: If you deposit your PPF contribution on or before the 5th day of the month, you earn interest on that deposit for that entire month. If you deposit on the 6th day or later, you lose that month’s interest on the newly deposited amount.
The Power of EEE Tax Status and Long-Term Extensions
PPF offers unmatched tax efficiency under the Indian Income Tax Act:
- Exempt at Investment: Contributions up to ₹1,50,000 per financial year qualify for deduction under Section 80C.
- Exempt at Accrual: Annual interest credited to the PPF account on March 31st is completely exempt from income tax and wealth tax.
- Exempt at Maturity: The entire maturity corpus withdrawn after 15 years (or subsequent extension blocks) is 100% tax-exempt.
The 5-Year Block Extension Architecture
Upon completing the mandatory 15-year term, an investor can choose from three paths:
- Complete Closure: Withdraw the entire corpus tax-exempt.
- Extension with Contributions: Submit Form H within one year of maturity to extend the account in 5-year blocks. You continue depositing up to ₹1,50,000 annually and earning tax-exempt interest. You can extend indefinitely (e.g., 20, 25, 30 years). Up to 60% of the balance at the start of each 5-year block can be withdrawn during the block.
- Extension without Contributions: The account remains open automatically without fresh deposits, continuing to earn the sovereign PPF interest rate on the entire accumulated balance indefinitely, with one withdrawal permitted per financial year.
Wealth Accumulation: Max ₹1.5 Lakh/Year at 7.1% Sovereign Rate
| Tenure Milestone | Total Amount Deposited | Total Interest Earned | Total Tax-Exempt Corpus |
|---|---|---|---|
| 15 Years (Maturity) | ₹22,50,000 | ₹18,18,209 | ₹40,68,209 |
| 20 Years (1st Extension) | ₹30,00,000 | ₹36,58,288 | ₹66,58,288 |
| 25 Years (2nd Extension) | ₹37,50,000 | ₹65,58,015 | ₹1,03,08,015 (₹1.03 Cr) |
| 30 Years (3rd Extension) | ₹45,00,000 | ₹1,09,47,845 | ₹1,54,47,845 (₹1.54 Cr) |
Frequently Asked Questions About PPF Accounts
When can I take a loan or partial withdrawal from my PPF?
A loan can be availed from the 3rd financial year up to the 6th financial year (capped at 25% of the balance at the end of the second preceding financial year). Partial withdrawals are permitted from the 7th financial year onwards, capped at 50% of the balance at the end of the 4th preceding year or the immediately preceding year, whichever is lower.
Can PPF balance be attached by a court decree for debt recovery?
No. Under Section 15 of the Government Savings Banks Act, a PPF account balance cannot be attached by any court decree or order in respect of any debt or liability incurred by the account holder, making it a completely secure sovereign asset.
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