How Public Provident Fund (PPF) Interest is Calculated
The Public Provident Fund (PPF) is governed by the Government Savings Promotion General Rules and the Public Provident Fund Scheme, 2019. The interest rate is reviewed and notified quarterly by the Ministry of Finance, Government of India. Interest is calculated on a monthly basis but credited to the account once annually at the end of each financial year on March 31st.
Yearly Start-of-Year Deposit: Closing Balance = (Opening Balance + Annual Deposit) × (1 + r)
Monthly Mode: Annual Interest = (Opening Balance × r) + ∑k=112 [ Monthly Deposit × r × (Months Remaining / 12) ]
Monthly Mode: Annual Interest = (Opening Balance × r) + ∑k=112 [ Monthly Deposit × r × (Months Remaining / 12) ]
The "Deposit on or Before the 5th of April" Wealth Rule
By statutory government regulation, monthly PPF interest is calculated strictly on the minimum balance between the close of the 5th day and the end of the calendar month. This rule creates a significant financial impact depending on your deposit timing:
- Lump sum before April 5th: If you deposit the full ₹1,50,000 between April 1st and April 5th, your entire deposit earns interest for all 12 months of the financial year. At 7.1%, it earns
₹1,50,000 × 7.1% = ₹10,650in interest in Year 1. - Monthly deposits before the 5th: If you deposit ₹12,500 every month on or before the 5th, you earn
₹5,769in Year 1 interest. - Depositing after the 5th: If you deposit after the 5th of any month, that money earns zero interest for that calendar month. Depositing ₹1,50,000 after April 5th costs you an immediate
₹887.50in lost interest in Year 1, compounding into tens of thousands of rupees over a 15-year horizon.
Is PPF Interest Taxable? (The EEE Advantage)
PPF is one of the few investment vehicles in India that enjoys the prestigious Exempt-Exempt-Exempt (EEE) tax status:
- Exempt at Investment: Deposits up to ₹1,50,000 per financial year qualify for a tax deduction under Section 80C of the Income Tax Act (Old Tax Regime).
- Exempt during Accrual: Annual interest credited on March 31st is 100% tax-free under Section 10(11). No TDS is ever deducted.
- Exempt at Maturity: The entire accumulated corpus withdrawn at maturity is completely tax-free and does not need to be declared as taxable income.
PPF Extension Rules (5-Year Blocks)
A PPF account matures after 15 full financial years from the end of the financial year in which the initial deposit was made (effectively 16 calendar years). Upon completion of this term, subscribers have three choices:
- 1. Complete Withdrawal & Closure: Withdraw the entire tax-free corpus and close the account.
- 2. Extension with Further Contributions: Extend the account in blocks of 5 years with continued annual deposits. To activate this, you must submit Form 16-H (or Form H) to your bank/post office within 1 year from the date of maturity. Failing to submit Form 16-H means any fresh deposits will earn zero interest and will not qualify for 80C tax deductions.
- 3. Extension without Further Contributions: If no form is submitted within 1 year, the account automatically extends in 5-year blocks without fresh deposits. Your existing maturity corpus continues compounding tax-free at the prevailing government PPF rate indefinitely, and you are permitted to make one partial withdrawal per financial year of any amount.
Partial Withdrawal & Loan Rules
- Loan Facility (Years 3 to 6): Available from the 3rd financial year up to the end of the 6th financial year. The maximum loan amount is 25% of the credit balance standing at the end of the second financial year immediately preceding the year of application. The interest rate on the loan is 1% per annum above the prevailing PPF rate.
- Partial Withdrawal (Year 7 onwards): Starting from the 7th financial year, one partial withdrawal is permitted per financial year. The withdrawal limit is capped at 50% of the balance at the end of the 4th preceding year or the preceding year, whichever is lower.
PPF vs. ELSS Mutual Funds vs. Bank Fixed Deposit
| Feature | PPF | ELSS Mutual Fund | Tax-Saving 5-Yr FD |
|---|---|---|---|
| Safety / Capital Guarantee | 100% Sovereign Guarantee (Govt of India) | Market-linked (Equity risk) | Bank guarantee (DICGC insured to ₹5L) |
| Lock-in Period | 15 Years (Partial withdrawals after 6 yrs) | 3 Years (Shortest among 80C) | 5 Years (Strict lock-in) |
| Returns | 7.1% (Govt reviewed quarterly) | 12% – 15% (Historical equity average) | 6.5% – 7.2% |
| Tax on Interest / Gains | 100% Tax-Free (EEE Status) | LTCG taxed at 12.5% above ₹1.25 Lakh | Fully taxable at your slab rate |
| Max Investment Limit | ₹1,50,000 per financial year | No upper ceiling (80C capped at ₹1.5L) | ₹1,50,000 for 80C exemption |
4 Common Things People Get Wrong About PPF
- Myth 1: "Opening an account for my minor child gives another ₹1.5 Lakh limit." False. The ₹1,50,000 annual limit applies clubbed to the parent and minor child combined. Any excess deposit across both accounts combined earns zero interest and is returned without tax benefits.
- Myth 2: "I can deposit money after 15 years without informing the bank." False. If you wish to extend with contributions, you must submit Form 16-H within one year of maturity. Deposits made without submitting Form 16-H are treated as irregular, earning no interest and yielding no 80C deduction.
- Myth 3: "PPF interest rate is fixed for 15 years." False. Unlike a fixed deposit where the rate is locked at booking, PPF has a floating interest rate reset quarterly by the Ministry of Finance.
- Myth 4: "NRIs can open a new PPF account." False. Non-Resident Indians (NRIs) cannot open fresh PPF accounts. However, if an account was opened before gaining NRI status, it can continue until the completion of the 15-year maturity on a non-repatriable basis.
Frequently Asked Questions (FAQs)
Is interest earned on a PPF account taxable?
No. PPF enjoys complete Exempt-Exempt-Exempt (EEE) tax status in India. Contributions qualify for deduction under Section 80C (up to ₹1.5 Lakh per year), annual interest earned is fully exempt under Section 10(11), and the final maturity amount is completely tax-free.
Why should I deposit money in my PPF before the 5th of the month?
By law, monthly PPF interest is calculated on the lowest balance between the close of the 5th day and the end of the month. Depositing by the 5th ensures you earn interest for that entire calendar month; depositing after the 5th means that installment earns zero interest for that month.
Can I extend my PPF account after the 15-year maturity period?
Yes. Upon completing the initial 15-year lock-in, you can extend your account in blocks of 5 years indefinitely. You can choose to extend with continued contributions (by submitting Form 16-H within 1 year of maturity) or without contributions, where your existing corpus continues compounding tax-free.
What is the maximum and minimum deposit limit in a PPF account?
The minimum mandatory deposit is ₹500 per financial year, and the maximum ceiling is ₹1,50,000 per financial year across all PPF accounts held by an individual (including accounts opened on behalf of a minor child).
Can I take a loan or make partial withdrawals from my PPF?
Yes. A loan facility is available between the 3rd and 6th financial year up to 25% of the balance at the end of the second preceding year. Partial withdrawals are permitted from the 7th financial year onwards up to 50% of the balance at the end of the fourth preceding year (or preceding year, whichever is lower).
How does PPF compare with Equity Linked Savings Schemes (ELSS)?
PPF offers 100% sovereign capital guarantee, a fixed government-notified interest rate, and a 15-year horizon with complete tax exemption. ELSS mutual funds carry equity market volatility and a 3-year lock-in, with long-term capital gains taxed at 12.5% above ₹1.25 Lakh, but offer higher long-term growth potential.
🔗 Related Government & Long-Term Savings Calculators
Disclaimer: Estimates for information only, not financial advice. PPF interest rates are notified quarterly by the Ministry of Finance and should be verified with incometax.gov.in or indiapost.gov.in.