PPF in depth: the fifth-of-the-month rule, loans and the extension nobody uses

The Public Provident Fund is the most-recommended and least-understood instrument in Indian personal finance. Everyone knows it is safe and tax-free. Far fewer know that the date you deposit decides a month's interest, that the fifteen-year term is a floor rather than a ceiling, or that the account can be borrowed against long before it can be broken.

The three things that make it unusual

It is genuinely EEE. Exempt on contribution (under the old regime's ₹1.5 lakh 80C ceiling), exempt while it accrues, exempt on withdrawal. Almost nothing else in India is taxed this well — not NPS, whose annuity is taxed at slab for life, and certainly not an FD, whose interest is ordinary income every year.

The sovereign guarantee is real. The rate is notified quarterly by the Ministry of Finance and can fall, but the principal is not at risk in the way a credit-risk debt fund can be.

The term is fifteen years and then indefinite. At maturity you may extend in blocks of five years, with or without further contributions, keeping the same tax treatment. A PPF account opened at 30 and extended twice is a tax-free compounding vehicle running to 55 — which is a far more interesting instrument than the fifteen-year product people describe.

The fifth-of-the-month rule

Interest is calculated on the lowest balance between the close of the fifth day and the end of the month.

Deposit on the third and the money earns interest for that month. Deposit on the seventh and it earns nothing until the next one. Over a fifteen-year account funded monthly, systematically depositing after the fifth costs you roughly a month of interest every year — a self-inflicted haircut for no reason at all.

The cleanest version: fund the full ₹1.5 lakh annual limit before the 5th of April, and the entire year's contribution earns a full year's interest. The PPF calculator will show you the difference between that and a December lump sum.

The limits are ₹500 a year at the bottom — miss it and the account goes dormant, revivable with a penalty — and ₹1.5 lakh at the top, counted across every PPF account you and your minor children hold together.

Loans and withdrawals: the account is not as locked as it looks

• From the third year to the sixth, you can take a loan against the balance at a small spread over the account's own rate. Repay it and the account continues untouched.
• From the seventh year, one partial withdrawal a year is allowed, capped at a share of the earlier balance.
• Premature closure is permitted after five years for specified reasons — serious illness, higher education — at an interest penalty.

So the honest description is a fifteen-year commitment with a borrowing facility from year three and a partial tap from year seven. That is a materially more usable instrument than the lockbox reputation suggests, though it is still no substitute for an emergency fund held in something you can reach this week.

Where it fits: PPF is the guaranteed, tax-free floor beneath a portfolio, not the growth engine. The comparison against an equity option for the same ₹1.5 lakh is worked through honestly in ELSS vs PPF and PPF vs mutual funds.

⚠️ The PPF rate is notified quarterly and has changed many times; contribution limits, loan terms and premature-closure conditions are set by rules that are also amended. Verify the current notification before relying on any figure here.

Key takeaway

PPF is EEE, sovereign-guaranteed, and far more flexible than its reputation — loans from year three, partial withdrawals from year seven, and five-year extensions that can run it decades past maturity. Deposit before the fifth of the month, or ideally fund the whole year before the fifth of April, because the interest rule rewards the calendar and nothing else. Treat it as the fixed-income floor, not the growth engine.