PPF After 15 Years: Extend With Contributions, Extend Without, or Close - Which Beats a Debt Fund

The standard advice when your PPF matures is “extend it with contributions, you keep the 80C deduction and the tax-free interest.” For a large number of people that advice is quietly wrong, because the 80C half of it is worth exactly nothing to them. If your EPF already fills the ₹1.5 lakh 80C limit on its own, every rupee of the “80C benefit” you are being sold on the extend-with-contributions path has already been claimed. You are paying attention to a benefit you cannot collect.

Strip that mirage away and the maturity decision becomes a clean numbers problem with three real options and one external benchmark. You have a ₹30 lakh PPF corpus, you are 60, and you have 10 years before you expect to touch it. Do you (1) extend the account and keep feeding it ₹1.5 lakh a year, (2) extend it and let the existing ₹30 lakh just compound with no fresh money, or (3) close it and move the ₹30 lakh into a debt index fund? This post computes the post-tax value at age 70 for each, so you can see which one actually wins instead of repeating a reel.

The three options, and the rules that bite

After the 15th financial year, a PPF account matures. You have exactly three legal choices, and each has rules that change the math.

Close it. Withdraw the entire balance. It is fully tax-free. Done.

Extend WITH contributions. You must submit Form H at your bank or post office within one year of maturity. The account continues in a 5-year block. You keep depositing between ₹500 and ₹1.5 lakh a year, you get the 80C deduction on those fresh deposits, and interest stays tax-free. Withdrawal is restricted: over the whole 5-year block you can take out at most 60% of the balance that stood at the start of the block, and only one withdrawal per financial year.

Extend WITHOUT contributions. This is the default. Do nothing and your matured account automatically rolls into a 5-year block with no fresh deposits. The existing balance keeps earning the full PPF rate, tax-free. Withdrawal here is generous: one withdrawal per financial year, of any amount, no 60% cap.

Two traps worth stating plainly, because they cost real money:

• If you want the extend-WITH-contributions route, the Form H deadline is one year from maturity. Miss it and deposit anyway, and those deposits become “irregular”: they earn zero interest and get no 80C. People lose a full year of interest to this every year.
• Once you have run even one year in the extend-WITHOUT-contributions mode, you cannot switch back to the with-contributions mode. The choice of mode is sticky. So decide deliberately, do not drift into the default by accident.

Both extension modes can be renewed indefinitely in 5-year blocks.

The setup

I will use one concrete person so the numbers are checkable.

Age now            : 60
PPF corpus today   : Rs 30,00,000
Horizon            : 10 years, to age 70
PPF rate           : 7.1% per year, tax-free (current rate)
80C status         : EPF already uses the full Rs 1.5L 80C limit
Tax slab           : 30% + 4% cess = 31.2% on debt income

The 80C line is the whole point. Because EPF already maxes the limit, any fresh PPF deposit this person makes gives zero extra tax deduction. We can therefore judge the fresh money purely on its return, not on a deduction that does not exist.

The debt benchmark is a debt index fund (a target-maturity or constant-duration fund) at 7.5% pre-tax. These run an expense ratio of roughly 0.2% to 0.5%; I use 0.4%, so the net compounding rate is 7.1%, the same as PPF. The gain is taxed at the 30% slab plus cess, which is the rule for debt funds bought after 1 April 2023: no indexation, no special rate, the entire gain added to income at your slab. The one genuine edge a debt fund keeps is deferral, since tax is paid only at redemption, not every year, so I let it compound gross of tax and tax the whole gain at the end.

Decision 1: the existing Rs 30 lakh

Forget fresh contributions for a moment. The first and biggest decision is what to do with the ₹30 lakh you already have. Two homes: leave it in PPF (extend without contributions) or close and move it to the debt fund.

PPF, extend without contributions, 7.1% tax-free for 10 years:

30,00,000 x 1.071^10 = 30,00,000 x 1.985614 = Rs 59,56,842
Tax on withdrawal    = Rs 0  (PPF is exempt-exempt-exempt)
Value at 70          = Rs 59.57 lakh

The ₹30 lakh essentially doubles, tax-free, in 10 years. No paperwork beyond letting it ride, one withdrawal a year available if you need cash.

Debt index fund, 7.1% net of expense, taxed at exit:

Value before tax = 30,00,000 x 1.071^10 = Rs 59,56,842
Gain             = 59,56,842 - 30,00,000 = Rs 29,56,842
Tax at 31.2%     = Rs 9,22,535
Value at 70      = Rs 50,34,307  =  Rs 50.34 lakh

Here is the uncomfortable result. The debt fund and PPF compounded at the identical 7.1%. The fund even started with a headline rate advantage (7.5% gross versus PPF’s 7.1%), and after its small expense ratio it drew level. And it still ends up ₹9.23 lakh behind, purely because the taxman takes 31.2% of the gain at the end while PPF hands it over whole.

What would the debt fund need to earn to catch up?

Solve for the net return that leaves the debt fund with ₹59.57 lakh after 31.2% tax on the gain:

Need after-tax = 59.57L
30L + (FV - 30L) x (1 - 0.312) = 59.57L
(FV - 30L) x 0.688 = 29.57L
FV = 72.98L
72.98 / 30 = 2.4327 = (1 + g)^10
g = 2.4327^(1/10) - 1 = 9.30% net of expense

The debt fund would need to compound at roughly 9.3% net, about 9.7% gross after adding back the expense ratio, just to match a boring 7.1% tax-free PPF. No debt index fund in India delivers 9.7% gross with any reliability. For anyone paying tax on the gain, extend-without-contributions strictly beats a same-yield debt fund. The only way the fund wins is a materially higher return or a near-zero tax rate.

Lower tax slabs narrow it but do not flip it

Not every retiree is in the 30% bracket. If pension and other income land the debt-fund gain in the 20% slab, the fund does better, but PPF still leads:

Debt funds do let you stagger redemptions across years to keep each year’s gain in a lower slab, which is a real advantage a lump-sum FD lacks. But even at a flat 20% the PPF corpus is ₹6 lakh ahead, and only a genuine 0% effective rate brings a tie. For a retiree with any taxable income, closing the PPF to park the same money in debt is handing away lakhs for no gain in yield.

Decision 2: should you add fresh contributions?

Now the extend-WITH-contributions question, judged honestly. The fresh money is ₹1.5 lakh a year for 10 years, ₹15 lakh of your cash in total. Because EPF already fills 80C, there is no deduction to add. So the only thing the PPF route buys for this new money is tax-free compounding at 7.1%.

Fresh ₹1.5 lakh a year, deposited by 5 April each year so it earns from month one (an annuity due), at 7.1% tax-free:

FV factor (annuity due, 7.1%, 10 yrs)
  = [(1.071^10 - 1) / 0.071] x 1.071
  = 13.8819 x 1.071 = 14.8675
Fresh corpus at 70 = 1,50,000 x 14.8675 = Rs 22,30,124  = Rs 22.30 lakh

The same ₹1.5 lakh a year into the debt fund instead, 7.1% net, taxed 31.2% on the total gain at the end:

Value before tax = Rs 22.30 lakh
Total deposited  = Rs 15.00 lakh
Gain             = Rs 7.30 lakh
Tax at 31.2%     = Rs 2.28 lakh
Value at 70      = Rs 20.02 lakh

So the fresh-contributions path is worth about ₹2.3 lakh more than putting the same new money in a debt fund, over 10 years, on ₹15 lakh deposited. It is still a win, just a modest one, and it comes entirely from the tax-free wrapper, not from any 80C magic. The question is whether ₹2.3 lakh is worth tying new money into an account where withdrawals are capped at 60% of the opening balance over a 5-year block. For money you will not need, yes. For money you might, the liquidity cost is not worth ₹23,000 a year.

The three paths side by side

Putting it together for our ₹30 lakh starter. Note the middle row uses ₹15 lakh of extra cash the other two do not, so it is not a like-for-like race; read it as “existing corpus plus a good home for new money.”

The extend-with total of ₹81.87 lakh is simply the ₹59.57 lakh base plus the ₹22.30 lakh of fresh compounding. Closing to a debt fund is the worst outcome on every version of the comparison.

The liquidity you are actually buying

Returns are not the only axis for a 60-year-old. Here is how the three differ on access, which matters when the money is funding retirement.

This is the quiet case for extend-without-contributions. One unrestricted withdrawal a year, of any size, covers almost every retiree’s need for an annual drawdown, while the untouched balance compounds tax-free at a rate a post-tax debt fund cannot match. You get most of the debt fund’s flexibility and all of PPF’s tax advantage. The debt fund’s only real edge, redeem-anytime liquidity, is rarely worth ₹9 lakh.

A note for the 60-plus crowd: SCSS does not change the answer

A retiree will ask about the Senior Citizen Savings Scheme at 8.2%, which looks like it beats PPF’s 7.1%. It does not, after tax. SCSS interest is fully taxable and paid out quarterly, so at the 30% slab:

8.2% x (1 - 0.312) = 5.64% post-tax

A 5.64% post-tax yield loses to PPF’s 7.1% tax-free, and SCSS is capped at ₹30 lakh with its interest taxed every year rather than compounding untouched. SCSS is a fine income product if you need the quarterly payout, but as a growth home for a lump sum it trails an extended PPF for anyone in the 20% or 30% bracket.

When closing actually is the right call

The math favours extending, but closing wins in specific situations, and it is worth being honest about them:

• You want equity exposure for part of this money. That is a different asset-class decision, and comparing PPF to a debt fund is then the wrong comparison. If you are moving to an index equity fund for a genuine 10-year-plus horizon, the expected return gap can justify the risk and the tax.
• You need large, repeated, or unpredictable withdrawals. The one-per-year PPF limit does not fit, and the debt fund’s any-day liquidity earns its keep.
• Your taxable income is genuinely near zero and likely to stay there, so the debt fund’s gain is taxed at close to 0%. Then the tax drag that sinks the fund disappears and it ties PPF on returns with better liquidity.
• You are consolidating a messy set of accounts and the simplicity is worth a few lakh to you. A legitimate, if expensive, reason.

Outside those cases, closing a matured PPF to sit in debt is a tax-driven loss dressed up as a fresh start.

Bottom line

For a ₹30 lakh PPF corpus at 60 with EPF already maxing 80C, and 10 years to let it work:

• Default to extend WITHOUT contributions. The ₹30 lakh grows to ₹59.57 lakh tax-free, beats a same-yield debt fund by ₹9.23 lakh at the 30% slab and ₹6.15 lakh at 20%, and still gives you one unrestricted withdrawal a year. A debt fund would need to earn about 9.7% gross just to draw level, which it will not.
• Add fresh contributions only if the money is truly spare. With no 80C to collect, the extend-with route beats a debt fund by only about ₹2.3 lakh over 10 years and locks withdrawals to 60% of the block. Worth it for parked money, not for money you may need.
• Close only for equity exposure, heavy liquidity needs, or a genuinely zero tax rate. For plain debt parking, closing is the worst of the three.
• Mind the paperwork. Submit Form H within one year if you want the with-contributions mode, and remember the without-contributions default is one-way once you start it.

Figures here are illustrative, assume a flat 7.1% PPF rate and 7.5% debt return that will in reality move, and are not investment advice. Confirm the current PPF rate, your own 80C position, and the fund’s expense ratio and tax treatment before you decide.